TY - JOUR
T1 - Mobility of the mandible following advancement and maxillomandibular or rigid internal fixation
T2 - An experimental investigation in Macaca mulatta
AU - Ellis, Edward
N1 - Funding Information:
Assistant Professor, Oral and Maxillofacial Surgery. Research Investigator, Center for Human Growth and Development; and Co-Director, Dentofacial Program, The University of Michigan, Ann Arbor, Michigan. Supported by NIH-NIDR Grant DE06874, a grant from the University of Michigan School of Dentistry, and a grant from the Chalmers J. Lyons Academy-James R. Hayward Research Fund. Address correspondence and reprint requests to Dr. Ellis: School of Dentistry, Department of Oral and Maxillofacial Surgery, The University of Michigan, Ann Arbor, MI 48109. 0 1988 American Association of Oral and Maxillofacial Surgeons
PY - 1988/2
Y1 - 1988/2
N2 - This study examined the postsurgical range of mandibular motion following sagittal advancement osteotomy in Macaca mulatta when either maxillomandibular or rigid ossesous fixation were used. Seventeen adult female Macaca mulatta underwent sagittal advancement osteotomy of approximately 4 to 6 mm. Six had 6 weeks of maxillomandibular fixation and eleven had rigid osseous fixation with no maxillomandibular fixation. Mandibular range of motion was measured by the change in the angle of the posterior aspect of the mandibular ramus from a closed-mouth and an open-mouth cephalogram. Parametric tests were used to statistically analyze the results. The results of this investigation showed that the animals who did not undergo maxillomandibular fixation maintained a greater range of motion in the early postsurgical period and obtained preoperative mobility by 12 weeks postsurgery. The animals who underwent six weeks of maxillomandibular fixation showed statistically significant decreases in range of motion when compared to the rigid fixation group at each period of time postsurgery, with significant reductions from preoperative values at 12 weeks postsurgery.
AB - This study examined the postsurgical range of mandibular motion following sagittal advancement osteotomy in Macaca mulatta when either maxillomandibular or rigid ossesous fixation were used. Seventeen adult female Macaca mulatta underwent sagittal advancement osteotomy of approximately 4 to 6 mm. Six had 6 weeks of maxillomandibular fixation and eleven had rigid osseous fixation with no maxillomandibular fixation. Mandibular range of motion was measured by the change in the angle of the posterior aspect of the mandibular ramus from a closed-mouth and an open-mouth cephalogram. Parametric tests were used to statistically analyze the results. The results of this investigation showed that the animals who did not undergo maxillomandibular fixation maintained a greater range of motion in the early postsurgical period and obtained preoperative mobility by 12 weeks postsurgery. The animals who underwent six weeks of maxillomandibular fixation showed statistically significant decreases in range of motion when compared to the rigid fixation group at each period of time postsurgery, with significant reductions from preoperative values at 12 weeks postsurgery.
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U2 - 10.1016/0278-2391(88)90262-5
DO - 10.1016/0278-2391(88)90262-5
M3 - Article
C2 - 3422279
AN - SCOPUS:0023853941
SN - 0278-2391
VL - 46
SP - 118
EP - 123
JO - Journal of Oral and Maxillofacial Surgery
JF - Journal of Oral and Maxillofacial Surgery
IS - 2
ER -