Periacetabular Osteotomy for Developmental Hip Dysplasia with Labral Tears: Is Arthrotomy Or Arthroscopy Required? Songkiat Thanacharoenpanich1, Matthew J
Total Page:16
File Type:pdf, Size:1020Kb
Journal of Hip Preservation Surgery Vol. 5, No. 1, pp. 23–33 doi: 10.1093/jhps/hnx048 Advance Access Publication 11 January 2018 Research article Periacetabular osteotomy for developmental hip dysplasia with labral tears: is arthrotomy or arthroscopy required? Songkiat Thanacharoenpanich1, Matthew J. Boyle2, Robert F. Murphy3, Patricia E. Miller4, Michael B. Millis4, Young-Jo Kim4 and Yi-Meng Yen4* 1Institute of Orthopaedics, Lerdsin General Hospital, Bangkok, Thailand 10500, 2Department of Orthopaedics, Starship Children’s Hospital, Grafton, Auckland 1023, New Zealand, 3Department of Orthopaedics, Medical University of South Carolina, Charleston, SC 29425, USA and 4Department of Orthopaedics, Boston Children’s Hospital, Boston, MA 02115-5724, USA *Correspondence to: Y.-M. Yen. E-mail: [email protected] Submitted 26 April 2017; revised version accepted 19 December 2017 ABSTRACT Patients with developmental dysplasia of the hip (DDH) who undergo periacetabular osteotomy (PAO) often have labral tears. The objective of this retrospective study was to compare PAO alone with PAO combined with arthrotomy or arthroscopy in DDH patients who had a full-thickness labral tear on magnetic resonance imaging. In total, 47 hips in the PAO group (PAO) were compared with 60 hips in the PAO with concomitant arthrotomy or arthroscopy (PAO-A) with respect to Hip Disability and Osteoarthritis Outcome Score (HOOS), modified Harris Hip Score (mHHS), Visual Analog Scale (VAS), clinical and radiographic outcomes at a median of 29 months. Reoperation rate and complications were compared between two groups of treatment. The PAO group was younger than the PAO-A group (25.2 6 9.7 versus 31.3 6 8.3). The PAO group was more likely to have worse dysplasia: lateral center edge angle (7.669.63 versus 10.866.85) and anterior center edge angle (4612.92 versus 10.869.92). The PAO group had a higher preoperative mHHS (65.2 6 15.3 versus 57.8 6 14.8) and HOOS (66.3 6 17.5 versus 55.8 6 20.1). There were no significant differences in final func- tional outcome scores across treatment groups: mHHS (PAO; 86.8 6 12.4 versus PAO-A, 83.3 6 17.2), HOOS (86.5 6 13.3 versus 82.5 6 16.8) and VAS (2.5 6 2.8 versus 2.5 6 3.1). There was no difference in reoperation rate between two groups (6.4% versus 11.6%, P 0.51). The overall complication rate was lower in the PAO ¼ group (26% versus 68%), but major complications were comparable. On the basis of our data, we were not able to conclusively demonstrate a clear benefit for the routine treatment of all labral tears; however, arthrotomy or arthroscopy may play a role in some conditions. BACKGROUND articular cartilage damage. The Bernese periacetabular Developmental dysplasia of the hip (DDH) is one of the osteotomy (PAO) is an effective surgical treatment for more common causes of hip osteoarthritis in young adults. symptomatic DDH that reorients the dysplastic acetabu- The bony acetabulum in patients with DDH is abnormally lum resulting in improved hip stability, femoral head cover- shallow, often resulting in labral hypertrophy and forcing age and joint biomechanics [6–9]. Satisfactory outcomes the acetabular labrum to play a larger role in weightbearing have been reported following PAO, with a hip preservation and joint stability, which may eventually lead to tensile rate of 76% at 9 years postoperatively [10] and 60% at labral failure [1–5]. The weightbearing area of acetabular 20 years postoperatively [11]. cartilage is correspondingly reduced resulting in increased Labral pathology is common in patients with DDH, with cartilage contact forces which can lead to progressive labral tears reported in 60–100% of patients undergoing VC The Author(s) 2018. Published by Oxford University Press. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by- nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact [email protected] 23 Downloaded from https://academic.oup.com/jhps/article-abstract/5/1/23/4799057 by guest on 14 July 2018 24 S. Thanacharoenpanich et al. PAO [1, 5]. Labral tears contribute to mechanical symp- pathology (PAO), and Group 2 (60 hips): patients toms and the generation of hip pain in affected patients. who underwent PAO with concomitant arthrotomy or Although PAO has become the mainstay of surgical treat- arthroscopy for evaluation and treatment of intra-articular ment of symptomatic DDH, the ideal management of asso- pathology (PAO-A). In the PAO-A group, 43 hips under- ciated labral tears is less clear. A PAO biomechanically went PAO with arthrotomy whereas 17 hips underwent offloads the damaged labrum, potentially rendering labral PAO with arthroscopy. The two groups were compared pathology obsolete; many studies have reported satisfac- preoperatively and at final follow-up with respect to tory outcomes after isolated PAO despite the high rates of clinical assessment, radiographic analysis and functional labral pathology in this population [11, 12]. Alternatively, scores [Harris Hip Score (HHS), Hip Disability and PAO may be combined with hip arthrotomy or arthro- Osteoarthritis Outcome Score (HOOS) subscales and scopy to directly assess and treat labral pathology [5, 9, 10, Western Ontario and McMaster Universities Osteoarthritis 13–15]; however, the indications and necessity of these Index (WOMAC)]. Patients were followed for a mean of additional procedures are unclear. Two reports on arthro- 28.11 6 14.3 months following PAO. scopic treatment of labral pathology after PAO showed Indications for PAO included a minimum of 3 months modest clinical improvement after arthroscopic surgery of hip and/or groin pain aggravated by activity, despite [16, 17], suggesting that it may be beneficial to treat labral non-operative management, with radiographic evidence of pathology at the time of PAO. Patients that underwent a acetabular dysplasia based on a lateral center-edge angle concomitant arthroscopy for labral pathology at the time (LCEA) <20 on an anteroposterior pelvic plain radio- of the PAO had slightly greater improvements in short- graph and/or an anterior center-edge angle (ACEA) <20 term clinical outcomes compared with the PAO alone on a false profile view. Indications for combined PAO and group in a recent study [14]. hip arthroscopy included the prior in addition to a painful, There is currently a paucity of information available mechanical sensation reported by the patient with hip comparing PAO alone to treatment of labral pathology and motion and activity. Indications for combined PAO and PAO in patients with symptomatic DDH and labral tears. hip arthrotomy included the prior in addition to <10 of The purpose of this study was to compare the clinical, hip internal rotation with the hip in 90 of flexion intra- radiographic and functional outcomes after PAO with operatively after repositioning of the acetabular fragment. those after PAO combined with hip arthroscopy or arthrot- omy in patients with DDH and full-thickness labral tears Surgical technique on preoperative magnetic resonance imaging (MRI) The surgeries were performed by three surgeons; Surgeon arthrogram. We hypothesized that PAO combined with A performed PAO in addition to hip arthroscopy or hip arthroscopy or arthotomy would demonstrate superior arthrotomy when indicated, Surgeon B performed PAO in outcomes compared with PAO alone. addition to hip arthrotomy when indicated, and Surgeon C performed hip arthroscopy only. Hip arthroscopy was per- MATERIALS AND METHODS formed immediately prior to PAO in selected patients using a two-portal technique and a supine traction table as Patient selection previously described [18]. Central and peripheral compart- This study is a retrospective review of prospectively col- ments were treated, including labral repair with suture lected study data. Following institutional review board anchors, labral debridement and/or osteochondroplasty of approval, a series of 429 patients with DDH who underwent the femoral head neck junction, followed by capsular clo- PAO at our institution during April 2009–December 2014 sure with absorbable suture. PAO was performed according were identified. Study inclusion criteria consisted of skele- to a previously described technique [19, 20] through an tally mature DDH patients with a full thickness labral tear anterior modified Smith Petersen approach. When an on preoperative MR arthogram (defined as contrast com- arthrotomy was indicated, the direct and reflected heads of pletely traversing the labrum on at least one image) with a rectus femoris were detached and an anterior arthrotomy minimum of 1 year of follow-up after surgery. Exclusion cri- was performed. The joint was visually inspected, and the teria included any syndromic form of hip dysplasia and central compartment was treated with labral repair using those who had incomplete data. After exclusions, a total of sutures or suture anchors or labral debridement. An osteo- 107 hips in 82 patients were enrolled into the final cohort. chondroplasty of the femoral head neck junction was per- Included patients were allocated into two groups; formed to regain internal rotation, followed by capsular Group 1 (47 hips): patients who underwent PAO alone closure with absorbable suture and rectus femoris tendon without joint inspection and without addressing labral repair with non-absorbable suture. Downloaded from https://academic.oup.com/jhps/article-abstract/5/1/23/4799057 by guest on 14 July 2018 PAO for DDH with labral tears 25 Postoperatively, all patients were instructed to use when data deviated from normality. These characteristics crutches with partial weight bearing for the first 6–8 weeks were compared across treatment groups using chi-squared after surgery until radiographic healing was confirmed. tests for categorical and binary variables and Student’s t-test Physical therapy was recommended after the 6- or 8-week or the Mann–Whitney U-test for continuous variables.