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Journal of Dental Research
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Clinical

Speech with Maxillary Implant Prostheses: Ratings of Articulation

G. Heydecke1,2, D.H. McFarland3,6, J.S. Feine1,4,5 and J.P. Lund1,6,*

1 Faculty of Dentistry, McGill University, 3640 University Street, Montreal, Quebec H3A 2B2, Canada;
2 Department of Prosthodontics, School of Dentistry, Albert-Ludwigs University, Freiburg, Germany;
3 École d’orthophonie et d’audiologie, Université de Montréal, PQ, Canada;
4 Department of Epidemiology & Biostatistics and Occupational Health, Faculty of Medicine, McGill University;
5 Department of Oncology, Faculty of Medicine, McGill University; and
6 Centre de recherche en sciences neurologiques, Université de Montréal, Canada;

Correspondence: * corresponding author, james.lund{at}mcgill.ca

Speech is often perturbed after placement of maxillary implant-retained prostheses. We tested the hypothesis that the rate of speech errors varies with prosthetic design. Thirty edentulous subjects with mandibular implant prostheses entered two within-subject crossover trials. Subjects wore maxillary fixed prostheses and removable long-bar overdentures (Trial 1), or overdentures with and without palates (Trial 2). Test words from a French language speech battery were recorded after each prosthesis had been worn for two months. The percentages of stops, fricatives, and vowels correctly perceived by lay judges were calculated. Subjects produced a significantly higher percentage of sounds correctly with overdentures than with fixed prostheses. Between-treatment differences were significant for stops and fricatives (p < 0.01), but not for vowels. There were no significant differences in error rates between the two overdentures. In conclusion, maxillary implant overdentures with and without palates enable patients to produce more intelligible speech than fixed prostheses.

Key Words: dental implants • overdentures • clinical trial • maxillary prostheses • speech

Journal of Dental Research, Vol. 83, No. 3, 236-240 (2004)
DOI: 10.1177/154405910408300310
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