Journal
ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY
Volume 114, Issue 6, Pages 698-703Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.oooo.2012.01.041
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Objectives. The study aimed to evaluate the expression of MMP-1 and TIMP-1 in irradiated mandibles during distraction osteogenesis. Study Design. Rabbits in the experimental group received preoperative radiation of 9 Gy for 5 fractions. After 1 month, all rabbits underwent osteotomy and distraction osteogenesis with 7 days of latency. Three rabbits in the control and experimental groups were killed at days 7, 12, 18, and 25. Specimens were subjected to immunohistochemical examination and real-time polymerase chain reaction analysis. Results. At day 7, expression of MMP-1 and TIMP-1 was significantly suppressed in the radiotherapy group in contrast to the control group. At day 12, expression of MMP-1 was significantly higher in the control group. At day 18, expression of MMP-1 and TIMP-1 was significantly higher in the control than in the radiotherapy group. Conclusions. Radiotherapy changes the expression pattern of MMP-1 and TIMP-1. (Oral Surg Oral Med Oral Pathol Oral Radiol 2012;114:698-703)
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