Читать книгу Temporomandibular Disorders - Robin J. M. Gray - Страница 50

The undifferentiated germinative mesenchyme cell layer persists in the mandibular condyle throughout life. This is one of the primary growth centres of the jaw in adolescence. There are three presentations of condylar hyperplasia. The first is when, during the pubertal growth spurt, one growth centre is more active than the other, and this results in a facial and occlusal irregularity where the asymmetry is vertical; the second is towards the end of puberty when one growth centre ‘switches off’ when the other does not. The clinical presentation of this is a combined vertical and horizontal facial asymmetry. The third is when the growth centre on one side becomes active, but the other side is inactive; this produces a horizontal discrepancy and facial asymmetry.