Clinical application effects of cast post and cores with traction design in coronal extrusion of upper anterior teeth with subgin-gival fracture
10.13591/j.cnki.kqyx.2025.04.007
- VernacularTitle:带牵引设计的铸造桩核冠向牵引龈下牙折上前牙的临床效果
- Author:
Tiejun FANG
1
;
Huimin LIANG
;
Minli HUANG
Author Information
1. 广东省中山市口腔医院种植修复中心,广东中山(528400)
- Publication Type:Journal Article
- Keywords:
anterior tooth;
orthodontic extrusion;
subgingival tooth fracture;
biological width
- From:
STOMATOLOGY
2025;45(4):275-280
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the clinical effects of cast post and cores with traction design in coronal extrusion of upper anterior teeth with subgingival fracture.Methods Twenty-five upper anterior teeth with subgingival fracture were treated by root canal therapy,then cast post and cores with traction design and composite resin crown restorations were made for orthodontic extrusion.Position reten-tion and gingival margin modification were performed before crown restoration of these teeth.The correlation between extrusion length and extrusion time was evaluated,as well as the correlation between extrusion length and migration distance in coronal direction about the gingival margin.Crown-root ratio and post-root ratio below the alveolar crest was evaluated after the crown restorations were finished.Evaluation of restoration effects was carried out in 3,6,12 months follow-up period.Results Root resorption began to appear on one tooth at six weeks;the remaining 24 teeth were migrated to target position and prosthesis were finished.There was a positive correlation between the extrusion length(x)and extrusion time(y1),also between the extrusion length(x)and migration distance in coronal di-rection about the gingival margin(y2)by statistical analysis.There was no significant difference(P＞0.05)between the extrusion teeth and compared teeth on crown-root ratio.More than 1/2 of the ratio between the length of post to the length of root below the alveolar crest.The prognostic stability was satisfied in 3,6,12 months follow-up period.Conclusion There are satisfactory clinical application effects of cast post and cores with traction design in coronal extrusion of upper anterior teeth with subgingival fracture.
