老年人烤瓷修复中桥体龈端形态对牙槽嵴黏膜的影响

The influence of pontic shape on the mucosa tissue of alveolar ridge in PFM restorations of old patients

目的探讨老年人烤瓷修复中桥体龈端形态对牙槽嵴黏膜的影响。方法对150例老年人单个后牙缺失患者随机分组,进行船底式桥体和改良鞍式桥体设计,行钴铬烤瓷冠桥修复。修复后6～12个月复诊,检查不同桥体龈端形态设计的修复体牙槽嵴黏膜的红肿情况及桥体区食物滞留情况。结果修复后6～12个月,船底式桥体牙槽嵴黏膜红肿发生率明显低于改良鞍式桥体设计(χ2=5.79,P<0.05),桥体区食物滞留发生率略低于改良鞍式桥体(χ2=1.19,P>0.05),但差异无统计学意义。结论船底式桥体可以有效保护桥体黏膜组织,是老年人烤瓷桥修复的理想桥体设方式。

Objective To investigate the influence of pontic shape on the mucosa tissue of alveolar ridge in PFM restorations of old patients. Methods 150 old patients with single posterior tooth missing were divided into two groups randomly and restored with Co-Cr PFM bridge with two types of pontic designs respectively, namely bullet-shape pontic and modified saddle-shape pontic. Patients were followed up 6 - 12 months after restoration, the condition of food stickiness and the incidence of inflammation in mucosa tissue were examined. Results 6 - 12 months after restoration, inflammation rate of mueosa tissue in bullet-pontic group was significantly lower than that of modified saddle-shaped pontie group （X^2=5.79,P 〈 0.05）. The incidence of food stickiness in bullet-shape pontic group was lower than that in modified saddle-shape pontic group （X^2=l.19,P 〉 0.05）, but without statistical difference. Conclusion Bullet-shape pontie design was beneficial for protecting mucosa tissue, and was an ideal choice for PFM bridge in old patients.