Scapular geometry is complex, and a screw-placement technique for optimizing glenoid component fixation with an Aequalis Reversed Shoulder Prosthesis (Tornier, Inc., Edina, MN) has not yet been described. Ten cadaveric human scapulae were implanted with 2 types of reverse arthroplasty baseplates, 1 with fixed-angle locking screw holes and 1 with multidirectional locking screw holes. Optimal screw placement was defined as that which maximized screw length, accomplished far cortical fixation, and attained screw purchase in good bone stock. An anterior cruciate ligament drill guide was used to find the ideal trajectory for each screw. Trajectory angles of the screws relative to the face of the baseplate are presented for what we believe is best possible fixation. Awareness of the 3 major columns of scapular bone (the base of coracoid, the spine, and the pillar) and utilization of a baseplate with variable-angle locking screws will allow optimal initial fixation of the glenosphere.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jse.2008.05.038 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Clinical Efficacy of Three-Dimensional-Printed Pure Titanium Fracture Plates with Locking Screw Systems in Distal Tibia Fractures.
Medicina (Kaunas)
January 2025
Department of Orthopedic Surgery, Anam Hospital, Korea University College of Medicine, 73 Goryeodae-ro Seongbuk-gu, Seoul 02841, Republic of Korea.
Distal tibia fractures are high-energy injuries characterized by a mismatch between standard plate designs and the patient's specific anatomical bone structure, which can lead to severe soft tissue damage. Recent advancements have focused on the development of customized metal plates using three-dimensional (3D) printing technology. However, 3D-printed metal plates using titanium alloys have not incorporated a locking system due to the brittleness of these alloys.
View Article and Find Full Text PDFMultiplanar Semicircular New-Generation Implant System Developed for Proximal Femur Periprosthetic Fractures: A Biomechanical Study.
Medicina (Kaunas)
January 2025
Department of Orthopedics and Traumatology, Karabük University, Karabük 78050, Turkey.
The study aimed to evaluate a newly designed semicircular implant for the fixation of Vancouver Type B1 periprosthetic femoral fractures (PFFs) in total hip arthroplasty (THA) patients. To determine its strength and clinical applicability, the new implant was compared biomechanically with conventional fixation methods, such as lateral locking plate fixation and a plate combined with cerclage wires. : Fifteen synthetic femur models were used in this biomechanical study.
View Article and Find Full Text PDFIncreased stiffness with medial column screw supplementation of lateral locking plate for distal femur fractures: a biomechanical study.
Arch Orthop Trauma Surg
January 2025
Department of Orthopaedics, Wright State University, 30 E Apple St., Suite 2200, Dayton, OH, 45409, USA.
Introduction: We propose and assess the biomechanical stability of medial column screw supplementation in a synthetic distal femur fracture model.
Materials And Methods: Twenty-four low density synthetic femora modeling osteoporotic, intraarticular distal femur fractures with medial metaphyseal comminution were split into two fixation groups: (1) lateral locking distal femur plate (PA- plate alone) and (2) lateral locking distal femur plate with a 6.5 mm fully threaded medial cannulated screw (PWS- plate with screw).
Far Cortical Locking Versus Standard Constructs for Locked Plate Fixation in the Treatment of Acute, Displaced Fractures of the Distal Femur: A Multicenter Randomized Trial.
J Bone Joint Surg Am
October 2024
Department of Orthopaedics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada.
Background: Fixation of distal femoral fractures remains a challenge, and nonunions are common with standard constructs. Far cortical locking (FCL) constructs have been purported to lead to improved fracture-healing as compared with that achieved with traditional locking bridge plates. We sought to test this hypothesis in a comparative effectiveness clinical trial.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!