口腔固定修复金属材料对MRI成像伪影及种植体周围组织健康的影响

Effects of metal materials for oral fixation and restoration on magnetic resonance imaging artifacts and the health of tissues around dental implants

目的探讨口腔固定修复金属材料对MRI成像伪影及种植体周围组织健康的影响。方法选择2018年5月—2020年6月口腔固定修复患者153例,按照随机数字表法分为A组(钴铬合金,n=31)、B组(镍铬合金,n=32)、C组(钛合金,n=28)、D组(纯钛,n=29)和E组(金合金,n=33)。比较5组金属全冠伪影最大面积和涉及层数;评估修复后6个月的牙周探诊深度(probing depth,PD)、改良菌斑指数(modified plaque index,mPLI)、改良龈沟出血指数(modified sulcus bleeding index,mSBI)和龈乳头指数(papilla index,PI)。采用SPSS 22.0软件包对数据进行统计学分析。结果单因素方差分析显示,5组金属全冠伪影最大面积和涉及层数相比,差异有统计学意义(P<0.05);两两比较显示,E组的金属全冠伪影最大面积和涉及层数显著低于其他4组(P<0.05)。单因素方差分析显示,5组PD、mPLI、mSBI和PI相比,差异无统计学意义(P>0.05);两两比较显示,A组与B、C、D、E组的PD、mPLI、mSBI和PI相比,差异无统计学意义(P>0.05)。结论口腔固定修复金属材料产生的伪影与材料类型密切相关,其中,钴铬合金产生的伪影最大,金合金产生的伪影最小。采用金属材料进行口腔固定修复,不会对种植体周围组织健康造成不良影响。

PURPOSE:To investigate the effects of metal materials for oral fixation and restoration on magnetic resonance imaging artifacts and the health of tissues around dental implants.METHODS:A total of 153 patients undergoing fixed oral restoration were selected from May 2018 to June 2020.They were divided according to the random number table method into group A(cobalt-chromium alloy,n=31),group B(nickel-chromium alloy,n=32),group C(titanium alloy,n=28),group D(pure titanium,n=29)and group E(gold alloy,n=33).The largest area of metal crown artifacts and the number of layers of the 5 groups were compared.The probing depth(PD),modified plaque index(mPLI),modified sulcus bleeding index(mSBI)and papilla index(PI)6 months after restoration were evaluated.The data were statistically analyzed with SPSS 22.0 software package.RESULTS:One-way ANOVA showed that the largest area of metal crown artifacts and the number of layers involved in the 5 groups had significant differences(P<0.05).Pairwise comparison showed that the largest area of metal crown artifacts,and the number of involved layers in group E were significantly lower than those in groups A,B,C,and D(P<0.05).One-way ANOVA showed that there was no significant difference in PD,mPLI,mSBI and PI among 5 groups(P>0.05).Pairwise comparison showed that there was no significant difference in PD,mPLI,mSBI and PI between group A and group B,C,D and E(P>0.05).CONCLUSIONS:The artifacts produced by metal materials for oral fixation and restoration are closely related to the types of metal materials.Among them,cobalt-chromium alloys produce the largest artifacts,and gold alloys produce the smallest artifacts.The use of metal materials for oral fixation and restoration will not affect the health of tissues around dental implants.