Int J Stomatol

Inter J Stomatol ›› 2012, Vol. 39 ›› Issue (5): 565-567.doi: 10.3969/j.issn.1673-5749.2012.05.002

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Destructive analysis on porcelain laminate veneers of different designs

Liu Tianshuang1, Fan Cheng2, Li Zhenchun3, Chen Xiaodong3.   

  1. 1. Dept. of Special Diagnosis, Dalian Stomatological Hospital, Dalian 116021, China; 2. Center for Material Failure Modeling Research, Dalian University, Dalian 116622, China; 3. Dept. of Prosthodontics, Dalian Stomatological Hospital, Dalian 116021, China
  • Received:2011-08-15 Revised:2012-06-12 Online:2012-09-01 Published:2012-09-01

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Abstract:

Objective To study the destructive process of porcelain laminate veneers of different designs by using real fracture process analysis（RFPA） software. Methods The labial-lingual sections of upper central incisor were modeled by using RFPA. The destructive processes of twelve porcelain veneer models with four different designs: I type, L type, U type and veneer crown type, were analyzed by RFPA. Results Breakage of cement layer appeared in the first instance under edge to edge load. I type and L type design showed breakage location was at the incisal edge between the veneer and the abutment. U type and veneer crown type design showed breakage location was at the lingual edge between the veneer and the abutment or shoulder edge. Model of L type design supported lower load than the others. Conclusion Choosing high strength cement would raise the strength of veneer-tooth complex. Model of L type design supported lower load than the others at edge to edge conclusion.

Key words: porcelain laminate veneer, two-dimensional finite element analysis, real fracture process analysis


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