Botulinum toxin for modulating the muscle strength of patients rehabilitated with zygomatic implants

Authors

  • Alexander D'Alvia Salvoni Faculty of Dentistry of São Paulo Dental Surgeons Association (FAOA / APCD) - São Paulo – SP - Brazil. http://orcid.org/0000-0002-3250-1905
  • Talita Fakhouri Salvoni Faculty of Dentistry of São Paulo Dental Surgeons Association (FAOA / APCD) - São Paulo – SP - Brazil. http://orcid.org/0000-0002-7170-7308
  • Leonardo Silva Gomes Kamezawa São Paulo State University (Unesp) - Institute of Science and Technology, sâo José dos Campos - Department of Dental Materials and Prosthodontics - São José dos Campos – SP - Brazil. http://orcid.org/0000-0002-0546-7000
  • José Benedito de Oliveira Amorim São Paulo State University (Unesp) - Institute of Science and Technology, São José dos campos - Department of Biosciences and Oral Diagnosis - São José dos Campos – SP - Brazil. http://orcid.org/0000-0002-8868-8705
  • Clóvis Pagani São Paulo State University (Unesp), Institute of Science and Technology, São José dos campos - Department of Restaurative Dentistry - Sao Jose dos Campos – SP - Brazil. http://orcid.org/0000-0002-1074-5319

DOI:

https://doi.org/10.14295/bds.2019.v22i2.1657

Abstract

Objective: To measure the intensity of muscle strength and electrical activity of masseter and anterior temporal muscles based on BTX-A therapy in patients rehabilitated with total prostheses on zygomatic implants. Material and Methods: The object of the study was a sample of 20 individuals subjected to zygomatic implant surgery and rehabilitated with implant-supported prostheses, in order to obtain electromyographic data using an eight-channel module (EMG System do Brasil). The data were collected for three consecutive months: prior to the application (single dose) of BTX-A (30 U/ masseter muscle; 10 U/temporal muscle) and after 30 and 90 days of therapeutic treatment. Result: All muscle groups studied showed reduction of muscle electrical activity during voluntary contraction after 30 days of treatment (around 47%) (p < 0.001), which progressively reverted after 90 days of treatment. The anterior temporal muscles presented similar motor behavior, with activity reduction of 39% (p < 0.05). There was a reduction of 17.68% (p < 0.05) in mandibular force and an increase of 14.22% (p < 0.05) in mouth opening after 30 days of BTX-A administration. Conclusions: The results suggest that BTX-A significantly reduces muscle activity, in either the recruitment of motor units or muscle tone, in the first three months of therapeutic treatment. This therapy may also be useful as a preventive method for the failure of zygomatic implant-supported prostheses.

Keywords

Electromyography; Dental implants; Prostheses on implants; Botulinum toxin.

Keywords: Electromyogra phy; Dental implants; Prostheses on implants; Botulinum toxin.

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Published

2019-04-30

Issue

Vol. 22 No. 2 (2019): Apr. - Jun. / 2019 - Published April 2019

Section

Clinical or Laboratorial Research

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