Avaliação do remanescente dentinário em dentes preparados para coroas totais

Abstract

Introduction: Patients who require fixed prosthetic rehabilitation have been increase over the past decades. The dental reduction is not free of damage, although the conservative relationship to the pulp. It is not possible guarantee an amount of remaining dentin safety after their reduction and the final result are dependent on this term; so it is necessary clarify this subject. Objective: Quantify the remaining dentin and the dentin thickness reduction in the abutment teeth. Establish their relationships with clinical success like aesthetic satisfaction and complications. Materials and Methods: Retrospective, exploratory and descriptive study of mesial distal and bucco-palatal/lingual distances at crown and at cervical level of the abutment teeth collected in plaster models and panoramic radiographs of patients treated at the Clinic of Catholic University. We recorded permanent cementation date and the last control visit, presence of tooth vitality, existence of pulp complications, aesthetic satisfaction, gender and age. Statistical tests consisted of univariate and bivariate analysis using SPSS. The level of significance used was 95%. Results: The average of mesio-distal reductions in cervical level was 1.9 mm and in the crown was 2mm. In the bucco-palatal/lingual distance the average reduction was 2mm in cervical and crown areas. The reduction in the crown was statistically related with aesthetic satisfaction, p <0.05. The mean value for remaining dentin was 1.9 mm. The size of the pulp is influenced by the amount of remaining dentin, p <0.05. There were significantly more patients satisfied when the teeth were vital, p <0.05. There were no statistically significant results on the amount of remaining dentin about sex. Conclusion: Reductions made in abutment teeth did not cause any pulpal complication. The aesthetic satisfaction was related to greater bucco-lingual reduction. The thickness of the remaining dentin is according to the literature, it was inversely correlated with the dimension of the pulp chamber but not correlated with aesthetic. Patients with fixed prostheses on vital teeth are significantly more satisfied with their aesthetics.

Date of Award	4 Nov 2015
Original language	Portuguese
Awarding Institution	Universidade Católica Portuguesa
Supervisor	Helder José Martins Esteves (Supervisor) & Cláudia Sofia da Silva Mendes (Co-Supervisor)