林瑞新(Lin Ruixin，Dept Orthop，3rd Affil Hosp Wenzhou Med Col，Rui’an 325200)…∥Chin J Orthop.－2010，30(12).－1187～1191

The pair ringer technology for bony avulsion of the posterior cruciate ligament under arthroscopy

林瑞新(Lin Ruixin，Dept Orthop，3rd Affil Hosp Wenzhou Med Col，Rui’an 325200)…∥Chin J Orthop.－2010，30(12).－1187～1191

ObjectiveTo investigate the feasibility and clinical effects of the pair ringer technology for bony avulsion of the posterior cruciate ligament under arthroscopy.MethodsFrom January 2005 to July 2009，23 patients were treated with the pair ringer technology for bony avulsion of the posterior cruciate ligament by arthroscopy.There were 15 males and 8 females，with an average of 39.3 years(ranging from 28 to 52 years).There were 4 cases of typeⅡ，14 typeⅢ，and 5 typeⅣ according to Meyer-Mckeever classification.The outcome measures were X-ray and MRI testing，Lysholm and Tegner knee function score.ResultsAll the operations were finished in an hour.There were no complications as nerve injury or infection occurred in the study.The patients were followed-up for an average of 16.5 months(12 － 23 months).The Lysholm score rose from 50.3 ± 6.1 preoperatively to 89.7 ±8.3 at the six months postoperatively(t=18.34，P=0.0007).The Tegner score rose from 1.7 ±0.5 preoperatively to 5.7 ±1.3 at the six months postoperatively(t=13.77，P=0.0008).All of the patients recover a functionally stable knee and have considerably improved knee function compared with their preoperative status.ConclusionThe pair ringer technology under arthroscopy is a reliable method for bony avulsion of the posterior cruciate ligament.This minimally invasive technology leads to firm fixation，early rehabilitation.9 refs，3 figs.

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