Acetabular reconstruction by impacted cancellous allografts in cementless total hip arthroplasty revision.

OBJECTIVE: The aim of this study was to evaluate the primary and secondary stability, where 100% or virtually 100% of the uncemented acetabular component contacted with impacted cancellous allografts, focusing especially on the amount of graft used and rim contact. METHODS: Fifteen cases of acetabular reconstruction using impacted cancellous allografts and cementless porous-coated component in which 100% or virtually 100% of the component contacted only with the allograft were reviewed. Mean follow-up was 97.5 (range: 58 to 130) months after revision. The Harris hip score was used to evaluate clinical results. Radiographic evaluations were done using standard anteroposterior views obtained at the final follow-up. RESULTS: Two patients underwent re-revision. The mean Harris hip score of the remaining 13 patients was 88.3±11.9 (range: 68 to 100) at the final follow-up. Early postoperative radiographs showed mean angle of inclination of 45° (range: 30° to 55°). There was a mean migration of 6.2±7.8 (range: 0 to 29) mm and the migration amount did not differ according to rim contact (p=0.054). There was no correlation between migration and amount of graft used (p>0.05). There was a significant correlation between migration and follow-up time (p<0.01). CONCLUSION: Our results imply that 50% host bone contact is not absolutely necessary to form a stable construct while restoring the centre of hip rotation.

Incidence of meniscal and osteochondral lesions in patients undergoing delayed anterior cruciate ligament reconstruction.

OBJECTIVE: Unreconstructed anterior cruciate ligament (ACL) tears cause repeated incidences of giving-way and rotational-translational instability. The aim of this study was to test our hypothesis that delayed surgical treatment of patients with ACL tears, especially those with high Tegner activity levels, results in more severe and complicated meniscal and osteochondral lesions with potential affect on the outcome. METHODS: This study included 385 patients who underwent arthroscopic ACL reconstruction between 2001 and 2009. Patients arthroscopic video records or MRI scans and patient files at the time of surgery were analyzed. We defined severe meniscal and osteochondral lesions which could negatively affect the outcome and labeled them meniscal lesions affecting outcome (MLAO) and osteochondral lesions affecting outcome (OLAO). The relation between MLAO, OLAO, time since injury and Tegner activity levels were statistically analyzed. RESULTS: The incidences of MLAO and OLAO grew statistically higher as time elapsed between the injury and surgery increased (p=0.001, p<0.05; p=0.001, p<0.05). The relation between the Tegner activity score, MLAO and OLAO risk were found to be statistically insignificant (p=0.317, p=0.184, p>0.05). CONCLUSION: Delays in ACL reconstruction surgery result in an increase in the incidence of meniscal and osteochondral lesions which have the potential to negatively affect the surgical outcome.