Cone-beam computed tomography evaluation of periodontal and bone support loss in extraction cases.

Background: The aim of this study was to evaluate, in particular, whether bone resorption occurred at the extraction sites of a group of patients under orthodontic treatment, and, in general, whether extraction treatment predisposes patients to a greater degree of root resorption.

Methods: The study group comprised 12 class II division 1 malocclusion patients who underwent orthodontic treatment and extraction, and the control group comprised 10 class II division 1 patients who underwent orthodontic treatment without extraction. In both groups, treatments were carried out by the same operator using the same techniques.

An investigation into explosive force variation using occlusal bites.

Objective: To analyse the relationship between occlusion, posture and athletic performance in 15 professional basketball players. MATERIALS AND METHOD; The athletes were divided into two groups; the 8 subjects in the test group were fitted with retainers and the 7 subjects in the other group were used as control. All of the athletes underwent electromyographic and kinaesiographic examination with Transcutaneous Electrical Nerve Stimulation (TENS) before and after muscular relaxation to identify the myocentric position and to permit individualisation of the retainers.