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Table 2 Clinical results

From: Anatomic single-bundle anterior cruciate ligament reconstruction using a calcium phosphate-hybridized tendon graft: a randomized controlled trial with 2 years of follow-up

  CaP group Conventional group P value
Re-ruptured cases (n (%))
 1 year postoperatively 1 (2.2%) 4 (8.9%) 0.167
 2 years postoperatively 1 (2.2%) 2 (4.4%) 0.557
 Total 2 (4.4%) 6 (13.3%) 0.138
Anterior knee laxity measured by KT-1000 arthrometry (mm)
 Preoperative 9.2 ± 3.2 (n = 45) 10.1 ± 2.5 (n = 45) 0.139
 1 year postoperatively 0.7 ± 1.1 (n = 38) † 0.4 ± 1.0 (n = 36) † 0.323
 2 years postoperatively 0.9 ± 1.5 (n = 19) † 0.1 ± 0.8 (n = 16) † 0.094
Pivot-shift test: 0, 1+, 2+, 3+ (n)
 Preoperative 0, 8, 37, 0 (n = 45) 0, 6, 39, 0 (n = 45) 0.561
 1 year postoperatively 36, 1, 1, 0 (n = 38) † 35, 2, 0, 0 (n = 37) † 0.513
 2 years postoperatively 22, 2, 0, 0 (n = 24) † 19, 0, 0, 0 (n = 19) † 0.198
IKDC grade: A, B, C, D (n)
 Preoperative 0, 2, 27, 16 (n = 45) 0, 0, 28, 17 (n = 45) 0.359
 1 year postoperatively 35, 2, 1, 0 (n = 38) † 34, 3, 0, 0 (n = 37) † 0.548
 2 years postoperatively 20, 4, 0, 0 (n = 24) † 19, 0, 0, 0 (n = 19) † 0.062
Lysholm scale (points)
 Preoperative 54.6 ± 9.6 (n = 45) 51.7 ± 7.4 (n = 45) 0.117
 1 year postoperatively 98.2 ± 2.9 (n = 38) † 98.6 ± 2.2 (n = 37) † 0.464
 2 years postoperatively 98.2 ± 4.5 (n = 43) † 99.5 ± 1.8 (n = 39) † 0.110
Tegner scale: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 (n)
 Preoperative (preinjury) 0, 0, 0, 2, 3, 3, 18, 10, 1, 8, 0 (n = 45) 0, 0, 0, 0, 2, 0, 14, 12, 1, 16, 0 (n = 45) 0.201
 1 year postoperatively 0, 0, 0, 3, 7, 9, 10, 6, 0, 3, 0 (n = 38) † 0, 0, 0, 0, 4, 9, 14, 4, 0, 6, 0 (n = 37) † 0.319
 2 years postoperatively 0, 0, 0, 3, 2, 6, 14, 10, 1, 7, 0 (n = 43) 0, 0, 0, 0, 2, 2, 13, 9, 0, 13, 0 (n = 39) 0.260
  1. Results are given as the mean ± SD
  2. Significant difference between the two groups (P < 0.05); † significant difference compared with preoperative value (P < 0.05)
  3. IKDC International Knee Documentation Committee
  4. The CaP group underwent single-bundle anterior cruciate ligament reconstruction with a calcium phosphate-hybridized graft, while the conventional group underwent reconstruction with a conventional tendon graft