Objective The aim of the present study was to evaluate the effect of whitening agents on the bond strength of resin composite repair. This study was also carried out to compare the bond strength of a solvent-free self-etch adhesive to that of two different self-etch adhesives. Materials and method Twenty-seven discs were prepared using resin composite, which were assigned into three groups (n = 9). The first group was used as control. The other discs were divided into 2groups according to the whitening agent utilized, Crest 3D White Strips Advanced Vivid and Colgate Visible White 9% Mint applied once a day for 14 days. Each group was further subdivided into 3 subgroups (n = 3) according to the adhesive system used, [solvent-free self-etching adhesive system], [self-etching adhesive system], and [self-etching adhesive system]. Microcylinders were constructed, microshear test was performed and the data was registered in MPa. Results The whitening agent, the adhesive resin system and the interaction between the variables had a significant effect on the bond strength (P ≤ 0.05). [Solvent-free self-etching adhesive system] and [Self-etching adhesive system] performed similarly, where both showed significantly highest mean microshear bond strength values. Whereas, [self-etching adhesive system] showed the statistically lowest mean bond strength. The highest mean bond strength was found without whitening agent, thenColgate visible white, while Crest 3D white strips showed the lowest bond strength values. Conclusion It was concluded that the tested whitening agents reduced the bond strength, with comparable performance of both (solvent-free self-etching adhesive system).
{"title":"Effect of the commercially available whitening agents on the microshear bond strength of resin composite restoration","authors":"Rania Mubarak","doi":"10.4103/tdj.tdj_37_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_37_22","url":null,"abstract":"Objective The aim of the present study was to evaluate the effect of whitening agents on the bond strength of resin composite repair. This study was also carried out to compare the bond strength of a solvent-free self-etch adhesive to that of two different self-etch adhesives. Materials and method Twenty-seven discs were prepared using resin composite, which were assigned into three groups (n = 9). The first group was used as control. The other discs were divided into 2groups according to the whitening agent utilized, Crest 3D White Strips Advanced Vivid and Colgate Visible White 9% Mint applied once a day for 14 days. Each group was further subdivided into 3 subgroups (n = 3) according to the adhesive system used, [solvent-free self-etching adhesive system], [self-etching adhesive system], and [self-etching adhesive system]. Microcylinders were constructed, microshear test was performed and the data was registered in MPa. Results The whitening agent, the adhesive resin system and the interaction between the variables had a significant effect on the bond strength (P ≤ 0.05). [Solvent-free self-etching adhesive system] and [Self-etching adhesive system] performed similarly, where both showed significantly highest mean microshear bond strength values. Whereas, [self-etching adhesive system] showed the statistically lowest mean bond strength. The highest mean bond strength was found without whitening agent, thenColgate visible white, while Crest 3D white strips showed the lowest bond strength values. Conclusion It was concluded that the tested whitening agents reduced the bond strength, with comparable performance of both (solvent-free self-etching adhesive system).","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"3 1","pages":"197 - 203"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89315749","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}
M. Helal, H. Elguindy, Sahar M. F. Ghoraba, M. Shoukheba, S. Yasser
Purpose The current study was conducted to evaluate the effect of fascia lata allograft (FLA) versus subepithelial connective tissue grafts (SCTGs) in increasing the peri-implant mucosal thickness when placed simultaneously with dental implant histologically and histomorphometrically in human. Patients and methods A total of 16 patients who met the inclusion criteria were selected to be included in this study. They were randomly classified into two treatment groups: a test group (FLA) and a control group (SCTGs), with eight implantation sites in each group. Three months after implantation, the augmented sites were located, soft tissue biopsies (n = 16) (punch biopsy) were collected for histological and histomorphometry analysis. Results Both grafts were integrated well into the surrounding soft tissues. Regarding percentage of fibrovascular tissue at 3 months postsurgery showed a significant increase in FLA graft in comparison with SCTGs it was (36.52 in the FLA group and 24.17 in the SCTGs group). A significant difference in the vimentin expression percentage in favor of FLA grafts in comparison with SCTGs; it was (24.95% for FLA) where it was (7.24% for SCTGs). Conclusions FLA was found to be clinically save with no adverse reactions and integrated well into the surrounding soft tissues and organized by newly formed connective tissue, and provided results are comparable to SCTGs (the gold standard).
{"title":"Fascia lata allograft versus subepithelial connective tissue grafts in the peri-implant mucosal thickness enhancement (histological evaluation)","authors":"M. Helal, H. Elguindy, Sahar M. F. Ghoraba, M. Shoukheba, S. Yasser","doi":"10.4103/tdj.tdj_23_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_23_22","url":null,"abstract":"Purpose The current study was conducted to evaluate the effect of fascia lata allograft (FLA) versus subepithelial connective tissue grafts (SCTGs) in increasing the peri-implant mucosal thickness when placed simultaneously with dental implant histologically and histomorphometrically in human. Patients and methods A total of 16 patients who met the inclusion criteria were selected to be included in this study. They were randomly classified into two treatment groups: a test group (FLA) and a control group (SCTGs), with eight implantation sites in each group. Three months after implantation, the augmented sites were located, soft tissue biopsies (n = 16) (punch biopsy) were collected for histological and histomorphometry analysis. Results Both grafts were integrated well into the surrounding soft tissues. Regarding percentage of fibrovascular tissue at 3 months postsurgery showed a significant increase in FLA graft in comparison with SCTGs it was (36.52 in the FLA group and 24.17 in the SCTGs group). A significant difference in the vimentin expression percentage in favor of FLA grafts in comparison with SCTGs; it was (24.95% for FLA) where it was (7.24% for SCTGs). Conclusions FLA was found to be clinically save with no adverse reactions and integrated well into the surrounding soft tissues and organized by newly formed connective tissue, and provided results are comparable to SCTGs (the gold standard).","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"23 1","pages":"229 - 234"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85918741","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 The aim of this study was to evaluate the effect of two different concentrations of chitosan irrigation with two rotary systems (Revo-S and One Shape) on smear layer removal during root canal treatment using scanning electron microscope. Materials and methods Forty freshly extracted human premolar with single canal and nearly straight roots were collected. Teeth were decoronated to obtain a standardized root length of nearly 15 ± 1 mm. Samples were randomly divided into four main groups (n = 10) according to rotary preparation system and final chitosan irrigation concentration used. Group I: Revo-S rotary system and 5 ml of 0.2% chitosan solution for 3 min as final irrigation. Group II: One Shape single file and 5 ml of 0.2% chitosan solution for 3 min as final irrigation. Group III: Revo-S rotary system and 5 ml of 0.37% chitosan solution for 3 min as final irrigation. Group IV: One Shape single file and 5 ml 0.37% of chitosan solution for 3 min as final irrigation. During preparation and after change of each succeeding file, root canal irrigated with freshly prepared 5 ml of 2.5% sodium hypochlorite solution. Then, rinsed with 5 ml of distilled water. Finally, root canals were irrigated with final chitosan irrigation concentration as mentioned in groups. Samples were split longitudinally and examined by scanning electron microscope analysis. Root canal cleanliness was qualitatively assessed at the coronal, middle, and apical regions of root halves. Kruskal–Wallis test was used to compare between final irrigation solutions at each section and Mann–Whitney U test was used for pair-wise comparisons between groups whenever indicated. The significance level was set at P value less than or equal to 0.05. Results It showed that there were no statistical significant differences between groups for smear layer covering the dentinal surfaces. When comparing different root levels, there were no statistical significant differences between coronal versus middle levels but between coronal versus apical and middle versus apical statistical significant differences were found. Conclusions Smear layer can be removed effectively in all tested groups from coronal and middle levels compared to apical level. Using multiple file system (Revo-S files) is better than single file system (One Shape file) in removal of the smear layer of root canal. Increasing the concentration of chitosan to 0.37% promoted removal of the smear layer better than 0.2% of chitosan.
{"title":"Effect of two different concentrations of chitosan irrigation on smear layer removal during root canal treatment","authors":"D. El-latif, A. Darrag, D. Sherif","doi":"10.4103/tdj.tdj_38_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_38_22","url":null,"abstract":"Aim The aim of this study was to evaluate the effect of two different concentrations of chitosan irrigation with two rotary systems (Revo-S and One Shape) on smear layer removal during root canal treatment using scanning electron microscope. Materials and methods Forty freshly extracted human premolar with single canal and nearly straight roots were collected. Teeth were decoronated to obtain a standardized root length of nearly 15 ± 1 mm. Samples were randomly divided into four main groups (n = 10) according to rotary preparation system and final chitosan irrigation concentration used. Group I: Revo-S rotary system and 5 ml of 0.2% chitosan solution for 3 min as final irrigation. Group II: One Shape single file and 5 ml of 0.2% chitosan solution for 3 min as final irrigation. Group III: Revo-S rotary system and 5 ml of 0.37% chitosan solution for 3 min as final irrigation. Group IV: One Shape single file and 5 ml 0.37% of chitosan solution for 3 min as final irrigation. During preparation and after change of each succeeding file, root canal irrigated with freshly prepared 5 ml of 2.5% sodium hypochlorite solution. Then, rinsed with 5 ml of distilled water. Finally, root canals were irrigated with final chitosan irrigation concentration as mentioned in groups. Samples were split longitudinally and examined by scanning electron microscope analysis. Root canal cleanliness was qualitatively assessed at the coronal, middle, and apical regions of root halves. Kruskal–Wallis test was used to compare between final irrigation solutions at each section and Mann–Whitney U test was used for pair-wise comparisons between groups whenever indicated. The significance level was set at P value less than or equal to 0.05. Results It showed that there were no statistical significant differences between groups for smear layer covering the dentinal surfaces. When comparing different root levels, there were no statistical significant differences between coronal versus middle levels but between coronal versus apical and middle versus apical statistical significant differences were found. Conclusions Smear layer can be removed effectively in all tested groups from coronal and middle levels compared to apical level. Using multiple file system (Revo-S files) is better than single file system (One Shape file) in removal of the smear layer of root canal. Increasing the concentration of chitosan to 0.37% promoted removal of the smear layer better than 0.2% of chitosan.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"164 1","pages":"204 - 211"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75970826","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}
Objective Evaluate the shear bond strength of composite resin bonded to carious like dentin lesions remineralized by chicken eggshell powder solution (CESP). Materials and methods Thirty-six freshly extracted human third molars were used. The occlusal surfaces were grinded removing all enamel and exposing a flat surface of dentin. A 5 × 5 mm window was made and specimens were divided randomly into three equal groups (12 each). Group I (sound dentin as control group) no further treatment was done. Groups II and III, artificial demineralized dentin like lesions were induced by immersion for 96 h in a specially prepared acidic buffer solution (pH 4.2). In specimens of group II (demineralized dentin), no further treatment was done. For group III remineralization was induced by immersion in 3% eggshell powder solution for 12 min and incubated at 37° twice daily with 12 h intervals between both immersions for seven consecutive days. Light curing resin composite cylinders with universal bonding agent were formed with the aid of polymer tubes (4 mm diameter 4 mm height). All specimens were thermo-cycled for 500 cycles from 5 to 55°C. Shear bond strength test was done using universal testing machine with crosshead speed of 0.5 mm/min until failure occurred. Analysis of mode of failure was done by examining fractured surfaces of debonded specimens under stereomicroscope. Results Group I (normal sound dentin) recoded a significant highest mean value of shear bond strength at 19.38 ± 5.22 MPa followed by group III (remineralized dentin) at 12.94 ± 3.03 MPa which is statically significant higher mean shear bond strength value than group II (demineralized dentin) which recorded mean shear bond at 8.98 ± 3.32. Statistically significant difference was found when comparing mode of failure between three groups; group I showed the highest number of cohesive and mixed failures followed by group III, while group II showed no cohesive failures. Overall, more pronounced adhesive and mixed failures were found regardless of grouping also strong positive significant relation between mode of failure and shear bond strength (maximum load) was found. Conclusion Shear bond strength of composite resin to specimens treated with CESPS showed increase in bond strength values. Treated remineralized specimens with CESPS showed significantly higher number of cohesive/mixed modes of failure compared to demineralized specimens.
{"title":"Shear bond strength of resin composite to remineralized caries affected dentin using chicken eggshell powder","authors":"Hussein Shady, Hussein Y Elsayed, M. Salama","doi":"10.4103/tdj.tdj_31_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_31_22","url":null,"abstract":"Objective Evaluate the shear bond strength of composite resin bonded to carious like dentin lesions remineralized by chicken eggshell powder solution (CESP). Materials and methods Thirty-six freshly extracted human third molars were used. The occlusal surfaces were grinded removing all enamel and exposing a flat surface of dentin. A 5 × 5 mm window was made and specimens were divided randomly into three equal groups (12 each). Group I (sound dentin as control group) no further treatment was done. Groups II and III, artificial demineralized dentin like lesions were induced by immersion for 96 h in a specially prepared acidic buffer solution (pH 4.2). In specimens of group II (demineralized dentin), no further treatment was done. For group III remineralization was induced by immersion in 3% eggshell powder solution for 12 min and incubated at 37° twice daily with 12 h intervals between both immersions for seven consecutive days. Light curing resin composite cylinders with universal bonding agent were formed with the aid of polymer tubes (4 mm diameter 4 mm height). All specimens were thermo-cycled for 500 cycles from 5 to 55°C. Shear bond strength test was done using universal testing machine with crosshead speed of 0.5 mm/min until failure occurred. Analysis of mode of failure was done by examining fractured surfaces of debonded specimens under stereomicroscope. Results Group I (normal sound dentin) recoded a significant highest mean value of shear bond strength at 19.38 ± 5.22 MPa followed by group III (remineralized dentin) at 12.94 ± 3.03 MPa which is statically significant higher mean shear bond strength value than group II (demineralized dentin) which recorded mean shear bond at 8.98 ± 3.32. Statistically significant difference was found when comparing mode of failure between three groups; group I showed the highest number of cohesive and mixed failures followed by group III, while group II showed no cohesive failures. Overall, more pronounced adhesive and mixed failures were found regardless of grouping also strong positive significant relation between mode of failure and shear bond strength (maximum load) was found. Conclusion Shear bond strength of composite resin to specimens treated with CESPS showed increase in bond strength values. Treated remineralized specimens with CESPS showed significantly higher number of cohesive/mixed modes of failure compared to demineralized specimens.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"39 1","pages":"187 - 196"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85882966","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}
Introduction It has been demonstrated that the use of skeletal anchoring devices for maxillary protraction is a potential method for treating growing patients with class III malocclusion caused by maxillary retrognathism. The aim was to compare the skeletal and dentoalveolar effects of maxillary skeletal expander and hybrid hyrax facemask combination in the treatment of developing skeletal class III malocclusion. Patients and methods The study comprised 30 developing class III participants randomly selected with maxillary retrognathism in the late mixed or early permanent dentition. In group 1 (n = 10) patients, the maxillary skeletal expander facemask technique was utilized. In group 2 (n = 10) patients, the hybrid hyrax facemask technique was utilized. Group 3 (n = 10) patients, a control with no treatment group. Analysis of pretreatment and posttreatment cephalometric radiographs was used to evaluate skeletal changes. Results The treatment periods for groups 1 and 2 were 8 and 8.5 months, respectively, whereas the untreated control group was followed for 9 months. In comparison to the untreated control group, the maxilla shifted markedly forward in groups 1 and 2 (4.65 mm in group 1 and 3.72 mm in group 2); overjet was improved without proclination of the upper incisors. However, group 2 had more mandibular opening rotation than group 1. Conclusion The two maxillary protraction protocols effectively corrected the significant maxillary deficiency in developing class III patients. However, vertical alterations were better controlled by the maxillary skeletal expander facemask combination (group 1), thus it can be used to treat developing class III patients with a hyperdivergent growth pattern.
已有研究表明，使用骨锚定装置治疗上颌后颌引起的III类错颌畸形是一种潜在的治疗方法。目的是比较上颌骨扩张器和混合hyrax面罩组合治疗骨骼III类错颌畸形的骨骼和牙槽骨效果。患者和方法本研究随机选择30名上颌后颌晚期混合恒牙或早期恒牙的发展中III类患者。第一组(n = 10)患者采用上颌骨扩张器面罩技术。第二组(n = 10)例患者采用杂交hyrax面罩技术。第3组(n = 10)例患者，另设对照组，无治疗组。分析治疗前和治疗后的头颅x线片来评估骨骼变化。结果1、2组治疗时间分别为8、8.5个月，对照组治疗时间为9个月。与未治疗对照组相比，1组和2组的上颌骨明显前移(1组4.65 mm, 2组3.72 mm);在不上切牙前倾的情况下改善了上切牙的覆盖。组2的下颌开口旋转明显多于组1。结论两种上颌拔除方案有效地纠正了发展中III类患者明显的上颌缺损。然而，上颌骨扩张器面罩组合(1组)可以更好地控制垂直改变，因此可以用于治疗生长模式超发散的发展中的III类患者。
{"title":"Comparison between maxillary skeletal expander and hybrid hyrax facemask combination in treatment of growing patients with skeletal class III malocclusion: a randomized clinical trial","authors":"Rehab Ragab, M. el Shennawy, Atia Yousif","doi":"10.4103/tdj.tdj_30_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_30_22","url":null,"abstract":"Introduction It has been demonstrated that the use of skeletal anchoring devices for maxillary protraction is a potential method for treating growing patients with class III malocclusion caused by maxillary retrognathism. The aim was to compare the skeletal and dentoalveolar effects of maxillary skeletal expander and hybrid hyrax facemask combination in the treatment of developing skeletal class III malocclusion. Patients and methods The study comprised 30 developing class III participants randomly selected with maxillary retrognathism in the late mixed or early permanent dentition. In group 1 (n = 10) patients, the maxillary skeletal expander facemask technique was utilized. In group 2 (n = 10) patients, the hybrid hyrax facemask technique was utilized. Group 3 (n = 10) patients, a control with no treatment group. Analysis of pretreatment and posttreatment cephalometric radiographs was used to evaluate skeletal changes. Results The treatment periods for groups 1 and 2 were 8 and 8.5 months, respectively, whereas the untreated control group was followed for 9 months. In comparison to the untreated control group, the maxilla shifted markedly forward in groups 1 and 2 (4.65 mm in group 1 and 3.72 mm in group 2); overjet was improved without proclination of the upper incisors. However, group 2 had more mandibular opening rotation than group 1. Conclusion The two maxillary protraction protocols effectively corrected the significant maxillary deficiency in developing class III patients. However, vertical alterations were better controlled by the maxillary skeletal expander facemask combination (group 1), thus it can be used to treat developing class III patients with a hyperdivergent growth pattern.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"2 1","pages":"273 - 280"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84830358","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/Objectives The aim of this study was conducted to evaluate the effect of NaOH alkaline treatment on wettability and bioactivity of some commercial dental implants. Background The surface of titanium dental implants plays an important role in their success. Wettability is one of the crucial surface characteristics for osseointegration. Methods In this study, three commercial titanium dental implants are grouped by their types into 3 groups (n=10). Each group is divided into 2 subgroups (n=5) according to alkaline treatment. Each experimental specimen is immersed in 5 mL of 5M NaOH solution for 24h at 60°C, then put in an incubator for 24 h to dry at 40°C. All specimens are subjected to surface wettability test through measuring static contact angle (CA) by sessile drop technique and in vitro bioactivity test through immersion into a simulated body fluid (SBF) at 37°C and 7.4p H for 7 days. Then characterized by Scanning Electron Microscope and Energy Dispersive X-ray. Student t-test is used for pair-wise comparisons. The significance level is set at P≤0.05. Results/Conclusions The alkaline surface treatment of Ti dental implants significantly enhances their surface wettability and bioactivity by formation of a porous network structure at a nano scale from sodium titanate hydrogel layer on the surface.
{"title":"Effect of alkaline treatment with sodium hydroxide on wettability and bioactivity of some commercial dental implants: An in-vitro study","authors":"M. Morad, S. El-Safty, Eman M. S. Elbahrawy","doi":"10.4103/tdj.tdj_20_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_20_22","url":null,"abstract":"Aim/Objectives The aim of this study was conducted to evaluate the effect of NaOH alkaline treatment on wettability and bioactivity of some commercial dental implants. Background The surface of titanium dental implants plays an important role in their success. Wettability is one of the crucial surface characteristics for osseointegration. Methods In this study, three commercial titanium dental implants are grouped by their types into 3 groups (n=10). Each group is divided into 2 subgroups (n=5) according to alkaline treatment. Each experimental specimen is immersed in 5 mL of 5M NaOH solution for 24h at 60°C, then put in an incubator for 24 h to dry at 40°C. All specimens are subjected to surface wettability test through measuring static contact angle (CA) by sessile drop technique and in vitro bioactivity test through immersion into a simulated body fluid (SBF) at 37°C and 7.4p H for 7 days. Then characterized by Scanning Electron Microscope and Energy Dispersive X-ray. Student t-test is used for pair-wise comparisons. The significance level is set at P≤0.05. Results/Conclusions The alkaline surface treatment of Ti dental implants significantly enhances their surface wettability and bioactivity by formation of a porous network structure at a nano scale from sodium titanate hydrogel layer on the surface.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"83 1","pages":"140 - 145"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84018343","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}
For successful clinical outcomes in endodontics, a thorough knowledge of root canal morphology, adequate clinical and radiographic assessment, and the use of newer diagnostic aids are required. This case report describes the diagnosis and endodontic management of a three-rooted left maxillary first molar which had three roots and seven canals (MB1, MB2, MB3, DB1, DB2, MP, and DP). This unusual morphology of the maxillary first molar was confirmed using a cone-beam computed tomography scan. This article discusses the morphology of the maxillary first molar and how to successfully diagnose and negotiate the extra canals using the most up-to-date techniques.
{"title":"Root canal therapy of maxillary first molar with seven canals diagnosed using cone beam computed tomography – a case report","authors":"Saini Rashmi, S. Kumar","doi":"10.4103/tdj.tdj_3_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_3_22","url":null,"abstract":"For successful clinical outcomes in endodontics, a thorough knowledge of root canal morphology, adequate clinical and radiographic assessment, and the use of newer diagnostic aids are required. This case report describes the diagnosis and endodontic management of a three-rooted left maxillary first molar which had three roots and seven canals (MB1, MB2, MB3, DB1, DB2, MP, and DP). This unusual morphology of the maxillary first molar was confirmed using a cone-beam computed tomography scan. This article discusses the morphology of the maxillary first molar and how to successfully diagnose and negotiate the extra canals using the most up-to-date techniques.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"19 1","pages":"169 - 171"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82245928","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 and aim Treatment of mandibular edentulous ridge with all-on-four treatment concept is a reliable choice. However, the framework material may affect the stresses transmitted to the implant and bone. The aim of the study was to compare stresses transferred to implant–bone interface on using glass fiber-reinforced composite (GFRC), zirconia (Zr), titanium (Ti) and poly-ether-ether-ketone (PEEK) as framework materials. Patients and methods Three-dimensional finite element model of completely edentulous mandible restored with four implants (two axial anterior implants and two posterior implants 30° distally tilted) connected with a framework of different materials (Zr, Ti, GFRC, and PEEK) was constructed. A unilateral axial load of 250 N was applied at the distal end of the cantilever and the resultant von Mises stresses at implant–bone interface were calculated. Results The lowest von Mises stresses at implant/crestal bone area was recorded with Zr framework followed by Ti then GFRC while the highest von Mises stresses were recorded with PEEK framework. Conclusions Within the limitations of this study, it could be concluded that the stiffer framework material transmits more stresses to the implants. The stress distribution of GFRC, as a framework material, is better than PEEK.
{"title":"Effect of different framework materials on stresses induced at the implant/bone interface in all-on-four implant treatment concept: three-dimensional finite element analysis","authors":"A. Sayed, Ibrahim Anwar Abdelazim","doi":"10.4103/tdj.tdj_10_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_10_22","url":null,"abstract":"Background and aim Treatment of mandibular edentulous ridge with all-on-four treatment concept is a reliable choice. However, the framework material may affect the stresses transmitted to the implant and bone. The aim of the study was to compare stresses transferred to implant–bone interface on using glass fiber-reinforced composite (GFRC), zirconia (Zr), titanium (Ti) and poly-ether-ether-ketone (PEEK) as framework materials. Patients and methods Three-dimensional finite element model of completely edentulous mandible restored with four implants (two axial anterior implants and two posterior implants 30° distally tilted) connected with a framework of different materials (Zr, Ti, GFRC, and PEEK) was constructed. A unilateral axial load of 250 N was applied at the distal end of the cantilever and the resultant von Mises stresses at implant–bone interface were calculated. Results The lowest von Mises stresses at implant/crestal bone area was recorded with Zr framework followed by Ti then GFRC while the highest von Mises stresses were recorded with PEEK framework. Conclusions Within the limitations of this study, it could be concluded that the stiffer framework material transmits more stresses to the implants. The stress distribution of GFRC, as a framework material, is better than PEEK.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"94 1","pages":"105 - 109"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91066931","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}
Cone-beam computed tomography (CBCT), a modern technology in three-dimensional imaging has gained wide acceptance in the field of endodontics. Treatment strategies and surgical guidance have both benefited from this strategy. By the use of conventional periapical radiographs sometime the intraoral localization of root apex is found to be difficult and it is inescapable to prevent significant amount of bone removal. Moreover, the duration of retraction of gingival flap increases and more amount of alveolar bone removal are usually required, leading to prolonged time of surgery. The more intraoperative time, the higher are the chances of postoperative pain, discomfort and even leads to increase risk of infection. The combination of intraoral or extraoral scan and CBCT provides favorable treatment outcomes. Leveraging CBCT, computer-aided design, and three-dimensional printing technology, this case report discusses a method of periapical surgery using a surgical template for guided osteotomy and root resection of the maxillary central incisor.
{"title":"Guided osteotomy: A conservative method for periapical surgery with the aid of cone-beam computed tomography and three-dimensional printing technology","authors":"Saini Rashmi, Saini Kr","doi":"10.4103/tdj.tdj_8_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_8_22","url":null,"abstract":"Cone-beam computed tomography (CBCT), a modern technology in three-dimensional imaging has gained wide acceptance in the field of endodontics. Treatment strategies and surgical guidance have both benefited from this strategy. By the use of conventional periapical radiographs sometime the intraoral localization of root apex is found to be difficult and it is inescapable to prevent significant amount of bone removal. Moreover, the duration of retraction of gingival flap increases and more amount of alveolar bone removal are usually required, leading to prolonged time of surgery. The more intraoperative time, the higher are the chances of postoperative pain, discomfort and even leads to increase risk of infection. The combination of intraoral or extraoral scan and CBCT provides favorable treatment outcomes. Leveraging CBCT, computer-aided design, and three-dimensional printing technology, this case report discusses a method of periapical surgery using a surgical template for guided osteotomy and root resection of the maxillary central incisor.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"82 1","pages":"172 - 176"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77127578","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}
Samaa Mahmoud Abdallah, Fatma El Hendawy, Ahmed El Dosoky
Background Early childhood caries (ECC) is considered one of the most prevalent diseases in young children. It is a public health problem with oral and general consequences that adversely affects the quality of child life. This study aimed to determine the prevalence of ECC among preschool aged children in Gharbia Governorate and its related risk factors. Patients and methods A cross-sectional study conducted among 2700 Egyptian children 3–6 years old, a stratified cluster sampling methods was utilized to choose the enrolled children, a consent and a self-administered questionnaire about sociodemographic characteristics, dental service, dietary and oral hygiene behaviors applied to parents before the dental examination. The study approved by Research Ethics Committee at Faculty of Dentistry, Tanta University. Results The prevalence of ECC among preschool aged children in Gharbia Governorate was (68.5%), it was higher in older children and in rural areas. Data revealed associations between prevalence of ECC and sex, mother education and family income. As well using bottle at bed time and drinking soda or juice were significant factors. Brushing frequency especially at bed time, parent believes about the important of brushing their children teeth also were significant factors. Conclusions This study showed high prevalence of ECC in the study population. ECC prevalence was associated with age, sex, family socioeconomic status, drinking soda or juice, night bottle feeding and teeth brushing. Results reveal the need for new preventive strategies to increase awareness about ECC, promoting good oral hygiene practices and enhancing mothers' knowledge of oral health.
{"title":"Prevalence of early childhood caries and associated factors among a group of preschool children in El-Gharbia Governorate","authors":"Samaa Mahmoud Abdallah, Fatma El Hendawy, Ahmed El Dosoky","doi":"10.4103/tdj.tdj_12_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_12_22","url":null,"abstract":"Background Early childhood caries (ECC) is considered one of the most prevalent diseases in young children. It is a public health problem with oral and general consequences that adversely affects the quality of child life. This study aimed to determine the prevalence of ECC among preschool aged children in Gharbia Governorate and its related risk factors. Patients and methods A cross-sectional study conducted among 2700 Egyptian children 3–6 years old, a stratified cluster sampling methods was utilized to choose the enrolled children, a consent and a self-administered questionnaire about sociodemographic characteristics, dental service, dietary and oral hygiene behaviors applied to parents before the dental examination. The study approved by Research Ethics Committee at Faculty of Dentistry, Tanta University. Results The prevalence of ECC among preschool aged children in Gharbia Governorate was (68.5%), it was higher in older children and in rural areas. Data revealed associations between prevalence of ECC and sex, mother education and family income. As well using bottle at bed time and drinking soda or juice were significant factors. Brushing frequency especially at bed time, parent believes about the important of brushing their children teeth also were significant factors. Conclusions This study showed high prevalence of ECC in the study population. ECC prevalence was associated with age, sex, family socioeconomic status, drinking soda or juice, night bottle feeding and teeth brushing. Results reveal the need for new preventive strategies to increase awareness about ECC, promoting good oral hygiene practices and enhancing mothers' knowledge of oral health.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"11 1","pages":"157 - 168"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74030071","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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