Arthroscopic single-bundle ACL reconstruction with modified double-layer bone-patellar tendon-bone allograft.
OBJECTIVE
The objective of present study was to introduce a modified double-layer bone-patellar tendon-bone (BPTB) allograft for arthroscopic single-bundle ACL reconstruction and investigate the clinical outcomes.


METHODS
From 2007 to 2009, a total of 136 patients underwent arthroscopic single-bundle ACL reconstructions with BPTB allograft. Of which, 66 patients were with double-layer BPTB allograft (Group 1), and 70 patients were with conventional BPTB allograft (Group 2). Clinical outcomes including Lachman and pivot-shift tests, KT-1000 arthrometer measurements, and Lysholm and Tegner activity scores were compared between the two groups at a 2-year minimum follow-up.


RESULTS
Forty-six patients in each group were at a two-year minimum follow-up. The mean side-to-side difference on the KT-1000 arthrometer was 1.2 ± 1.2 mm for group 1 and 2.1 ± 1.9 mm for group 2, with significant difference between the two groups (p = 0.017). The knee function was significantly better for group 1 than for group 2, because the mean Lysholm score was 94.2 ± 4.8 points versus 86.6 ± 7.1 points (p = 0.000), and the median Tegner score was 8 (range 5-10) points versus 6 (range 4-10) points (p = 0.001).


CONCLUSIONS
On the basis of the KT-1000 arthrometer evaluation and clinical measures, single-bundle ACL reconstruction with double-layer BPTB allograft achieves significantly lesser anterior laxity and better knee function than a single-layer allograft reconstruction.


METHODS
Therapeutic, retrospective comparative study, Level III.
Department of Orthopaedic Surgery, Shijiazhuang No. 1 Hospital, Shijiazhuang, 050011, Hebei, China.
Hui Jun
HJ
Kang
Yan Ling
YL
Su
Hui Jian
HJ
Cao
Fei
F
Wang
Da Hai
DH
Yu
Zhi Min
ZM
Zheng
Ying Ze
YZ
Zhang
D000293:Adolescent; D000328:Adult; D064591:Allografts; D016118:Anterior Cruciate Ligament / Q000601:surgery; D000070598:Anterior Cruciate Ligament Injuries; D059549:Anterior Cruciate Ligament Reconstruction / Q000379:methods*; D001182:Arthroscopy; D050376:Bone-Patellar Tendon-Bone Grafting / Q000379:methods*; D064594:Bone-Patellar Tendon-Bone Grafts; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000517:prevention & control; D008297:Male; D012189:Retrospective Studies; D055815:Young Adult