This study was designed to determine whether eye-dominance affects head posture (rotation) and in turn, whether head posture is associated with mandibular frenum midline deviation, in both TMJ and control subjects. Eye dominance was determined using three tests:Porta, Hole, Point tests. Natural head posture was evaluated using the Arthrodial protractor. Mandibular frenum deviation was recorded as left, right or no deviation. Fifty female subjects were included in the study, 25 TMJ patients attending the Gelb Craniomandibular Pain Center and 25 non-TMJ control subjects. The findings indicate that eye dominance and direction of head rotation are strongly associated in both TMJ and control subjects. Further, in TMJ subjects mandibular deviation occurred in greater frequency than in controls and tends to occur in the contra lateral direction of head rotation.
Various designs of acetabular cup are available for cementless fixation in patients undergoing total hip arthroplasty. Conflicting results have been reported in the literature about the middle to long term outcomes with the use of these cups. We present our experience of a design of selftapping threaded acetabular cup with metal baclcing (the ACSYS acetabular cup). This is a study of 41 hips with average follow up of 6.43 years. Functional grading of the hips was very satisfactory and none of the patients needed revision for aseptic loosening. No case of significant cup migration or osteolysis was noted. The paper also reviews the literature.
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