Prague Medical Report is an English quarterly published multidisciplinary biomedical journal. Prague Medical Report was founded as Sborník lékařský in May 1885. The journal presents public primary scientific publications, short communications, casuistry, and reviews. It contains articles based on important specialised lectures and symposia.

PRAGUE MEDICAL REPORT, Vol 121 No 2 (2020), 87–95

Osteoarthrosis: Analyze of the Molar Bite Force, Thickness and Masticatory Efficiency

Mariah Acioli Righetti, Oswaldo Luiz Stamato Taube, Marcelo Palinkas, Lígia Maria Napolitano Gonçalves, Danilo Stefani Esposto, Edneia Corrêa de Mello, Isabela Hallak Regalo, Simone Cecilio Hallak Regalo, Selma Siéssere

announced: 17. 06. 2020


Osteoarthrosis is a disorder of synovial joints, resulting from destruction of the cartilage and subchondral bone. The present study is aimed to investigate the molar bite force, thickness and efficiency of the masseter and temporalis muscles of subjects with osteoarthrosis. A total of forty-eight subjects participated in the study. They were distributed into two groups: with osteoarthrosis (n=24) and asymptomatic controls (n=24). Subjects were analyzed on the basis of maximal molar bite force (right and left side), thickness (mandibular rest and dental clenching in maximal voluntary contraction) and electromyographic activity of masticatory cycles through the linear envelope integral in habitual (raisins and peanuts) and non-habitual (Parafilm M) chewing of the masseter and temporalis muscles. All the data were analyzed statistically using t-test with a significance level of p≤0.05. There was no difference between groups in maximal molar bite force, muscle thickness and non-habitual chewing. Differences were found on the raisins (p=0.02) and peanuts (p=0.05) chewing for right temporal muscle, with reduced masticatory muscle efficiency in osteoarthrosis subjects. This study showed that osteoarthrosis induces negative changes in habitual chewing, highlighting the efficiency of the right temporalis muscles. The greater temporal muscle activity in subjects with osteoarthrosis may compromise chewing and consequently the nutritional status of adult subjects.

keywords: Osteoarthrosis; Bite force; Thickness; Myoelectric activity; Masticatory muscles

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Osteoarthrosis: Analyze of the Molar Bite Force, Thickness and Masticatory Efficiency is licensed under a Creative Commons Attribution 4.0 International License.

167 x 240 mm
published: 4 x per year
print price: 450 czk
ISSN: 1214-6994
E-ISSN: 2336-2936