Prospective two-year subsidence analysis of 100 cemented polished straight stems - a short-term clinical and radiological observation
| Autor: | Karl Stoffel, Martin Clauss, Wolf Siepen, Lukas Zwicky, Thomas Ilchmann |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
RM pressfit
Male medicine.medical_specialty Sports medicine Arthroplasty Replacement Hip medicine.medical_treatment Prosthesis Design Subsidence 03 medical and health sciences 0302 clinical medicine Rheumatology medicine Humans Orthopedics and Sports Medicine Prospective Studies 030212 general & internal medicine Aged Aged 80 and over 030222 orthopedics Monobloc business.industry Straight stem Bone Cements Subsidence (atmosphere) twinSys Arthroplasty Surgery Cemented Treatment Outcome Harris Hip Score Radiological weapon Orthopedic surgery EBRA-FCA Female Hip Joint Hip Prosthesis Implant business Research Article |
| Zdroj: | BMC Musculoskeletal Disorders |
| ISSN: | 1471-2474 |
| DOI: | 10.1186/s12891-016-1247-9 |
| Popis: | Background Cemented stems show good long-term results and the survival of new implants can be predicted by their early subsidence. With EBRA-FCA (Femoral Component Analysis using Einzel-Bild-Röntgen-Analyse) early subsidence as an early indicator for later aseptic loosening can be analysed. For the cemented TwinSys stem mid- and long-term data is only avalible from the New Zeeland Arthroplasty register, thus close monitoring of this implant system is still mandatory. Methods We conducted a 2 year follow up of 100 consecutive hybrid THA (Total hip arthroplasty) of a series of 285 primary THA operated between Jan 2009 und Oct 2010. These 100 received a polished, cemented collarless straight stem (twinSys®, Mathys AG® Bettlach, Switzerland) with an uncemented monobloc pressfit cup (RM pressfit®, Mathys AG® Bettlach, Switzerland). The other patients were treated with the uncemented version of this stem and the same cup. Clinical (Harris Hip Score) and radiological (ap and axial x-rays, cementing quality according to Barrack, alignment) outcomes besides an EBRA-FCA subsidence analysis were performed. Results Median age at operation was 78 (68 to 93) years. 5 patients died in the course of follow-up unrelated to surgery. The KM (Kaplan-Meier) survival at 2 years for the endpoint reoperation for any reason was 94.9 (95 % confidence interval 90.6–100 %). Survival for the endpoint aseptic loosening at 2 years was 100 %. The HHS (Harris Hip Score) improved from 56 (14–86) preoperatively to 95 (60–100) 2 years after the operation. Cementing results were judged 47 % Grade A, 45 % Grade B and 7 % Grade C. Osteolysis was found in 2 stems without clinical symptoms or correlation to subsidence or cementing quality. The EBRA-FCA analysis showed an average subsidence of -0.30 mm (95 % CI -0.5 mm to -0.1 mm). 11 patients showed a subsidence of more than 1 mm. In this group one patient showed a subsidence of 1.5 mm and one of 3.1 mm without further radiological changes. Conclusions The twinSys stem showed excellent clinical and radiologic short term results at 2 years follow-up and seems to be a reliable implant. |
| Databáze: | OpenAIRE |
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