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An Experimental Study

Peter D. Costantino, MD; George Shybut, MD; Craig D. Friedman, MD; Harold J. Pelzer, DDS, MD; Michael Masini, MD; Maise L. Shindo, MD; George A. Sisson, Sr, MD

Arch Otolaryngol Head Neck Surg. 1990;116(5):535-545.

Abstract
• We report the use of distraction osteogenesis for segmental mandibular regeneration. This technique has been used in thousands of patients in the Soviet Union to regenerate as much as 30 cm of tubular bone in the extremities. However, we are unaware of previous experimental or clinical reports of segmental mandibular regeneration by distraction osteogenesis. In a canine model, 2.5-cm segmental mandibular defects were filled with regenerate bone in 25 days at a rate of 1.0 mm/d using bifocal distraction osteogenesis. The diameters of the regenerate segments were comparable with preexisting mandi

ble, and all animals resumed normal oromandibular function following regeneration. The regenerate bone was evaluated radiographically, angiographically, and histologically. In the control group without distraction osteogenesis, the segmental defects failed to fill with regenerate bone. The theoretical basis for distraction osteogenesis, a detailed description of the technique, and a review of previous studies on experimental mandibular lengthening are presented.

(Arch Otolaryngol Head Neck Surg. 1990;116:535-545)

Author Affiliations
From the Departments of Otolaryngology—Head and Neck Surgery (Drs Costantino, Pelzer, Shindo, and Sisson) and Orthopedic Surgery (Drs Shybut and Masini), Northwestern University Medical School and Northwestern Memorial Hospital, Chicago, Ill, and the Section of Otolaryngology, Yale University School of Medicine, New Haven, Conn (Dr Friedman).

Footnotes
Accepted for publication January 15, 1990.

Presented at the Society of Air Force Clinical Surgeons 38th Annual Symposium, Bethesda, Md, April 3, 1989.

Reprint requests to the Department of Otolaryngology—Head and Neck Surgery, Northwestern University Medical School, 707 N Fairbanks, Suite 922, Chicago, IL 60611 (Dr Costantino).

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