ANALYSIS OF STRESS DISTRIBUTION IN DIFFERENT FINISHING LINES OF SINGLE ALL-CERAMIC CROWNS / ANÁLISE DA DISTRIBUÇÃO DE TENSÕES EM DIFERENTES TERMINAÇÕES CERVICAIS DE COROAS UNITÁRIAS TOTALMENTE CERÂMICAS

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

This work presents a finite element analysis of the stress distribution in teeth restored by single all-ceramic crowns with different types of finishing lines. In order to obtain the 2-D numerical model, three models of the mandibular molar teeth region were created considering a real anatomic piece and were then used to simulate the application of all-ceramic crowns with different finishing lines on the second molar. The selected material for the restorations was a ceramic material reinforced by lithium disilicate and the finishing lines adopted were shoulder, rounded shoulder and chamfer type. Aiming to realize a more careful analysis of the stress distributions associated with the different finishing lines, the same model was created in a completely healthy condition, i. e., in the absence of any kind of restoration. The numerical simulation was carried out by the ANSYS 7.0 software loading the models with 400 N distributed by the teeth´ thickness and applied according to the cusp-crest relationship at points in the teeth´ oclusal surfaces. The vectors corresponding to the applied forces were oriented towards the former-inferior mandibular region at the angle of 15o. The results indicated that the restoration involving the all-ceramic crown with the shoulder type finishing line intensified the stress in the restored molar tooth, followed by the all-ceramic crown with the rounded shoulder. On the other hand, the all-ceramic crown with the chamfer type finishing line caused a more homogeneous stress distribution in the restored molar tooth.

ASSUNTO(S)

bioengineering finite element method bioengenharia dentistry metodo dos elementos finitos terminacao cervical de coroas cervical ends odontologia biomaterials biomateriais

ACESSO AO ARTIGO

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