The reliability of an easy measuring method for abutment convergence angle with a computer-aided design (CAD) system.
- Author:
Yong Joon SEO
1
;
Taek Ka KWON
;
Jung Suk HAN
;
Jai Bong LEE
;
Sung Hun KIM
;
In Sung YEO
Author Information
- Publication Type:Validation Studies ; Original Article
- Keywords: Computer-aided design; Convergence angle; Prosthodontic tooth preparation; Validation studies; Dental abutments
- MeSH: Computer-Aided Design*; Dental Abutments; Humans; Students, Dental; Tooth Preparation, Prosthodontic
- From:The Journal of Advanced Prosthodontics 2014;6(3):185-193
- CountryRepublic of Korea
- Language:English
- Abstract: PURPOSE: The purpose of this study was to evaluate the intra-rater reliability and inter-rater reliability of three different methods using a drawing protractor, a digital protractor after tracing, and a CAD system. MATERIALS AND METHODS: Twenty-four artificial abutments that had been prepared by dental students were used in this study. Three dental students measured the convergence angles by each method three times. Bland-Altman plots were applied to examine the overall reliability by comparing the traditional tracing method with a new method using the CAD system. Intraclass Correlation Coefficients (ICC) evaluated intra-rater reliability and inter-rater reliability. RESULTS: All three methods exhibited high intra-rater and inter-rater reliability (ICC>0.80, P<.05). Measurements with the CAD system showed the highest intra-rater reliability. In addition, it showed improved inter-rater reliability compared with the traditional tracing methods. CONCLUSION: Based on the results of this study, the CAD system may be an easy and reliable tool for measuring the abutment convergence angle.
