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지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한치과보철학회 The Journal of Advanced of Prosthodontics The Journal of Advanced of Prosthodontics 제6권 제6호
- 발행연도
- 2014.1
- 수록면
- 468 - 473 (6page)
이용수
초록· 키워드
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PURPOSE. This study aimed to evaluate the accuracy of digitizing dental impressions of abutment teeth using a white light scanner and to compare the findings among teeth types.
MATERIALS AND METHODS. To assess precision, impressions of the canine, premolar, and molar prepared to receive all-ceramic crowns were repeatedly scanned to obtain five sets of 3-D data (STL files). Point clouds were compared and error sizes were measured (n=10 per type). Next, to evaluate trueness, impressions of teeth were rotated by 10°–20° and scanned. The obtained data were compared with the first set of data for precision assessment, and the error sizes were measured (n=5 per type). The Kruskal–Wallis test was performed to evaluate precision and trueness among three teeth types, and post-hoc comparisons were performed using the Mann–Whitney U test with Bonferroni correction (α=.05).
RESULTS. Precision discrepancies for the canine, premolar, and molar were 3.7 μm, 3.2 μm, and 7.3 μm, respectively, indicating the poorest precision for the molar (P<.001). Trueness discrepancies for teeth types were 6.2 μm, 11.2 μm, and 21.8 μm, respectively, indicating the poorest trueness for the molar (P=.007).
CONCLUSION. In respect to accuracy the molar showed the largest discrepancies compared with the canine and premolar. Digitizing of dental impressions of abutment teeth using a white light scanner was assessed to be a highly accurate method and provided discrepancy values in a clinically acceptable range. Further study is needed to improve digitizing performance of white light scanning in axial wall.
목차
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참고문헌 (22)
참고문헌 신청
/ 2003 / ISO 5725-1:2003. Accuracy (trueness and precision) of measurement methods and results? Part 1: General principles and definitions / ISO
Alikhasi M. / 2013 / A comparison of precision of fit, rotational freedom, and torque loss with copy-milled zirconia and prefabricated titanium abutments / Int J Oral Maxill
Brosky ME. / 2002 / Laser digitization of casts to determine the effect of tray selection and cast formation technique on accuracy / J Prosthet Dent 87 : 204 ~ 209
Chandran DT. / 2010 / Twoand three-dimensional accuracy of dental impression materials : effects of storage time and moisture contamination / Biomed Mater Eng 20 : 243 ~ 249
Chang M. / 2009 / Automated scanning of dental impressions / Comput-aided des 41 : 404 ~ 411
Alikhasi M. / 2013 / A comparison of precision of fit, rotational freedom, and torque loss with copy-milled zirconia and prefabricated titanium abutments / Int J Oral Maxill
Brosky ME. / 2002 / Laser digitization of casts to determine the effect of tray selection and cast formation technique on accuracy / J Prosthet Dent 87 : 204 ~ 209
Chandran DT. / 2010 / Twoand three-dimensional accuracy of dental impression materials : effects of storage time and moisture contamination / Biomed Mater Eng 20 : 243 ~ 249
Chang M. / 2009 / Automated scanning of dental impressions / Comput-aided des 41 : 404 ~ 411
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