ArticleInternational orthopaedics2023
Periacetabular osteotomy for Tönnis grade 2 osteoarthritis secondary to hip dysplasia.
Article in International orthopaedics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed, 5 citations in OpenAlex.
- Complications, Conversion, and Secondary Procedures Following Minimally Invasive Periacetabular Osteotomy: A Single-Surgeon Case Series.Arthroplasty today · 2025Article
- Bernese periacetabular osteotomy (PAO): from its local inception to its worldwide adoption.Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology · 2023Review
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6 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
purposeTo investigate the clinical outcomes of periacetabular osteotomy (PAO) for Tönnis grade 2 osteoarthritis secondary to hip dysplasia.
methodsForty-nine patients (51 hips) with Tönnis grade 2 osteoarthritis secondary to hip dysplasia, followed by a mean of 52.3 months (range: 24.1 to 95.2 months), were reviewed. As a control group, 51 patients (51 hips) with Tönnis grade 1 osteoarthritis were matched for age, surgery date, and follow-up period. All patients were evaluated clinically with the use of modified Harris hip score (mHHS) questionnaire, WOMAC score, and the 12-item International Hip Outcome Tool (iHot-12). Radiographic measurements included the lateral centre-edge angle (LCEA), Tönnis angle, and anterior centre-edge angle (ACEA). Kaplan-Meier survivorship analysis was performed to predict a five year survival rate of no osteoarthritis progression.
resultsAll functional scores and radiographic measurements of the two groups significantly improved at the final follow-up. There were no significant differences between the two groups either in functional scores or radiographic measurements. The five year survival rate of no osteoarthritis progression was 86.2% in Tönnis grade 2 group and 93.1% in Tönnis grade 1 group, respectively. In the Tönnis grade 2 group, the osteoarthritis progressed in six hips. Of which, four hips had an ACEA of < 25°. No osteoarthritis progression was found in hips with an ACEA > 40°.
conclusionsPAO yielded similar results for patients with Tönnis grade 2 and grade 1 osteoarthritis secondary to hip dysplasia. The majority of hips can be preserved without progression of osteoarthritis at five years postoperatively. The slight overcorrection anteriorly may be helpful in preventing osteoarthritis progression.
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