Maximal contraction force and endurance of human jaw‐closing muscles in isometric clenching

Abstract

Maximal unilateral bite force and endurance times from maximal bite force to the 75% and 50% levels of maximal values were recorded for 13 men and 15 women with bite openings of 10 and 14 mm. Measurements were made both from right and left molar regions and from the incisal region. Bite force values were significantly higher than previously measured in endurance tests by devices with unilateral housings. Men achieved greater bite force than women in the molar region in every trial. The general assumption that women's muscles are superior to those of men in static endurance when both are working at the same percentage of maximal voluntary contraction was not supported by this work for jaw‐closing muscles. The endurance times to 75% and 50% levels of maximal bite force were shorter than could be expected from previous reports, and endurance times to the 50% level were even shorter than those reported for muscles of limbs.

Pain and instability during biting with mandibular implant‐retained overdentures

“…Perhaps, subjects experience more often pain in the maxilla and their maxillary dentures tilt more frequently during biting on one of the devices, which in turn limits bite force. In subjects with a natural dentition, bite force is limited in the incisal region by pain in the teeth or in supportive structures and in the molar region by lack of muscular strength (Waltimo & Könönen 1993, 1995). However, the above‐mentioned explanations have never been studied systematically in edentulous subjects.…”

Fracture resistance of zirconia and resin nano ceramic implant abutments according to thickness after thermocycling

“…While the greatest bite forces are found in posterior regions especially in the first molar area, one-third or one-fourth of that maximum force is found in the anterior area. Some studies reported that the maximum force levels vary from 216 to 847 N and smaller force levels were reported in anterior area varying from 108 to 299 N. [14][15][16] The zirconia abutments investigated in this study exhibited mean fracture strengths of 631.4 at 0.5 mm wall thickness and 1,518.1 and 2,476.3 at 0.8 mm and 1mm wall thickness respectively which all exceeds above mentioned posterior maximum bite force.…”

“…A large number of researches have been focused on the biting forces during human mastication. [14][15][16] And as well known, maximum bite forces vary according to the region of oral cavity. While the greatest bite forces are found in posterior regions especially in the first molar area, one-third or one-fourth of that maximum force is found in the anterior area.…”

Confocal Examination of Subsurface Cracking in Ceramic Materials

“…Dental restorations are subject to intermittent forces during mastication with maximal occlusal forces that range from 200 to 1000 N 3 . When forces of this magnitude are applied to a small surface area, as during tooth‐material contact, substantial stresses are generated, and each stress is capable of creating a corresponding deformation or strain in the contacting bodies.…”