Oral submucous fibrosis (OSMF) is a potentially malignant condition mainly found in people of Indian subcontinent. Although, mainly adults affected with OSMF have been seen in literature, but its incidence is increasing in pediatric population in recent years. The increased trend of habit of chewing the areca nut in children has been associated with this condition. There is paucity of published literature regarding OSMF in pediatric age group. Hence, the current article presents a case report of OSMF in an 8.5-year-old boy having chronic habit of chewing flavored supari (areca-nut) five to seven packets per day in the last 3 years. Patient was managed by counseling, medicinal treatment and oral physiotherapy. Follow-up evaluation of patient showed the significant reduction in signs and symptoms of OSMF.
{"title":"Oral submucous fibrosis: A rare case in a child and its management","authors":"Mohammad Khan, M. Jindal","doi":"10.4103/tdj.tdj_11_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_11_22","url":null,"abstract":"Oral submucous fibrosis (OSMF) is a potentially malignant condition mainly found in people of Indian subcontinent. Although, mainly adults affected with OSMF have been seen in literature, but its incidence is increasing in pediatric population in recent years. The increased trend of habit of chewing the areca nut in children has been associated with this condition. There is paucity of published literature regarding OSMF in pediatric age group. Hence, the current article presents a case report of OSMF in an 8.5-year-old boy having chronic habit of chewing flavored supari (areca-nut) five to seven packets per day in the last 3 years. Patient was managed by counseling, medicinal treatment and oral physiotherapy. Follow-up evaluation of patient showed the significant reduction in signs and symptoms of OSMF.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"61 1","pages":"177 - 180"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82096495","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 study aims to evaluate the prevalence of dental anomalies and the tendency of dental anomalies among the teeth in Turkey. Patients and methods This retrospective study was designed on panoramic radiographs of randomly selected 4105 patients that applied to Zonguldak Bulent Ecevit University, Faculty of Dentistry. In the study, nine types of dental anomalies were analyzed statistically on the panoramic radiography images of the patients, including one supernumerary teeth, odontoma, congenitally missing teeth, ectopic eruption, rotation, impacted teeth, fusion, dilaceration, and morphological defects. Results The prevalence of a dental anomaly among all evaluated patients was 26.7%. The most common anomaly was found to be congenital missing teeth with a prevalence of 14.2%. Odontoma was found to be the least common anomaly with a prevalence of 01%. Congenital missing teeth were most frequently observed in the mandibular second premolar. Conclusion The prevalence of dental anomalies in the study population was very high. Nine different anomalies were detected and congenitally missing teeth are the most common developmental dental anomaly in the study. The prevalence of dental anomalies may vary and early diagnosis of dental anomalies is important for treatment planning and success.
{"title":"Prevalence of selected dental anomalies in children and adolescents in Turkey","authors":"E. Bodrumlu, F. Tazegül","doi":"10.4103/tdj.tdj_7_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_7_22","url":null,"abstract":"Aim This study aims to evaluate the prevalence of dental anomalies and the tendency of dental anomalies among the teeth in Turkey. Patients and methods This retrospective study was designed on panoramic radiographs of randomly selected 4105 patients that applied to Zonguldak Bulent Ecevit University, Faculty of Dentistry. In the study, nine types of dental anomalies were analyzed statistically on the panoramic radiography images of the patients, including one supernumerary teeth, odontoma, congenitally missing teeth, ectopic eruption, rotation, impacted teeth, fusion, dilaceration, and morphological defects. Results The prevalence of a dental anomaly among all evaluated patients was 26.7%. The most common anomaly was found to be congenital missing teeth with a prevalence of 14.2%. Odontoma was found to be the least common anomaly with a prevalence of 01%. Congenital missing teeth were most frequently observed in the mandibular second premolar. Conclusion The prevalence of dental anomalies in the study population was very high. Nine different anomalies were detected and congenitally missing teeth are the most common developmental dental anomaly in the study. The prevalence of dental anomalies may vary and early diagnosis of dental anomalies is important for treatment planning and success.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"121 1","pages":"153 - 156"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83706125","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 To comparatively evaluate fracture resistance of different techniques for the reattachment of fractured maxillary central incisors. Materials and Methods Sixty intact freshly extracted permanent maxillary central incisors were selected and randomly divided into four groups of 15 each one of control (I) and three experimental groups (II, III, IV) according to the technique of reattachment. The incisal third of the experimental groups were sectioned horizontally. Group I: the teeth were kept intact without sectioning. Group II: an internal dentinal groove (1 mm deep and 1 mm wide). Group III: a pinhole (1.5 mm depth and 1.5 mm diameter). Fractured fragments in group II and group III were reattached using composite resin. Group IV: two vertical grooves (1 mm deep, 1 mm wide, and 4 mm length) with fiber-reinforced composite post (Everstick, GC America). After 24 h of restoration, all samples in each group were then subjected to thermocycling at 5±1 and 55±1°C for 500 cycles each cycle. All the samples were mounted on the universal testing machine (instron). The force was then applied at an angle of 45° of each tooth in a labial to palatal direction at a cross-head speed of 1 mm/min until fractured occurred and the obtained values were subjected to statistical analysis. Results The results showed that the mean fracture resistance of group I was the highest followed by group III, group IV, and group II the least (group II < group IV < group III < group I). Comparing the mean fracture resistance of four groups, analysis of variance showed significantly different fracture resistance among the groups (F = 22.93, P < 0.001). Conclusion No material and technique can restore the strength of intact tooth. However, reattachment techniques can be considered as an alternate method, when the fractured fragment is available with adequate size and appropriately preserved margins.
{"title":"A comparative evaluation of fracture resistance using different techniques for the reattachment of fractured maxillary central incisor – an in vitro study","authors":"Saini Rashmi, S. Kumar","doi":"10.4103/tdj.tdj_4_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_4_22","url":null,"abstract":"Objective To comparatively evaluate fracture resistance of different techniques for the reattachment of fractured maxillary central incisors. Materials and Methods Sixty intact freshly extracted permanent maxillary central incisors were selected and randomly divided into four groups of 15 each one of control (I) and three experimental groups (II, III, IV) according to the technique of reattachment. The incisal third of the experimental groups were sectioned horizontally. Group I: the teeth were kept intact without sectioning. Group II: an internal dentinal groove (1 mm deep and 1 mm wide). Group III: a pinhole (1.5 mm depth and 1.5 mm diameter). Fractured fragments in group II and group III were reattached using composite resin. Group IV: two vertical grooves (1 mm deep, 1 mm wide, and 4 mm length) with fiber-reinforced composite post (Everstick, GC America). After 24 h of restoration, all samples in each group were then subjected to thermocycling at 5±1 and 55±1°C for 500 cycles each cycle. All the samples were mounted on the universal testing machine (instron). The force was then applied at an angle of 45° of each tooth in a labial to palatal direction at a cross-head speed of 1 mm/min until fractured occurred and the obtained values were subjected to statistical analysis. Results The results showed that the mean fracture resistance of group I was the highest followed by group III, group IV, and group II the least (group II < group IV < group III < group I). Comparing the mean fracture resistance of four groups, analysis of variance showed significantly different fracture resistance among the groups (F = 22.93, P < 0.001). Conclusion No material and technique can restore the strength of intact tooth. However, reattachment techniques can be considered as an alternate method, when the fractured fragment is available with adequate size and appropriately preserved margins.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"20 1","pages":"110 - 116"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85606818","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}
Nour Ibrahim Abouelazm, Faten Aboutalb, Azza El-Moneim El-Segai
Purpose Evaluation of trueness and tissue surface adaptation of digital versus conventional mandibular implant-assisted complete overdenture (IACO). Materials and methods Two implants were installed in the inter foraminal region of an epoxy resin model, which was scanned and saved as a Standard Tessellation Language (STL) file. The reference model with the implants was duplicated into 20-stone models. All models were scanned and the STL files were saved for digitally designed 20 IACOs. Half of them were fabricated by three-dimensional (3D) printing technology and considered as group I (the digital group). The other half were fabricated by the conventional pack and press technique and considered as group II (the conventional group). To evaluate the trueness, all IACOs were scanned and superimposed to the STL files of the original design by digital software. By using the same software, the gap between the intaglio surface of the scanned IACOs and the reference model was measured to evaluate the tissue surface adaptation. Results The statistical analysis by using t test revealed a highly significant difference between the two groups with less mean deviation value of the digital group with a P value less than 0.001. There is a significant difference between the two groups with P value of 0.035 at the implant region in the digital group. The overall adaptation between the two groups showed a significant difference with less mean deviation value of the digital group with a P value of 0.041. Conclusion The digital group has better trueness and adaptation than the conventional group. Despite the gap in the implant area in the digital group, the overall fit of the digital group is better. Clinical implications Three-dimensional printing technology can achieve an acceptable fit and good retention. Digital technology and implant dentistry provide great hope for complete edentulism, especially in those with a completely edentulous mandibular arch. Digital implant-assisted complete overdentures showed better fit than conventional ones.
{"title":"Trueness and tissue surface adaptation assessment of digital versus conventional mandibular implant-assisted complete overdenture","authors":"Nour Ibrahim Abouelazm, Faten Aboutalb, Azza El-Moneim El-Segai","doi":"10.4103/tdj.tdj_19_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_19_22","url":null,"abstract":"Purpose Evaluation of trueness and tissue surface adaptation of digital versus conventional mandibular implant-assisted complete overdenture (IACO). Materials and methods Two implants were installed in the inter foraminal region of an epoxy resin model, which was scanned and saved as a Standard Tessellation Language (STL) file. The reference model with the implants was duplicated into 20-stone models. All models were scanned and the STL files were saved for digitally designed 20 IACOs. Half of them were fabricated by three-dimensional (3D) printing technology and considered as group I (the digital group). The other half were fabricated by the conventional pack and press technique and considered as group II (the conventional group). To evaluate the trueness, all IACOs were scanned and superimposed to the STL files of the original design by digital software. By using the same software, the gap between the intaglio surface of the scanned IACOs and the reference model was measured to evaluate the tissue surface adaptation. Results The statistical analysis by using t test revealed a highly significant difference between the two groups with less mean deviation value of the digital group with a P value less than 0.001. There is a significant difference between the two groups with P value of 0.035 at the implant region in the digital group. The overall adaptation between the two groups showed a significant difference with less mean deviation value of the digital group with a P value of 0.041. Conclusion The digital group has better trueness and adaptation than the conventional group. Despite the gap in the implant area in the digital group, the overall fit of the digital group is better. Clinical implications Three-dimensional printing technology can achieve an acceptable fit and good retention. Digital technology and implant dentistry provide great hope for complete edentulism, especially in those with a completely edentulous mandibular arch. Digital implant-assisted complete overdentures showed better fit than conventional ones.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"21 1","pages":"132 - 139"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82733839","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 This study was planned to compare between polyetheretherketone patient-specific implant and prebent titanium mesh in orbital floor reconstruction. Patients and methods Twelve patients with unilateral orbital floor fracture indicated for reconstruction divided in two equal groups according to the type of implant used. Postoperative evaluation was done for 6 months. Patients of both groups were examined clinically for hypoglobus, enophthalmos, ocular motility and diplopia and radiographically for orbital volume measurement preoperatively and postoperatively. A comparative analysis of the treatment outcomes was performed. Results Significant improvement in the external appearance of the eye including hypoglobus, enophthalmos, and ocular motility and diplopia although group II showed one (16.7%) patient with persistent hypoglobus, one (16.7%) patient measured as grade 3 enophthalmos (>2 mm), one (16.7%) patient with marked limitation of ocular motility (grade 3) and diplopia. There was significant improvement in the orbital volume of the affected side in both groups with no significant difference postoperatively between both groups during different follow up periods. There was significant difference between the orbital volume of the affected and nonaffected sides preoperatively and the difference between them was 3.91 ± 0.92 cm3 for group I and 3.64 ± 1.29 cm3 for group II which markedly decreased postoperatively was 0.50 ± 0.72 cm3 for group I and 1.35 ± 0.86 cm3 for group II with no significant difference between affected and nonaffected eyes. Conclusion The results of this study showed that polyetheretherketone patient-specific implant is precise, predictable, and demonstrated higher clinical efficacy in comparison to prebent titanium mesh in orbital floor reconstruction. Preformed prebent titanium mesh is not preferred in large defects.
{"title":"Orbital floor reconstruction using prebent titanium mesh or polyetheretherketone patient-specific implant: Comparative study","authors":"Rafic Beder, M. Breshah, Marwa Ibrahim","doi":"10.4103/tdj.tdj_14_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_14_22","url":null,"abstract":"Purpose This study was planned to compare between polyetheretherketone patient-specific implant and prebent titanium mesh in orbital floor reconstruction. Patients and methods Twelve patients with unilateral orbital floor fracture indicated for reconstruction divided in two equal groups according to the type of implant used. Postoperative evaluation was done for 6 months. Patients of both groups were examined clinically for hypoglobus, enophthalmos, ocular motility and diplopia and radiographically for orbital volume measurement preoperatively and postoperatively. A comparative analysis of the treatment outcomes was performed. Results Significant improvement in the external appearance of the eye including hypoglobus, enophthalmos, and ocular motility and diplopia although group II showed one (16.7%) patient with persistent hypoglobus, one (16.7%) patient measured as grade 3 enophthalmos (>2 mm), one (16.7%) patient with marked limitation of ocular motility (grade 3) and diplopia. There was significant improvement in the orbital volume of the affected side in both groups with no significant difference postoperatively between both groups during different follow up periods. There was significant difference between the orbital volume of the affected and nonaffected sides preoperatively and the difference between them was 3.91 ± 0.92 cm3 for group I and 3.64 ± 1.29 cm3 for group II which markedly decreased postoperatively was 0.50 ± 0.72 cm3 for group I and 1.35 ± 0.86 cm3 for group II with no significant difference between affected and nonaffected eyes. Conclusion The results of this study showed that polyetheretherketone patient-specific implant is precise, predictable, and demonstrated higher clinical efficacy in comparison to prebent titanium mesh in orbital floor reconstruction. Preformed prebent titanium mesh is not preferred in large defects.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"72 1","pages":"146 - 152"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85943569","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 in-vitro study aimed to evaluate the translucency and color stability of bleached veneer shades with different resin cement. Material and Methods Forty-two IPS E-max CAD discs with bleached shades BL1 and BL3 milled by CAD/CAM, each disc was 0.5 mm in thickness, 10 mm in diameter. Each sample had been formed by cementation of IPS E-max CAD discover a PMMA disc 1 mm in thickness 10 mm in diameter with shade A2 by two different shades of resin cement from Variolink NLC shades clear and +2. This cementation done by using standardized mold 1.6 mm in thickness, with cement layer 0.1 mm. Translucency and color of each sample had been measured by Spectrophotometer. Transparent parameter and color difference △E had been calculated and analyzed by one-way analysis of variance then multiple comparison Tukey's test (α = 0.05). Results Using clear shade cement under both shade of IPS E-max showed lower than △E with cement shade +2. P value was highly significant in all samples (ρ> 0.000), while in BL3 disc before cementation and after cementation with clear cement showed nonsignificant result (ρ> 0.227). Transparent parameter was higher before cementation and the lowest value obtained with shade + 2 cement which is opaquer (10.59) with BL3 and (11.69) with BL1. Conclusion The final color and translucency of bleached veneers is influenced by the shade of resin cement.
{"title":"Translucency and color stability of bleached veneer shades with different resin cement","authors":"Mona Abu Saieda, Gaber Masoud, A. Korsel","doi":"10.4103/tdj.tdj_13_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_13_22","url":null,"abstract":"Aim This in-vitro study aimed to evaluate the translucency and color stability of bleached veneer shades with different resin cement. Material and Methods Forty-two IPS E-max CAD discs with bleached shades BL1 and BL3 milled by CAD/CAM, each disc was 0.5 mm in thickness, 10 mm in diameter. Each sample had been formed by cementation of IPS E-max CAD discover a PMMA disc 1 mm in thickness 10 mm in diameter with shade A2 by two different shades of resin cement from Variolink NLC shades clear and +2. This cementation done by using standardized mold 1.6 mm in thickness, with cement layer 0.1 mm. Translucency and color of each sample had been measured by Spectrophotometer. Transparent parameter and color difference △E had been calculated and analyzed by one-way analysis of variance then multiple comparison Tukey's test (α = 0.05). Results Using clear shade cement under both shade of IPS E-max showed lower than △E with cement shade +2. P value was highly significant in all samples (ρ> 0.000), while in BL3 disc before cementation and after cementation with clear cement showed nonsignificant result (ρ> 0.227). Transparent parameter was higher before cementation and the lowest value obtained with shade + 2 cement which is opaquer (10.59) with BL3 and (11.69) with BL1. Conclusion The final color and translucency of bleached veneers is influenced by the shade of resin cement.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"53 1","pages":"117 - 124"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78916196","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 compare the effects of two different cleansing materials on the hardness and surface roughness of conventional and three-dimensional (3D) printed denture base materials. Materials and methods A total of 140 specimens were tested for surface hardness and surface roughness. The samples of each denture base type (n = 70) were randomly divided into seven subgroups each of them = 10 samples. The first subgroup was stored in distilled water. Second, third, and fourth subgroups were immersed for 18, 36, and 54 days in Corega denture cleanser, respectively. Fifth, sixth, and seventh subgroups were immersed for 18, 36, and 54 days in Aloe vera, respectively. Results The roughness of the 3D printed denture base material was significantly lower than that of the conventional denture base material. While the hardness of the 3D printed denture base material was significantly higher than that of the conventional denture base material. For the two types of cleaning agents used, there was a nonsignificant difference in hardness of 3D printed and conventional denture base materials immersed in Corega or Aloe vera. There was a significant difference in the surface roughness of 3D printed and conventional denture base materials immersed in Corega and Aloe vera. Conclusion Within the limitations of this in vitro study, it was concluded that 3D printed denture base material exhibited significantly more favorable surface roughness and hardness compared to the conventional denture base material. Disinfection by immersion using Corega produced higher surface roughness values than using Aloe vera. While Corega and Aloe vera caused nonsignificant damage to the hardness of the conventional and 3D printed denture base materials. Clinical implications Aloe vera gel for disinfecting 3D printed and conventional denture base materials is suggested to maintain a smooth surface of the denture base. Printing denture bases is recommended because of its high hardness and low roughness could be achieved.
{"title":"Effect of two cleansing materials on hardness and surface roughness of conventional and three-dimensional printed denture base materials","authors":"Gehan el-olimy, A. Salem","doi":"10.4103/tdj.tdj_17_22","DOIUrl":"https://doi.org/10.4103/tdj.tdj_17_22","url":null,"abstract":"Aim The aim of this study was to compare the effects of two different cleansing materials on the hardness and surface roughness of conventional and three-dimensional (3D) printed denture base materials. Materials and methods A total of 140 specimens were tested for surface hardness and surface roughness. The samples of each denture base type (n = 70) were randomly divided into seven subgroups each of them = 10 samples. The first subgroup was stored in distilled water. Second, third, and fourth subgroups were immersed for 18, 36, and 54 days in Corega denture cleanser, respectively. Fifth, sixth, and seventh subgroups were immersed for 18, 36, and 54 days in Aloe vera, respectively. Results The roughness of the 3D printed denture base material was significantly lower than that of the conventional denture base material. While the hardness of the 3D printed denture base material was significantly higher than that of the conventional denture base material. For the two types of cleaning agents used, there was a nonsignificant difference in hardness of 3D printed and conventional denture base materials immersed in Corega or Aloe vera. There was a significant difference in the surface roughness of 3D printed and conventional denture base materials immersed in Corega and Aloe vera. Conclusion Within the limitations of this in vitro study, it was concluded that 3D printed denture base material exhibited significantly more favorable surface roughness and hardness compared to the conventional denture base material. Disinfection by immersion using Corega produced higher surface roughness values than using Aloe vera. While Corega and Aloe vera caused nonsignificant damage to the hardness of the conventional and 3D printed denture base materials. Clinical implications Aloe vera gel for disinfecting 3D printed and conventional denture base materials is suggested to maintain a smooth surface of the denture base. Printing denture bases is recommended because of its high hardness and low roughness could be achieved.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"16 1","pages":"125 - 131"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82326424","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 Hyaluronic acid (HLA) occurs naturally in the human body as a key component of the extracellular matrix. Furthering, HLA has a long history of usage in bone regeneration because it can be used as an osteo-promoting materials that can be added to nano-hydroxyapatite particles (HANP) to enhance its osteo-inductive properties. Hence, the purpose of this research was to compare histologically the bone regenerative ability of HLA + HANP versus HANP alone in the treatment of bony defects in rabbit calveria. Materials and methods This trial was conducted on 10 rabbits, where three identical bony defects in calveria were surgically created in each rabbit (with a total of 30 defects), one filled with of HLA + HANP (group I), the other was filled with only HANP (group II) and the third one was left empty as a control (group III). Rabbits were sacrificed at the fourth and eighth weeks postoperatively and samples were collected for histological and histomorphometric analysis. Results All animals survived the experiment successfully and stayed active and alert throughout the study. Both studied groups (I and II) were characterized by greater new bone formation compared to control group. Additionally, the newly formed bone was more evident in association with group I than group II. Conclusion HLA accelerated the initiation of new bone production when coupled with NHAP for bone augmentation in the management of osseous abnormalities.
{"title":"Evaluation of the effectiveness of hyaluronic acid plus nanohydroxyapatite versus nanohydroxyapatite alone on bone regeneration in rabbits","authors":"Sherouk M. Gamal, M. Bilal, Soheir El Kholey","doi":"10.4103/tdj.tdj_32_21","DOIUrl":"https://doi.org/10.4103/tdj.tdj_32_21","url":null,"abstract":"Background Hyaluronic acid (HLA) occurs naturally in the human body as a key component of the extracellular matrix. Furthering, HLA has a long history of usage in bone regeneration because it can be used as an osteo-promoting materials that can be added to nano-hydroxyapatite particles (HANP) to enhance its osteo-inductive properties. Hence, the purpose of this research was to compare histologically the bone regenerative ability of HLA + HANP versus HANP alone in the treatment of bony defects in rabbit calveria. Materials and methods This trial was conducted on 10 rabbits, where three identical bony defects in calveria were surgically created in each rabbit (with a total of 30 defects), one filled with of HLA + HANP (group I), the other was filled with only HANP (group II) and the third one was left empty as a control (group III). Rabbits were sacrificed at the fourth and eighth weeks postoperatively and samples were collected for histological and histomorphometric analysis. Results All animals survived the experiment successfully and stayed active and alert throughout the study. Both studied groups (I and II) were characterized by greater new bone formation compared to control group. Additionally, the newly formed bone was more evident in association with group I than group II. Conclusion HLA accelerated the initiation of new bone production when coupled with NHAP for bone augmentation in the management of osseous abnormalities.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"19 1","pages":"77 - 83"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73386047","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. Ibrahim, Omaima Afifi, S. Ghoneim, Doaa Youssef
Objectives This experimental study was designed to evaluate the effect of titanium dioxide nanoparticles (TiO2NPs) alone or in combination with platelet rich plasma (PRP) on the healing of experimentally created critical-size bony defects in the rabbit's mandible histologically, immunohistochemically using matrix metalloproteinase-9 and vascular endothelial growth factor antibodies and histomorphometrically. Materials and methods Sixteen rabbits were included in the study, where three identical critical-size circular bony defects, two in the right side and one in the left side of the mandible of each rabbit, were created; group I: comprises 16 intraosseous defects (the mesial defect in the right side of the mandible of each rabbit) with no filler, group II: comprises 16 intraosseous defects (the distal defect in the right side of the mandible of each rabbit) filled with TiO2NPs powder mixed with saline, group III: comprises 16 intraosseous defects (the defect in the left side of the mandible of each rabbit) filled with TiO2NPs powder mixed with PRP. Samples were collected from the surgical sites of the experimental defects at 2 and 6 weeks. Results Histologically and histomorphometrically: the amount of newly formed bone was superior and significant in group III when compared with group II and group I at 2 and 6 weeks interval. Immunohistochemically group III showed superior and statistically significant increase in the vascular endothelial growth factor expression levels and matrix metalloproteinase-9 immunolabeling when compared with group II and group I. Conclusion TiO2NPs can be considered a promising material for bone regeneration alone or when combined with PRP.
{"title":"The effect of titanium dioxide nanoparticles with or without platelet rich plasma on the healing of mandibular bony defects in rabbits","authors":"M. Ibrahim, Omaima Afifi, S. Ghoneim, Doaa Youssef","doi":"10.4103/tdj.tdj_29_21","DOIUrl":"https://doi.org/10.4103/tdj.tdj_29_21","url":null,"abstract":"Objectives This experimental study was designed to evaluate the effect of titanium dioxide nanoparticles (TiO2NPs) alone or in combination with platelet rich plasma (PRP) on the healing of experimentally created critical-size bony defects in the rabbit's mandible histologically, immunohistochemically using matrix metalloproteinase-9 and vascular endothelial growth factor antibodies and histomorphometrically. Materials and methods Sixteen rabbits were included in the study, where three identical critical-size circular bony defects, two in the right side and one in the left side of the mandible of each rabbit, were created; group I: comprises 16 intraosseous defects (the mesial defect in the right side of the mandible of each rabbit) with no filler, group II: comprises 16 intraosseous defects (the distal defect in the right side of the mandible of each rabbit) filled with TiO2NPs powder mixed with saline, group III: comprises 16 intraosseous defects (the defect in the left side of the mandible of each rabbit) filled with TiO2NPs powder mixed with PRP. Samples were collected from the surgical sites of the experimental defects at 2 and 6 weeks. Results Histologically and histomorphometrically: the amount of newly formed bone was superior and significant in group III when compared with group II and group I at 2 and 6 weeks interval. Immunohistochemically group III showed superior and statistically significant increase in the vascular endothelial growth factor expression levels and matrix metalloproteinase-9 immunolabeling when compared with group II and group I. Conclusion TiO2NPs can be considered a promising material for bone regeneration alone or when combined with PRP.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"169 1","pages":"68 - 76"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77858777","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 measure translucency of two ceramic materials with different cements and beverages, and compare them to each other. Settings and design In vitro comparative study. Materials and methods One hundred twenty ceramic discs (10 mm diameter, 0.5 mm thickness) from IPS e-max press (n = 60) and Celtra press (n = 60), shade A2 LT were assessed. Two cements [Rely X Ultimate resin cement (RC)] and [Nexus resin-modified glass ionomer cement (RMGIC)] applied to ceramic discs with 0.2 mm thickness through custom-made Teflon mold. Specimens were immersed in two beverages (tea and cola) for 4 h/day for 1 week at room temperature. Translucency parameter (TP) of ceramic discs was measured according to CIE L*a*b* system. Statistical analysis used One-way analysis of variance and Tukey's post-hoc test. Results IPS e-max press showed higher TP values than Celtra press. Discs cemented with RC had higher TP values than those cemented with RMGIC. TP values decreased after immersion in both beverages, with higher TP values to those immersed in cola than those immersed in tea. Conclusion IPS e-max press was more translucent than Celtra press A2 LT discs. RC resin cement could be used to cement veneers with a high final esthetic outcome.
{"title":"Effect of cements and beverages on ceramics translucency","authors":"Monica Micheal, A. Korsel, Fatma A Hasaneen","doi":"10.4103/tdj.tdj_28_21","DOIUrl":"https://doi.org/10.4103/tdj.tdj_28_21","url":null,"abstract":"Aim To measure translucency of two ceramic materials with different cements and beverages, and compare them to each other. Settings and design In vitro comparative study. Materials and methods One hundred twenty ceramic discs (10 mm diameter, 0.5 mm thickness) from IPS e-max press (n = 60) and Celtra press (n = 60), shade A2 LT were assessed. Two cements [Rely X Ultimate resin cement (RC)] and [Nexus resin-modified glass ionomer cement (RMGIC)] applied to ceramic discs with 0.2 mm thickness through custom-made Teflon mold. Specimens were immersed in two beverages (tea and cola) for 4 h/day for 1 week at room temperature. Translucency parameter (TP) of ceramic discs was measured according to CIE L*a*b* system. Statistical analysis used One-way analysis of variance and Tukey's post-hoc test. Results IPS e-max press showed higher TP values than Celtra press. Discs cemented with RC had higher TP values than those cemented with RMGIC. TP values decreased after immersion in both beverages, with higher TP values to those immersed in cola than those immersed in tea. Conclusion IPS e-max press was more translucent than Celtra press A2 LT discs. RC resin cement could be used to cement veneers with a high final esthetic outcome.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"74 1","pages":"57 - 60"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90634477","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：