Proximal contact areas and gingival embrasures of the maxillary anterior dentition in Shanghai adolescents: A morphology study
10.3724/SP.J.1008.2012.00570
- Author:
Chao-Yuan LI
1
Author Information
1. Tongji University School of Stomatology
- Publication Type:Journal Article
- Keywords:
Gingival embrasure;
Inlab;
Proximd contact areas;
Shape of tooth
- From:
Academic Journal of Second Military Medical University
2012;33(5):570-572
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the morphology of proximal contact areas (PCA) and gingival embrasures of the maxillary anterior dentition in Shanghai adolescents, hoping to provide evidence for clinical treatment of maxillary anterior tooth esthetic restoration. Methods Totally 62 dental models of Shanghai adolescents with normal occlusion were collected with silicon rubber, and each case was scanned by Sirona inlab inEos Blue and measured by CAD/CAM bundled software. The collected data were analyzed by SPSS18.0 software. Results The mean proximal contact area proportion (PCAP) between central incisors (CI-CI), central and lateral incisors (CI-LI), and lateral incisors and canines (LI-CA) were (47. 7 ± 5. 1) %, (34.6 ± 5.0)%, and (24. 2 ± 4. 2)% in central incisor of square shape, (43. 1 ± 3. 7)%, (31. 3 ± 4. 1)% and (22. 3 ± 3. 7)% in ovoid shape, and (38. 8 ± 5. 3)%, (33. 1 ± 5. 7)% and (23. 2 ± 3. 7)% in the tapered shape. Linear relation was found between PCA and clinic crown length of ipsilateral central incisor in the position of CI-CI and LI-CA in square and ovoid shapes. There were significant differences in the clinic crown length of central incisors (P<0. 01), midline papilla height (PH) (P<0. 01) and gingival embrasure angle (GEA) (P<0. 01) between different shapes of central incisor of square, ovoid, and tapering. Conclusion The shapes of central incisors are closely related to the PCAP, PH and GEA, which provides reference for clinical anterior and soft tissue restoration.
