Journal of Dental Research, Vol 73, 1096-1104, Copyright © 1994 by International & American Associations for Dental Research Online Journals

ARTICLES

Within-subject comparisons of implant-supported mandibular prostheses: psychometric evaluation

P. de Grandmont, J. S. Feine, R. Tache, P. Boudrias, W. B. Donohue, R. Tanguay and J. P. Lund
Universite de Montreal, Faculte de medecine dentaire, Departement de dentisterie de restauration, Centreville, Quebec, Canada.

In a within-subject cross-over clinical trial, psychometric and functional measurements were taken while 15 completely edentulous subjects wore mandibular fixed prostheses and long-bar removable implant-supported prostheses. In this paper, the results of a psychometric assessment are presented. Eight subjects first received the fixed bridge and seven the removable type. After having worn a prosthesis for a minimum of two months, subjects responded to psychometric scales that measured their perceptions of various factors associated with prostheses. They also chewed test foods while masticatory activity was recorded. The prostheses were then changed and the procedures repeated. At the end of the study, patients were asked to choose the prosthesis that they wished to keep. Patients assigned significantly higher scores, on visual analogue scales, to both types of implant-supported prostheses than to their original conventional prostheses for all factors tested, including general satisfaction. However, no statistically significant differences between the two implant-supported prostheses were detected except for the difficulty of chewing carrot, apple, and sausage. For these foods, the fixed prostheses were rated higher. Subjects' responses to category scales were consistent with their responses to the visual analogue scales. These results suggest that, although patients find the fixed bridge to be significantly better for chewing harder foods, there is no difference in their general satisfaction with the two types of prostheses.

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