caa a22 4500 60545728X CHVBK 20210128100222.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s00167-014-2914-8 doi (NATIONALLICENCE)springer-10.1007/s00167-014-2914-8 A matched-pair comparison of two different locking plates for valgus-producing medial open-wedge high tibial osteotomy: peek-carbon composite plate versus titanium plate [Elektronische Daten] [Matthias Cotic, Stephan Vogt, Stefan Hinterwimmer, Matthias Feucht, Julia Slotta-Huspenina, Tibor Schuster, Andreas Imhoff] Purpose: The first purpose of this study was to compare the clinical and radiographic outcome of two different locking plates used for valgus-producing medial open-wedge high tibial osteotomy (HTO). The second purpose was to histologically evaluate peek-carbon wear for biocompatibility. Methods: Twenty-six consecutive patients undergoing open-wedge HTO using the first-generation PEEKPower HTO-Plate® (Group I) were matched with 26 patients after open-wedge HTO with the TomoFix™ plate (Group II). Clinical scores (visual analogue scale for pain, WOMAC, Lysholm score) were obtained preoperatively and at a minimum follow-up of 24months postoperatively. Fixation stability was evaluated radiographically by comparing the medial proximal tibial angle (MPTA) and tibial slope 2days after open-wedge HTO and after implant removal. Tissue samples of Group I were collected at the time of implant removal for histologic evaluation. Results: Implant-related complications occurred in 15% (n=4) of Group I and 0% of Group II. Out of them, 3 implant replacements were excluded from statistical analyses. After a final median follow-up of 25months (range 24-31), the clinical scores in both groups showed significant improvements compared to preoperatively (visual analogue scale, WOMAC, Lysholm score; p<0.001), without significant group differences (visual analogue scale, n.s.; WOMAC, n.s.; Lysholm score, n.s.). No significant differences between baseline and follow-up measurements for MPTA and tibial slope were observed within each group (MPTA: Gr. I, n.s.; Gr. II, n.s.; tibial slope: Gr. I, n.s.; Gr. II, n.s.) or between the two groups (MPTA, n.s.; tibial slope, n.s.). In histologic samples, CF PEEK abrasion did not induce inflammation or tissue necrosis. Conclusion: The first-generation PEEKPower HTO-Plate® provided a higher rate of implant-related complications compared to the TomoFix™ plate at a minimum follow-up of 24months after valgus-producing open-wedge HTO. Therefore, it is not recommended to use the first-generation PEEKPower HTO-Plate® in the clinical practice. Level of evidence: III. Springer-Verlag Berlin Heidelberg, 2014 High tibial osteotomy nationallicence Open wedge nationallicence PEEKPower HTO-plate nationallicence TomoFix plate nationallicence Cotic Matthias Department of Orthopaedic Sports Medicine, Technical University of Munich, Ismaningerstr. 22, 81675, Munich, Germany aut Vogt Stephan Department of Orthopaedic Sports Medicine, Technical University of Munich, Ismaningerstr. 22, 81675, Munich, Germany aut Hinterwimmer Stefan Sportsclinic Germany GmbH, Munich, Germany aut Feucht Matthias Department of Orthopaedic Sports Medicine, Technical University of Munich, Ismaningerstr. 22, 81675, Munich, Germany aut Slotta-Huspenina Julia Institute of Pathology, Technical University of Munich, Munich, Germany aut Schuster Tibor Department of Biostatistics, Epidemiology and Occupational Health, McGill University Montreal, Montreal, Canada aut Imhoff Andreas Department of Orthopaedic Sports Medicine, Technical University of Munich, Ismaningerstr. 22, 81675, Munich, Germany aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/7(2015-07-01), 2032-2040 0942-2056 23:7<2032 2015 23 167 https://doi.org/10.1007/s00167-014-2914-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-014-2914-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cotic Matthias Department of Orthopaedic Sports Medicine, Technical University of Munich, Ismaningerstr. 22, 81675, Munich, Germany aut NATIONALLICENCE 700 1- Vogt Stephan Department of Orthopaedic Sports Medicine, Technical University of Munich, Ismaningerstr. 22, 81675, Munich, Germany aut NATIONALLICENCE 700 1- Hinterwimmer Stefan Sportsclinic Germany GmbH, Munich, Germany aut NATIONALLICENCE 700 1- Feucht Matthias Department of Orthopaedic Sports Medicine, Technical University of Munich, Ismaningerstr. 22, 81675, Munich, Germany aut NATIONALLICENCE 700 1- Slotta-Huspenina Julia Institute of Pathology, Technical University of Munich, Munich, Germany aut NATIONALLICENCE 700 1- Schuster Tibor Department of Biostatistics, Epidemiology and Occupational Health, McGill University Montreal, Montreal, Canada aut NATIONALLICENCE 700 1- Imhoff Andreas Department of Orthopaedic Sports Medicine, Technical University of Munich, Ismaningerstr. 22, 81675, Munich, Germany aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/7(2015-07-01), 2032-2040 0942-2056 23:7<2032 2015 23 167