[Clinical and experimental study on the reattachment of fractured anterior teeth].
OBJECTIVE
To evaluate the clinical results of three bonding patterns for the reattachment of anterior fractured teeth.


METHODS
The reattachment of 59 anterior fractured teeth was performed using three bonding patterns, which were pattern A (pulp chamber concave + labial chamfer), pattern B (pulp chamber concave + lingual notch) and pattern C (pulp chamber concave + lingual notch + labial chamfer), and followed up for more than 24 months. Pattern A, B and C were 14 teeth, 14 teeth and 31 teeth, respectively. Twenty-one sectioned maxillary central incisors (obtained from patients with periodontal disease) whose edge fragments reattached using the three bonding patterns were used for the experimental study of shear bond strength, and each pattern was used in 7 teeth.


RESULTS
Three reattached teeth fractured again due to another trauma, two of which was pattern B and one was pattern A. The reattachment of the remaining 56 anterior fractured teeth was successful after a follow up of mean 28.3 months. The experimental study showed that bonding pattern A and C could bear more shear stress than bonding pattern B (F = 5.161, P = 0.017).


CONCLUSIONS
The present study suggests that bonding pattern A (pulp chamber concave + labial chamfer) and C (pulp chamber concave + lingual notch + labial chamfer) were the best methods for the reattachment of fractured anterior teeth.
Zheng
Shu-guo
SG
Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China. zhengsg@public.bta.net.cn
Zheng
Gang
G
Si
Wu-qiang
WQ
Zhu
Jun-xia
JX
D000293:Adolescent; D002648:Child; D001840:Dental Bonding / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D066298:In Vitro Techniques; D007180:Incisor / Q000293:injuries*; D008297:Male; D008875:Middle Aged; D033081:Shear Strength; D019228:Tooth Crown / Q000293:injuries*; D014082:Tooth Fractures / Q000628:therapy*