Descripción
Pionero, probado e isoelástico RM Pressfit vitamys
PIONERO
Ya en la década de 1970, Robert Mathys (padre) perseguía la idea pionera de desarrollar implantes monobloque isoelásticos1. Esta idea en combinación con el «pressfit» ecuatorial 2,3, descrito por el Prof. Erwin Morscher, y la opción tribológica de un polietileno altamente reticulado enriquecido con vitamina E (VEPE)4 dio lugar al exclusivo cotilo RM Pressfit vitamys.
PROBADO
La filosofía fundamental acreditada a lo largo de muchos años y basada en la ley de Wolff1,5 convence con unos resultados clínicos sobresalientes6–10 y unos datos de los registros internacionales excelentes11–15.
ISOELÁSTICO
El cotilo RM Pressfit vitamys posee la misma elasticidad que el hueso circundante16, lo que influye positivamente sobre el comportamiento de stress shielding (osteoporosis proximal por transferencia de cargas)17,25,26.
PRESERVACIÓN ÓSEA
La combinación del polietileno vitamys isoelástico y resistente al desgaste (VEPE)4 con un espesor de pared máximo17–19 y un recubrimiento con partículas de titanio reduce el riesgo de osteólisis4,7,20–23 y conserva el hueso circundante a largo plazo10,24–27.
EFICIENTE
Los sencillos instrumentos típicos de Mathys favorecen un flujo de trabajo eficiente. Además, el diseño monobloque del cotilo RM Pressfit vitamys permite un inventario de implantes mínimo a pesar de la amplia gama de tamaños.
1 Mathys R. History – How the success story of the RM Classic cup started. In: Horne G (Editor). The RM Cup – Long-term experience with an elastic Monobloc acetabular implant. Einhorn-Presse Verlag. ISBN ISBN 978-3-88756-507-7. 2008;23-30.
2 Morscher E, Masar Z. Development and first experience with an uncemented press-fit cup. Clin Orthop Relat Res. 1988(232):96-103.
3 Morscher E W, Dick W. Cementless fixation of «isoelastic» hip endoprostheses manufactured from plastic materials. Clin Orthop Relat Res. 1983(176):77-87.
4 Beck M, Delfosse D, Lerf R, Becker R, French G, Hollmann L, Knahr K, Naeder H, Meijer E, Rehbein P, Baines J, Steenmeijer V, de Gast A. Oxidation Prevention with Vitamin E in a HXLPE Isoelastic Monoblock Pressfit Cup: Preliminary Results. In: Knahr K (Editor). Total Hip Arthroplasty. Springer Berlin Heidelberg. ISBN 978-3-642-27360-5. 2012;21-31.
5 Wolff J (Editor). Das Gesetz der Transformation der Knochen. ISBN ISBN 978-3-86805-648-8. 1892.
6 Erivan R, Eymond G, Villatte G, Mulliez A, Myriam G, Descamps S, Boiscgard S. RM Pressfit® cup: good preliminary results at 5 to 8 years follow-up for 189 patients. Hip Int. 2016.
7 Mahmood F F, Beck M, de Gast A, Rehbein P, French G J, Becker R, Dominkus M, Helmy N, Hollmann L, Baines J. Survivorship and Patient-Reported Outcomes of an Uncemented Vitamin E-Infused Monoblock Acetabular Cup: A Multicenter Prospective Cohort Study. J Arthroplasty. 2020.
8 Snijders T E, Halma J J, Massier J R A, van Gaalen S M, de Gast A. The Survivorship of the Uncemented Iso-Elastic Monoblock Acetabular Component at a Mean of 6-Year Follow-up. HSS Journal®. 2019.
9 Minten M J, Heesterbeek P J, Spruit M. No effect of additional screw fixation of a cementless, all-polyethylene press-fit socket on migration, wear, and clinical outcome. Acta Orthop. 2016:1-5.
10 Ihle M, Mai S, Pfluger D, Siebert W. The results of the titanium-coated RM acetabular component at 20 years: a long-term follow-up of an uncemented primary total hip replacement. J Bone Joint Surg Br. 2008;90(10):1284-90.
11 SIRIS. Swiss National Joint Registry – Annual Report 2021
12 NZJR. New Zealand Joint Registry – Annual Report. 2021
13 LROI. Dutch Arthroplasty Register – Annual Report. 2021
14 EPRD. Endoprothesenregister Deutschland – Jahresbericht. 2021
15 AOANJRR. Australian Orthopaedic Association National Joint Replacement Registry – Annual Report. 2021
16 Gasser B. Biomechanical principles and studies. In: Horne G (Editor). The RM Cup – Long-term experience with an elastic Monobloc acetabular implant. Einhorn-Presse Verlag. ISBN ISBN 978-3-88756-507-7. 2008;16-22.
17 Horne G, Devane P A, Dalton D J. Does pelvic osteolysis occur with a nonmodular uncemented acetabular component? J Arthroplasty. 2006;21(2):185-90.
18 Oonishi H, Iwaki H, Kin N, Kushitani S, Murata N, Wakitani S, Imoto K. The effects of polyethylene cup thickness on wear of total hip prostheses. J Mater Sci Mater Med. 1998;9(8):475-8.
19 Young A M, Sychterz C J, Hopper R H, Jr., Engh C A. Effect of acetabular modularity on polyethylene wear and osteolysis in total hip arthroplasty. J Bone Joint Surg Am. 2002;84-a(1):58-63.
20 Wyatt M, Weidner J, Pfluger D, Beck M. The RM Pressfit vitamys: 5-year Swiss experience of the first 100 cups. Hip Int. 2017;27(4):368-72.
21 Rochcongar G, Buia G, Bourroux E, Dunet J, Chapus V, Hulet C. Creep and Wear in Vitamin E-Infused Highly Cross-Linked Polyethylene Cups for Total Hip Arthroplasty: A Prospective Randomized Controlled Trial. J Bone Joint Surg Am. 2018;100(2):107-14.
22 Scemama C, Anract P, Dumaine V, Babinet A, Courpied J P, Hamadouche M. Does vitamin E-blended polyethylene reduce wear in primary total hip arthroplasty: a blinded randomised clinical trial. Int Orthop. 2016.
23 Rochcongar G, Remazeilles M, Bourroux E, Dunet J, Chapus V, Feron M, Praz C, Buia G, Hulet C. Reduced wear in vitamin E-infused highly cross-linked polyethylene cups: 5-year results of a randomized controlled trial. Acta Orthop. 2020:1-5.
24 Manley M T, Ong K L, Kurtz S M. The potential for bone loss in acetabular structures following THA. Clin Orthop Relat Res. 2006; 453:246-53.
25 Brodt S, Jacob B, Nowack D, Zippelius T, Strube P, Matziolis G. An Isoelastic Monoblock Cup Retains More Acetabular and Femoral Bone Than a Modular Press-Fit Cup: A Prospective Randomized Controlled Trial. J Bone Joint Surg Am. 2021.
26 Young P S, Macarico D T, Silverwood R K, Farhan-Alanie O M, Mohammed A, Periasamy K, Nicol A, Meek R M D. Anatomical pelvic loading of a monoblock polyethylene acetabular component. Bone Joint J. 2021;103-b(5):872-80.
27 Anderl C, Mattiassich G, Ortmaier R, Steinmair M, Hochreiter J. Peri-acetabular bone remodelling after uncemented total hip arthroplasty with monoblock press-fit cups: an observational study. BMC Musculoskelet Disord. 2020;21(1):652.