Digital measurement method for comparing the absolute marginal discrepancy of three-unit ceramic fixed dental prostheses fabricated using conventional and digital technologies

被引:0
作者
Liang, Shanshan [1 ,2 ,3 ,4 ,5 ,6 ]
Yuan, Fusong [2 ,3 ,4 ,5 ,6 ,7 ]
Li, Deli [3 ,4 ,5 ,8 ]
Jia, Lu [3 ,4 ,5 ,9 ]
Sun, Yuchun [2 ,3 ,4 ,5 ,6 ,7 ]
机构
[1] Peking Univ Sch & Hosp Stomatol, Ctr Digital Dent, Dept Prosthodont, Clin Div 2, Beijing 100081, Peoples R China
[2] Natl Ctr Stomatol, Beijing 100081, Peoples R China
[3] Natl Clin Res Ctr Oral Dis, Beijing 100081, Peoples R China
[4] Natl Engn Res Ctr Oral Biomat & Digital Med Device, Beijing 100081, Peoples R China
[5] Beijing Key Lab Digital Stomatol, Beijing 100081, Peoples R China
[6] Minist Hlth, Res Ctr Engn & Technol Computerized Dent, Beijing 100081, Peoples R China
[7] Peking Univ Sch & Hosp Stomatol, Ctr Digital Dent, Dept Prosthodont, Beijing 100081, Peoples R China
[8] Peking Univ Sch & Hosp Stomatol, Clin Div 2, Beijing 100081, Peoples R China
[9] Peking Univ Sch & Hosp Stomatol, Denture Proc Ctr, Beijing 100081, Peoples R China
关键词
Marginal fit; Absolute marginal discrepancy; Digital evaluation; Fixed dental prostheses; INTERNAL FIT; CLINICAL-EVALUATION; IMPRESSIONS; PRECISION; COPINGS; CROWNS;
D O I
10.1186/s12903-023-03620-9
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
BackgroundIn clinical practice, control of the marginal fit of fixed dental prostheses is hindered by evaluation method, which needs to be further improved to increase its clinical applicability. This study aimed to quantitatively analyze the absolute marginal discrepancy of three-unit ceramic fixed dental prostheses fabricated by conventional and digital technologies using a digital measurement method based on the digital impression technology and open source software.MethodsA digital workflow and the conventional impression combined with the lost-wax heat-pressed technique were adopted to separately fabricate 10 glass ceramic fixed dental prostheses. Three-dimensional data for the abutments, fixed dental prostheses, and fixed dental prostheses seated on the abutments, were obtained using a dental scanner. The two datasets were aligned using registration technology, specifically "multi-points registration" and "best fit alignment," by reverse engineering software. Subsequently, the three-dimensional seated fit between the fixed dental prostheses and abutments were reconstructed. The margin of the abutment and crown was extracted using edge-sharpening and other functional modules, and the absolute marginal discrepancy was measured by the distance between the margin of the abutment and crown. One-way analysis of variance was used to statistically analyze the measurement results.ResultsUsing the digital measurement method, the mean value of absolute marginal discrepancy for fixed dental prostheses fabricated by the conventional method was 106.69 +/- 6.46 mu m, and that fabricated by the digital workflow was 102.55 +/- 6.96 mu m. The difference in the absolute marginal discrepancy of three-unit all-ceramic fixed dental prostheses fabricated using the two methods was not statistically significant (p > 0.05).ConclusionsThe digital measurement method for absolute marginal discrepancy was preliminarily established based on open source software and applied in three-unit ceramic fixed dental prostheses. The absolute marginal discrepancy of three-unit ceramic fixed dental prostheses fabricated using digital technology was comparable to that of conventional technique.
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页数:7
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