Measurement and analysis of maxillary central incisor neck gingival contours morphology among three different shapes
Objective To measure the three-dimensional morphology of the cervical gingival contour of tapered,oval and square maxillary central incisor,and to provide references for the establishment of the database of the key areas of implant restoration in different shapes of central incisors.Methods A total of 100 patients were selected who were treated in the prosthetics Department of Stomatology Hospital of Hebei medical university from January 2020 to December 2022,and underwent CBCT imaging examination.New Tom Viewer software was used to measure the height of proximal and distal gingival profile,angle of penetrating gingival profile,top diameter,labial enamel cementum and 1.5mm circumference diameter of crown square.The measurement results were analyzed using SPSS19.0 software.Results ①Oval group:the diameter of the papilla apex was 7.61±0.67 mm,the height of the mesial papilla was 3.56±0.38 mm,and the height of the distal papilla was 3.17±0.25 mm.The mesial angle was 13.42±3.24° and the distal angle was 19.19±3.28°.The circumference of enamel cementum line(CEJ)was 20.07±1.70 mm;the outer 1.5 mm circumference diameter 21.41±1.78 mm.②Square group:the diameter of gingival papilla apex was about 7.43±0.45mm;the height of mesial papillae was 3.21±0.60 mm and distal papillae was 2.70±0.60 mm.The mesial penetration angle was 11.80±5.31°,and the distal penetration angle was 18.81±3.45°.The circumference of enamel cementum line(CEJ)was 20.58±1.27 mm,and the outer 1.5 mm circumference diameter 22.02±2.06 mm.③The tapered group:the diameter of gingival papilla apex was about 7.19±0.43 mm;The height of mesial papilla and distal were 4.46±0.40 mm and 3.66±0.55 mm.The mesial penetration angle was 11.16±2.07° and the distal was 18.52±3.68°.The circumference of enamel cementum line(CEJ)was 19.32±1.05 mm,and the outer 1.5mm circumference diameter was 21.03±1.59 mm.④ The height of mesial and distal gingival papillae,the angle of gingival penetration,and the circumference of enamel cementum line(CEJ)and the outer 1.5 mm,(CEJ)in the groups were all less than 0.05,which had statistical significance.Among the 3 groups,the height of proximal and distal gingival papillae and the angle of gingival were different,and there were statistical differences.The angle of gingival perforation in square group shape was the largest and the distance between adjacent area and alveolar ridge was the smallest,there is no significant difference was found.Conclusion The obtained data provide references for the design and development database of the forming base of the gingival contour area and the neck shape of the prosthesis,which can help the clinical surgeons to improve the aesthetic effect of the anterior tooth area.
Conical Beam CTTooth neck 3D morphologyPersonalized baseCentral incisor morphologyGingival profile
万方数据
维普
