Peer-reviewed veterinary case report
How shoulder muscles help dogs move with custom humerus implants
By Le Bras, Linh-Aurore et al.·Published in PloS one·2022·Department of Mechanical Engineering, Canada·View original on PubMed →
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Original publication title: Personalized endoprostheses for the proximal humerus and scapulohumeral joint in dogs: Biomechanical study of the muscles' contributions during locomotion.
- Species:
- dog
Plain-English summary
A dog with osteosarcoma, a type of bone cancer, in the shoulder area was treated with a custom-made prosthetic joint instead of the usual amputation or limb-sparing surgery. This new approach aims to maintain some movement and stability in the shoulder while reducing complications and improving the dog's quality of life. The study looked at how well different muscle groups worked with the prosthetic joint during walking, helping to refine the design for better function. The goal is to provide dogs with a better option that allows them to move more comfortably after treatment.
People also search for: dog osteosarcoma treatment · custom prosthetic joint for dogs · dog shoulder cancer surgery options
Abstract
Osteosarcoma represents one of the most common bone tumours in dogs. It commonly occurs in the proximal humerus, the most affected anatomic site. Until recently, amputation or limb-sparing surgery leading to an arthrodesis coupled with chemotherapy were the only available treatments, but they often lead to complications, reduced mobility and highly impact dog's quality of life. Prototypes of both articulated and monobloc (no mobility) patient-specific endoprostheses have been designed to spare the limb afflicted with osteosarcoma of the proximal humerus. This study focuses on the biomechanical effects of endoprostheses and shoulder muscle kinematics. For each of the endoprosthesis designs, a minimal number of muscles needed to ensure stability and a certain degree of joint movement during walking is sought. A quasi-static study based on an optimization method, the minimization of the sum of maximal muscle stresses, was carried out to assess the contribution of each muscle to the shoulder function. The identification of the most important muscles and their impact on the kinematics of the prosthetic joint lead to an improvement of the endoprosthesis design relevance and implantation feasibility.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/35073361/