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Yuki Kato,Joverienne Chavez,Shin Yamada,Soichi Hattori,Shuzo Takazawa,Hiroshi Ohuchi 대한슬관절학회 2019 대한슬관절학회지 Vol.31 No.2
Purpose: This study aimed to investigate anterior knee symptoms in patients who underwent anterior cruciate ligament (ACL) reconstruction using bonepatellar tendonbone (BPTB) graft followed by implantation of a betatricalcium phosphate (βTCP) block as a bone void filler.Materials and Methods: We retrospectively reviewed 84 cases of synthetic bone grafting using a βTCP block for the patellar bone defect in ACL reconstruction with a BPTB autograft. Computed tomography of the operated knee was performed immediately after the surgery to evaluate whether the grafted βTCP block protruded forward from the anterior surface of the patella. On the basis of the results, the cases were divided into a protrusion group (n=31) and a nonprotrusion group (n=53). Anterior knee symptoms at 12 months postoperatively and absorption of the grafted βTCP block were compared between the two groups.Results: Except for patellofemoral crepitus, there was no significant difference in anterior knee symptoms between the two groups (p>0.05). The incidence of patellofemoral crepitus was significantly lower in the protrusion group than in the nonprotrusion group (p=0.027). The groups showed no significant difference in βTCP absorption.Conclusions: The present study demonstrated that the protrusion of βTCP that was used as a bone void filler had no adverse effects.