Journal of International Clinical Dental Research Organization最新文献_第5页

Microscopic evaluation of fissure patterns of posterior permanent teeth: An in vitro study 后恒牙裂隙形态的显微评价:体外研究

IF 0.1

Journal of International Clinical Dental Research Organization Pub Date : 2022-12-31 DOI: 10.5577/intdentres.2022.vol12.no3.1

Mediha Büyükgöze Dindar, Meltem Tekbaş Atay

{"title":"Microscopic evaluation of fissure patterns of posterior permanent teeth: An in vitro study","authors":"Mediha Büyükgöze Dindar, Meltem Tekbaş Atay","doi":"10.5577/intdentres.2022.vol12.no3.1","DOIUrl":"https://doi.org/10.5577/intdentres.2022.vol12.no3.1","url":null,"abstract":"Aim: Pits and fissures are considered the areas in the posterior teeth that are most susceptible to decay. The aim of this in vitro study was to evaluate the prevalence of fissure types in relation to tooth type and localization.\u0000Methodology: A total of 100 extracted sound maxillary and mandibular molars and premolars were included in this study (25 teeth/group). The extracted teeth without any caries, cracks, fractures, anomalies, or restorations were classified according to tooth type and localization after disinfection. The teeth were sectioned in the buccolingual direction from the deepest part of the central fossa on the occlusal surface, and the fissure patterns were observed using a stereo microscope. The frequency distribution and percentages of the categorical data were obtained. Chi-square and exact tests were performed to compare the localization of the teeth and the prevalence of fissure types (p < 0.05).\u0000Results: The V-type fissure pattern (59%) was statistically significantly more common in both the premolar and molar teeth, followed by the I-type (18%) and U-type (14%) patterns (p = 0.000). The rarest fissure pattern was the IK type. No relationships were found between fissure pattern, the tooth subgroups, and localization (p = 0.390).\u0000Conclusion: Determining the types of fissure morphology is important for the prevention of caries on the occlusal surfaces of molars and premolars.\u0000 \u0000How to cite this article: \u0000Büyükgöze Dindar M, Tekbaş Atay M. Microscopic evaluation of fissure patterns of posterior permanent teeth: An in vitro study. Int Dent Res 2022;12(3):107-11. https://doi.org/10.5577/intdentres.2022.vol12.no3.1\u0000 \u0000Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.","PeriodicalId":31322,"journal":{"name":"Journal of International Clinical Dental Research Organization","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74898855","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}

引用次数: 0

Effect of repolishing on the surface roughness and color stability of air-abraded resin composites 再抛光对空气研磨树脂复合材料表面粗糙度和颜色稳定性的影响

IF 0.1

Journal of International Clinical Dental Research Organization Pub Date : 2022-12-31 DOI: 10.5577/intdentres.2022.vol12.no3.5

Nurcan Altaş, A. Aydınoğlu, Burcu Gözetici Çil, Ergün Keleşoğu, Kadir Sağır, Afife Binnaz Hazar Yoruç

{"title":"Effect of repolishing on the surface roughness and color stability of air-abraded resin composites","authors":"Nurcan Altaş, A. Aydınoğlu, Burcu Gözetici Çil, Ergün Keleşoğu, Kadir Sağır, Afife Binnaz Hazar Yoruç","doi":"10.5577/intdentres.2022.vol12.no3.5","DOIUrl":"https://doi.org/10.5577/intdentres.2022.vol12.no3.5","url":null,"abstract":"Aim: Air powder polishing (APP) can cause roughness on composite surfaces, and consequently the color change that occurs over time affects the aesthetic negatively. Here, we aim to investigate the effect of repolishing on the roughness and discoloration of resin composites after APP to avoid its negative effects for the first time.\u0000Methodology: A total of 39 composite discs were randomly allocated into three groups: Group I: Control (n = 13), Group II: Air Powder Polished (n = 13), and Group III: Air Powder Polished + Re-polished (n = 13). Color and surface roughness of the discs were measured before and after immersion in coffee for 1 week. Color was measured using a colorimeter (CR-400, Konica Minolta), and roughness was measured using a surface roughness analyzer (SJ-400, Mitutoyo, Japan).\u0000Results: All specimens in the groups, except those in Group III, showed significant changes in roughness, and all materials showed significant color changes after immersion in the coffee relative to the baseline. There was no statistically significant difference between the groups in terms of roughness and color.\u0000Conclusion: In this study, we showed that repolishing after APP does not significantly improve the color stability and roughness of the composite restorations.\u0000 \u0000How to cite this article: \u0000Altaş N, Sağır K, Aydınoğlu A, Gözetici Çil B, Keleşoğlu E, Sağır K, Hazar Yoruç AB. Effect of repolishing on the surface roughness and color stability of air-abraded resin composites. Int Dent Res 2022;12(3):137-42. https://doi.org/10.5577/intdentres.2022.vol12.no3.5\u0000 \u0000Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.","PeriodicalId":31322,"journal":{"name":"Journal of International Clinical Dental Research Organization","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90073521","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}

引用次数: 0

The frequency and degree of expression of Carabelli’s trait on the permanent maxillary molars in a sample of Turkish individuals 卡拉贝利性状在土耳其人恒上颌磨牙上的表达频率和程度

IF 0.1

Journal of International Clinical Dental Research Organization Pub Date : 2022-12-31 DOI: 10.5577/intdentres.2022.vol12.no3.2

H. Ö. Yılancı, G. Özkan, N. Akkaya, Hatice Boyacıoğlu

{"title":"The frequency and degree of expression of Carabelli’s trait on the permanent maxillary molars in a sample of Turkish individuals","authors":"H. Ö. Yılancı, G. Özkan, N. Akkaya, Hatice Boyacıoğlu","doi":"10.5577/intdentres.2022.vol12.no3.2","DOIUrl":"https://doi.org/10.5577/intdentres.2022.vol12.no3.2","url":null,"abstract":"Aim: Carabelli’s trait, a morphological feature on the mesiopalatal surface of the maxillary molars, has importance in anthropology, forensic sciences, and clinical dentistry. The aim of this study was to find the frequency and degree of expression of Carabelli’s trait and to assess the asymmetry of the trait, on three permanent maxillary molars in a sample of Turkish individuals.\u0000Methodology: Carabelli’s trait was evaluated using Dahlberg’s eight-grade scale on 462 subjects. Data were analyzed using a chi-square test.\u0000Results: The frequencies in the total, positive and negative expressions of the trait were, respectively, 64.5%, 37.7% and 26.8% on the first molars, 27.1%, 19.6% and 7.6% on the second molars and 10.3%, 8.7% and 1.6% on the third molars. The occurrence of the trait on the first and second molars was more prevalent in males than in females. The trait was most frequently bilateral and symmetrical without significant sex differences, with varying degrees of asymmetry that increased from the first to the third molars. The frequencies of presence-absence asymmetry and any degree of asymmetry on the first molars were 5.3% and 15.7%, respectively.\u0000Conclusion: This study revealed a comparatively high frequency of Carabelli’s trait with a relatively low asymmetry in a contemporary Turkish sample. This data has the potential to be used for anthropological, forensic, and clinical purposes.\u0000 \u0000How to cite this article: \u0000Yılancı HÖ, Özkan G, Akkaya N, Boyacıoğlu H. The frequency and degree of expression of Carabelli’s trait on the permanent maxillary molars in a sample of Turkish individuals. Int Dent Res 2022;12(3):112-9. https://doi.org/10.5577/intdentres.2022.vol12.no3.2\u0000 \u0000Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.","PeriodicalId":31322,"journal":{"name":"Journal of International Clinical Dental Research Organization","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83443971","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}

引用次数: 0

Dentistry students after the COVID-19 outbreak has the view of distance education changed 新冠肺炎疫情爆发后，牙科学生对远程教育的看法发生了变化

IF 0.1

Journal of International Clinical Dental Research Organization Pub Date : 2022-11-01 DOI: 10.5577/intdentres.440

Hakan Yasin Gönder, M. Fidan, Mehmet Gökberkkaan Demirel, Mehmet Soybelli, Sinem Alkurt, İ. Yüksel

{"title":"Dentistry students after the COVID-19 outbreak has the view of distance education changed","authors":"Hakan Yasin Gönder, M. Fidan, Mehmet Gökberkkaan Demirel, Mehmet Soybelli, Sinem Alkurt, İ. Yüksel","doi":"10.5577/intdentres.440","DOIUrl":"https://doi.org/10.5577/intdentres.440","url":null,"abstract":"Aim: The aim of this study is to evaluate the change in the anxiety level of dentistry students and their perspective on distance education at the outbreak of the COVID-19 pandemic and when the restrictions were reduced to a minimum.\u0000Methodology: The participants were undergraduate students of the faculty of dentistry who volunteered to participate in the study (n=297). A questionnaire was prepared, which includes the anxiety of the person during the COVID-19 period and in the last months and the opinions of students about the theoretical dentistry lessons taught with distance education. An Independent sample t-test was used for the comparison of the measurement values between the groups, and the one-way analysis of variance test was used for the comparison of more than two groups. Pearson correlation analysis was used to evaluate the relationship between anxiety levels. A value of p<0.05 was considered statistically significant.\u0000Results: Compared to the genders, among the more enthusiastic thoughts in distance education, their thoughts that technology-based education is beneficial, and their thoughts that theoretical education should be realized through distance education, men answered yes at a higher rate than women (p <0.05). Compared to the early times of the COVID-19 pandemic, it was observed that there was a decrease in the anxiety scores of the participants in the last months when their precautions were reduced.\u0000Conclusion: It was observed that male students were more inclined to use the internet, according to the findings that technology-based education is beneficial, their preferences for distance education, and they are motivated in distance education. Due to the interruption of face-to-face education and the sudden transition to distance education during the COVID-19 pandemic, it is important to identify the deficiencies in this education method and develop this system.","PeriodicalId":31322,"journal":{"name":"Journal of International Clinical Dental Research Organization","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81206183","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}

引用次数: 0

Retrospective analysis of the impact of local anesthetic used during dental procedures on patients with epilepsy's vital signs 牙科手术中局部麻醉剂对癫痫患者生命体征影响的回顾性分析

IF 0.1

Journal of International Clinical Dental Research Organization Pub Date : 2022-11-01 DOI: 10.5577/intdentres.444

Hazal Özer, Merve Abaklı İnci, Hemra Nur Özaşık

{"title":"Retrospective analysis of the impact of local anesthetic used during dental procedures on patients with epilepsy's vital signs","authors":"Hazal Özer, Merve Abaklı İnci, Hemra Nur Özaşık","doi":"10.5577/intdentres.444","DOIUrl":"https://doi.org/10.5577/intdentres.444","url":null,"abstract":"Aim: In our study, it is aimed to investigate the effects on vital signs by measuring fever, oxygen saturation, pulse, and blood pressure from the patient before, during, and after local anesthesia application.\u0000Methodology: Patients who applied to Necmettin Erbakan University, Faculty of Dentistry, Department of Pedodontics between January 2021 and July 2022, who had epilepsy and needed dental treatment; After clinical/radiographic examination, Necmettin Erbakan University Meram Medical Faculty Pediatric Neurology Department was sent for consultation. Within the scope of the research, temperature, oxygen saturation, pulse, and blood pressure measurements were made before, during, and after anesthesia in 39 procedures performed on 19 patients in total. SPSS 23 program was used for the statistical analysis of data. Before the analysis of the data, Kolmogorov-Smirnov and Shapiro-Wilk tests were applied to test the normality of the distribution. Paired sample t-test was used to examine the fever, pulse, blood pressure, and oxygen saturation levels of the participants before, during, and after anesthesia. The statistical significance level in the study was accepted as p<0.05.\u0000Results: There was a statistically significant difference between the participants' pulse measurements during anesthesia and their post-anesthetic pulse measurements (p= 0.049). There was a statistically significant difference between pre-anesthesia oxygen saturation measurements and pre-anesthesia oxygen saturation measurements (p= 0.042). There was a statistically significant difference between the pre-anesthesia oxygen saturation measurements and the post-anesthetic oxygen saturation measurements of the participants (p= 0.012).\u0000Conclusion: In patients with a history of epilepsy, attention should be paid to the anesthetics used during the procedure and the consequences of dental anxiety, and dental treatments should be planned within the necessary precautions.","PeriodicalId":31322,"journal":{"name":"Journal of International Clinical Dental Research Organization","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88473867","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}

引用次数: 0

Evaluation of parents’ level of knowledge and attitude on early childhood caries 家长对幼儿龋病知识和态度的评价

IF 0.1

Journal of International Clinical Dental Research Organization Pub Date : 2022-11-01 DOI: 10.5577/intdentres.446

Merve Abaklı İnci, Hazal Özer, Sevcihan Acar Tuzluca

{"title":"Evaluation of parents’ level of knowledge and attitude on early childhood caries","authors":"Merve Abaklı İnci, Hazal Özer, Sevcihan Acar Tuzluca","doi":"10.5577/intdentres.446","DOIUrl":"https://doi.org/10.5577/intdentres.446","url":null,"abstract":"Aim: Tooth decay is recognized as the world's most common bacterial infection. Despite preventive practices to prevent dental caries, early childhood caries continues to be a health problem that concerns the whole world. The incidence of ECC may vary depending on the cultural habits of societies regarding infant feeding. The aim of this study is to evaluate parents' attitudes about early childhood caries, to determine their misbehaviors that cause ECC, and to evaluate their knowledge level about preventive and preventive treatments.\u0000Methodology: The study was conducted on 150 participants. The research is a cross-sectional survey study, and it was hand-made to the parents who applied to the clinic. Participation in the research was completely voluntary, and parents who submitted a fully filled questionnaire and volunteered to participate in the study were included, while parents who did not want to participate in the study, did not answer at least one question, were illiterate, and were excluded from the study.\u0000Results: 67.3% of the parents participating in the study were female (n=101), and 32.7% were male (n=49). 36.7% of the participants said, “The bacteria that cause caries can be passed from mother/caregiver to child.” He gave the correct answer by answering yes to the proposition. 42.7% of the participants said, \"The first sign of dental caries is white spots on the tooth surface.\" While answering yes to the proposition, 79.3% said, “If early childhood caries is not treated, it can affect the general health and development of the child.” He gave the correct answer by answering yes to the proposition.\u0000Conclusion: The risk determinants of ECC should be identified as early as possible, and the most appropriate preventive measures should be implemented rapidly with accurate information and on-site interventions.","PeriodicalId":31322,"journal":{"name":"Journal of International Clinical Dental Research Organization","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86853221","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}

引用次数: 1

The effect of the material used and the pulp chamber extension depth on stress distributions of endocrowns: A 3D finite element analysis 材料和牙髓室延伸深度对牙髓冠应力分布的影响:三维有限元分析

IF 0.1

Journal of International Clinical Dental Research Organization Pub Date : 2022-11-01 DOI: 10.5577/intdentres.436

Neslihan Güntekin, R. Mohammadi, M. Tunçdemir

{"title":"The effect of the material used and the pulp chamber extension depth on stress distributions of endocrowns: A 3D finite element analysis","authors":"Neslihan Güntekin, R. Mohammadi, M. Tunçdemir","doi":"10.5577/intdentres.436","DOIUrl":"https://doi.org/10.5577/intdentres.436","url":null,"abstract":"Purpose: The aim of this study was to examine the effects of materials used and length of extension into the pulp chamber on stress distribution in mandibular molar endodontic treated teeth with endocrown restoration using a 3D finite element analysis (FEA).\u0000Material and Methods: Three-dimensional finite element analysis models were obtained at 2 different pulpal extension depths by taking a tomography of a canal-treated mandibular molar tooth extracted for periodontal reasons: 2.5 mm (Model A), 3.5 mm (Model B). Models are divided into 3 groups according to material type: Vita Enamic (VE), Lava Ultimate (LU), IPS e.max CAD (EMX). There are also 2 different subgroups for the cement types used: NX3, and MaxCem Elite Chroma (MX) Maximum principal stress (MPa) values under 600 N vertical loads were investigated to evaluate the effect of restoration design, material type and cements used on stress distribution.\u0000Result: The maximum stress on the restoration was observed in the EMX material type (13,000 MPa) in the MX cement group in Model A, while the lowest was observed in the LU material (5,932 MPa) in the NX3 cement group in Model A. The highest stress areas for model A and model B were observed in the restoration areas corresponding to the enamel margins.\u0000Conclusions: Materials with higher elastic modulus show a high-stress area on the restoration surface, while the stress values they transmit are lower. Materials, where the elastic modulus is close to dentin have more homogeneous stress distributions within the restoration.","PeriodicalId":31322,"journal":{"name":"Journal of International Clinical Dental Research Organization","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80747022","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}

引用次数: 0

The effect of the viewing distance on determination of the relationship between age and tooth color 观察距离对确定年龄与牙齿颜色关系的影响

IF 0.1

Journal of International Clinical Dental Research Organization Pub Date : 2022-11-01 DOI: 10.5577/intdentres.442

Burcu Kızılırmak, Neslihan Güntekin, A. Tunçdemir

{"title":"The effect of the viewing distance on determination of the relationship between age and tooth color","authors":"Burcu Kızılırmak, Neslihan Güntekin, A. Tunçdemir","doi":"10.5577/intdentres.442","DOIUrl":"https://doi.org/10.5577/intdentres.442","url":null,"abstract":"Aim: This study aims to question the effect of visual distance on color selection by scoring the maxillary central tooth color with the visual color selection method and to investigate the relationship between tooth color and patient age.\u0000Material and Methods: Maxillary central tooth color was determined by a single operator using visual methods from two different distances, 35 cm, and 70 cm, in a total of 100 people between the ages of 20-80 and of different genders. The value, hue, and ages of the teeth were recorded using the VITA Toothguide 3D-MASTER color scale at 2 different viewing distances. Visual color selection was made in natural daylight, preferably between 10:00 and 12:00 in the morning. Subjects were observed at eye level, and all color assessments were performed rapidly (5-7 s). Independent T-test was used for independent groups and the Chi-square test was used for dependent groups.\u0000Result: Considering the relationship of lightness with distance, there is a significant difference between the values at 35 cm and 70 cm distances. It was observed that the lightness increased when the measurements made from 70 cm were compared with the measurements made from 35 cm. As the age increases, the ratio of the brightness value of 1, which is the highest lightness, decreases, and the ratio of the darker 3 and 4 lightness increases. R (reddish) hue was higher in the 40-59 and over 60 age groups compared to the 20-39 age group.\u0000Conclusion: It was observed that the tooth color was determined lighter in the measurements made from 70 cm compared to the measurements made from 35 cm. It is important to determine the color at 35 cm so that the incorrect lightness (value) is not selected. It can be said that as the age increases, the tooth gets darker, and the reddish and yellowish hue increases.","PeriodicalId":31322,"journal":{"name":"Journal of International Clinical Dental Research Organization","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72819409","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}

引用次数: 0

Investigation of the coloring effects of different ground-based coffee types on composite resin materials 不同咖啡粉对复合树脂材料着色效果的研究

IF 0.1

Journal of International Clinical Dental Research Organization Pub Date : 2022-11-01 DOI: 10.5577/intdentres.448

Meryem Erdoğdu, M. Tunçdemir, Neslihan Güntekin

{"title":"Investigation of the coloring effects of different ground-based coffee types on composite resin materials","authors":"Meryem Erdoğdu, M. Tunçdemir, Neslihan Güntekin","doi":"10.5577/intdentres.448","DOIUrl":"https://doi.org/10.5577/intdentres.448","url":null,"abstract":"Aim: The aim of the study is to investigate the effect of different ground coffee types on the color change on nanohybrid and bulk fill composites.\u0000Methodology: A total of 80 disc-shaped samples were made from 2 types of A2 resin with nanohybrid (Tetric N Ceram Ivoclar Vivadent, Schaan, Liechtenstein) and bulk fill (Filtek Bulk Fill, 3M ESPE, St. Paul, MN, USA) structure with the help of 5 mm diameter and 8 mm thickness Teflon molds in this study. All samples were finished and polished with 4-stage (thick, medium, fine, superfine) polishing discs (Sof-lex, 3M ESPE, St. Paul, MN, USA) and kept at 37 °C for 24 hours. The samples, whose initial color measurements were made by spectrophotometer (VitaEasyShade, Vita ZahnFabrik, Bad Sackingen, Germany), were divided into subgroups for the control group and 4 types of ground-based coffee beverages including filter coffee, Turkish coffee, espresso, and Mırra (n=8). Distilled water used as control. Prepared coffees were added to the microcentrifuge tubes and refreshed daily during the 14-day exposure period. ΔE values were calculated for each material. The statistical analyses of the present study were performed using one-way analysis of variance and Tukey multiple comparisons (p=0.05).\u0000Results: There was no significant color change for both nanofill and bulk-fill composite groups in the control group samples (p>0.05). Filter coffee was found the most colorant coffee type on both composites (p<0.05). Among the coffee types, Mırra caused the least coloration in both composites.\u0000Conclusion: The consumption of two or more cups of coffee per day, especially filter coffee, can cause color changes on both conventional and bulk-fill composites, and it should be considered an important factor causing aesthetic problems in dental restorations.","PeriodicalId":31322,"journal":{"name":"Journal of International Clinical Dental Research Organization","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79853021","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}

引用次数: 0

The effect of margin design on stress distribution in zirconia-based full crown restorations: A 3D finite element analysis 边缘设计对氧化锆全冠修复体应力分布的影响:三维有限元分析

IF 0.1

Journal of International Clinical Dental Research Organization Pub Date : 2022-11-01 DOI: 10.5577/intdentres.439

Neslihan Güntekin, R. Mohammadi, A. Tunçdemir

{"title":"The effect of margin design on stress distribution in zirconia-based full crown restorations: A 3D finite element analysis","authors":"Neslihan Güntekin, R. Mohammadi, A. Tunçdemir","doi":"10.5577/intdentres.439","DOIUrl":"https://doi.org/10.5577/intdentres.439","url":null,"abstract":"Purpose: The aim of this study is to evaluate the effect of changes in margin design on the stress distribution on the restoration in zirconia-based full-crown restorations using 3D finite element analysis.\u0000Material and Methods: To be used in the design of full-crown restorations, tooth number 16 was prepared in chamfer step type on a maxillary tooth-jaw model (AG-3: Tipodont, frasaco, Germany). The prepared tooth was scanned using a desktop scanner, and a 3D finite element analysis model was obtained. Zirconia frameworks are divided into 3 groups according to margin design: uniform thickness hood type (Model A), ¾ partial crown form (Model B), and lingual banded (Model C). The crown form was completed by using felspathic porcelain as the superstructure material. In order to examine the stress distributions of the margin design on the restoration, the maximum principal stress (MPa) values under 600 N vertical load were investigated.\u0000Result: The maximum stress on the zirconia framework was observed in Model A (82.90 MPa), and the maximum stress on the tooth was observed in Model B (49.34 MPa). The maximum stress on the feldspathic porcelain has the highest value in Model A (21,860 MPa). The minimum stress on the tooth occurred in Model B and is 13.33 MPa. In the zirconia framework, the lowest stress is 11.54 MPa in Model B.\u0000Conclusions: Within the results of the study, it is clear that the framework design affects the force generated on the restoration and transmitted to the tooth. The results of the study will benefit dentists in determining the infrastructure design in zirconia-based restorations. Lingual band designs have been found successful.","PeriodicalId":31322,"journal":{"name":"Journal of International Clinical Dental Research Organization","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83747013","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}

引用次数: 0