Bite force and oral function in patients with osseointegrated oral implants

Abstract

– The function of the masticatory system was analyzed in 19 patients (13 women and 6 men), aged 39 to 68, randomly selected from a group of 165 patients who had been treated with osseointegrated oral implants within the last 7 years (average 3.5 years). The patients were well satisfied with the functional capacity of their implant reconstructions, especially compared with the poor function before treatment. According to the clinical examination, all but one patient had no or only mild symptoms of dysfunction of the masticatory system. Three bite‐force levels were recorded. The mean value for gentle biting was 15.7 N, for biting as when chewing 50.1 N, and for maximal biting 144.4 N. The patients could thus well discriminate between the different bite‐force levels, and the maximal values are much higher than those in persons with removable dentures.

Biomechanical analysis of alveolar bone stress around implants with different thread designs and pitches in the mandibular molar area

“…Additionally, all materials were assumed to be homogeneous and linearly elastic [25]. The applied vertical and buccal oblique forces had a magnitude of 143 N [26][27][28], with the latter being set at 45°to the long axis of the implant on the central fossa. The lower border of the mandibular bone was constrained in the x, y, and z directions (zero displacement) as the boundary condition.…”

Evaluation of prebent miniplates in fixation of Le Fort I advancement osteotomy with the finite element method

“…Bite forces of 250 N for molars and 125 N for incisors were applied as static vertical forces based on the literature, which indicates masticatory forces ranging from 75 to 300 N (Haraldson and Carlsson, 1977;Haraldson et al, 1985;Falk et al, 1989;Uckan et al, 2009).…”

Appropriate diameter for screws to fix the maxilla following Le Fort I osteotomy: An investigation utilizing finite element analysis

“…In order to simulate masticatory forces, 180 N force was applied vertically to the molar region of each model. Since the masticatory forces reported in the literature ranged from 75 to 300 N (Haraldson and Carlsson, 1977;Haraldson, 1985;Falk et al, 1989;Hanai, 1998), 60% of the maximum value was applied. Under these conditions, (1) the maximum von Mises stress around the screw-bone interface and (2) the maximum deviation of the lower segments were calculated for each model.…”