AIM To test the reliability of the Sawai’s classification for dental cervical abrasions.METHODSIntraoral photographs of 70 teeth from 23 patients with tooth abrasions were taken by the first examiner MS.The teeth wer...AIM To test the reliability of the Sawai’s classification for dental cervical abrasions.METHODSIntraoral photographs of 70 teeth from 23 patients with tooth abrasions were taken by the first examiner MS.The teeth were marked and the photos were maintained in a soft copy sequentially.Two other examiners FA and SC were trained in the use of the classification and any clarifications needed were provided at the beginning of the study.Each examiner was then given the soft copy of the complied photographs and was asked to classify the dental cervical abrasion according to their understanding of the Sawai’s classification.They were given sheets to write their responses for every marked tooth.All the examiners were blinded to each other’s observations which were then tested for inter-rater agreement among the three examiners.RESULTSThe 70 teeth with tooth abrasions from 23 patients were examined by 3 investigators(MS,FA and SC)to test the reliability of the Sawai’s classification system for tooth abrasion.Each examiner marked their responses in separate sheets which were blinded to each other.The kappa statistics were performed for inter-rater agreement among the three examiners.The level of agreement was evaluated according to the six-level nomenclature given by Landis and Koch.ICC and 95%CI between two examiners,i.e.,the inter-rater agreement among 1^(st) examiner(MS) and 2^(nd) examiner(FA) was 0.89.The inter-rater agreement among 1^(st) examiner(MS) and 3^(rd) examiner(SC) was 0.89.And the inter-rater agreement among 2^(nd) examiner(FA) and 3^(rd) examiner(SC) was 0.83.All the three comparisons show an almost perfect agreement between them.CONCLUSIONThere is an almost perfect agreement between multiple observers for classifying dental cervical abrasions using Sawai’s classification.Hence,this classification is reliable.展开更多
Aim: To describe the presence, frequency of attrition in permanent dentition of human skulls from two ancient archeological locations. Aims: To determine the rate of attrition using a specific quantitative and qualita...Aim: To describe the presence, frequency of attrition in permanent dentition of human skulls from two ancient archeological locations. Aims: To determine the rate of attrition using a specific quantitative and qualitative method. Methods: Twenty one human skulls from two ancient archeological necropolises (Vendenis and Municipium Dardanorum DD) were included in the analysis of samples for this study. A total of 498 teeth were present in all human skulls. The skulls (with their accompanying teeth) were then divided into groups according to locality of origin, age and sex. Macroscopic (observational) analysis of the teeth relied on inspection and exploration of the teeth in their totality. The classification system that was used to rate tooth wear was Tooth Wear Index (TWI). Statistical analysis used: Chitest for small samples was used to evaluate the observations obtained from the study. Multiple Logistic Regression Analysis was not performed due to the small number of teeth and the content of zero values in respective age groups. Results: The results show that out of total 498 teeth, 89.35% had attrition and 10.65% had no attrition or Grade 0 TWI. 21.48% were Grade 1, 28.71% Grade 2, 26.90% Grade 3, 7.42% Grade 4 and 4.81% Grade 5. Conclusions: Grade 2 and higher rate of attrition, was predominantly present in first permanent molars.展开更多
背景:VITA 3D Master比色板是近年来新推出的新型比色系统,具有广泛的应用前景。目的:评价牙本质比色对铸瓷修复体临床精确比色的意义。方法:分别使用常规比色法和常规比色法联合牙本质比色法(联合比色法)为30例患者的患牙颈1/3、中1/3...背景:VITA 3D Master比色板是近年来新推出的新型比色系统,具有广泛的应用前景。目的:评价牙本质比色对铸瓷修复体临床精确比色的意义。方法:分别使用常规比色法和常规比色法联合牙本质比色法(联合比色法)为30例患者的患牙颈1/3、中1/3、切1/3进行比色。在CIE1976L*a*b*色度系统下,用单反数码相机(Canon D50)对2种比色方法制作的铸瓷修复体与同名牙进行色度值测定和分析。并对各种新型比色方法进行举例分析。结果与结论:常规比色法制作的修复体△L*为1.22±0.16,△C*为1.19±0.20,△H*为0.31±0.05,△E*为1.32±0.13;联合比色法制作的修复体△L*为1.03±0.11,△C*为1.12±0.19,△H*为0.29±0.03,△E*为1.23±0.11。常规比色法制作的修复体满意22例,联合比色法制作的修复体满意23例。患者对2组修复体色彩还原效果满意度差异无显著性学意义(P>0.05),2组修复体色差分析有统计学意义(P<0.05)。展开更多
文摘AIM To test the reliability of the Sawai’s classification for dental cervical abrasions.METHODSIntraoral photographs of 70 teeth from 23 patients with tooth abrasions were taken by the first examiner MS.The teeth were marked and the photos were maintained in a soft copy sequentially.Two other examiners FA and SC were trained in the use of the classification and any clarifications needed were provided at the beginning of the study.Each examiner was then given the soft copy of the complied photographs and was asked to classify the dental cervical abrasion according to their understanding of the Sawai’s classification.They were given sheets to write their responses for every marked tooth.All the examiners were blinded to each other’s observations which were then tested for inter-rater agreement among the three examiners.RESULTSThe 70 teeth with tooth abrasions from 23 patients were examined by 3 investigators(MS,FA and SC)to test the reliability of the Sawai’s classification system for tooth abrasion.Each examiner marked their responses in separate sheets which were blinded to each other.The kappa statistics were performed for inter-rater agreement among the three examiners.The level of agreement was evaluated according to the six-level nomenclature given by Landis and Koch.ICC and 95%CI between two examiners,i.e.,the inter-rater agreement among 1^(st) examiner(MS) and 2^(nd) examiner(FA) was 0.89.The inter-rater agreement among 1^(st) examiner(MS) and 3^(rd) examiner(SC) was 0.89.And the inter-rater agreement among 2^(nd) examiner(FA) and 3^(rd) examiner(SC) was 0.83.All the three comparisons show an almost perfect agreement between them.CONCLUSIONThere is an almost perfect agreement between multiple observers for classifying dental cervical abrasions using Sawai’s classification.Hence,this classification is reliable.
文摘Aim: To describe the presence, frequency of attrition in permanent dentition of human skulls from two ancient archeological locations. Aims: To determine the rate of attrition using a specific quantitative and qualitative method. Methods: Twenty one human skulls from two ancient archeological necropolises (Vendenis and Municipium Dardanorum DD) were included in the analysis of samples for this study. A total of 498 teeth were present in all human skulls. The skulls (with their accompanying teeth) were then divided into groups according to locality of origin, age and sex. Macroscopic (observational) analysis of the teeth relied on inspection and exploration of the teeth in their totality. The classification system that was used to rate tooth wear was Tooth Wear Index (TWI). Statistical analysis used: Chitest for small samples was used to evaluate the observations obtained from the study. Multiple Logistic Regression Analysis was not performed due to the small number of teeth and the content of zero values in respective age groups. Results: The results show that out of total 498 teeth, 89.35% had attrition and 10.65% had no attrition or Grade 0 TWI. 21.48% were Grade 1, 28.71% Grade 2, 26.90% Grade 3, 7.42% Grade 4 and 4.81% Grade 5. Conclusions: Grade 2 and higher rate of attrition, was predominantly present in first permanent molars.
文摘背景:VITA 3D Master比色板是近年来新推出的新型比色系统,具有广泛的应用前景。目的:评价牙本质比色对铸瓷修复体临床精确比色的意义。方法:分别使用常规比色法和常规比色法联合牙本质比色法(联合比色法)为30例患者的患牙颈1/3、中1/3、切1/3进行比色。在CIE1976L*a*b*色度系统下,用单反数码相机(Canon D50)对2种比色方法制作的铸瓷修复体与同名牙进行色度值测定和分析。并对各种新型比色方法进行举例分析。结果与结论:常规比色法制作的修复体△L*为1.22±0.16,△C*为1.19±0.20,△H*为0.31±0.05,△E*为1.32±0.13;联合比色法制作的修复体△L*为1.03±0.11,△C*为1.12±0.19,△H*为0.29±0.03,△E*为1.23±0.11。常规比色法制作的修复体满意22例,联合比色法制作的修复体满意23例。患者对2组修复体色彩还原效果满意度差异无显著性学意义(P>0.05),2组修复体色差分析有统计学意义(P<0.05)。
