Alterações dimensionais mandibulares e sua relação com atividade muscular em pacientes portadores de próteses implantossuportadas / Mandibular dimensional changes and its relationship with muscular activity in pacients when implant-supported prosthesis are used

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Purpose: The purpose of the present study was to evaluate the correlation between masseter muscle activity and changes occurred in mandibular bone height, posterior to the last implant, one year after implant-supported prosthesis rehabilitation in repared cleft lip and palate patients. Materials and Methods: changes in mandibular bone height were measured in digitalized images of panoramic radiographies taken before and one year after oral rehabilitation of seventeen repared cleft lip and palate patients (Radiocef 2 Radiomemory). Parameters for electromyography of masseter muscle were: maximum voluntary isometric clench (MVC) for 5s, habitual chewing of carrots (HC) and unilateral right (URL) and left (ULL) chewing of latex. Results: a mean increase in mandibular bone height of 1,98mm (p<0,001) for the implant retained overdenture was observed. Bone apposition was higher in the right side. Significant increase in the amplitude was observed during HC (9V) and during ULL (19 V), regardless prosthesis type and side. A significant increase was observed during URL (19 V) for the implant retained overdenture. A significant statistical increase for the masticatory act was observed during the three types of mastication (HC=0,13s, URL=0,06s, ULL=0,12s), regardless prosthesis types. A significant statistical increase was observed for the masticatory cycle during HC (0,12s) and ULL (0,11s), regardless prosthesis type. Conclusion: Mandibular bone apposition in the posterior region to the last implant, in patients using implant retained overdentures and improvement in muscular activity in both types of prosthesis were observed, although no significant correlations were encountered between them.

ASSUNTO(S)

implantes endósseos bone resorption electromyography eletromiografia reabsorção óssea endosseous implant

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