Introduction : Saliva contamination is an inevitable and common challenge in the field of restorative dentistry. Recognizing and considering the key time of isolation is an effective strategy to prevent the deleterious effects of salivary contamination. The purpose of this study was to evaluate the effect of salivary contamination in the course of light curing on microshear bond strength and microleakage of a restorative composite resin. Methods: 140 human third molars were divided into seven groups each containing 10 samples for measuring the microleakage and the microshear bond strength. The specimen of each group was contaminated with human saliva at a certain time, while group1 was contaminated in prior to light curing. The samples in groups 2 to 7 were contaminated with saliva at 2, 5, 10, 15, and 20 s after the start of light curing, respectively. The specimens of group7 were light cured and contaminated afterwards with human saliva. Results: According to the gathered results, the time of saliva contamination had significant negative effects on the microshear bond strength to the dentin and enamel in the course of light curing throughout the first 2s and 5s, respectively. It was indicated by the microleacage test that the saliva contamination in the first 2s, 5s, and 10s during light curing had a higher microleakage than the other times. Conclusion: In conclusion, during light curing of the composite resin, the first 10s was high sensitive to saliva contamination and therefore the isolation is very important in this time.
{"title":"Microshear Bond Strength and Microleakage of a Restorative Composite Resin with Salivary Contamination at Different Time Intervals","authors":"Rasoul Sahebalam, Yeganeh Arian, Alireza Boruziniat, Abdolrasoul Rangrazi","doi":"10.22038/JDMT.2021.17657","DOIUrl":"https://doi.org/10.22038/JDMT.2021.17657","url":null,"abstract":"Introduction : Saliva contamination is an inevitable and common challenge in the field of restorative dentistry. Recognizing and considering the key time of isolation is an effective strategy to prevent the deleterious effects of salivary contamination. The purpose of this study was to evaluate the effect of salivary contamination in the course of light curing on microshear bond strength and microleakage of a restorative composite resin. Methods: 140 human third molars were divided into seven groups each containing 10 samples for measuring the microleakage and the microshear bond strength. The specimen of each group was contaminated with human saliva at a certain time, while group1 was contaminated in prior to light curing. The samples in groups 2 to 7 were contaminated with saliva at 2, 5, 10, 15, and 20 s after the start of light curing, respectively. The specimens of group7 were light cured and contaminated afterwards with human saliva. Results: According to the gathered results, the time of saliva contamination had significant negative effects on the microshear bond strength to the dentin and enamel in the course of light curing throughout the first 2s and 5s, respectively. It was indicated by the microleacage test that the saliva contamination in the first 2s, 5s, and 10s during light curing had a higher microleakage than the other times. Conclusion: In conclusion, during light curing of the composite resin, the first 10s was high sensitive to saliva contamination and therefore the isolation is very important in this time.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"51 1","pages":"22-27"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77613381","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.2021.17651
M. Mokhtari, A. Moeintaghavi, H. Arab, Sabete Bagheri Sabzevar
Critical appraisal of research studies is an essential process in quality assessments and development, in which various aspects of a subject are carefully analyzed. In recent decades, many articles have been published in medical journals especially in dental field, without being officially criticized. Citing results of these epidemiological studies requires proper validation. The validation is performed through ‘critical appraisal’ according to standard criteria and checklists. In this paper, 81 studies conducted between 1994 and 2014 in periodontics field in dentistry were divided into five categories: observational studies, diagnostic, clinical, animal, and meta-analysis, and reviewed by STROBE, STARD, CONSORT, ARRIVE, PRISMA Checklists. In most studies, participants' characteristics and inclusion and exclusion criteria were mentioned. In most studies, random sampling was not performed without bias. It is hoped that in future studies, researchers will use standard checklists from the initial stages of the study to obtain valid and scientific results.
{"title":"Critical Appraisal of Studies Conducted in the Department of Periodontics, Mashhad School of Dentistry, in the Last Twenty Years (1994-2014)","authors":"M. Mokhtari, A. Moeintaghavi, H. Arab, Sabete Bagheri Sabzevar","doi":"10.22038/JDMT.2021.17651","DOIUrl":"https://doi.org/10.22038/JDMT.2021.17651","url":null,"abstract":"Critical appraisal of research studies is an essential process in quality assessments and development, in which various aspects of a subject are carefully analyzed. In recent decades, many articles have been published in medical journals especially in dental field, without being officially criticized. Citing results of these epidemiological studies requires proper validation. The validation is performed through ‘critical appraisal’ according to standard criteria and checklists. In this paper, 81 studies conducted between 1994 and 2014 in periodontics field in dentistry were divided into five categories: observational studies, diagnostic, clinical, animal, and meta-analysis, and reviewed by STROBE, STARD, CONSORT, ARRIVE, PRISMA Checklists. In most studies, participants' characteristics and inclusion and exclusion criteria were mentioned. In most studies, random sampling was not performed without bias. It is hoped that in future studies, researchers will use standard checklists from the initial stages of the study to obtain valid and scientific results.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"254 1","pages":"1-15"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86461435","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.2021.17664
A. Eftekhari, A. Bagherpour, H. Jafarzadeh
Introduction: Cone beam computed tomography (CBCT) imaging was developed to provide an improved visual representation of hard dental tissues in three dimensions. This in vitro study aimed to evaluate the morphology of the roots and canals of the mandibular incisors using CBCT. Methods: In total, 100 extracted mandibular central incisors and 100 extracted mandibular lateral incisors were mounted on separate putty blocks, which were completely immobile during imaging. The teeth were imaged using the CBCT unit (kVp=70, mA=8, and exposure time of 12 s). Vertucci’s classification was utilized to record the number of roots and the canals in each root, as well as the type of the canals. Results: Almost all mandibular incisors were single-rooted. Among the mandibular central incisors, the most common canal morphology proved to be type 1 (51%), followed by type 3 (47%). Totally, 2% of the teeth represented type 2 within Vertucci’s classification. Furthermore, mandibular lateral incisors were more varied in terms of anatomical classification. The most common types were recorded as types 3 (55%) and 1 (41%). Moreover, types 6, 2, and 5 comprised 2% of the cases. Conclusion: A high percentage of mandibular incisors have two canals, and based on Vertucci’s classification, the most common anatomies of these teeth were types 1 and 3.
{"title":"Evaluation of the Morphology of Mandibular Incisors using the Cone Beam Computed Tomography","authors":"A. Eftekhari, A. Bagherpour, H. Jafarzadeh","doi":"10.22038/JDMT.2021.17664","DOIUrl":"https://doi.org/10.22038/JDMT.2021.17664","url":null,"abstract":"Introduction: Cone beam computed tomography (CBCT) imaging was developed to provide an improved visual representation of hard dental tissues in three dimensions. This in vitro study aimed to evaluate the morphology of the roots and canals of the mandibular incisors using CBCT. Methods: In total, 100 extracted mandibular central incisors and 100 extracted mandibular lateral incisors were mounted on separate putty blocks, which were completely immobile during imaging. The teeth were imaged using the CBCT unit (kVp=70, mA=8, and exposure time of 12 s). Vertucci’s classification was utilized to record the number of roots and the canals in each root, as well as the type of the canals. Results: Almost all mandibular incisors were single-rooted. Among the mandibular central incisors, the most common canal morphology proved to be type 1 (51%), followed by type 3 (47%). Totally, 2% of the teeth represented type 2 within Vertucci’s classification. Furthermore, mandibular lateral incisors were more varied in terms of anatomical classification. The most common types were recorded as types 3 (55%) and 1 (41%). Moreover, types 6, 2, and 5 comprised 2% of the cases. Conclusion: A high percentage of mandibular incisors have two canals, and based on Vertucci’s classification, the most common anatomies of these teeth were types 1 and 3.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"6 1","pages":"59-61"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89256921","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.2021.17655
Ensieh Grayli, A. Peyvandi, Maysa Mallahi, Shabnam Naeemi, E. Afshari
Introduction: Iatrogenic errors may occur during root canal treatments (RCTs) performed by undergraduate students. The current study explores the iatrogenic errors of RCTs made by undergraduate students at Gorgan School of Dentistry, Golestan, Iran. Methods: This cross-sectional study was conducted using 236 randomly selected treatment records of RCTs performed on first molars by undergraduate dental students. Periapical radiographs were independently explored for the following errors: overfilling, underfilling, legde formation, and apical transportation. Data analysis was performed using Statistical Package for Social Sciences (SPSS) version 17.0, and a Chi-square test at the 0.05 level of significance. Results: Periapical radiographs of 236 endodontically treated first molars were assessed. The results showed that 87.1% of root canals were adequately filled to the working length. Among the teeth treated by fifth- and sixth-year students, 62.5% and 66.4% of teeth were adequately filled to the working length, respectively, resulting in no statistically significant difference (P>0.05). In respect to the prevalence of ledge formation and apical transportation errors, there was no statistical difference either between the treatments performed by fifth- and sixth-year students (P>0.05) or the location of the treated tooth (mandible or maxilla) (P>0.05). Conclusion: Within the limitations of the present study, the results showed a rather low, but non-negligible prevalence of procedural errors in RCTs performed by fifth- and six-year undergraduate students at Gorgan School of Dentistry. Prevalence of errors made by fifth- and six-year students was similar.
{"title":"Radiographic Evaluation of Iatrogenic Errors of Root Canal Treatments Performed in an Undergraduate Dental Clinic","authors":"Ensieh Grayli, A. Peyvandi, Maysa Mallahi, Shabnam Naeemi, E. Afshari","doi":"10.22038/JDMT.2021.17655","DOIUrl":"https://doi.org/10.22038/JDMT.2021.17655","url":null,"abstract":"Introduction: Iatrogenic errors may occur during root canal treatments (RCTs) performed by undergraduate students. The current study explores the iatrogenic errors of RCTs made by undergraduate students at Gorgan School of Dentistry, Golestan, Iran. Methods: This cross-sectional study was conducted using 236 randomly selected treatment records of RCTs performed on first molars by undergraduate dental students. Periapical radiographs were independently explored for the following errors: overfilling, underfilling, legde formation, and apical transportation. Data analysis was performed using Statistical Package for Social Sciences (SPSS) version 17.0, and a Chi-square test at the 0.05 level of significance. Results: Periapical radiographs of 236 endodontically treated first molars were assessed. The results showed that 87.1% of root canals were adequately filled to the working length. Among the teeth treated by fifth- and sixth-year students, 62.5% and 66.4% of teeth were adequately filled to the working length, respectively, resulting in no statistically significant difference (P>0.05). In respect to the prevalence of ledge formation and apical transportation errors, there was no statistical difference either between the treatments performed by fifth- and sixth-year students (P>0.05) or the location of the treated tooth (mandible or maxilla) (P>0.05). Conclusion: Within the limitations of the present study, the results showed a rather low, but non-negligible prevalence of procedural errors in RCTs performed by fifth- and six-year undergraduate students at Gorgan School of Dentistry. Prevalence of errors made by fifth- and six-year students was similar.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"14 1","pages":"16-21"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72512376","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.2021.51819.1393
E. Yıldız, Mehmet Eren Fidan, Buket Dinçer
Introduction: This study compared influence of various irrigation protocols on vertical root fracture resistance of root canal treated teeth. Methods: Forty-eight extracted mandibular premolars were included in the study. The root canals of teeth were instrumented and specimens were allocated into 4 (n = 12) groups according to the irrigation solutions: Group 1: 5% EDTA, 2.5% NaOCl and DW; Group 2: 5% EDTA, 2.5% NaOCl, DW and 2% CHX; Group 3: 5% EDTA, 2.5% NaOCl and 5% Na2S2O3; Group 4: 5% EDTA, 2.5% NaOCl, 5% Na2S2O3 and 2% CHX. Root canals were filled and a load in a vertical direction was applied a week later to specimens. The data were analysed using two-way ANOVA test (P < 0.05). Results: Interaction between using DW or Na2S2O3 and using or not using CHX had a significant effect on fracture resistance to vertical forces (P < 0.001). Irrigation with Na2S2O3 improves fracture resistance to vertical forces when compared to irrigation with DW (P < 0.001). Irrigation with CHX did not affect fracture resistance to vertical forces (P = 0.759). Conclusion: The irrigation solutions statistically affect resistance of root canal treated teeth to vertical fracture forces.
{"title":"Influence of Various Irrigation Protocols on Resistance to Vertical Root Fracture in Root Canal Treated Teeth","authors":"E. Yıldız, Mehmet Eren Fidan, Buket Dinçer","doi":"10.22038/JDMT.2021.51819.1393","DOIUrl":"https://doi.org/10.22038/JDMT.2021.51819.1393","url":null,"abstract":"Introduction: This study compared influence of various irrigation protocols on vertical root fracture resistance of root canal treated teeth. Methods: Forty-eight extracted mandibular premolars were included in the study. The root canals of teeth were instrumented and specimens were allocated into 4 (n = 12) groups according to the irrigation solutions: Group 1: 5% EDTA, 2.5% NaOCl and DW; Group 2: 5% EDTA, 2.5% NaOCl, DW and 2% CHX; Group 3: 5% EDTA, 2.5% NaOCl and 5% Na2S2O3; Group 4: 5% EDTA, 2.5% NaOCl, 5% Na2S2O3 and 2% CHX. Root canals were filled and a load in a vertical direction was applied a week later to specimens. The data were analysed using two-way ANOVA test (P < 0.05). Results: Interaction between using DW or Na2S2O3 and using or not using CHX had a significant effect on fracture resistance to vertical forces (P < 0.001). Irrigation with Na2S2O3 improves fracture resistance to vertical forces when compared to irrigation with DW (P < 0.001). Irrigation with CHX did not affect fracture resistance to vertical forces (P = 0.759). Conclusion: The irrigation solutions statistically affect resistance of root canal treated teeth to vertical fracture forces.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"110 1","pages":"28-33"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74888104","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.2021.51018.1388
H. Mohammadipour, M. Akbari, H. Bagheri, M. Malekmohammadi, Elnaz Karimian, Salehe Sekandari
Introduction: Different surface treatments were preposed to prepare the tooth structure for resin composite bonding. One of the most common preparation is using of phosphoric acid etching. This study conducted to determine the etching effectiveness of a new formulated acid etchant (Exir) and compared it with two commercial products. Methods: To determine the physical properties, the viscosity and shelf life were evaluated by a viscometer and a centrifuge over the time, respectively. SEM micrographs were uesd to show the geometry of bovine enamel and dentin surfaces which were treated by three etchants. The µSBS of composite to treated dental tissues was also investigated. Data were analyzed by ANOVA and Tukey test (α=0.05). Results: Exir etchant showed the lower viscosity compared with two other gels and two-phase separation did not significantly increase during suggested period. The SEM images of enamel samples treated with Exir etchant showed regular etching patterns and less remnant in comparison with other groups. The SEM mages of dentin samples treated with Exir etchant, unlike others, showed wide open dentin tubules with clear exposed collagen fibers. Enamel and dentin µSBS were 30.08±6.79 and 7.29±1.27 for Exir etchant, 23.31±6.64 and 8.49±3.61 for Morva Etch and 23.22±7.05 and 6.16±1.68 for Ultra-Etch, respectivley. The µSBS values for enamel was significantly higher in Exir treated group (P=0.017), while there was no significant difference in dentin µSBS values among three tested etchants (P=0.07). Conclusion: The results of this study showed Exir etchant can provide acceptable results used on dentin and enamel substrates.
{"title":"Evaluation and Comparison of Newly Developed Phosphoric Acid Gel (Exir) with Two Different Common Gels in Iran","authors":"H. Mohammadipour, M. Akbari, H. Bagheri, M. Malekmohammadi, Elnaz Karimian, Salehe Sekandari","doi":"10.22038/JDMT.2021.51018.1388","DOIUrl":"https://doi.org/10.22038/JDMT.2021.51018.1388","url":null,"abstract":"Introduction: Different surface treatments were preposed to prepare the tooth structure for resin composite bonding. One of the most common preparation is using of phosphoric acid etching. This study conducted to determine the etching effectiveness of a new formulated acid etchant (Exir) and compared it with two commercial products. Methods: To determine the physical properties, the viscosity and shelf life were evaluated by a viscometer and a centrifuge over the time, respectively. SEM micrographs were uesd to show the geometry of bovine enamel and dentin surfaces which were treated by three etchants. The µSBS of composite to treated dental tissues was also investigated. Data were analyzed by ANOVA and Tukey test (α=0.05). Results: Exir etchant showed the lower viscosity compared with two other gels and two-phase separation did not significantly increase during suggested period. The SEM images of enamel samples treated with Exir etchant showed regular etching patterns and less remnant in comparison with other groups. The SEM mages of dentin samples treated with Exir etchant, unlike others, showed wide open dentin tubules with clear exposed collagen fibers. Enamel and dentin µSBS were 30.08±6.79 and 7.29±1.27 for Exir etchant, 23.31±6.64 and 8.49±3.61 for Morva Etch and 23.22±7.05 and 6.16±1.68 for Ultra-Etch, respectivley. The µSBS values for enamel was significantly higher in Exir treated group (P=0.017), while there was no significant difference in dentin µSBS values among three tested etchants (P=0.07). Conclusion: The results of this study showed Exir etchant can provide acceptable results used on dentin and enamel substrates.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"30 1","pages":"34-43"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72503161","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 : 2020-12-07DOI: 10.22038/JDMT.2020.45580.1338
Shirin Saravani, Hamideh Kadeh, Shahram Arbabi
Introduction: The incidence of oral and dental lesions increases with age, which can negatively affect the quality of life.The aim of this study was to evaluate the oral and dental status, oral health-related quality of life (OHRQoL), and the associated factors in a population of institutionalized elderly in Southeast Iran. Methods: This cross-sectional study was conducted on 90 institutionalized elderly who were 60 years old or older. Oral examinations were carried out using mirror and probe under proper light. In addition to recording oral lesions, the dental status of the elderly was determined according to the WHO’s criteria. The geriatric oral health assessment index (GOHAI) questionnaire was used to determine OHRQoL. Factors such as age, gender, education, smoking, systemic disease, and the use of denture were recorded for each participant. Data were analyzed by appropriate statistical tests using SPSS software. Results: Forty three percent of the participants had oral conditions. Fissured tongue was the most common oral lesion. The prevalence of oral lesions in females was more than twice that of males (P 0.05). The mean GOHAI in the elderly was 42.8±9.7. Smoking and the presence of oral lesions significantly decreased OHRQoL (P<0.05). Conclusion: The oral and dental status and consequently OHRQol of the elderly were relatively poor. The need for planning to promote the oral and dental health care aiming at improving the quality of life should be emphasized in this region.
{"title":"Oral and Dental Status, Oral Health-Related Quality of Life and Associated Factors among Institutionalized Elderly in Southeast Iran-A Cross Sectional Study","authors":"Shirin Saravani, Hamideh Kadeh, Shahram Arbabi","doi":"10.22038/JDMT.2020.45580.1338","DOIUrl":"https://doi.org/10.22038/JDMT.2020.45580.1338","url":null,"abstract":"Introduction: The incidence of oral and dental lesions increases with age, which can negatively affect the quality of life.The aim of this study was to evaluate the oral and dental status, oral health-related quality of life (OHRQoL), and the associated factors in a population of institutionalized elderly in Southeast Iran. Methods: This cross-sectional study was conducted on 90 institutionalized elderly who were 60 years old or older. Oral examinations were carried out using mirror and probe under proper light. In addition to recording oral lesions, the dental status of the elderly was determined according to the WHO’s criteria. The geriatric oral health assessment index (GOHAI) questionnaire was used to determine OHRQoL. Factors such as age, gender, education, smoking, systemic disease, and the use of denture were recorded for each participant. Data were analyzed by appropriate statistical tests using SPSS software. Results: Forty three percent of the participants had oral conditions. Fissured tongue was the most common oral lesion. The prevalence of oral lesions in females was more than twice that of males (P 0.05). The mean GOHAI in the elderly was 42.8±9.7. Smoking and the presence of oral lesions significantly decreased OHRQoL (P<0.05). Conclusion: The oral and dental status and consequently OHRQol of the elderly were relatively poor. The need for planning to promote the oral and dental health care aiming at improving the quality of life should be emphasized in this region.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"2 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89945525","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 : 2020-12-01DOI: 10.22038/JDMT.2021.48358.1371
A. Bagherpour, N. Anbiaee, Shiva Motaghi, A. Jahanbin
Abstract Introduction: Gender determination can help establishing a biological profile of the human body remains. Since the pelvic and skull remains are the most unyielding parts of human skeleton, identifying the dead bodies from these two parts would be very useful. After coaxial bone, the skull is the most gender-discriminated portion of the human skeleton. Since no determination study have been reported in Iranian population, present study aimed to determine gender by measuring 12 craniomandibular parameters and provide specific discriminant function scores in a selected population in Mashhad, Iran. Methods: a total of 202 digital lateral cephalograms of healthy adults, (101 males and 101 females) in the age range of 18 to 50 years were selected. 14 cephalometric points were utilized, which enabled tracing of 11 linear measurements and an angle. All cephalometric points and measurements were traced by onyxceph® version 2.6 software. Results: Based on the analyses, among the chosen parameters, facial height (N-Me), mandibular ramus height (AR-Go), mandibular plane (Me-Go), frontal sinus width (FsWd) contributed the most for sexual dimorphism. The discrimination accuracy was 87.6% (84.2% in males and 91.1% in females). All the linear measurements were significantly larger in males except for angular variable which showed no significant difference between the two genders. Conclusion: According to the present findings, cephalometric craniomandibular parameters could be utilized to discriminate the gender of human remains using discriminant function analysis (DFA) in the selected Iranian population.
摘要简介:性别确定有助于建立人体遗骸的生物学概况。由于骨盆和头骨是人类骨骼中最坚硬的部分，因此从这两个部分识别尸体将非常有用。在同轴骨之后，头骨是人类骨骼中性别歧视最严重的部分。由于没有在伊朗人群中进行确定研究的报道，本研究旨在通过测量12个颅下颌参数来确定性别，并在伊朗马什哈德的选定人群中提供特定的判别功能评分。方法:选取年龄18 ~ 50岁的健康成人数字侧位脑电图202张，男101张，女101张。使用了14个头位测量点，可以跟踪11个线性测量和一个角度。使用onyxceph®2.6版软件追踪所有头测点和测量值。结果:通过分析，所选参数中，面部高度(N-Me)、下颌支高度(AR-Go)、下颌平面(Me-Go)、额窦宽度(FsWd)对两性异形的影响最大。鉴别正确率为87.6%(男性84.2%，女性91.1%)。除角变量外，所有的线性测量值在男性中均显著大于男性，而角变量在两性之间无显著差异。结论:根据本研究结果，在选定的伊朗人群中，使用判别函数分析(discriminant function analysis, DFA)，颅下颌参数可以用来区分人类遗骸的性别。
{"title":"Gender Determination Using Digital Lateral Cephalograms: A Discriminant Function Analysis","authors":"A. Bagherpour, N. Anbiaee, Shiva Motaghi, A. Jahanbin","doi":"10.22038/JDMT.2021.48358.1371","DOIUrl":"https://doi.org/10.22038/JDMT.2021.48358.1371","url":null,"abstract":"Abstract Introduction: Gender determination can help establishing a biological profile of the human body remains. Since the pelvic and skull remains are the most unyielding parts of human skeleton, identifying the dead bodies from these two parts would be very useful. After coaxial bone, the skull is the most gender-discriminated portion of the human skeleton. Since no determination study have been reported in Iranian population, present study aimed to determine gender by measuring 12 craniomandibular parameters and provide specific discriminant function scores in a selected population in Mashhad, Iran. Methods: a total of 202 digital lateral cephalograms of healthy adults, (101 males and 101 females) in the age range of 18 to 50 years were selected. 14 cephalometric points were utilized, which enabled tracing of 11 linear measurements and an angle. All cephalometric points and measurements were traced by onyxceph® version 2.6 software. Results: Based on the analyses, among the chosen parameters, facial height (N-Me), mandibular ramus height (AR-Go), mandibular plane (Me-Go), frontal sinus width (FsWd) contributed the most for sexual dimorphism. The discrimination accuracy was 87.6% (84.2% in males and 91.1% in females). All the linear measurements were significantly larger in males except for angular variable which showed no significant difference between the two genders. Conclusion: According to the present findings, cephalometric craniomandibular parameters could be utilized to discriminate the gender of human remains using discriminant function analysis (DFA) in the selected Iranian population.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"67 1","pages":"221-230"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74733948","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 : 2020-12-01DOI: 10.22038/JDMT.2020.48196.1366
Muhammet Karadas, T. Köse, Makbule Gamze Atıcı
Introduction: There are numerous commercially available dentin replacement materials but radiopacity level of these materials is unknown. The aim of this study was to evaluate radiopacity of seven dentin replacement materials in Class I cavities using a digital analysis system. Methods: TheraCal LC, Biodentine, Calcimol LC, Ultra-Blend Plus, Equia Forte, Ionoseal, and ApaCal ART were used as dentin replacement materials. Seventy molar teeth were prepared with Class I cavities and then were divided into seven groups. Each material tested was placed on floor of the cavity and then filled by Filtek Z250 composite (3M ESPE). Radiographic images were taken using an indirect digital system. Also, one disc-shaped specimen from each material was examined by energy-assisted X-ray spectroscopy for composition analysis. Results: Radiopacity values were significantly different among materials (p < 0.0001). Ultra-Blend Plus had the lowest radiopacity values. Calcimol LC, Equia Forte, and Ionoseal had significantly higher radiopacity levels compared to other materials and enamel. All materials demonstrated significantly higher radiopacity than dentin. Conclusions: Materials tested had different types and amounts of radiopacifier elements. Dentin replacement materials with lower radiopacity levels can create clinical challenges for diagnostic observations on margins.
{"title":"Comparison of Radiopacity of Dentin Replacement Materials","authors":"Muhammet Karadas, T. Köse, Makbule Gamze Atıcı","doi":"10.22038/JDMT.2020.48196.1366","DOIUrl":"https://doi.org/10.22038/JDMT.2020.48196.1366","url":null,"abstract":"Introduction: There are numerous commercially available dentin replacement materials but radiopacity level of these materials is unknown. The aim of this study was to evaluate radiopacity of seven dentin replacement materials in Class I cavities using a digital analysis system. Methods: TheraCal LC, Biodentine, Calcimol LC, Ultra-Blend Plus, Equia Forte, Ionoseal, and ApaCal ART were used as dentin replacement materials. Seventy molar teeth were prepared with Class I cavities and then were divided into seven groups. Each material tested was placed on floor of the cavity and then filled by Filtek Z250 composite (3M ESPE). Radiographic images were taken using an indirect digital system. Also, one disc-shaped specimen from each material was examined by energy-assisted X-ray spectroscopy for composition analysis. Results: Radiopacity values were significantly different among materials (p < 0.0001). Ultra-Blend Plus had the lowest radiopacity values. Calcimol LC, Equia Forte, and Ionoseal had significantly higher radiopacity levels compared to other materials and enamel. All materials demonstrated significantly higher radiopacity than dentin. Conclusions: Materials tested had different types and amounts of radiopacifier elements. Dentin replacement materials with lower radiopacity levels can create clinical challenges for diagnostic observations on margins.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"71 1","pages":"195-202"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77965017","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 : 2020-12-01DOI: 10.22038/JDMT.2020.46374.1350
Marziye Sehatpour, M. Sadrabad, M. Kheirkhahi, Shabnam Sohanian
Introduction: Sialolith is the most common condition of the salivary gland disorders after mumps, which usually occurs in the submandibular gland. A rare case of giant parotid sialolith is described. Case Report: A 58-years-old man with a complaint of swelling in the buccal area referred to the Department of Oral Medicine of the Dental School of Semnan University. A mild swelling was observed in the right cheek area in front of Ramus during the extraoral examination. Iintraoral evaluation revealed a 2.5 × 2 cm swelling with same color of the mucous membrane, adjacent to the maxillary first molar at the Parotid Papilla area, and with a stony-hard consistency. In the radiographic imaging, an estimated 18×6 mm homogenous opaque lesion was recognized; hence, the sialolith diagnosis was suggested. Surgical removal with electrocautery was done and no complaints were reported one month after the surgery. Conclusion: Since giant sialolith can lead to complications which may affect patients’ quality of life, surgical treatment of such lesion is strongly recommended.
{"title":"Giant Parotid Stone Causing Mucosal Ulceration and Pus Discharge: Report of a Rare Case","authors":"Marziye Sehatpour, M. Sadrabad, M. Kheirkhahi, Shabnam Sohanian","doi":"10.22038/JDMT.2020.46374.1350","DOIUrl":"https://doi.org/10.22038/JDMT.2020.46374.1350","url":null,"abstract":"Introduction: Sialolith is the most common condition of the salivary gland disorders after mumps, which usually occurs in the submandibular gland. A rare case of giant parotid sialolith is described. Case Report: A 58-years-old man with a complaint of swelling in the buccal area referred to the Department of Oral Medicine of the Dental School of Semnan University. A mild swelling was observed in the right cheek area in front of Ramus during the extraoral examination. Iintraoral evaluation revealed a 2.5 × 2 cm swelling with same color of the mucous membrane, adjacent to the maxillary first molar at the Parotid Papilla area, and with a stony-hard consistency. In the radiographic imaging, an estimated 18×6 mm homogenous opaque lesion was recognized; hence, the sialolith diagnosis was suggested. Surgical removal with electrocautery was done and no complaints were reported one month after the surgery. Conclusion: Since giant sialolith can lead to complications which may affect patients’ quality of life, surgical treatment of such lesion is strongly recommended.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"5 1","pages":"231-234"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77478730","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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