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Clinical evaluation of the effect of Ni-Cr alloy and Ti-Lite alloy porcelain fused metal crown in restoring anterior teeth.

HE Fei.Department of Stomatology,Wuhan Third Hospital,Hubei Wuhan 430060,China  
Objective:To observe and compare the clinical effect of Ni-Cr alloy porcelain fused metal crown(PFM) and Ti-Lite alloy PFM in restoring anterior teeth.Method:A total of 286 anterior teeth from 200 patients were restored,in which 143 teeth were restored with Ni-Cr alloy PFM,143 teeth were restored with Ti-Lite alloy PFM.follow,up one year,compare the change of shape and colour of the two crown and gingiva.Result:The clinical effect of Ni-Cr alloy PFM was as good as Ti-Lite alloy PFM when checked up after cementation at once.However,after one year,there are no diffirence of shape and colour of the two crown,37.1 % cases restored by Ni-Cr alloy PFM showed the change of gingival color and 21.7 % cases showed gingivitis,only 5.6 % cases restored by Ti-Lite alloy PFM showed the change of gingival color and 4.2 % cases showed gingivitis.Conclusion:The esthetic effect and the effection of periodontal tissue by Ti-Lite alloy PFM is better than Ni-Cr alloy PFM.
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