Original article
Clinical Outcomes After Isolated Arthroscopic Single-Bundle Posterior Cruciate Ligament Reconstruction

https://doi.org/10.1016/j.arthro.2005.05.023Get rights and content

Purpose: The purpose of this study was to evaluate the clinical outcomes after arthroscopic single-bundle posterior cruciate ligament (PCL) reconstruction in patients with isolated grade III PCL injuries. Type of Study: Retrospective review. Methods: Twenty-one patients who underwent an isolated arthroscopic single-bundle PCL reconstruction for the treatment of a grade III PCL injury between 1989 and 1998 were included in the study. There were 15 male and 6 female patients with an average age of 38 years (range, 20 to 62 years). The length of follow-up was 5.9 years (range, 2.6 to 11 years), and the average time from injury to surgery was 4.5 years (median, 1.3 years; range, 2 weeks to 25 years). All patients completed a subjective evaluation and 14 patients returned for a physical examination and radiographs. One patient underwent an acute reconstruction (<3 weeks), 4 had a subacute (<3 months), and 16 underwent a chronic (>3 months) reconstruction. The anterolateral bundle of the PCL was reconstructed using an Achilles tendon allograft passed through femoral and tibial bone tunnels. Results: The overall average Activities of Daily Living Scale (ADLS), Sports Activities Scale (SAS), and SF-36 scores were 79.3, 71.6, and 98 points, respectively. There was a significant difference identified when the ADLS (91.3 v 75.6) and the SAS (90.4 v 65.8) scores of the subacute/acute group were compared with those of the chronic reconstruction group. Using the International Knee Documentation Committee (IKDC) subjective assessment, 57% of the patients had normal/near normal knee function, and 62% had a normal/near normal activity level. The average extension and flexion losses were 1° and 5°, respectively. Instrumented laxity examination revealed that 62% had less than a 3-mm and 31% had a 3- to 5-mm side-to-side difference in corrected posterior displacement. Radiographs at follow-up showed that 75% had normal/near normal findings according to IKDC guidelines. Conclusions: The clinical outcomes after arthroscopic single-bundle PCL reconstruction in this study produced a satisfactory return of function and improvement in symptoms. All patients in this study had improved laxity of at least 1 grade. When compared with chronic reconstructions, acute reconstructions had statistically significant better ADLS and SAS scores. Level of Evidence: IV, case series.

Section snippets

Methods

Twenty-five patients underwent isolated arthroscopic single-bundle PCL reconstruction for the treatment of a grade III PCL injury between 1989 and 1998 at our institution. All patients selected for surgery were felt to represent isolated PCL injuries. A grade III PCL was defined according to the International Knee Documentation Committee (IKDC) score of greater than 10 mm of posterior tibial translation compared with the contralateral knee at 90° of flexion, which corresponds clinically to the

IKDC Subjective Assessment

The IKDC subjective evaluation was based on patient-reported self-assessments of their knee function and activity level (Table 1). In terms of knee function, 57% of patients stated that they were normal or nearly normal, whereas 43% were abnormal or severely abnormal. In terms of activity level, 62% of patients described a normal or nearly normal level of activity and 38% who reported abnormal or severely abnormal activity level.

In the acute/subacute group, all patients reported normal or

Discussion

The management of PCL injuries remains a challenging clinical problem. Numerous studies have described the anatomy and the biomechanical properties of the PCL.39, 40, 41, 42 Studies have also provided a scientific rationale for PCL reconstruction (single- v double-bundle), graft selection, tunnel placement, and fixation.43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61 However, no single PCL reconstruction technique has emerged as the one that is consistently accepted

Conclusions

The clinical outcomes after arthroscopic single-bundle PCL reconstruction produced a satisfactory return of function and improvement in symptoms. All patients had improved laxity of at least 1 grade. Based on our data, acute/subacute reconstructions had statistically significant better subjective outcomes than did chronic reconstructions. Other differences may exist, but our sample size was not sufficient to detect them.

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