Masseter muscle activity of conventional denture, fixed prosthesis, and milled bar overdenture used for All-on-4 implant rehabilitation: A within-subject study.

Autor: ELsyad MA; Department of Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt., El-Asfahani IA; Department of Removable Prosthodontics, Faculty of Dentistry, Minia University, Minia, Egypt., Kortam SA; Department of Removable Prosthodontics, Faculty of Dentistry, Beni Suef University, Beni Suef, Egypt., Mourad SI; Department of Oral surgery, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
Jazyk: angličtina
Zdroj: Clinical implant dentistry and related research [Clin Implant Dent Relat Res] 2021 Jun; Vol. 23 (3), pp. 408-416. Date of Electronic Publication: 2021 Feb 18.
DOI: 10.1111/cid.12987
Abstrakt: Purpose: to examine the electromyographic (EMG) activity of the masseter muscles in patients with conventional dentures and compare it to EMG activity of fixed prosthesis, and milled bar overdentures used to rehabilitate mandibular atrophied ridges according to the All-on-4 concept.
Methods: Eighteen edentulous subjects with atrophied mandibles received complete dentures (CD, control). After 3 months, four implants were installed between the mental foramina according to the "All-on-4" protocol and loaded immediately. After osseointegration, fixed prostheses (FPD) or milled bar overdentures (MBO) were given to the patients in random order. Primary (amplitude), and secondary (chewing rate, time of the masticatory cycle, time of masticatory burst, and masticatory time) outcomes were evaluated 3 months after using CD, FPD, and MBO. The evaluations were made during mastication of carrot (hard) and cake (soft) foods.
Results: FPD and MBO were associated with a significantly higher (amplitude, time of masticatory cycle, and time of masticatory burst), and significantly lower (chewing rate and masticatory time) compared with conventional dentures. Primary and secondary outcomes did not differ between FPD and MBO. Carrot had significantly higher amplitude, chewing rate, time of masticatory burst, and masticatory time than cake, while cake had a significantly higher time of masticatory cycle than carrot.
Conclusions: Within limitations of this study, milled bar overdentures for All-on-4 implant rehabilitation of atrophied mandible is not less efficient than fixed prostheses in terms of electromyographic activity of the masseter muscle. Both prostheses significantly improve muscle activity, chewing rate, time of masticatory cycle, time of masticatory burst, and masticatory time compared with conventional dentures.
(© 2021 Wiley Periodicals LLC.)
Databáze: MEDLINE
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