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KMID : 0922220100100010026
Journal of the Korean Musculoskeletal Transplantation Society
2010 Volume.10 No. 1 p.26 ~ p.32
The Utility of Gerdy¡¯s Tubercle as a Donor Site of Cancellous Bone Graft
Kwon Gi-Doo

Ahn Byung-Moon
Jeong Jae-Heon
Park Chi-Woo
Ha Yong-Chan
Abstract
Purpose: Well-recognized donor sites have included iliac crest, olecranon, greater trochanter of femur, proximal and distal tibia, and calcaneus. Some reports indicate that the proximal tibia is a potential alternative donor site for cancellous bone, associated with clinical postoperative complication rates less than 2%. However, the use of the Gerdy¡¯s tubercle for bone graft harvesting is not widely accepted. The aim of this study was to determine the volume of cancellous bone that can be taken from Gerdy¡¯s tubercle, donor site morbidity, and complications.

Materials and Methods: A retrospective review identified 16 procedures (14 patients) between December of 2005 and September of 2006. Age of the patients at operation ranged from 20 to 73 years (average 43.5 years). The indications for bone grafting included nonunion of finger bones, scaphoid nonunion, enchondroma of finger bone, nonunion of metacarpal bones, nonunion of metatarsal bone, nonunion of toe bone, subtalar arthritis. Mean follow-up period was 13 months (range, 8~17 months) and there were 11 male patients, 3 female patients . The study focused at the volume of bone harvested, pain, ability to walk, the appearance of numbness or paresthesia, the formation of hematoma, and the degree of reaction or visual appearance of scar at the end of the observation period.

Results: The average volume of cancellous bone harvested from the Gerdy¡¯s tubercle was 3.6 ml (range, 1.5~9 ml). Immediate postoperative hematoma formation was reported in 2 cases which was resolved spontaneously. Twelve cases had no pain or very mild pain, three cases had mild pain, and one case had moderate pain. Average pain duration was 20.2 days. At the time of follow-up, all patients had no pain. One case had an area of mild paresthesia but no special treatment was needed. All scars were found to be of good quality by both surgeon and patients.

Conclusion: Gerdy¡¯s tubercle is a reliable and safe site for bone harvest with less morbidity than other sites, and a sufficient quantity and quality of bone can be available. Also there is no need to restrict weight bearing to allow donor site healing.
KEYWORD
Gerdy¡¯s tubercle, Bone Graft, Cancellous
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