Longitudinal Study of Function and Dysfunction in the Stomatognathic System after Maxillary Osteotomy with Anterior-Inferior Repositioning of the Maxilla

Abstract

The frequency and distribution of dysfunction in the stomatognathic system after maxillary osteotomy with anterior-inferior repositioning of the maxilla was studied five to 15 years after the operation. Fourteen patients had unilateral or bilateral lip and cleft palate defects. Examination of the masticatory system included measurements of the range of movement of the mandible, TMJ sounds, luxation and locking, deviation on opening, pain on movement, and palpation of the TMJs and masticatory muscles. A clinical dysfunction index D_i according to Helkimo¹⁸ was determined, based on the recordings. The dysfunction index showed that 18 patients were listed between I-II (90%); of these, 12 were classified as I and six as II (30%). No one was classified as III. Retruded contact position-interferences were found in seven individuals and nonworking side interferences in six. All were pleased with the outcome of maxillary surgery. Surgical corrections of dentofacial deformities should be used as soon as the limits for orthodontic treatment are passed.

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Notes on contributors

I. Egermark-Eriksson

Inger Egermark-Eriksson, L.D.S., Odont. Dr.

Dr. Egermark-Eriksson received her L.D.S. degree from the Dental School in Malmö, University of Lund, Sweden, in 1961, and her Doctor of Odontology (Ph.D.) at the University of Göteborg in 1982. She has been a certified specialist in orthodontics since 1973. Dr. Egermark-Eriksson lectures in Scandinavian countries and has published several articles in professional journals, especially on mandibular dysfunction in children and adolescents.

K-E. Kahnberg

Karl-Erik Kahnberg, Ph.D., D.D.S.

Dr. Kahnberg received his L.D.S. degree from the University of Lund, Malmö, Sweden in 1966 and his Odont. Dr. at the Faculty of Odontology, University of Göteborg, Sweden in 1976. He is currently professor and chairman, Department of Oral Surgery at the University of Göteborg and also member of the Swedish Board of Oral Surgeons. Dr. Kahnberg has written many articles in the field of orthognathic surgery, traumatology, and implantology and has also given numerous postgraduate courses in those fields.