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目的研究全瓷牙修复过程中颈缘位置设定对牙周组织保护的影响。方法选择2014年5月至2015年5月徐州市口腔医院收治的单颗牙牙体缺损患者60例,分为A、B、C 3组,每组20例;A组修复体颈缘位于龈上,B组颈缘平齐龈缘,C组颈缘位于龈下,均采用全瓷牙修复;在烤瓷牙修复过程中,注意保护牙周组织;于修复前及修复后1年行牙周状况检查,进行CI、PLI、GI的测定,并进行分析。结果龈上组全瓷冠修复后患牙的牙周指标CI、PLI、GI与修复前比较,差异无统计学意义t分别=0.398、0.547、1.135(P均>0.05),齐龈全瓷冠修复后患牙的牙周指标CI、PLI、GI与修复前比较,差异无统计学意义(t分别=0.363、0.923、0.818,P均>0.05),龈下组全瓷冠修复后患牙的牙周指标CI、LI、GI与修复前比较,差异有统计学意义(t分别=2.958、6.896、4.291,P均<0.01)。结论全瓷冠修复过程中颈缘位于龈上组、平齐龈缘组对修复后的牙周组织无明显影响,龈下组研究发现对于修复后的牙周组织有明显不利影响。
Objective To study the effect of setting of cervical margin on the protection of periodontal tissue in all-ceramic tooth restoration. Methods Sixty patients with single tooth defects admitted to the Dental Hospital of Xuzhou from May 2014 to May 2015 were divided into three groups: A, B and C, 20 cases in each group. A group , Group B margin margin of gingival margins, group C cervical margin located in the subgingival, are all porcelain teeth repair; porcelain teeth in the repair process, pay attention to the protection of periodontal tissue; in the repair and repair 1 year after the periodontal Condition examination, determination of CI, PLI, GI, and analysis. Results There was no significant difference of CI, PLI and GI in the periodontal index of the affected teeth after the restoration of all-ceramic crowns with all-ceramic crowns (t = 0.398, 0.547 and 1.135, respectively) (P> 0.05) (CI = 0.363,0.923,0.818, P> 0.05). The periodontal index CI, PLI and GI of the periodontal index of the subgingival crowded group were significantly higher than those of the control group LI, GI and before repair, the difference was statistically significant (t = 2.958,6.896,4.291, P <0.01). Conclusions The allograft is located in the supragingival margin during the all-ceramic crown restoration. There is no significant effect on the periodontal tissue after the restoration of the all-ceramic crown. The subgingival group has significant adverse effects on the periodontal tissue after the restoration.