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Strain distribution in the proximal human femur

2001; British Editorial Society of Bone & Joint Surgery; Volume: 83; Issue: 2 Linguagem: Inglês

10.1302/0301-620x.83b2.10108

2044-5377

Young-Hoo Kim, J.-S. Kim, Soon-Ho Cho,

Total Knee Arthroplasty Outcomes

The Journal of Bone and Joint Surgery. British volumeVol. 83-B, No. 2 ResearchFree AccessStrain distribution in the proximal human femurAN IN VITRO COMPARISON IN THE INTACT FEMUR AND AFTER INSERTION OF REFERENCE AND EXPERIMENTAL FEMORAL STEMSY.-H. Kim, J.-S. Kim, S.-H. ChoY.-H. KimDirector and PresidentJoint Replacement Centre of Korea, Hae Min General Hospital, 627-3, Ja Yang 1-Dong, Kwang Jin-Gu, Seoul, Korea 143–191., J.-S. KimOrthopaedic SurgeonJoint Replacement Centre of Korea, Hae Min General Hospital, 627-3, Ja Yang 1-Dong, Kwang Jin-Gu, Seoul, Korea 143–191., S.-H. ChoOrthopaedic SurgeonJoint Replacement Centre of Korea, Hae Min General Hospital, 627-3, Ja Yang 1-Dong, Kwang Jin-Gu, Seoul, Korea 143–191.Published Online:1 Mar 2001https://doi.org/10.1302/0301-620X.83B2.0830295AboutSectionsPDF/EPUB ToolsAdd to FavouritesDownload CitationsTrack CitationsPermissions ShareShare onFacebookTwitterLinked InRedditEmail AbstractSix pairs of human cadaver femora were divided equally into two groups one of which received a non-cemented reference implant and the other a very short non-dependent experimental implant. Thirteen strain-gauge rosettes were attached to the external surface of each specimen and, during application of combined axial and torsional loads to the femoral head, the strains in both groups were measured.After the insertion of a non-cemented femoral component, the normal pattern of a progressive proximal-to-distal increase in strains was similar to that in the intact femur and the strain was maximum near the tip of the prosthesis. On the medial and lateral aspects of the proximal femur, the strains were greatly reduced after implantation of both types of implant. The pattern and magnitude of the strains, however, were closer to those in the intact femur after insertion of the experimental stem than in the reference stem. On the anterior and posterior aspects of the femur, implantation of both types of stem led to increased principal strains E1, E2 and E3. This was most pronounced for the experimental stem.Our findings suggest that the experimental stem, which has a more anatomical proximal fit without having a distal stem and cortex contact, can provide immediate postoperative stability. Pure proximal loading by the experimental stem in the metaphysis, reduction of excessive bending stiffness of the stem by tapering and the absence of contact between the stem and the distal cortex may reduce stress shielding, bone resorption and thigh pain.FiguresReferencesRelatedDetailsCited byBiomechanical analysis of two medial buttress plate fixation methods to treat Pauwels type III femoral neck fractures14 January 2022 | BMC Musculoskeletal Disorders, Vol. 23, No. 1Long-Term Results (Minimum of 20 Years) of a Pure Proximal-Loading Metaphyseal-Fitting Anatomic Cementless Stem Without Distal Stem Fixation in Hip ArthroplastyThe Journal of Arthroplasty, Vol. 79A Time-Dependent Design Concept of a Cementless Hip Stem Prosthesis for Improving Physiological Load Transfer in Proximal Femur: A Finite Element Analysis28 July 2022 | Journal of Medical and Biological Engineering, Vol. 42, No. 4Resultado del vástago corto con preservación del cuello femoral CFP con un seguimiento mínimo de 10 añosRevista Española de Cirugía Ortopédica y Traumatología, Vol. 66, No. 3[Translated article] Results of the short neck-retaining stem prostheses CFP with a minimum follow-up of 10 yearsRevista Española de Cirugía Ortopédica y Traumatología, Vol. 66, No. 3Biomaterials and Their Biomedical Applications: From Replacement to Regeneration29 October 2021 | Processes, Vol. 9, No. 11Trends in Total Hip Arthroplasty in Germany from 2007 to 2016: What Has Changed and Where Are We Now?11 November 2019 | Zeitschrift für Orthopädie und Unfallchirurgie, Vol. 159, No. 02Is the strain pattern of conventional stems negatively affected by a previously short stem THA? 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