摘要
目的探讨修复年轻恒前牙冠折的简便过渡性方法。方法临床上共对59颗冠折患牙的牙冠进行粘接,按粘接模式分为3组。其中A组(内部倒凹+唇侧洞斜面)14颗,B组(内部倒凹+舌侧排溢道)14颗,C组(内部倒凹+舌侧排溢道+唇侧洞斜面)31颗。选择21颗上颌中切牙的离体牙,按临床研究中的3种粘接模式分为3组,每组7颗,进行悬臂梁模型实验,探讨能够承受最大力值的粘接模式。结果临床研究显示,59颗断冠粘接的冠折牙齿有3颗脱落,其中2颗为B粘接模式,1颗为A粘接模式,均为二次外伤所致;其余56颗牙齿观察时间平均为28·3个月,断冠粘接后的牙齿均完好。实验研究显示,A、C粘接模式所能承受的力值明显大于B粘接模式(F=5·161,P=0·017),是目前临床上采取的主要方法。结论“内部倒凹+舌侧排溢道+唇侧洞斜面”以及“内部倒凹+唇侧洞斜面”的粘接模式,为前牙外伤断冠粘接的最佳方式,它能较好地恢复冠折牙的外观、形态及功能,是一种适合于临床恒前牙冠折的、简便的过渡性修复方法。
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.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2006年第12期719-722,共4页
Chinese Journal of Stomatology
关键词
牙折断
牙粘合
剪切强度
Tooth fractures
Dental bonding
Shear bond strength
