Predictability of maxillary surgery: a comparison of internal and external reference marks.

Internal reference lines have traditionally been used to correlate model work with maxillary surgery. An external point of reference has been suggested for more accurate positioning of the maxilla during surgery. This study compared the predictability of two groups of patients undergoing Le Fort I maxillary osteotomies with either internal reference lines or an external reference point. In the group in which an external reference point was employed, the position of the maxillary central incisor was more accurately predicted on both the x and y coordinates (p less than 0.01) than in the group in which internal reference lines were placed.

[1]  D. Poulton,et al.  Increase in mandibular and chin projection with orthognathic surgery. , 1985, American journal of orthodontics.

[2]  B N Epker,et al.  Surgical-orthodontic treatment planning for simultaneous mobilization of the maxilla and mandible in the correction of dentofacial deformities. , 1982, Oral surgery, oral medicine, and oral pathology.

[3]  R. Bays.  Rigid stabilization system for maxillary osteotomies. , 1985, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[4]  D. G. Johnson.  Intraoperative measurement of maxillary repositioning: an ancillary technique. , 1985, Oral surgery, oral medicine, and oral pathology.

[5]  J. V. Van Sickels,et al.  Rigid fixation of maxillary osteotomies: a preliminary report and technique article. , 1985, Oral surgery, oral medicine, and oral pathology.

[6]  B. Epker,et al.  Results following simultaneous mobilization of the maxilla and mandible for the correction of dentofacial deformities: analysis of 100 consecutive patients. , 1982, Oral surgery, oral medicine, and oral pathology.

[7]  R. Kaminishi,et al.  Improved maxillary stability with modified Lefort I technique. , 1983, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[8]  B. Epker,et al.  Total maxillary advancement with and without bone grafting. , 1978, Journal of oral surgery.