Limites de movimentos mandibulares em crianças

Abstract

Background: identification of the mandibular movement range is an important procedure in the evaluation of the stomatognathic system. However, there are few studies in children that focus on normal parameters or abnormalities. Aim: to determine the average range of mandibular movements in Brazilian children aged 6 to 12 years; to verify the difference between genders, in each age group, and between the different age groups: 6-8 years; 8.1-10 years; and 10.1-12 years. Method: participants of the study were 240 healthy children selected among regular students from local schools of São Paulo State. The maximum mandibular opening, lateral excursion and protrusive movements, and deviation of the medium line, if present, were measured using a digital caliper. Student T test, Analysis of variance and Tukey test were considered significant for p < 0.05. Results: the mean values observed in the studied sample were: 44.51mm for maximum mandibular opening; 7.71mm for lateral excursion to the right; 7.92mm for lateral excursion to the left; 7.45mm for protrusive movements. No statistical difference was observed between genders. There was a gradual increase in the range of mandibular movements, with significant differences mainly between the ages of 6-8 years and 10.1-12 years. Conclusion: during childhood the range of mandibular movements increases. Age should be considered in this analysis for a greater precision in the diagnosis.

Fatores que interferem na amplitude dos movimentos mandibulares em crianças

“…Unlike what was found in studies in children, researches show statistically significant differences between genders in populations comprised of adolescents 17 and adults 9 , revealing that sexual maturity, in which the differentiation of various physical characteristics of humans occurs, seems to be impactful, also, regarding the mandibular range of motion 10,16 .…”

“…Taking into account the obtained and commented results so far, it should be noted that scientific research to MRM mentions more often MMO with a lack of analyzes involving the lateral excursions of the mandible and protrusion 10,14,18 .…”

“…During the clinical examination, the limitations of mandibular movements represent an important signal for understanding the diagnosis of TMD 10 . Thus, knowledge about the mandibular range of motion (MRM) has been the subject of interest of many researchers 3,10,11 , because this is a relevant tool for the assessment of masticatory functional status 10,12 .…”

“…Thus, knowledge about the mandibular range of motion (MRM) has been the subject of interest of many researchers 3,10,11 , because this is a relevant tool for the assessment of masticatory functional status 10,12 . In addition, this information enables a valuable follow-up parameter in the treatment of patients affected by TMD 11 .…”

“…Then it was asked the volunteer to protrude the jaw, sliding it against the maxilla, followed by measuring the horizontal distance from the buccal surface of the upper incisal to the incisal edge of the lower ones. The sum resulted in the jaw protrusion measurement 10 ; c) RL/LL: It was requested that the child promote maximum displacement of the jaw to the right and measured the horizontal distance between the dental midline of the upper central incisors and lower central ones or between the labial frenulum. The same procedure was used to measure the left lateral excursion 10 .…”