Pub Date : 2021-06-14DOI: 10.22038/JDMT.2021.53506.1400
S. Mortazavi, A. Yazdi, Gholamhassan Rahmannia
Introduction: The objective of this study was to determine the attitude of dental practitioners towards radiation protection principles and radiographic techniques. We aimed to assess whether dentists’ specialty and university membership impacted the conducts of radiologic practice. Methods: A total of 232 dental offices with intraoral radiographic devices in Mashhad, Iran were randomly selected. Demographic characteristics of dentists as well as radiographic equipment and techniques were recorded. Participants were grouped according to specialty and faculty membership. Chi-square tests were used for statistical analysis and comparison of groups by Statistical Package SPSS v.23. Results: 190 dentists (81.9%) were in general dental practice (GDP) and the remaining 42 (18.1%) worked as specialists in different fields. A significant difference was noted regarding the use of digital sensors between general and specialist dentists (16.8% vs. 35.7%, respectively). Paralleling technique using film holders was employed by 28.6% of specialists and 10% of the general dentists (p<0.05). Half of the specialists used routine thyroid shielding; however, only 28.4% of the GDPs followed this practice (p<0.05). Among the specialists, 19 (45.2%) had faculty membership. Use of a rectangular collimation, long cone, and thyroid shield, except variable exposure time were more common in non-faculty members, although not significantly different. Conclusion: Although most dentists did not follow the standard radiological guidelines, it was noticeable that specialist dentists used more appropriate radiographic techniques. Attention should be focused on under- and postgraduate education and employing strict policies for dental radiologic safety measures.
{"title":"Attitude of General and Specialist Dental practitioners towards Radiation Safety Principles","authors":"S. Mortazavi, A. Yazdi, Gholamhassan Rahmannia","doi":"10.22038/JDMT.2021.53506.1400","DOIUrl":"https://doi.org/10.22038/JDMT.2021.53506.1400","url":null,"abstract":"Introduction: The objective of this study was to determine the attitude of dental practitioners towards radiation protection principles and radiographic techniques. We aimed to assess whether dentists’ specialty and university membership impacted the conducts of radiologic practice. Methods: A total of 232 dental offices with intraoral radiographic devices in Mashhad, Iran were randomly selected. Demographic characteristics of dentists as well as radiographic equipment and techniques were recorded. Participants were grouped according to specialty and faculty membership. Chi-square tests were used for statistical analysis and comparison of groups by Statistical Package SPSS v.23. Results: 190 dentists (81.9%) were in general dental practice (GDP) and the remaining 42 (18.1%) worked as specialists in different fields. A significant difference was noted regarding the use of digital sensors between general and specialist dentists (16.8% vs. 35.7%, respectively). Paralleling technique using film holders was employed by 28.6% of specialists and 10% of the general dentists (p<0.05). Half of the specialists used routine thyroid shielding; however, only 28.4% of the GDPs followed this practice (p<0.05). Among the specialists, 19 (45.2%) had faculty membership. Use of a rectangular collimation, long cone, and thyroid shield, except variable exposure time were more common in non-faculty members, although not significantly different. Conclusion: Although most dentists did not follow the standard radiological guidelines, it was noticeable that specialist dentists used more appropriate radiographic techniques. Attention should be focused on under- and postgraduate education and employing strict policies for dental radiologic safety measures.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"79 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80863824","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}
Pub Date : 2021-06-01DOI: 10.22038/JDMT.2021.57532.1442
Z. Mohammadzadeh, Hamideh Sadat Mohammadipoor, F. Khorakian
Introduction: Restoration of freshly erupted permanent first molars with extensive caries is a challenge in pediatric dentistry. This study aimed to compare the fracture resistance of permanent molars with undermined walls restored with amalgam and composite resin along with cusp reduction, reinforcement of the walls with glass ionomer (GI) or no further intervention. Methods: This experimental in-vitro study evaluated 72 freshly extracted sound human third molars with almost equal dimensions. After cavity preparation, the teeth were then randomly divided into three groups. In group 1, the undermined area was reinforced with light-cure GI. Group 2 received a 2 mm cuspal cap, and group 3 received no intervention. Half of the teeth in each group were restored with composite resin and the other half with amalgam. The teeth then underwent thermocycling and their fracture resistance was measured by a universal testing machine. Data were analyzed using two-way ANOVA. Results: No significant difference was noted in fracture resistance among three procedures in teeth restored with composite (P=0.589). However, this difference was significant in teeth restored with amalgam (P=0.001). Conclusion: The current results indicated when esthetics is not a priority, applying amalgam restorations with GI-reinforced undermined walls might be suitable for restoration of freshly erupted permanent first molars with extensive caries.
{"title":"In Vitro Fracture Resistance of Permanent Molars with Undermined Walls Restored With Different Materials and Techniques","authors":"Z. Mohammadzadeh, Hamideh Sadat Mohammadipoor, F. Khorakian","doi":"10.22038/JDMT.2021.57532.1442","DOIUrl":"https://doi.org/10.22038/JDMT.2021.57532.1442","url":null,"abstract":"Introduction: Restoration of freshly erupted permanent first molars with extensive caries is a challenge in pediatric dentistry. This study aimed to compare the fracture resistance of permanent molars with undermined walls restored with amalgam and composite resin along with cusp reduction, reinforcement of the walls with glass ionomer (GI) or no further intervention. Methods: This experimental in-vitro study evaluated 72 freshly extracted sound human third molars with almost equal dimensions. After cavity preparation, the teeth were then randomly divided into three groups. In group 1, the undermined area was reinforced with light-cure GI. Group 2 received a 2 mm cuspal cap, and group 3 received no intervention. Half of the teeth in each group were restored with composite resin and the other half with amalgam. The teeth then underwent thermocycling and their fracture resistance was measured by a universal testing machine. Data were analyzed using two-way ANOVA. Results: No significant difference was noted in fracture resistance among three procedures in teeth restored with composite (P=0.589). However, this difference was significant in teeth restored with amalgam (P=0.001). Conclusion: The current results indicated when esthetics is not a priority, applying amalgam restorations with GI-reinforced undermined walls might be suitable for restoration of freshly erupted permanent first molars with extensive caries.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"4 7 1","pages":"114-120"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83821796","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}
Pub Date : 2021-06-01DOI: 10.22038/JDMT.2021.44814.1331
Salmerón-Valdés Elias Nahum, Scougall Vilchis Rogelio Jose, Lara-Carrillo Edith, Toral-Rizo Victor Hugo, Velasquez-Enriquez Ulises, Morales-Valenzuela Adriana Alejandra
Introduction: Fluoride varnishes are used for caries prevention and treatment of dentin hypersensitivity, and its main purpose is to prolong the contact time between fluoride and tooth. The present study aimed to compare the amount of fluoride released and recharge from three conventional varnishes with resin-modified glass ionomer (RMGI). Methods: This experimental in vitro study was carried on blocks of human teeth extracted for orthodontic reasons. Three commercially available fluoride varnishes (Fluor protector (FP), Duraphat (DP), Clinpro White Varnish (CWV)) a Giomer (PRG-Barrier Coat), and an RMGI (Clinpro XT) were applied in these blocks, divided into five groups (eight samples each one). The readings were carried out using an ion-selective electrode and a potentiometer. After 30 days of study, the recharge capacity of these materials was evaluated immersing the samples in 20,000 parts per million (ppm) sodium fluoride gel. Results: Significant differences were found when comparing FP with the rest of the materials analyzed in this study since it released the lowest amount of fluoride with 1.01 ppm. The Giomer released 1.90 ppm, whereas CWV and DP released the highest amount of fluoride with 5.41 ppm and 4.76 ppm, respectively. The RMGI was more constant during the first five days and demonstrated a greater recharge capacity. Conclusion: All varnishes demonstrated the greatest fluoride release during the first 24 h, and a marked decrease was observed after this period. The RMGI presented a considerable amount of fluoride and the best capacity for recharge.
{"title":"Fluoride Release and Recharge in Conventional Varnishes, Compared to a Giomer and a Resin Modified Glass Ionomer","authors":"Salmerón-Valdés Elias Nahum, Scougall Vilchis Rogelio Jose, Lara-Carrillo Edith, Toral-Rizo Victor Hugo, Velasquez-Enriquez Ulises, Morales-Valenzuela Adriana Alejandra","doi":"10.22038/JDMT.2021.44814.1331","DOIUrl":"https://doi.org/10.22038/JDMT.2021.44814.1331","url":null,"abstract":"Introduction: Fluoride varnishes are used for caries prevention and treatment of dentin hypersensitivity, and its main purpose is to prolong the contact time between fluoride and tooth. The present study aimed to compare the amount of fluoride released and recharge from three conventional varnishes with resin-modified glass ionomer (RMGI). Methods: This experimental in vitro study was carried on blocks of human teeth extracted for orthodontic reasons. Three commercially available fluoride varnishes (Fluor protector (FP), Duraphat (DP), Clinpro White Varnish (CWV)) a Giomer (PRG-Barrier Coat), and an RMGI (Clinpro XT) were applied in these blocks, divided into five groups (eight samples each one). The readings were carried out using an ion-selective electrode and a potentiometer. After 30 days of study, the recharge capacity of these materials was evaluated immersing the samples in 20,000 parts per million (ppm) sodium fluoride gel. Results: Significant differences were found when comparing FP with the rest of the materials analyzed in this study since it released the lowest amount of fluoride with 1.01 ppm. The Giomer released 1.90 ppm, whereas CWV and DP released the highest amount of fluoride with 5.41 ppm and 4.76 ppm, respectively. The RMGI was more constant during the first five days and demonstrated a greater recharge capacity. Conclusion: All varnishes demonstrated the greatest fluoride release during the first 24 h, and a marked decrease was observed after this period. The RMGI presented a considerable amount of fluoride and the best capacity for recharge.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"1 1","pages":"62-70"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91038913","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}
Pub Date : 2021-06-01DOI: 10.22038/JDMT.2021.56500.1436
M. Elsadat, Ashraf S. Refai, Taher M. Islam
Introduction: This study was directed to evaluate the effect of different operating temperatures on the change in working length when using the XP-endo shaper file. Methods: A total of 20 plastic blocks with16 mm curved canals were used in this study. The working length was adjusted to be 15 mm using a customized Teflon stopper (10mm in length) which was used with all files in the study. The preparation was done using the XP-endo shaper file (FKG, La Chaux-de-Fonds, Switzerland) according to the manufacturer’s instructions. The blocks were divided into 2 groups: Group 1: body temperature, Group 2: room temperature. Pre and post instrumentation imaging of the blocks was done using the stereomicroscopy at 8x. The images were superimposed to create a composite image on which the evaluation of working length change was done. Mann-Whitney U test was used to compare the change in working length in the two groups. Results: There was no statistically significant difference between the two groups (P ≤ 0.05). Conclusions: Within the parameters of this study, although both groups showed an increase in working length when using the XP-endo shaper file, the operating temperature did not have an effect.
简介:本研究旨在评估使用XP-endo成形锉时不同操作温度对工作长度变化的影响。方法:采用20个塑料块，16 mm弯曲管。使用定制的特氟龙塞(长度为10mm)将工作长度调整为15mm，该塞用于研究中的所有锉刀。根据制造商的说明，使用XP-endo成形锉(FKG, La Chaux-de-Fonds，瑞士)完成准备工作。将积木分为两组:第一组:体温，第二组:室温。使用8倍体视显微镜对块体进行前后仪器成像。将图像叠加成复合图像，并对其进行工作长度变化的评价。采用Mann-Whitney U检验比较两组工作时长的变化。结果:两组比较差异无统计学意义(P≤0.05)。结论:在本研究的参数范围内，虽然两组在使用XP-endo塑形锉时均表现出工作长度的增加，但操作温度没有影响。
{"title":"Does The Working Length Change When Using The XP-Endo Shaper File at Different Operating Temperatures?","authors":"M. Elsadat, Ashraf S. Refai, Taher M. Islam","doi":"10.22038/JDMT.2021.56500.1436","DOIUrl":"https://doi.org/10.22038/JDMT.2021.56500.1436","url":null,"abstract":"Introduction: This study was directed to evaluate the effect of different operating temperatures on the change in working length when using the XP-endo shaper file. Methods: A total of 20 plastic blocks with16 mm curved canals were used in this study. The working length was adjusted to be 15 mm using a customized Teflon stopper (10mm in length) which was used with all files in the study. The preparation was done using the XP-endo shaper file (FKG, La Chaux-de-Fonds, Switzerland) according to the manufacturer’s instructions. The blocks were divided into 2 groups: Group 1: body temperature, Group 2: room temperature. Pre and post instrumentation imaging of the blocks was done using the stereomicroscopy at 8x. The images were superimposed to create a composite image on which the evaluation of working length change was done. Mann-Whitney U test was used to compare the change in working length in the two groups. Results: There was no statistically significant difference between the two groups (P ≤ 0.05). Conclusions: Within the parameters of this study, although both groups showed an increase in working length when using the XP-endo shaper file, the operating temperature did not have an effect.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"3 1","pages":"108-113"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75832290","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}
Pub Date : 2021-06-01DOI: 10.22038/JDMT.2021.54641.1414
H. Khorshidi, Shahab Honar, S. Raoofi, N. Azarpira
Introduction: Silicate-based cement alone and Hydroxyapatite as bone filling materials lead to successful results in implant dentistry and regenerative medicine. The purpose of this study was to compare the adhesion capability of periodontal ligament fibroblast cells (PDLFC) to the Nanohydroxyapatite silicate-based cement and silicate-based cement alone in vitro. Methods: Primary cell cultures of PDLFCs were obtained from clinically healthy third molars teeth. These third molars were either extracted for orthodontic reasons or extracted due to the impaction of teeth. Cells subcultured at a density of 10000 cells/well in 24-well plates. Methyl-tetrazolium bromide (MTT) assay was performed to evaluate the survival and proliferation of fibroblasts on 24h, 72h, and 1week after the cell culture. Scanning Electron Microscopy (SEM) analysis was used to examine the morphology of PDLFCs on the two scaffolds. Results: Cells were found growing in close proximity to both minerals but in terms of fibroblast cell attachment. Adding Nanohydroxyapatite did not improve cellular proliferation and silicate-based cement alone showed superior cellular proliferation in 72 hours. After 24h and 1week both minerals showed the same response. Conclusion: Although both Nanohydroxyapatite silicate-based cement and silicate-based cement alone are biocompatible, but nanohydroxyapatite silicate-based cement did not show improved biological activities when compared with silicate-based cement.
{"title":"Comparing the Adhesion Capability of Periodontal Ligament Fibroblast Cells to Nano-hydroxyapatite Silicate-Based Cement and Silicate-Based Cement Alone","authors":"H. Khorshidi, Shahab Honar, S. Raoofi, N. Azarpira","doi":"10.22038/JDMT.2021.54641.1414","DOIUrl":"https://doi.org/10.22038/JDMT.2021.54641.1414","url":null,"abstract":"Introduction: Silicate-based cement alone and Hydroxyapatite as bone filling materials lead to successful results in implant dentistry and regenerative medicine. The purpose of this study was to compare the adhesion capability of periodontal ligament fibroblast cells (PDLFC) to the Nanohydroxyapatite silicate-based cement and silicate-based cement alone in vitro. Methods: Primary cell cultures of PDLFCs were obtained from clinically healthy third molars teeth. These third molars were either extracted for orthodontic reasons or extracted due to the impaction of teeth. Cells subcultured at a density of 10000 cells/well in 24-well plates. Methyl-tetrazolium bromide (MTT) assay was performed to evaluate the survival and proliferation of fibroblasts on 24h, 72h, and 1week after the cell culture. Scanning Electron Microscopy (SEM) analysis was used to examine the morphology of PDLFCs on the two scaffolds. Results: Cells were found growing in close proximity to both minerals but in terms of fibroblast cell attachment. Adding Nanohydroxyapatite did not improve cellular proliferation and silicate-based cement alone showed superior cellular proliferation in 72 hours. After 24h and 1week both minerals showed the same response. Conclusion: Although both Nanohydroxyapatite silicate-based cement and silicate-based cement alone are biocompatible, but nanohydroxyapatite silicate-based cement did not show improved biological activities when compared with silicate-based cement.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"33 11 1","pages":"79-86"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87584108","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}
Pub Date : 2021-06-01DOI: 10.22038/JDMT.2021.55209.1420
I. Parisay, M. Talebi, Shamime Asadi, Ali Sharif moghadam, Mohammad Nikbakht
Introduction: The success of the endodontic treatment is closely associated with eliminating endodontic microbiota especially bacteria like Enterococcus Faecalis (E. Faecalis). Irrigation solutions are suggested for this purpose but there are contraries regarding irrigations and their concentrations. This study aimed to compare antibacterial efficacy of irrigations including 2.5% Sodium hypochlorite (NaOCl), 2% Chlorhexidine (CHX), and 1.5% Hydrogen peroxide (H2O2). Methods: Fifty deciduous human extracted teeth were divided into 3 groups of 15 teeth, 2.5% NaOCl, 2% CHX, 1.5% H2O2, and 5 teeth in the negative control group. Later, root canals were inoculated by E. Faecalis. After cleaning and shaping, we irrigated the root canals of the teeth in each group with NaOCl, CHX, and H2O2. Samples were obtained again and sent for microbiological evaluation. Wilcoxon signed-rank test, Paired sample T-test, and Kruskal–Wallis were used to analyze data. Results: All 3 groups showed significant bacterial reduction (p <0.05). NaOCl and CHX showed no significant difference (P=0.415). But the reduction of these 2 groups was higher than H2O2 (p Conclusions: 2.5% NaOCl and 2% Chlorhexidine showed considerable efficacy against E. Faecalis while 1.5% Hydrogen peroxide was not able to eradicate all of E. Faecalis colonies. Hence, NaOCl and CHX solutions can be used for decontamination of infected root canals
{"title":"Antimicrobial Efficacy of 2.5% Sodium Hypochlorite, 2% Chlorhexidine, and 1.5% Hydrogen Peroxide on Enterococcus Faecalis in Pulpectomy of Necrotic Primary Teeth","authors":"I. Parisay, M. Talebi, Shamime Asadi, Ali Sharif moghadam, Mohammad Nikbakht","doi":"10.22038/JDMT.2021.55209.1420","DOIUrl":"https://doi.org/10.22038/JDMT.2021.55209.1420","url":null,"abstract":"Introduction: The success of the endodontic treatment is closely associated with eliminating endodontic microbiota especially bacteria like Enterococcus Faecalis (E. Faecalis). Irrigation solutions are suggested for this purpose but there are contraries regarding irrigations and their concentrations. This study aimed to compare antibacterial efficacy of irrigations including 2.5% Sodium hypochlorite (NaOCl), 2% Chlorhexidine (CHX), and 1.5% Hydrogen peroxide (H2O2). Methods: Fifty deciduous human extracted teeth were divided into 3 groups of 15 teeth, 2.5% NaOCl, 2% CHX, 1.5% H2O2, and 5 teeth in the negative control group. Later, root canals were inoculated by E. Faecalis. After cleaning and shaping, we irrigated the root canals of the teeth in each group with NaOCl, CHX, and H2O2. Samples were obtained again and sent for microbiological evaluation. Wilcoxon signed-rank test, Paired sample T-test, and Kruskal–Wallis were used to analyze data. Results: All 3 groups showed significant bacterial reduction (p <0.05). NaOCl and CHX showed no significant difference (P=0.415). But the reduction of these 2 groups was higher than H2O2 (p Conclusions: 2.5% NaOCl and 2% Chlorhexidine showed considerable efficacy against E. Faecalis while 1.5% Hydrogen peroxide was not able to eradicate all of E. Faecalis colonies. Hence, NaOCl and CHX solutions can be used for decontamination of infected root canals","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"20 1","pages":"94-101"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83689965","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}
Pub Date : 2021-05-31DOI: 10.22038/JDMT.2021.55422.1424
Z. Ahangari, M. Naseri, Samin Banihashem, Sara Namjou, L. Eftekhar
Introduction: Propolis is a resinous substance produced by honeybees. Despite antimicrobial properties, tooth discoloration has been reported during its application as intracanal medicament. The aim of this study was to assess the effect of intracanal propolis removal on crown discoloration. Methods: In this experimental study, after access cavity and canal preparation was performed in 40 intact anterior teeth, they were divided into three groups. In group 1 propolis was placed in the canal and pulp chamber while in group 2, it was applied into the canal only. The canals of third group were filled with distilled water as control. After six months, labial surfaces of all teeth were digitally photographed by a digital camera. Propolis was then completely removed and photography was repeated. Tooth color was evaluated in the labial surface using CIE Lab system and Photoshop software. Results: Overall color change (ΔE), change in lightness (ΔL), greenness-redness (Δa) and blueness-yellowness (Δb) were analyzed. ΔL and Δa values were significantly different in all three groups (p <0.001). The difference between groups 1 and 2 was not significant for ΔL or Δa, but groups 1 and 3 were significantly different in ΔL and Δa (p <0.001). Groups 2 and 3 were significantly different in ΔL and Δa (p <0.001). Conclusion: Coronal discoloration after six-month application of propolis as intracanal medicament was not reversed by its removal. Location of application of propolis (in the canal or both canal and pulp chamber) had no significant effect on degree of coronal discoloration.
{"title":"Effect of Propolis Application in Root Canal Therapy for Decontamination; Reversible or Irreversible Coronal Discoloration?","authors":"Z. Ahangari, M. Naseri, Samin Banihashem, Sara Namjou, L. Eftekhar","doi":"10.22038/JDMT.2021.55422.1424","DOIUrl":"https://doi.org/10.22038/JDMT.2021.55422.1424","url":null,"abstract":"Introduction: Propolis is a resinous substance produced by honeybees. Despite antimicrobial properties, tooth discoloration has been reported during its application as intracanal medicament. The aim of this study was to assess the effect of intracanal propolis removal on crown discoloration. Methods: In this experimental study, after access cavity and canal preparation was performed in 40 intact anterior teeth, they were divided into three groups. In group 1 propolis was placed in the canal and pulp chamber while in group 2, it was applied into the canal only. The canals of third group were filled with distilled water as control. After six months, labial surfaces of all teeth were digitally photographed by a digital camera. Propolis was then completely removed and photography was repeated. Tooth color was evaluated in the labial surface using CIE Lab system and Photoshop software. Results: Overall color change (ΔE), change in lightness (ΔL), greenness-redness (Δa) and blueness-yellowness (Δb) were analyzed. ΔL and Δa values were significantly different in all three groups (p <0.001). The difference between groups 1 and 2 was not significant for ΔL or Δa, but groups 1 and 3 were significantly different in ΔL and Δa (p <0.001). Groups 2 and 3 were significantly different in ΔL and Δa (p <0.001). Conclusion: Coronal discoloration after six-month application of propolis as intracanal medicament was not reversed by its removal. Location of application of propolis (in the canal or both canal and pulp chamber) had no significant effect on degree of coronal discoloration.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"2 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77779154","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}
Pub Date : 2021-05-08DOI: 10.22038/JDMT.2021.55126.1418
S. Mousavi, Amirali Zahedinejad, B. Kowsari, Erfan Kolahdouzan, Seyed Iman Mousavi, Sadegh Saeidian
Introduction: Determining working length had always been one of the most crucial factors in evaluating prognosis. Radiography as a gold standard way nowadays has some flaws like making a 3D object, image distortion, not measuring the exact location of apical foramen, and putting the patient in a direct X-ray exposure. Here, we compare these three ways in measuring working length of single canal teeth that are narrow. Methods: Initially thirty single canal teeth with narrow canals were selected. After preparing the access cavity, the teeth were mounted in alginate for measuring working length with an apex locator. After that, they mounted in chalk in order to determine the working length using conventional and digital radiographs. Finally, the teeth were removed from the mount and the exact working length assessed using a hand file to compare with the three mentioned methods. Results: This study showed that the mean measured working length of root canal therapy had a significant difference between the four methods (P=0.003). Bonferroni post hoc test showed that the mean exact working length of root canal therapy was significantly lower than measured working length of root canal therapy by conventional radiography (P=0.002), digital radiography (P=0.001) and Raypex6 apex locator (P=0.01). However, there was no significant difference between these three methods (P>0.05). Conclusion: The results of this study showed that the mean measured working length of root canal therapy had no significant difference between digital radiography, conventional radiography, and Raypex6 apex locator but these three methods had a significant difference with the exact teeth length
{"title":"Comparative Evaluation of Root Canal Working Length Determination with Three Methods: Conventional Radiography, Digital Radiography and Raypex6 Apex Locator: An Experimental Study","authors":"S. Mousavi, Amirali Zahedinejad, B. Kowsari, Erfan Kolahdouzan, Seyed Iman Mousavi, Sadegh Saeidian","doi":"10.22038/JDMT.2021.55126.1418","DOIUrl":"https://doi.org/10.22038/JDMT.2021.55126.1418","url":null,"abstract":"Introduction: Determining working length had always been one of the most crucial factors in evaluating prognosis. Radiography as a gold standard way nowadays has some flaws like making a 3D object, image distortion, not measuring the exact location of apical foramen, and putting the patient in a direct X-ray exposure. Here, we compare these three ways in measuring working length of single canal teeth that are narrow. Methods: Initially thirty single canal teeth with narrow canals were selected. After preparing the access cavity, the teeth were mounted in alginate for measuring working length with an apex locator. After that, they mounted in chalk in order to determine the working length using conventional and digital radiographs. Finally, the teeth were removed from the mount and the exact working length assessed using a hand file to compare with the three mentioned methods. Results: This study showed that the mean measured working length of root canal therapy had a significant difference between the four methods (P=0.003). Bonferroni post hoc test showed that the mean exact working length of root canal therapy was significantly lower than measured working length of root canal therapy by conventional radiography (P=0.002), digital radiography (P=0.001) and Raypex6 apex locator (P=0.01). However, there was no significant difference between these three methods (P>0.05). \u0000Conclusion: The results of this study showed that the mean measured working length of root canal therapy had no significant difference between digital radiography, conventional radiography, and Raypex6 apex locator but these three methods had a significant difference with the exact teeth length","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"61 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87220372","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}
Pub Date : 2021-03-03DOI: 10.22038/JDMT.2021.17642
Khadijeh Abdal, S. M. Mousavi, Meysam Noori, Parisa Kazemi
Introduction: One of the most common maxillofacial malformations is mandibular advancement, a class II malformation or malocclusion. One treatment is mandibular advancement surgery. This research aimed to investigate the effect of mandibular advancement surgery on upper lip length in class II patients. Methods: This retrospective study was conducted with 16 patients having class II malformations who underwent mandibular advancement surgery. Data analysis was conducted using SPSS 19. Results: Results showed that although height of philtrum increased after surgery, there was no significant difference in the height of the philtrum from before to after the mandibular advancement surgery (p > 0.05). Evaluation of the patients showed that although commissure height and vermilion height decreased after surgery, this difference was not statistically different(p > 0.05). However, there was a statistically significant difference between before and after commissure height (p <0.05) at camouflage in patients. There was also a statistically significant difference in height of philtrum and vermilion between before and after camouflage in patients (p <0.05). Conclusions: The results of this study suggest that mandibular advancement surgery plays a serious role in the clinical appearance of lip soft tissue, which can be used as a predictor of patient profile prior to surgery.
{"title":"The Impact of Mandibular Advancement Surgery on Upper Lip Length in Class II Patients","authors":"Khadijeh Abdal, S. M. Mousavi, Meysam Noori, Parisa Kazemi","doi":"10.22038/JDMT.2021.17642","DOIUrl":"https://doi.org/10.22038/JDMT.2021.17642","url":null,"abstract":"Introduction: One of the most common maxillofacial malformations is mandibular advancement, a class II malformation or malocclusion. One treatment is mandibular advancement surgery. This research aimed to investigate the effect of mandibular advancement surgery on upper lip length in class II patients. Methods: This retrospective study was conducted with 16 patients having class II malformations who underwent mandibular advancement surgery. Data analysis was conducted using SPSS 19. Results: Results showed that although height of philtrum increased after surgery, there was no significant difference in the height of the philtrum from before to after the mandibular advancement surgery (p > 0.05). Evaluation of the patients showed that although commissure height and vermilion height decreased after surgery, this difference was not statistically different(p > 0.05). However, there was a statistically significant difference between before and after commissure height (p <0.05) at camouflage in patients. There was also a statistically significant difference in height of philtrum and vermilion between before and after camouflage in patients (p <0.05). Conclusions: The results of this study suggest that mandibular advancement surgery plays a serious role in the clinical appearance of lip soft tissue, which can be used as a predictor of patient profile prior to surgery.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"17 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78903251","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}
Pub Date : 2021-03-01DOI: 10.22038/JDMT.2021.49596.1378
Farzaneh Ostovar Rad, S. Nemati, Z. Yousefi, Nadia Manavi
Introduction: Mental foramen (MF) appearance is quite diverse. Failure to properly diagnose and protect the nerve may result in its damage during medical procedures such as surgery and placement of dental implants. This study evaluated the position of MF and its relationship with gonial angle using cone beam computed tomography (CBCT) images. Methods: 128 gonial angles from 64 CBCT images were measured and divided into low-angle (≤125°) and high-angle (>125°) categories. MF was divided into five types considering its position in cross-sectional profiles: type A (under apex of first premolar); B (under apex of second premolar); C (between first and second premolars); D (anterior to first premolar); and E(posterior to second premolar).The length of mental canal and its buccolingual and superior-inferior position was also evaluated. Independent T-test and Chi-square tests were used with statistical significance set at p Results: The highest frequency of MF position in the high and low-gonial angle categories was type C and the lowest in high-angle and low-angle were type E and D, respectively. The position of the foramen and measurements of the mental canal was not affected by age, gender, or gonial angle (P>0.05). Conclusion: Position of MF was not found to be related to patients’ age, sex, or gonial angles. Since a precise determination of the MF position is difficult due to its different anatomical variations and also because of potential damages during the treatment procedures in this area, radiographic analysis and determining its location among different populations is necessary.
{"title":"Retrospective Evaluation of Position of Mental Foramen and Its Relationship with Gonial Angle Using Cone Beam Computed Tomography","authors":"Farzaneh Ostovar Rad, S. Nemati, Z. Yousefi, Nadia Manavi","doi":"10.22038/JDMT.2021.49596.1378","DOIUrl":"https://doi.org/10.22038/JDMT.2021.49596.1378","url":null,"abstract":"Introduction: Mental foramen (MF) appearance is quite diverse. Failure to properly diagnose and protect the nerve may result in its damage during medical procedures such as surgery and placement of dental implants. This study evaluated the position of MF and its relationship with gonial angle using cone beam computed tomography (CBCT) images. Methods: 128 gonial angles from 64 CBCT images were measured and divided into low-angle (≤125°) and high-angle (>125°) categories. MF was divided into five types considering its position in cross-sectional profiles: type A (under apex of first premolar); B (under apex of second premolar); C (between first and second premolars); D (anterior to first premolar); and E(posterior to second premolar).The length of mental canal and its buccolingual and superior-inferior position was also evaluated. Independent T-test and Chi-square tests were used with statistical significance set at p Results: The highest frequency of MF position in the high and low-gonial angle categories was type C and the lowest in high-angle and low-angle were type E and D, respectively. The position of the foramen and measurements of the mental canal was not affected by age, gender, or gonial angle (P>0.05). Conclusion: Position of MF was not found to be related to patients’ age, sex, or gonial angles. Since a precise determination of the MF position is difficult due to its different anatomical variations and also because of potential damages during the treatment procedures in this area, radiographic analysis and determining its location among different populations is necessary.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"07 1","pages":"44-53"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89705581","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：