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目的探讨可摘局部义齿的不同设计与基牙致龋的关系。方法选择2005年6月至2007年12月南阳市口腔医院修复科收治的需进行可摘局部义齿修复的患者156例,根据患者牙列缺损的情况,按照Kennedy分类法设计混合支持式义齿和黏膜支持式义齿2种不同形式的修复体,在患者戴入义齿前及戴入义齿后3年、5年分别对基牙牙体组织进行龋病检查及卫生状况检查。结果不同设计形式的修复体与基牙健康密切相关,同种支持形式的4类牙列缺损修复设计之间虽有差别,但差异无统计学意义(P>0.05);而黏膜支持式义齿引起基牙患龋率明显高于混合支持式义齿,差异有统计学意义(P<0.05)。可摘局部义齿修复患者,口腔卫生状况差者的患龋率明显高于口腔卫生状况优良者,差异有统计学意义(P<0.05)。结论可摘局部义齿的设计与制作不合理,患者戴于口内,如果口腔卫生又差,则会造成基牙和相邻牙龋坏,不仅影响口腔甚至影响全身健康。
Objective To explore the relationship between different designs of removable partial dentures and caries-induced decay. Methods From June 2005 to December 2007, Nanyang Stomatology Hospital, Dept. of Dentistry, 156 patients with removable partial dentures were selected. According to Kennedy’s classification of dentition defects, mixed support dentures and mucosa Support denture 2 kinds of different forms of prosthesis, before wearing the denture patients and wearing dentures after 3 years, 5 years dental caries and dental hygiene examination. Results There was no significant difference between the four types of dentition defect repair with the same kind of supportive forms (P> 0.05), but the mucosal supporting denture The dental caries prevalence rate was significantly higher than mixed support denture, the difference was statistically significant (P <0.05). In the patients with removable partial denture, the prevalence of dental caries in those with poor oral hygiene status was significantly higher than that in oral health status, with significant difference (P <0.05). Conclusion The design and manufacture of the removable partial dentures are unreasonable. The patients wear in the mouth. If the oral hygiene is poor, they will cause decay of abutments and adjacent teeth, not only affecting the oral cavity but also affecting the general health.