Mid-Term Study of Bone Remodeling After Femoral Cemented Stem Implantation: Comparison Between DXA and Finite Element Simulation

• Published in: The Journal of arthroplasty Vol. 29; no. 1; pp. 90 - 100
• Main Authors: Herrera, Antonio, MD, PhD, Rebollo, Sarai, MD, PhD, Ibarz, Elena, PhD, Mateo, Jesús, MD, PhD, Gabarre, Sergio, MEng, Gracia, Luis, PhD
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 2014
• Subjects: Absorptiometry, Photon; Aged; Arthroplasty, Replacement, Hip; Biomechanical Phenomena; Bone Density; bone remodeling; Bone Remodeling - physiology; Cementation; cemented prostheses; Computer Simulation; DXA; Female; Femur - physiopathology; Femur - surgery; Finite Element Analysis; finite elements; Follow-Up Studies; hip prostheses; Hip Prosthesis; Humans; Male; Models, Biological; Orthopedics; Osteoarthritis, Hip - physiopathology; Osteoarthritis, Hip - surgery; Prospective Studies; bone remodeling; hip prostheses; DXA; cemented prostheses; finite elements
• ISSN: 0883-5403; 1532-8406
• DOI: 10.1016/j.arth.2013.03.028

Abstract This five-year prospective study was designed to investigate periprosthetic bone remodeling associated with two cemented stem models, ABG-II (Stryker) and VerSys (Zimmer), randomly implanted in patients older than 75 years. The sample consisted of 64 cases (32, ABG-II; 32, VerSys). Inclusion criterion was diagnosis of osteoarthritis recommended for cemented total hip arthroplasty. Besides clinical study, Finite Element (FE) simulation was used to analyze biomechanical changes caused by hip arthroplasty. Bone Mineral Density (BMD) measurements showed a progressive increase in bone mass throughout the entire follow-up period for both stems, well correlated with FE results except in Gruen zones 4, 5, 6 for ABG-II and in zones 4, 5 for VerSys, denoting that remodeling in those zones does not depend on mechanical factors but rather on biological or physiological ones.