Bichectomy Surgery and EMG Masticatory Muscles Function in Adult Women: A Longitudinal Study.

AIM: This longitudinal study aimed to evaluate the electromyographic activity of the masseter and temporal muscles in adult women who underwent buccal fat removal. MATERIALS AND METHODS: The sample consisted of 20 healthy adult women with no temporomandibular dysfunction and normal occlusion, who were assessed before, 30, and 60 days after the surgery. The electromyographic signal of the masseter and temporal muscles was captured through mandibular tasks including rest, protrusion, right and left laterality, and maximum voluntary contraction with and without parafilm. The results obtained were tabulated and the Shapiro-Wilk normality test was performed, which indicated a normal distribution. Statistical analysis was performed using the repeated measures test (p < 0.05). RESULTS: Significant differences were observed between time periods in maximum voluntary contraction for the left masseter muscle (p = 0.006) and in maximum voluntary contraction with parafilm for the right temporal (p = 0.03) and left temporal (p = 0.03) muscles. CONCLUSION: Bichectomy surgery did not modify the electromyographic activity of the masseter and temporal muscles during the rest task but may have influenced variations in the electromyographic signal during different mandibular tasks after 60 days of surgery, suggesting compensatory adaptations and functional recovery. CLINICAL SIGNIFICANCE: Understanding the impact of buccal fat removal surgery on the stomatognathic system function provides insights into postoperative functional recovery and potential compensatory adaptations, guiding clinical management and rehabilitation strategies for patients undergoing such procedures. How to cite this article: Cardoso AHDLS, Palinkas M, Bettiol NB, et al. Bichectomy Surgery and EMG Masticatory Muscles Function in Adult Women: A Longitudinal Study. J Contemp Dent Pract 2024;25(3):207-212.

Relationship between Botulinum Toxin and Temporomandibular Dysfunction: a Literature Review / Relação Entre Toxina Botulínica e Disfunção Temporomandibular: uma Revisão Bibliográfica

Temporomandibular dysfunction (TMD) encompasses several conditions affecting the temporomandibular joint and jaw muscles, leading to orofacial pain and other symptoms. Botulinum toxin is a potential therapy for relieving pain, improving jaw function, and reducing the use of analgesics. This study aims to systematically illustrate the application of botulinum toxin in the therapeutic context of TMD. This study took the form of a literature review, in which an analysis of knowledge repositories was conducted, including Medline (U.S. National Library of Medicine), accessed via PubMed, as well as Lilacs (Latin American and Caribbean Literature in Health Sciences), Scielo (Scientific Electronic Library Online), and Google Scholar. The selection involved the inclusion of studies published from 2015 to 2023. The literature review identified botulinum toxin as an effective and safe therapeutic alternative for TMD patients. The manifestation of side effects, when reported, was predominantly mild and transient in nature, granting botulinum toxin the prospect of establishing itself as a promising therapeutic option in refractory cases to conventional approaches. However, it is important to emphasize the need for further studies and clinical trials to further consolidate the efficacy and safety associated with the use of botulinum toxin as a treatment for TMD. (AU)

A disfunção temporomandibular (DTM) engloba várias condições que acometem a articulação e os músculos da mandíbula, causando dor orofacial e outros sintomas. A toxina botulínica é uma potencial terapia para aliviar a dor, melhorar a função mandibular e reduzir o uso de analgésicos. Este estudo visa ilustrar de forma sistemática a aplicação da toxina botulínica no contexto terapêutico da DTM. Este estudo assumiu a forma de uma revisão bibliográfica, na qual foi realziado uma análise de repositórios de conhecimento, incluindo o Medline (Biblioteca Nacional de Medicina dos Estados Unidos), acessado por meio do PubMed, assim como o Lilacs (Literatura Latino-Americana e do Caribe em Ciências da Saúde), o SciELO (Scientific Electronic Library Online) e o Google Scholar. A seleção envolveu a inclusão de estudos publicados no período de 2015 a 2023. A revisão bibliográfica identificou a toxina botulínica como uma alternativa terapêutica eficaz e segura para pacientes com DTM. A manifestação de efeitos colaterais, quando relatados, revelou-se predominantemente de natureza branda e transitória, outorgando à toxina botulínica a perspectiva de se consagrar como um recurso terapêutico promissor em situações refratárias às abordagens convencionais. No entanto, é importante enfatizar a necessidade de estudos prévios e ensaios clínicos para uma maior consolidação da eficácia e segurança associadas à utilização da toxina botulínica como tratamento para a DTM. (AU)

Autologous Hematopoietic Stem Cell Therapy of the Subjects with Systemic Sclerosis: Electromyographic Results of the Masticatory Muscles.

Musculoskeletal system impairment is a major cause of functional alterations in subjects with systemic sclerosis. Autologous hematopoietic stem cell therapy (AHSCT) may have an important role in the treatment functional of systemic sclerosis patients. The aim of this pilot study was to assess whether AHSCT interferes with the electromyographic activity of the masseter and temporalis muscles of subjects with systemic sclerosis. Before transplantation, seven subjects with systemic sclerosis (mean age [± SD], 40.1 ± 9.6 years) underwent electromyographic analysis of the masseter and temporalis muscles in mandibular tasks at rest, right and left laterality, protrusion and maximum voluntary contraction. Two months after AHSCT, the subjects re-evaluated using the same methods. Data were analyzed using the repeated-measure test, with p<0.05 considered to be statistically significant. Two months after AHSCT, there was reduction in normalized electromyographic activity in the dental clenching in maximal voluntary contraction, with significant differences, for the left temporal muscle (p=0.04). AHSCT in subjects with systemic sclerosis promotes alterations in stomatognathic system function, especially those related to electromyographic activity of masticatory muscles.