Clinical investigation and details of four cases of skeletal class I patients who received simultaneous repositioning of the maxilla and mandible are reported in this paper.
Indications for simultaneous two-jaw surgery for select class III dentofacial deformities are also discussed.
The restoration of normal jaw function, optimal facial esthetics and long term stability is the sine qua non of successful corrective surgery to class I dentofacial deformities.
The keys to this are accurate three dimensional analysis, planning and surgery based on foundations of clinical, biological and biomechanical examination. The following four groups of select class I dentofarial deformities qualify for simultaneous two-jaw surgery: (1) severe class I dentofacial deformities without vertical and transverse deformities, (2) class jil dentofacial deformities with vertical maxillary excess, (3) class III dentofacial deformities with vertical maxillary deficiency and (4) class I dentofacial deformities with maxillary asymmetry.
However, group (1) was small. The majority of class III dentofacial deformities requiring simultaneous two-jaw surgery were types (2), (3) and (4).