镍铬合金烤瓷冠修复上颌切牙对牙周组织的影响

目的 了解采用镍铬合金烤瓷冠修复对患牙牙周组织的影响。方法 选择临床病例13例,前牙区咬合关系基本正常。采用镍铬合金烤瓷冠修复上颌切牙17颗,患牙的对侧同名牙为健康天然牙作为对照。烤瓷冠戴入6-8个月后复诊,进行牙周状况的临床检查,分别取患牙及其对侧同名牙的龈沟液,进行龈沟液量的测定,并对龈沟液内的肿瘤坏死因子(TNF-α)和弹性蛋白酶(EA)进行分析。结果 修复体边缘的深度及密合度均符合临床要求,修复后患牙的菌斑指数没有明显改变,但探诊深度、龈沟内出血指数、龈沟液量、龈沟液内TNF-α及EA含量增高。结论 临床合格的镍铬合金烤瓷冠修复对患牙牙周组织有不利影响。

Effects of Ni-Cr Based Porcelain-fused-metal (PFM) Crown on Gingival Health of the Restored Teeth

Objective To detect the effects of Ni - Cr based PFM crown on the periodontal tissue of the restored teeth. Methods Among 13 patients, 17 maxillary incisors possessed Ni - Cr based PFM crowns with subgingival margins, and were selected for the study. The con-tralateral homonymy natural teeth were healthy and treated as control teeth. The patients were followed up 6 to 8 months after the placement of the crowns. The gingival crevicular fluid (GCF) samples were collected by filter paper strips. The weight of GCF and the concentrations of GCF TNF-aaaaaaaaaaaaa and GCF - EA were detected. Then the clinical parameters such as plaque index, probing depth and sulcus bleeding index were recorded for the test teeth and matched ones. Results All the restorations were clinically accepted, either in marginal depth or in marginal discrepancies. There were significant differences in clinical parameters( except for plaque index) and GCF parameters between test and control teeth. Conclusion Although clinically accepted, Ni-Cr based PFM crown has negative influences on gingival health of the restored teeth.