Dataset Information

Screw Fixation of Os Acetabuli: An Arthroscopic Technique.

ABSTRACT: An os acetabuli (OA) increases the contact area and surface area of the acetabulum and is important to maintain congruity of the hip joint. Thus preservation of this ossicle is important to prevent loss of contact area and ensure containment of the femoral head. We describe an all-arthroscopic approach to the fixation of OA with a compression screw. Initially, the fibrous tissue is debrided between the acetabular rim and the OA, a guidewire is placed through the OA up to the acetabular rim, and a screw is inserted over the wire. Compression of the OA is achieved with bone-to-bone contact. This technique prevents loss of femoral head coverage, reducing the risk of subluxation and subsequent osteoarthritis.

SUBMITTER: Cuellar A

PROVIDER: S-EPMC5495954 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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Screw Fixation of Os Acetabuli: An Arthroscopic Technique.

Cuéllar Adrián A Albillos Xabier X Cuéllar Asier A Cuéllar Ricardo R

Arthroscopy techniques 20170619 3

An os acetabuli (OA) increases the contact area and surface area of the acetabulum and is important to maintain congruity of the hip joint. Thus preservation of this ossicle is important to prevent loss of contact area and ensure containment of the femoral head. We describe an all-arthroscopic approach to the fixation of OA with a compression screw. Initially, the fibrous tissue is debrided between the acetabular rim and the OA, a guidewire is placed through the OA up to the acetabular rim, and ...[more]

PMID: 28706834

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Project description:PurposeTo investigate whether os acetabuli identified preoperatively influence functional outcomes 2 years after an arthroscopic acetabular labral reconstruction.MethodsRetrospective study with prospectively collected data of patients undergoing primary hip arthroscopy by a single, fellowship-trained surgeon at a single institution were retrospectively reviewed. Inclusion criteria included age ≥18 years and completion of patient-reported outcome measures (PROMs) preoperatively and at 3-month, 6-month, 12-month, and last follow-up timepoints. Exclusion criteria included labral debridement, hip dysplasia, advanced hip osteoarthritis (Tonnis >1), or previous surgery on the ipsilateral hip. Patients were divided into two cohorts based on the presence of os acetabuli (OA) or the absence of os acetabuli (NOA). Primary outcomes collected included the International Hip Outcome Tool (iHOT-33) and modified Harris Hip Score (mHHS). Secondary outcomes were the Hip Outcome Score-Activities of Daily Living, Hip Outcome Score-Sports Subscale, Non-Arthritic Hip Score, and visual analog pain scale. Inter-cohort outcomes were compared using linear mixed-effects and Fisher's exact tests. Nonlinear improvement trajectories were accounted for by sensitivity analyses.Results193 hips (49.2% female; mean ± SD age: 35.9 ± 11.0) were included in the final analyses. Of these, 25 (13.0%) had an os acetabulum. No significant differences between patients with and without os acetabuli were found throughout the minimum 2-year follow-up period in terms of iHOT-33 scores (weighted difference: 0.09; 95% CI: -6.81, 6.98; P = .98), mHHS (weighted difference: 2.93; 95% CI: -2.13, 7.98; P = .26), or any secondary outcomes. Additionally, there were no significant differences in any queried clinically meaningful outcomes (P > .05 for all), revision arthroscopy (P =.342), rates of formation of heterotopic ossification (p > .999), or conversion to total hip arthroplasty (P > .999). These results were upheld across sensitivity analyses.ConclusionsPatients with os acetabuli undergoing arthroscopic labral reconstruction had similar 2-year functional outcomes compared to those without os acetabuli.Level of evidenceLevel III, Retrospective cohort study.

Dataset Information

Screw Fixation of Os Acetabuli: An Arthroscopic Technique.

Publications

Screw Fixation of Os Acetabuli: An Arthroscopic Technique.

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