Introduction: In the present study, the stability and biocompatibility of a 30% polymethylmethacrylate (PMMA) filling material implanted in the masseter muscle of rats were investigated according to the cytologic characteristics presented in the graft versus host reaction. Methods: The study included 20 rats, which were divided into 4 groups: groups I, II, III, and IV corresponded to animals ev...

The study of the craniomandibular biomechanics is related to the system of predominant lever and of the relation between function and mechanically induced deformations. This study has the purpose of evaluating the chewing muscular dynamics in the surface electromyography Seventeen people of both sex, medium aged about 25, were selected, white skin and presenting Class I of Angle without apparen...

BACKGROUND Lower impacted third molar surgical extraction usually causes post-surgical sequelae like pain, trismus and swelling as a result of postoperative inflammatory response. OBJECTIVE The aim of this study was to evaluate and compare the efficacy of single dose 40-mg (1 cc) of methylprednisolone acetate, injected into the masseter muscle, preoperatively one hour before the surgery or po...

PURPOSE The objective of the following study is to observe the behavior of the six layers of the masseter during an isometric contraction at maximum exertion with the deformation pattern analysis method. MATERIALS AND METHODS This study has been conducted by use of an ultrasound machine (MicrUs ext-1H Telemed Medical Systems Milano) and a linear probe (L12-5l40S-3 5-12 MHz 40 mm) which allowe...

BACKGROUND When breastfeeding is difficult or impossible during the neonatal period, an analysis of muscle activity can help determine the best method for substituting it to promote the child's development. The aim of this study was to analyze the electrical activity of the masseter muscle using surface electromyography during suction in term newborns by comparing breastfeeding, bottle and cup ...