Bite force, occlusal contact area and masticatory efficiency before and after orthognathic surgical correction of mandibular prognathism

A influência de sintomas da disfunção temporomandibular na força máxima de mordida em indivíduos com deformidade dentofacial

“…It should be highlighted that no study has employed the anamnesis questionnaire used in this study, yet included clinical examination of the TMJ, visual analogue scale, anamnesis index and of dysfunction of Helkimo (21) , or applied the RDC/TMD protocol (22) . The MBF was reduced in individuals with DFD compared to CG, in agreement with reports in the literature (5,6,13,14,15) . It should be considered that dentofacial deformities cause Subtitle: GDFD = group with dentofacial deformity; CG = control group important changes in the physiology of the masticatory system, especially during presurgical orthodontic treatment, when there is worsening of occlusion, with loss of the physiological adjustments acquired along the lifetime (14) .…”

“…The MBF was reduced in individuals with DFD compared to CG, in agreement with reports in the literature (5,6,13,14,15) . It should be considered that dentofacial deformities cause Subtitle: GDFD = group with dentofacial deformity; CG = control group important changes in the physiology of the masticatory system, especially during presurgical orthodontic treatment, when there is worsening of occlusion, with loss of the physiological adjustments acquired along the lifetime (14) . Concerning the comparison of data of AQ with MBF, this study revealed negative and significant correlations between scores obtained on application of AQ and MBF when GDFD and CG were analyzed in combination, as well as specifically for GDFD, i.e.…”

“…Different authors observed predominance of signs and symptoms of TMD in individuals with DFD during presurgical orthodontic treatment compared to a control group (10,11,12) . The literature demonstrates reduced bite force values in individuals with DFD during presurgical orthodontic treatment, compared to a control group with normal occlusion and absence of signs and symptoms of TMD (5,13,14,15) . The relationship between pain and dynamic bite force control in individuals with DFD is not yet clear, since there is no consensus on how this dysfunction influences this aspect.…”

Análise da força de mordida nos diferentes tipos de maloclusões dentárias, segundo Angle

“…In the studies reported by Haradaet al, Iwase et al andBraber et al 9,10,12 , the authors assessed bite force, occlusion areas and chewing performance in prognathous and retrognathic patients, before and after orthognathic surgery, as well as in individuals with normal occlusion.Both studies verified that at the end of the follow-up period (that varied concluded that there was no statistically significant correlation of linear growth or decrease between the variables bite force and BMI.These findings are in agreement with those described in the study byBraun et al 3 , who conducted an investigation with the purpose of assessing the maximum human bite force and correlate it to several variables, among which are weight and height.The sample was composed of 142 individuals of both genders in between 26 and 41 years of age, and, in order to conduct the measurements, a transducer that measured the force in Newtons (N) was used. The correlation coefficients for weight and height were low.…”

“…Thus, the relationships between bite force and the type of dental occlusion have been studied for some time, without a present consensus in literature.Many studies justify that muscles, as well as teeth play an important role in the direction of the course of bite force and that muscle anatomy may both cause and reflect mandible movements and, thus the relative importance of the components of bite force may be associated to the different muscle anatomy of each one 4 .In addition, maximum bite force increases with the number of teeth that are present and the association between maximum bite force and the amount of occlusal contacts is more relevant in the posterior region and, as a consequence, the loss of molars, for instance, would result in a reduction of bite force 7 .There are studies that have found statistically significant differences between force measurements and the different types of occlusion, measured directly -using a force transducer -, with the smallest force having been found in individuals with malocclusion 7,8 .Studies conducted with prognathous patients before and after orthognathic surgery, measuring force in this same way, have shown that the parameters of bite force improve after surgery, although none reached the values of individuals with normal occlusion [9][10][11][12][13] .…”