Total hip resurfacing has long been conceptually attractive to both surgeons and patients. However, historically it has been plagued by limited durability and marked acetabular bone loss. The recent development of wear-resistant bearings, such as metal-on-metal, has led to renewed interest in hip resurfacing in the orthopedic community. Several resurfacing implants have been designed and positive results, particularly in young patients, have been reported. Although comparative studies of hip resurfacing and standard total hip replacement are still lacking, we believe that there is now evidence to demonstrate that this surgical concept deserves consideration, particularly when treating young patients with hip diseases.
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Micro-CT Assessment During Embedding of Prototype Ti Alloy Multi-Spiked Connecting Scaffold in Subchondral Trabecular Bone of Osteoarthritic Femoral Heads, Depending on Host BMI.
J Funct Biomater
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Adult Spine Orthopaedics Department, W. Dega Orthopaedic and Rehabilitation Clinical Hospital, Poznan University of Medical Sciences, 28 Czerwca 1956 Street 135/147, 61-545 Poznan, Poland.
The prototype of a biomimetic multi-spiked connecting scaffold (MSC-Scaffold) represents an essential innovation in the fixation in subchondral trabecular bone of components for a new generation of entirely cementless hip resurfacing arthroplasty (RA) endoprostheses. In designing such a functional biomaterial scaffold, identifying the microstructural and mechanical properties of the host bone compromised by degenerative disease is crucial for proper post-operative functioning and long-term maintenance of the endoprosthesis components. This study aimed to explore, depending on the occurrence of obesity, changes in the microstructure and mechanical properties of the subchondral trabecular bone in femoral heads of osteoarthritis (OA) patients caused by the MSC-Scaffold embedding.
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Südtiroler Sanitätsbetrieb, Department Orthopaedic Surgery, Brixen, Italy.
Background: Unrestricted kinematic alignment (uKA) in total knee arthroplasty (TKA) has the theoretical advantage of reproducing patients' constitutional alignment and restoring the pre-arthritic joint line position and obliquity. However, modifications of the original uKA technique have been proposed due to the potential risk of mechanical failure and instability. Given the significant variability in soft tissue behavior within the same bony morphology group, uKA pure knee resurfacing could be occasionally detrimental.
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Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
Purpose: Hip resurfacing arthroplasty (HRA) is recommended for younger patients seeking higher levels of activity. However, femoroacetabular cup impingement (FACI) between the femoral neck and acetabular prosthesis remains a concern. This study aimed to determine the incidence, risk factors, and prognostic consequences of FACI after HRA.
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Department of Orthopaedic Surgery, Kyung Hee University College of Medicine, Kyung Hee University Medical Center, 26 Kyunghee-daero, Dongdaemun-gu, Seoul, 02447, Korea.
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Biomechanical Evaluation of a Femoral Implant for Hip Resurfacing Arthroplasty in Dogs: An Ex Vivo Study.
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Department of Clinic and Veterinary Surgery, School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Jaboticabal, Sao Paulo, Brazil.
Article Synopsis
- - The study aimed to evaluate how stable a hip resurfacing prosthesis is in dog cadaver femurs using various biomechanical tests.
- - Twenty canine femurs were tested, with one femur receiving the prosthesis and the other remaining intact; the tests measured load capacity and displacement during stress.
- - Results showed that the prosthesis had lower maximum load and load at collapse values compared to intact femurs, but similar behavior in terms of displacement and stiffness, indicating some limitations in the prosthesis's performance.
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