Functional state, bite force and postural muscle activity in patients with osseointegrated oral implant bridges

Abstract

The function of the masticatory system of 13 women, aged 42-59 years, with osseointegrated oral implant bridges (OIB) made within the last seven years was compared with that of 10 matched dentate controls by means of a questionnaire, clinical examination, bite force measurements and electromyographic recordings of biting and of postural muscle activity. Both groups were satisfied with their masticatory capacity according to the questionnaire. The clinically determined state of the masticatory system, as judged from the clinical dysfunction index, was normal in both groups. Three levels of bite force 1) gentle biting, 2) biting as when chewing and 3) maximal biting, were recorded with a bite force apparatus and electromyographically. There was no statistically significant difference between the groups at any level of bite force for any of the methods of registration. Nor was there any difference of the two groups in the activity of the masticatory muscles with the mandible in the postural position. It is concluded that patients with osseointegrated oral implant bridges have a masticatory muscle function equal to or approaching that of patients with natural teeth, or with tooth-supported bridges, with the same number of chewing units as the OIB-patients.

A comparison of masticatory function in patients with or without reconstruction of the mandible

“…The typical Western diet requires less than 40N of biting force, whereas harder-toeat foods, such as nuts and carrots, require an average of 66N. 28,29 The nonreconstructed patients in our study, with an average first molar biting force of 76N, would probably not be limited by their ability to bite forcefully. However, Urken found that the nonreconstructed edentulous patients could generate only 23N of force.…”

An In Vitro Comparison of Fracture Load of Zirconia Custom Abutments with Internal Connection and Different Angulations and Thickness: Part I

“…8 In comparison, the naturally occurring mean incisoocclusal loads in anterior regions amount to 110 N for teeth and 370 N for implants. 9,10 With these data from in vitro studies, zirconia was expected to reduce the risk of fracture; however, the type and architecture of the implant/abutment connection, thickness, and angulations might have a substantial influence on the stability and fixation of brittle ceramic abutments.…”

Análise da resistência à fratura entre pilares retos e angulados do sistema cone Morse

“…Desconsiderando-se características anatômicas e fisiológicas individuais, valores entre 180 N e 850 N de força oclusal máxima são relatados em regiões de primeiro molar, diminuindo para valores entre 95 N e 250 N, na região de incisivos 17,18 .…”