Aims: Restoring the pre-morbid anatomy of the proximal humerus is a goal of anatomical shoulder arthroplasty, but reliance is placed on the surgeon's experience and on anatomical estimations. The purpose of this study was to present a novel method, 'Statistical Shape Modelling', which accurately predicts the pre-morbid proximal humeral anatomy and calculates the 3D geometric parameters needed to restore normal anatomy in patients with severe degenerative osteoarthritis or a fracture of the proximal humerus.
Materials And Methods: From a database of 57 humeral CT scans 3D humeral reconstructions were manually created. The reconstructions were used to construct a statistical shape model (SSM), which was then tested on a second set of 52 scans. For each humerus in the second set, 3D reconstructions of four diaphyseal segments of varying lengths were created. These reconstructions were chosen to mimic severe osteoarthritis, a fracture of the surgical neck of the humerus and a proximal humeral fracture with diaphyseal extension. The SSM was then applied to the diaphyseal segments to see how well it predicted proximal morphology, using the actual proximal humeral morphology for comparison.
Results: With the metaphysis included, mimicking osteoarthritis, the errors of prediction for retroversion, inclination, height, radius of curvature and posterior and medial offset of the head of the humerus were 2.9° (± 2.3°), 4.0° (± 3.3°), 1.0 mm (± 0.8 mm), 0.8 mm (± 0.6 mm), 0.7 mm (± 0.5 mm) and 1.0 mm (± 0.7 mm), respectively. With the metaphysis excluded, mimicking a fracture of the surgical neck, the errors of prediction for retroversion, inclination, height, radius of curvature and posterior and medial offset of the head of the humerus were 3.8° (± 2.9°), 3.9° (± 3.4°), 2.4 mm (± 1.9 mm), 1.3 mm (± 0.9 mm), 0.8 mm (± 0.5 mm) and 0.9 mm (± 0.6 mm), respectively.
Conclusion: This study reports a novel, computerised method that accurately predicts the pre-morbid proximal humeral anatomy even in challenging situations. This information can be used in the surgical planning and operative reconstruction of patients with severe degenerative osteoarthritis or with a fracture of the proximal humerus. Cite this article: 2017;99-B:927-33.
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http://dx.doi.org/10.1302/0301-620X.99B7.BJJ-2017-0014 | DOI Listing |
Shoulder Elbow
January 2025
Orthopaedic and Trauma Surgery Department, Hospital de Terrassa, Terrassa, Barcelona, Spain.
Objectives: To evaluate the clinical significance of stress shielding in patients who have undergone an uncemented reverse shoulder arthroplasty (RSA) with a proximally coated stem for complex proximal humeral fractures (PHF) comprising 3 or 4 parts, assessed at 2 years postoperatively. Additionally, this study aims to examine the correlation between tuberosity healing and clinical outcomes.
Methods: Single Centre.
Int J Surg Case Rep
December 2024
Department of Orthopedics and Traumatology, Faculty of Medicine, Universitas Airlangga, East Java, Surabaya, Indonesia; Department Orthopedics and Traumatology, Dr. Soetomo General Academic Hospital, East Java, Surabaya, Indonesia. Electronic address:
Introduction And Importance: Multifocal fractures in a single upper extremity represent a significant clinical challenge, often resulting from high-energy impacts such as motor vehicle accidents or severe falls. These injuries require complex, multifaceted approaches in management, spanning initial acute care to long-term rehabilitation. This paper examines the complexities of diagnosing, treating, and rehabilitating multifocal upper extremity fractures, highlighting the importance of timely intervention and a multidisciplinary approach to maximize functional recovery, minimize long-term disability and the prognosis.
View Article and Find Full Text PDFJBJS Essent Surg Tech
January 2025
Shoulder and Elbow Service, Florida Orthopaedic Institute, Tampa, Florida.
Background: The incidence of revision shoulder arthroplasty continues to rise, and infection is a common indication for revision surgery. Treatment of periprosthetic joint infection (PJI) in the shoulder remains a controversial topic, with the literature reporting varying methodologies, including the use of debridement and implant retention, single-stage and 2-stage surgeries, antibiotic spacers, and resection arthroplasty. Single-stage revision has been shown to have a low rate of recurrent infection, making it more favorable because it precludes the morbidity of a 2-stage operation.
View Article and Find Full Text PDFEur J Orthop Surg Traumatol
January 2025
Medical Science Faculty of the State University of Campinas, Campinas, Brazil.
Purpose: This systematic review, meta-analysis, and meta-regression aims to determine whether surgical treatment for proximal humeral fractures is superior to non-surgical treatment regarding pain, functionality, complications, and new surgery rates.
Methods: We systematically reviewed clinical trials from PubMed (MEDLINE), EMBASE, Web of Science, Scopus, and Cochrane up to April 2024. Data comparing surgical or conservative of proximal humeral fractures were retrieved for outcomes of pain, functionality, adverse events, and new surgeries.
J Orthop Surg Res
January 2025
Department of Orthopaedic Surgery, Kobe City Medical Center General Hospital, 2-1-1 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan.
Background: Although the Neer and AO/OTA classifications have been widely accepted, observer reliability studies of these two classifications have questioned their reliability and reproducibility to date. We developed an entirely new classification, the Mitsuzawa classification, for dislocated and displaced proximal humeral fractures and tested all three classifications for their intra- and interobserver reliability.
Methods: Two experienced shoulder surgeons and two orthopedic residents independently evaluated the Xray (xR) values of 100 proximal humeral fractures (PHFs).
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