Introduction Tongue is a soft muscular tissue which is mainly made of mucosa, muscles, vascular and nerve supply. The mucosa of body is formed from the first pharyngeal arch and third pharyngeal arches; while the skeletal muscles develop from myoblast that migrate from occipital somite's. Aim Owing to its effect on the building structures all around and vital functions, this study was carried out to assess the tongue posture in vertical malrelations; in class I malocclusion. Materials and methods A cephalometric study was carried out on 153 adult patients (76 female, 75 male) from 17 to 22 years old) with skeletal class I. The sample was selected according to the mandibular plane angle (SN/GO-GN) and categorized according to vertical facial pattern into; high angle (SN/MP >37), low angle (SN/MP <27) and average angle (SN/MP 32 ± 5°); including 26 females and 25 males in each group. The tongue position was calculated along horizontal line passing through the incisal edge of the lower central incisor to the cervical distal third of the lower second molar and extending posteriorly. Taking the cervical area as a center, six angles will be drawn at 0°, 30°, 60°, 90°, 12°, and 150°. The contours of the dorsum of the tongue and the palate and six distances will be measured at 0°, 30°, 60°, 90°, 120°, and 150° between tongue and palate contour. Results Tongue positions were found to be higher in position in skeletal class I malocclusion in low and high mandibular plane (posterior part of the tongue); on the other, lower tongue position (anterior part) was found in increased mandibular plane angle without sex differences Conclusion Tongue position is affected by the position of the mandible in vertical plane; regarding the anterior or posterior part without sex differences.
{"title":"Assessment of tongue posture in class I malocclusion with vertical malrelations","authors":"Ahmed Al-Shennawy, Atia Yousif, Neven Abo Taha","doi":"10.4103/tdj.tdj_39_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_39_22","url":null,"abstract":"Introduction Tongue is a soft muscular tissue which is mainly made of mucosa, muscles, vascular and nerve supply. The mucosa of body is formed from the first pharyngeal arch and third pharyngeal arches; while the skeletal muscles develop from myoblast that migrate from occipital somite's. Aim Owing to its effect on the building structures all around and vital functions, this study was carried out to assess the tongue posture in vertical malrelations; in class I malocclusion. Materials and methods A cephalometric study was carried out on 153 adult patients (76 female, 75 male) from 17 to 22 years old) with skeletal class I. The sample was selected according to the mandibular plane angle (SN/GO-GN) and categorized according to vertical facial pattern into; high angle (SN/MP >37), low angle (SN/MP <27) and average angle (SN/MP 32 ± 5°); including 26 females and 25 males in each group. The tongue position was calculated along horizontal line passing through the incisal edge of the lower central incisor to the cervical distal third of the lower second molar and extending posteriorly. Taking the cervical area as a center, six angles will be drawn at 0°, 30°, 60°, 90°, 12°, and 150°. The contours of the dorsum of the tongue and the palate and six distances will be measured at 0°, 30°, 60°, 90°, 120°, and 150° between tongue and palate contour. Results Tongue positions were found to be higher in position in skeletal class I malocclusion in low and high mandibular plane (posterior part of the tongue); on the other, lower tongue position (anterior part) was found in increased mandibular plane angle without sex differences Conclusion Tongue position is affected by the position of the mandible in vertical plane; regarding the anterior or posterior part without sex differences.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"67 1","pages":"105 - 110"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89640726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aims This study was designed to evaluate the amount of bone resorption related to implant in free end saddle in response to different occlusal designs. Patients and methods Twenty patients with unilateral free end saddle in the lower arch till the second premolar were selected and received delayed single dental implants replacing the first molar tooth. They were divided into two main groups according to the implant superstructure deign (n = 10). Group 1: implant-supported fixed dental prosthesis which follow the principals of implant protected occlusion, and with the occlusal contact area of the crown smaller than the occlusal contact area of adjacent tooth. Group 2: implant-supported fixed dental prosthesis which follow the principals of implant protected occlusion, and with the occlusal contact area of the crown larger than the occlusal contact area of adjacent tooth. Patients were evaluated for the amount of marginal bone level at the time of crown insertion, after 3 and 6 months of function. Results There was a statistically significant change by time in marginal bone loss in both groups especially during the first 3 months. However, there was no statistically significant difference between marginal bone loss regarding the two groups. Conclusion It was concluded that increasing the occlusal contact area of the implant superstructure has no effect on marginal bone loss.
{"title":"Marginal bone loss associated with unilateral free end mandibular implant supporting superstructures constructed with different occlusal schemes","authors":"Sara Tamimi, M. Mandour","doi":"10.4103/tdj.tdj_71_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_71_22","url":null,"abstract":"Aims This study was designed to evaluate the amount of bone resorption related to implant in free end saddle in response to different occlusal designs. Patients and methods Twenty patients with unilateral free end saddle in the lower arch till the second premolar were selected and received delayed single dental implants replacing the first molar tooth. They were divided into two main groups according to the implant superstructure deign (n = 10). Group 1: implant-supported fixed dental prosthesis which follow the principals of implant protected occlusion, and with the occlusal contact area of the crown smaller than the occlusal contact area of adjacent tooth. Group 2: implant-supported fixed dental prosthesis which follow the principals of implant protected occlusion, and with the occlusal contact area of the crown larger than the occlusal contact area of adjacent tooth. Patients were evaluated for the amount of marginal bone level at the time of crown insertion, after 3 and 6 months of function. Results There was a statistically significant change by time in marginal bone loss in both groups especially during the first 3 months. However, there was no statistically significant difference between marginal bone loss regarding the two groups. Conclusion It was concluded that increasing the occlusal contact area of the implant superstructure has no effect on marginal bone loss.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"6 1","pages":"84 - 88"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76526298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aim To evaluate and compare the marginal integrity of composite resin restorations made by two different preparation techniques: conventional drill and hydro-abrasion. Materials and methods Forty extracted human premolars with simple occlusal caries were used. The teeth were fixed with sticky wax to the base of plastic cylinder. The cylinder was filled with self-curing acrylic resin so that only root was embedded within the self-curing acrylic resin. The teeth were randomly divided into two main groups (n = 20) according to the preparation technique. Group I: class I cavity preparation was done by the conventional drill method using a #245 Carbide bur and contra angle high-speed hand piece with water coolant. Cavity design was restricted to remove caries with no undercuts, and no beveling. Group II: class I cavity preparation was done by Aquacut Quattro air hydro-abrasion unit which uses a gamma irradiated aluminum oxide particle as abrasives (29 μm), cutting fluid and a hand piece of 0.6 mm diameter tip. The preparation in both groups was restored by the same composite resin (Grandio) and adhesive systems (Futurabond U) following the manufacturer's instructions. All specimens were thermocycled. Impressions for each tooth was made using a polyvinyl Siloxane material. The impressions were then poured with epoxy resin. These replicas were examined under scanning electron microscope. Scanning electron microscope photographs of tested samples were used for the gap evaluation. Results It was found that, group I recorded higher mean value of marginal gap length (157.57 ± 35.15 μm) than group II that recorded (69.55 ± 20.02 μm). Also, group I recorded higher mean value of marginal gap length ratio (10.72 ± 2.47) than group II that recorded (7.44 ± 2.69). Conclusion Conventional drilling technique was faster than the hydro-abrasion technique for cavity preparation. Hydro-abrasion technique showed more marginal adaptation than conventional drilling technique.
{"title":"Marginal integrity of composite resin restoration in class I cavities prepared by hydro-abrasion","authors":"Hager Al-Germ, A. Abdalla, M. Salama","doi":"10.4103/tdj.tdj_47_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_47_22","url":null,"abstract":"Aim To evaluate and compare the marginal integrity of composite resin restorations made by two different preparation techniques: conventional drill and hydro-abrasion. Materials and methods Forty extracted human premolars with simple occlusal caries were used. The teeth were fixed with sticky wax to the base of plastic cylinder. The cylinder was filled with self-curing acrylic resin so that only root was embedded within the self-curing acrylic resin. The teeth were randomly divided into two main groups (n = 20) according to the preparation technique. Group I: class I cavity preparation was done by the conventional drill method using a #245 Carbide bur and contra angle high-speed hand piece with water coolant. Cavity design was restricted to remove caries with no undercuts, and no beveling. Group II: class I cavity preparation was done by Aquacut Quattro air hydro-abrasion unit which uses a gamma irradiated aluminum oxide particle as abrasives (29 μm), cutting fluid and a hand piece of 0.6 mm diameter tip. The preparation in both groups was restored by the same composite resin (Grandio) and adhesive systems (Futurabond U) following the manufacturer's instructions. All specimens were thermocycled. Impressions for each tooth was made using a polyvinyl Siloxane material. The impressions were then poured with epoxy resin. These replicas were examined under scanning electron microscope. Scanning electron microscope photographs of tested samples were used for the gap evaluation. Results It was found that, group I recorded higher mean value of marginal gap length (157.57 ± 35.15 μm) than group II that recorded (69.55 ± 20.02 μm). Also, group I recorded higher mean value of marginal gap length ratio (10.72 ± 2.47) than group II that recorded (7.44 ± 2.69). Conclusion Conventional drilling technique was faster than the hydro-abrasion technique for cavity preparation. Hydro-abrasion technique showed more marginal adaptation than conventional drilling technique.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"86 1","pages":"12 - 19"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79409740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Purpose The purpose of this in-vitro study was to evaluate the marginal fitness of vonlay nanoceramic hybrid restorations using different computer-aided imaging technique (an in-vitro study). Materials and methods Thirty 3D printed models of prepared premolar (no. 14) for vonlay restoration were fabricated using epoxy resin material and used for fabrication of thirty nanohybrid ceramic vonlays (Grandio Disc, VOCO). three groups (n = 10) of vonlays were fabricated using three different imaging technique: group 1: imaging of conventional impression of master die, group 2: imaging of stone master die and group 3: imaging of master die using chairside TRIOS Intraoral Scanners (3Shape). Vonlays were designed by using a CAD design software program (Exocad Dental CAD, Exocad. The vonlays were cemented over their corresponding dies with an automix dual cure adhesive cement system (Duo-Link universal resin cement, Bisco Inc.) under a static load by using custom made seating device. Digital microscope was used to measure the vertical marginal gap for each where a total of 120 measurements for the three groups (12 sites per vonlay and 10 vonlays per group) were evaluated. One-way analysis of variance test was used to analyze the results, Student sample t test was used to examine the marginal gap differences of each group and in the same group. Results A significant difference (P < 0.001) was found between the marginal gap values of the vonlay restoration fabricated by using different imaging technique. The smallest marginal gaps were obtained with vonlay fabricated using chairside intraoral scanners as compared with imaging of master die impression and stone master die. But there was no significant difference between the marginal gap measurements of different sides in the same group. Conclusion The smallest marginal gaps were obtained with vonlay fabricated using chairside intraoral scanners.
{"title":"Comparative evaluation of the marginal fitness of vonlay nanoceramic hybrid restorations using different computer-aided imaging techniques: an in-vitro study","authors":"Zaynab Salem, M. Shakal, R. El-Dessouky","doi":"10.4103/tdj.tdj_48_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_48_22","url":null,"abstract":"Purpose The purpose of this in-vitro study was to evaluate the marginal fitness of vonlay nanoceramic hybrid restorations using different computer-aided imaging technique (an in-vitro study). Materials and methods Thirty 3D printed models of prepared premolar (no. 14) for vonlay restoration were fabricated using epoxy resin material and used for fabrication of thirty nanohybrid ceramic vonlays (Grandio Disc, VOCO). three groups (n = 10) of vonlays were fabricated using three different imaging technique: group 1: imaging of conventional impression of master die, group 2: imaging of stone master die and group 3: imaging of master die using chairside TRIOS Intraoral Scanners (3Shape). Vonlays were designed by using a CAD design software program (Exocad Dental CAD, Exocad. The vonlays were cemented over their corresponding dies with an automix dual cure adhesive cement system (Duo-Link universal resin cement, Bisco Inc.) under a static load by using custom made seating device. Digital microscope was used to measure the vertical marginal gap for each where a total of 120 measurements for the three groups (12 sites per vonlay and 10 vonlays per group) were evaluated. One-way analysis of variance test was used to analyze the results, Student sample t test was used to examine the marginal gap differences of each group and in the same group. Results A significant difference (P < 0.001) was found between the marginal gap values of the vonlay restoration fabricated by using different imaging technique. The smallest marginal gaps were obtained with vonlay fabricated using chairside intraoral scanners as compared with imaging of master die impression and stone master die. But there was no significant difference between the marginal gap measurements of different sides in the same group. Conclusion The smallest marginal gaps were obtained with vonlay fabricated using chairside intraoral scanners.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"145 1","pages":"20 - 26"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89033770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aim This research aimed to evaluate the remineralization potential, hardness and color change of teeth restored with resin infiltration versus comparators that were pretreated with grape seed extract (GSE) gel before resin infiltration. Methods Thirty-six teeth samples were artificially demineralized. The samples were randomly assigned to two groups: group 1: teeth restored with resin infiltration material (Icon) and group 2: teeth pretreated with GSE gel before resin infiltration with Icon. A scanning electron microscope was used to examine teeth samples before and after demineralization and after restoration. Energy dispersive radiograph analysis was employed to analyze the calcium and phosphorus weight percent of samples before and after restoration to detect remineralization. Both groups were subjected to a hardness test using a Vickers microhardness tester. Color change after the restoration of the two groups was detected using a spectrophotometer after 1 day and 1 month of immersion in deionized water. Results Group 2 exhibited occlusion of defect microporosity with a more uniform surface compared to group 1. Group 2 had significantly higher calcium weight %. Both groups showed significant improvement in hardness but a nonsignificant mean difference between the two groups. Color change after 1 day and 1 month were significant for both groups but ΔE values after 1 month are within the clinically acceptable range for a color change compared to intact enamel. Conclusion Pretreatment of artificially demineralized enamel with GSE gel before resin infiltration is a promising procedure that can bridge the gap between the noninvasive and minimally invasive treatment of white spot lesions.
{"title":"Remineralization potential, hardness and color change of artificially demineralized enamel treated with grape seed extract gel and restored with resin infiltration: in-vitro study","authors":"Huda El Gendi, N. Abouraya","doi":"10.4103/tdj.tdj_56_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_56_22","url":null,"abstract":"Aim This research aimed to evaluate the remineralization potential, hardness and color change of teeth restored with resin infiltration versus comparators that were pretreated with grape seed extract (GSE) gel before resin infiltration. Methods Thirty-six teeth samples were artificially demineralized. The samples were randomly assigned to two groups: group 1: teeth restored with resin infiltration material (Icon) and group 2: teeth pretreated with GSE gel before resin infiltration with Icon. A scanning electron microscope was used to examine teeth samples before and after demineralization and after restoration. Energy dispersive radiograph analysis was employed to analyze the calcium and phosphorus weight percent of samples before and after restoration to detect remineralization. Both groups were subjected to a hardness test using a Vickers microhardness tester. Color change after the restoration of the two groups was detected using a spectrophotometer after 1 day and 1 month of immersion in deionized water. Results Group 2 exhibited occlusion of defect microporosity with a more uniform surface compared to group 1. Group 2 had significantly higher calcium weight %. Both groups showed significant improvement in hardness but a nonsignificant mean difference between the two groups. Color change after 1 day and 1 month were significant for both groups but ΔE values after 1 month are within the clinically acceptable range for a color change compared to intact enamel. Conclusion Pretreatment of artificially demineralized enamel with GSE gel before resin infiltration is a promising procedure that can bridge the gap between the noninvasive and minimally invasive treatment of white spot lesions.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"16 1","pages":"34 - 41"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88523555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aim To evaluate and compare initial enamel caries treated by ozone gel with or without nanohydroxyapatite paste or fluoride gel. Materials and methods 30 intact, noncarious freshly extracted human premolars, were collected, cleaned from all soft debris and/or calculus and polished using prophy polishing paste. Each tooth was sectioned first at cement enamel junction (CEJ) to separate crown after removal of root. Each crown was mesiodistally sectioned to a thickness of 1–2 mm then stored in artificial saliva which was periodically changed. All the specimens were exposed to demineralizing solution at occlusal surface only (the surface of the study) for creation of enamel lesions. All the specimens were examined with, EDX and tested under PLM to evaluate enamel surface. After demineralization the specimens were divided randomly into three equal groups I, II and III consist of 10 specimens of each group. For group I Ozonized olive oil gel was used alone on occlusal surface for 1 min once daily, group II was treated as group I followed by application of 5% nanohydroxyapatite paste, while all specimens in group III were treated as group I followed by fluoride gel application. All the procedures at the three groups were repeated daily for 21 days. Result It was found that nonsignificant difference among the mean wt % values of mineral contents (Ca, P, and Ca/P ratio) between the three treatment groups at baseline and after demineralization (P ≥ 0.5), by using ANOVA test at remineralization stage it was found that (group II) recorded the highest mineral content with a mean value of 69.58 ± 1.54 followed by (group III) with a mean value of 69.36 ± 1.04 while the lowest mineral content mean value was 67.43 ± 0.92 which related to (group I). Also, highly statistically significant difference between the three groups was recorded (P = 0.001). Findings using PLM supported the previous results revealing decrease in optical reflectivity and the positive birefringent area which was about to appear broad positively birefringent body after demineralization and disappear after remineralization indicating a great mineral content recovery at all the three groups.
{"title":"Therapeutic effect of ozone gel on the initial carious lesions","authors":"MahaA Alsharqawy, WedadM Etman, MirvatM Salama, RedaG Saleh","doi":"10.4103/tdj.tdj_40_23","DOIUrl":"https://doi.org/10.4103/tdj.tdj_40_23","url":null,"abstract":"Aim To evaluate and compare initial enamel caries treated by ozone gel with or without nanohydroxyapatite paste or fluoride gel. Materials and methods 30 intact, noncarious freshly extracted human premolars, were collected, cleaned from all soft debris and/or calculus and polished using prophy polishing paste. Each tooth was sectioned first at cement enamel junction (CEJ) to separate crown after removal of root. Each crown was mesiodistally sectioned to a thickness of 1–2 mm then stored in artificial saliva which was periodically changed. All the specimens were exposed to demineralizing solution at occlusal surface only (the surface of the study) for creation of enamel lesions. All the specimens were examined with, EDX and tested under PLM to evaluate enamel surface. After demineralization the specimens were divided randomly into three equal groups I, II and III consist of 10 specimens of each group. For group I Ozonized olive oil gel was used alone on occlusal surface for 1 min once daily, group II was treated as group I followed by application of 5% nanohydroxyapatite paste, while all specimens in group III were treated as group I followed by fluoride gel application. All the procedures at the three groups were repeated daily for 21 days. Result It was found that nonsignificant difference among the mean wt % values of mineral contents (Ca, P, and Ca/P ratio) between the three treatment groups at baseline and after demineralization (P ≥ 0.5), by using ANOVA test at remineralization stage it was found that (group II) recorded the highest mineral content with a mean value of 69.58 ± 1.54 followed by (group III) with a mean value of 69.36 ± 1.04 while the lowest mineral content mean value was 67.43 ± 0.92 which related to (group I). Also, highly statistically significant difference between the three groups was recorded (P = 0.001). Findings using PLM supported the previous results revealing decrease in optical reflectivity and the positive birefringent area which was about to appear broad positively birefringent body after demineralization and disappear after remineralization indicating a great mineral content recovery at all the three groups.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aim To assess the accuracy of using computer designed genioplasty osteotomy guide and customized repositioning plates in patients with chin deformities. Methods This was prospective randomized noncontrolled clinical study that was carried out on eight adult patients suffering from chin deformities as a result of unilateral temporomandibular joint ankylosis. Patients were selected from the outpatient clinic, Department of Oral and Maxillofacial surgery, Faculty of Dentistry, Tanta University. All cases were operated for genioplasty under general anesthesia. The incision was performed on the alveolar mucosa apical to the attached gingiva by 0.5 cm in two planes (mucosal and muscular), The cutting guide was seated to the mandibular dentition, the eight screw holes were then drilled, the cutting guide was temporarily fixed on the mandible by mini screws, once the osteotomy plane was marked by a surgical saw, the cutting guide was removed, osteotomy completed routinely and the customized reposition plates were installed to reposition the chin segment as planned. Finally, after the screws were placed and tightened, the chin segment was automatically moved to its final planned position and secured. Closure was done in two layers (the muscle layer followed by the mucosa). Results Genioplasty procedure using customized surgical guide and repositioning plates was performed in every case. Postoperative recovery was satisfactory for all patients. There were no intraoperative or postoperative complications, except self-limiting edema and some small hematomas with no clinical significance. Postoperative pain intensity measured by the Visual Analog Scale was acceptable for all patients. All cases reported full recovery from neurosensory disturbance after three months follow-up periods. Regarding patients' satisfaction, all the cases were very satisfied (grade I) with a percentage of 100% on the third month postoperatively. Conclusion The results obtained from this study show that using customized surgical guide and repositioning plates in performing genioplasty had advantages over conventional technique as they provided greater accuracy, safety, less complication during the surgery with decrease in surgery time, and made the results of genioplasty procedure more predictable. So, using customized surgical guide and repositioning plates simplified the genioplasty procedure.
{"title":"Correction of chin deformities using customized surgical guide and repositioning plates","authors":"MohamedA Abouseada, MohamadS Khedr, IbrahimM Nowair, RaficR Beder","doi":"10.4103/tdj.tdj_68_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_68_22","url":null,"abstract":"Aim To assess the accuracy of using computer designed genioplasty osteotomy guide and customized repositioning plates in patients with chin deformities. Methods This was prospective randomized noncontrolled clinical study that was carried out on eight adult patients suffering from chin deformities as a result of unilateral temporomandibular joint ankylosis. Patients were selected from the outpatient clinic, Department of Oral and Maxillofacial surgery, Faculty of Dentistry, Tanta University. All cases were operated for genioplasty under general anesthesia. The incision was performed on the alveolar mucosa apical to the attached gingiva by 0.5 cm in two planes (mucosal and muscular), The cutting guide was seated to the mandibular dentition, the eight screw holes were then drilled, the cutting guide was temporarily fixed on the mandible by mini screws, once the osteotomy plane was marked by a surgical saw, the cutting guide was removed, osteotomy completed routinely and the customized reposition plates were installed to reposition the chin segment as planned. Finally, after the screws were placed and tightened, the chin segment was automatically moved to its final planned position and secured. Closure was done in two layers (the muscle layer followed by the mucosa). Results Genioplasty procedure using customized surgical guide and repositioning plates was performed in every case. Postoperative recovery was satisfactory for all patients. There were no intraoperative or postoperative complications, except self-limiting edema and some small hematomas with no clinical significance. Postoperative pain intensity measured by the Visual Analog Scale was acceptable for all patients. All cases reported full recovery from neurosensory disturbance after three months follow-up periods. Regarding patients' satisfaction, all the cases were very satisfied (grade I) with a percentage of 100% on the third month postoperatively. Conclusion The results obtained from this study show that using customized surgical guide and repositioning plates in performing genioplasty had advantages over conventional technique as they provided greater accuracy, safety, less complication during the surgery with decrease in surgery time, and made the results of genioplasty procedure more predictable. So, using customized surgical guide and repositioning plates simplified the genioplasty procedure.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Background The aim of the study was evaluating of fracture resistance, marginal and internal adaptation of endocrowns using two different heat-press ceramic materials using the universal testing machine for fracture assessment and a scanning electron microscope (SEM) for marginal and internal adaptation assessment. Methods 40 extracted human mandibular first molars were collected for the study. The teeth were mounted in acrylic blocks using a dental surveyor. All teeth were endodontically treated and prepared for endocrown restorations. All samples were divided into two groups according to the material used (n = 20): group (a) for lithium disilicate glass-ceramic (IPS e.max press) and group (b) for zirconia-reinforced lithium silicate glass ceramic (VITA Ambria). Specimens of each group were subdivided into two subgroups (n = 10): subgroup (1) for assessment of fracture resistance and subgroup (2) for assessment of marginal and internal adaptation. Waxing up all teeth was done using CAD/CAM technology. Endocrowns were fabricated with the heat press method. Bonded endocrown specimens were stored at 37°C and 100% humidity for 24 h in an incubator before testing. The fracture resistance of samples was tested using a universal testing machine. Marginal adaptation and internal adaptation were assessed using a SEM. Quantities variables were expressed as mean and standard deviation using one-way analysis of variance (ANOVA) followed by Tukey's post hoc test at (a = 0.05). Results The Vita Ambria mean values (2174.99 N±537.65) had more compressive strength than IPS e.max press mean values (1974.33 N±566.35). Considering the marginal adaptation test using SEM, there was no significant difference between both materials (P = 0.656) and there was also no significant difference between either of the materials (P = 0.855) after the internal adaptation test using SEM. Conclusion Vita Ambria endocrowns had higher compressive strength than IPS e.max press ceramic endocrowns. During the evaluation of marginal and internal adaptation, there was no significant difference between both materials and their values were within the clinically acceptable values.
{"title":"Assessment of fracture resistance, marginal and internal adaptation of endocrown using two different heat – press ceramic materials: an in-vitro study","authors":"AhmedR A. ElHamid, GaberI Masoud, AbeerA Younes","doi":"10.4103/tdj.tdj_34_23","DOIUrl":"https://doi.org/10.4103/tdj.tdj_34_23","url":null,"abstract":"Background The aim of the study was evaluating of fracture resistance, marginal and internal adaptation of endocrowns using two different heat-press ceramic materials using the universal testing machine for fracture assessment and a scanning electron microscope (SEM) for marginal and internal adaptation assessment. Methods 40 extracted human mandibular first molars were collected for the study. The teeth were mounted in acrylic blocks using a dental surveyor. All teeth were endodontically treated and prepared for endocrown restorations. All samples were divided into two groups according to the material used (n = 20): group (a) for lithium disilicate glass-ceramic (IPS e.max press) and group (b) for zirconia-reinforced lithium silicate glass ceramic (VITA Ambria). Specimens of each group were subdivided into two subgroups (n = 10): subgroup (1) for assessment of fracture resistance and subgroup (2) for assessment of marginal and internal adaptation. Waxing up all teeth was done using CAD/CAM technology. Endocrowns were fabricated with the heat press method. Bonded endocrown specimens were stored at 37°C and 100% humidity for 24 h in an incubator before testing. The fracture resistance of samples was tested using a universal testing machine. Marginal adaptation and internal adaptation were assessed using a SEM. Quantities variables were expressed as mean and standard deviation using one-way analysis of variance (ANOVA) followed by Tukey's post hoc test at (a = 0.05). Results The Vita Ambria mean values (2174.99 N±537.65) had more compressive strength than IPS e.max press mean values (1974.33 N±566.35). Considering the marginal adaptation test using SEM, there was no significant difference between both materials (P = 0.656) and there was also no significant difference between either of the materials (P = 0.855) after the internal adaptation test using SEM. Conclusion Vita Ambria endocrowns had higher compressive strength than IPS e.max press ceramic endocrowns. During the evaluation of marginal and internal adaptation, there was no significant difference between both materials and their values were within the clinically acceptable values.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Purpose investigate shear bond strength of different bulk-fill composite systems to the dentin with or without preheating. Material and methods This in vitro study was performed on sixty sounds extracted periodontally affected human molars. The enamel of the occlusal surfaces was removed to expose the superficial dentin. The samples with flat occlusal dentin surfaces were randomly divided into two groups of thirty teeth each (n = 30) according to the type of restoration material used, each group is then subdivided into two subgroups (A and B) each (15 specimens), corresponding to the modified technique of application with or without preheating using transparent polymer tubes 4 × 4mm. Group I: X-tra fill bulk fill composite and Group II: Tetric®N-Ceram Nano hybrid Bulk fill composite (compules). All specimens were subjected to thermocycling and were tested in shear mode. The debonded surfaces of the samples were inspected to determine the mode of failure for each specimen. All data was collected, tabulated, and statistically analyzed. Results There were no significant differences between the shear bond strength of two studied groups (X-tra fill and Tetric N-ceram bulk-fill) and their subgroups (A and B), considering with preheating modality recorded slightly higher insignificant statistically mean values in MPa. The most observed mode of failures in composite resin were of mixed mode. The type of composite resin material has no statistically significant difference effect of shear bond strength. On the other hand, it was found that there is a significant effect of the thermal treatment modality on the bond strength regardless the type of composite material used. Conclusion within the limits of the present study, the preheated bulk fill composite resin had a superior significant bond strength to dentin compared to unheated one.
{"title":"Shear bond strength of different bulk fill composite systems to dentin with or without preheating","authors":"IbrahimA Salem, HusseinY Elsayed, MirvatM Salama","doi":"10.4103/tdj.tdj_5_23","DOIUrl":"https://doi.org/10.4103/tdj.tdj_5_23","url":null,"abstract":"Purpose investigate shear bond strength of different bulk-fill composite systems to the dentin with or without preheating. Material and methods This in vitro study was performed on sixty sounds extracted periodontally affected human molars. The enamel of the occlusal surfaces was removed to expose the superficial dentin. The samples with flat occlusal dentin surfaces were randomly divided into two groups of thirty teeth each (n = 30) according to the type of restoration material used, each group is then subdivided into two subgroups (A and B) each (15 specimens), corresponding to the modified technique of application with or without preheating using transparent polymer tubes 4 × 4mm. Group I: X-tra fill bulk fill composite and Group II: Tetric®N-Ceram Nano hybrid Bulk fill composite (compules). All specimens were subjected to thermocycling and were tested in shear mode. The debonded surfaces of the samples were inspected to determine the mode of failure for each specimen. All data was collected, tabulated, and statistically analyzed. Results There were no significant differences between the shear bond strength of two studied groups (X-tra fill and Tetric N-ceram bulk-fill) and their subgroups (A and B), considering with preheating modality recorded slightly higher insignificant statistically mean values in MPa. The most observed mode of failures in composite resin were of mixed mode. The type of composite resin material has no statistically significant difference effect of shear bond strength. On the other hand, it was found that there is a significant effect of the thermal treatment modality on the bond strength regardless the type of composite material used. Conclusion within the limits of the present study, the preheated bulk fill composite resin had a superior significant bond strength to dentin compared to unheated one.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AbdelMonemM AbulAzm, AliI Abdalla, MostafaM Hassan
Purpose Evaluation of the effect of adhesive mode and CHX application on microtensile bond strength of the universal adhesive to caries-affected dentin. Material and methods Twenty human permanent molars with simple occlusal caries were collected. Teeth were randomly divided into two main equal groups according to adhesive mode (Etch and rinse {ER} or Self etch {SE}). Each group was subdivided into two subgroups according to CHX pretreatment with four subgroups obtained; A1: ER, A2: ER+CHX, B1: SE and B2: SE+CHX. Occlusal enamel was trimmed to obtain flat dentin surface composed of CAD surrounded by sound dentin. Universal adhesive was applied according to adhesive mode and CHX application followed by composite resin build-up. Specimens were stored in 5% citric acid for 3 months then subjected to 5000 cycles of thermocycling. Then, all specimens were sectioned into slabs and then bars with cross-section 0.9 ± 0.01 mm2. Bars with CAD were selected for μTBS test until failure. Failure modes analysis was determined using stereomicroscope. Results Both adhesive modes with and without CHX application tested on CAD presented similar μTBS (P > 0.05). Subgroup A1 recorded the highest μTBS followed by Subgroup B1 which is statically nonsignificant (P = 0.112). No statistically significant difference was found when comparing the effect of CHX on bond strength for both Subgroups A2 and B2 when compared with control groups (A1 and B1). Predominance of adhesive/mixed failure was noticed for all subgroups. Conclusion ER approach could not improve bonding performance of universal adhesives to CAD. CHX did not interfere with bond strength to CAD.
{"title":"Microtensile bond strength of universal adhesive","authors":"AbdelMonemM AbulAzm, AliI Abdalla, MostafaM Hassan","doi":"10.4103/tdj.tdj_70_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_70_22","url":null,"abstract":"Purpose Evaluation of the effect of adhesive mode and CHX application on microtensile bond strength of the universal adhesive to caries-affected dentin. Material and methods Twenty human permanent molars with simple occlusal caries were collected. Teeth were randomly divided into two main equal groups according to adhesive mode (Etch and rinse {ER} or Self etch {SE}). Each group was subdivided into two subgroups according to CHX pretreatment with four subgroups obtained; A1: ER, A2: ER+CHX, B1: SE and B2: SE+CHX. Occlusal enamel was trimmed to obtain flat dentin surface composed of CAD surrounded by sound dentin. Universal adhesive was applied according to adhesive mode and CHX application followed by composite resin build-up. Specimens were stored in 5% citric acid for 3 months then subjected to 5000 cycles of thermocycling. Then, all specimens were sectioned into slabs and then bars with cross-section 0.9 ± 0.01 mm2. Bars with CAD were selected for μTBS test until failure. Failure modes analysis was determined using stereomicroscope. Results Both adhesive modes with and without CHX application tested on CAD presented similar μTBS (P > 0.05). Subgroup A1 recorded the highest μTBS followed by Subgroup B1 which is statically nonsignificant (P = 0.112). No statistically significant difference was found when comparing the effect of CHX on bond strength for both Subgroups A2 and B2 when compared with control groups (A1 and B1). Predominance of adhesive/mixed failure was noticed for all subgroups. Conclusion ER approach could not improve bonding performance of universal adhesives to CAD. CHX did not interfere with bond strength to CAD.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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