后牙烤瓷桥两种不同龈底形态桥体对接触区粘膜的影响

Influence of Two Pontic Types of Posterior Teeth Porcelain-fused-to-metal Bridge on the Contacted Mucosa

目的探讨固定桥修复后牙缺失两种不同形态桥体对接触区粘膜的影响。方法选择门诊上单个后牙缺失、适合做双端固定桥修复的40例患者,随机分成两组,分别采用船底式和改良鞍式桥体制作双端烤瓷固定桥,试粘固3个月后复诊,取下修复体,观察桥底牙龈粘膜红肿、炎症情况,并询问患者戴用修复体后的口腔舒适程度。结果船底式桥体接触区粘膜炎症发生率明显低于改良鞍式桥体,有统计学差异(χ2=5.625,P<0.05)。患者戴用一段时间后,均无明显异物感。结论双端固定桥修复后牙缺失,采用船底式桥体优于改良鞍式桥体。

Objective To explore the influences of two different pontic types on the contacted mucosa in the single lost posterior teeth restoration. Methods 40 patients who lost single posterior teeth and adapted to employ rigid fixed bridge restoration were chosen, and then divided into two groups randomly. The ovate pontic and the modified base-type pontic design were used to make the rigid fixed bridge. 3 months after insertion fixed partial dentures were removed in order to observe the inflammation of the alveolar ridge mucosa under the pontics, meanwhile the comfortable degree of the denture was inquired. Results The inflammation rate in the mucosal areas under the ovate bridge was obviously lower than that of the modified base-type pontics, the difference was significant statistically （X^2= 5. 625 ,P〈0. 05）. The patients had no uncomfortable feeling after wearing the denture for a period of time. Conclusion To restore the single lost posterior teeth using the rigid fixed bridge, the ovate pontics is superior to the modified base-type pontics.