• Department of Orthopaedics,Changzheng Hospital, Second Military Medical University， Shanghai，200003, P. R. China;
Tibial lengthening; Callus diameter ratios; New bone fracture; Angular deformity; Alarming index.
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Objective To investigate the relationship between the tibia callus diameter ratio(CDR) and prognosis during tibial distraction and the occurrenceof late deformity or fracture. Methods We measured tibiallengthening callus diameter and added up the cases of angular deformity and fracture in 68 casesfrom January 1996 to December 2001, to calculated callus diameter ratios and compare the relationship between the tibia callus diameter during tibial distraction and the occurrence of late callus angular deformity or fracture. Results In 23 cases of CDR lt;80%, 13 cases had new bone fracture, 21 cases had angular deformity  gt;5 degree. In 6 cases of 81% lt;CDR lt;85%, there were 4 cases of angular deformity  gt;5 degree. In the other 39 cases of CDR gt;85%, there were no fracture and angular deformity. Conclusion When the CDR was  gt;85%, there wereno angular deformity and fracture, but when the CDR was  lt;80%, the complications of fracture and angular deformity occur. CDR is a better alarming index for preventing the complications occurring in tibial lengthening.

Citation： WU Ye,ZHANG Zhigang,LIN Yanjun,et al.. RELATIONSHIP BETWEEN TIBIA CALLUS DIAMETER RATIO AND PROGNOSIS DURING TIBIA LENGTHENING. Chinese Journal of Reparative and Reconstructive Surgery, 2004, 18(3): 174-176. doi: Copy