A prospective randomized study of ACL-reconstructions using bone-patellar tendon-bone grafts fixed with bioabsorbable or metal interference screws
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Jon Olav Drogset • Lene Granrud Straume • Ingrid Bjّrkmo • Gunnar Myhr
- چاپ و سال / کشور: 2011
Description
Introduction Bioabsorbable screws are, at the expense of metal screws, increasingly used as fixation device in ACLreconstructions. The possible advantages with bioabsorbable screws are better postoperative MRI evaluations and easier revision surgery. Purpose The aim of this study was to compare the clinical outcome after ACL-reconstructions with BPTB-grafts fixed with metal interference screws or bioabsorbable screws 7 years postoperatively. The resorption of the bioabsorbable screws was also analyzed. Methods Between 2000 and 2001, 41 patients with ACL deficient knees were randomized for the use of BPTB-graft fixed with either metal interference screws or bioabsorbable poly-L-lactic acid screws. This is a 7-year follow-up with clinical examinations of both groups and, MRI of the patients with bioabsorbable screws. Results The clinical and functional results were satisfactory in both groups. There were no significant differences between the groups in any parameter measured, except for better Pivot shift results in the bioscrew group (P = 0.04). The MRI evaluation showed degradation of the bioscrews. A residual screw tract which appeared threaded was seen in the tibia in 11 of the 16 patients. There was no sign of bony ingrowth in the previous screw site in the tibia in any of the patients. Conclusion The potential advantages of using PLLAscrews compared to metal screws are not sufficient to warrant the routine use of PLLA-screws in ACLreconstructions. Level of evidence I.
Knee Surg Sports Traumatol Arthrosc (2011) 19:753–759 DOI 10.1007/s00167-010-1353-4 Received: 18 April 2009 / Accepted: 30 November 2010 / Published online: 14 January 2011
