Evaluation of the insertion torque of cortical screws applied in different regions of the third metacarpal bone of horses

• Grant number: 24/23054-3
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2025
• End date: May 31, 2026
• Field of knowledge: Agronomical Sciences - Veterinary Medicine - Animal Clinics and Surgery
• Principal Investigator: André Luis do Valle de Zoppa
• Grantee: Iara Rocha de Almeida
• Host Institution: Faculdade de Medicina Veterinária e Zootecnia (FMVZ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Equine orthopedics is crucial, especially for competition animals, as injuries can compromise their performance and quality of life. The use of cortical screws in these orthopedic corrections is extremely common. The insertion of these screws is manually performed by the surgeon; however, the applied torque force is subjective and may be insufficient or even lead to failure. This study aims to evaluate the torque and compare the insertion precision between professionals with different levels of experience. This analysis seeks to enhance knowledge about the ideal insertion force, contributing to improved surgical outcomes and equine recovery.The method involves using 12 equine thoracic limbs, divided into two groups: screws will be inserted by a newly graduated professional in Group 1 and by an experienced professional in Group 2. Screw insertion will follow a standardized technique, and the torque will be measured with a specially calibrated digital torque meter.The study also considers the regional distribution of torque across different parts of the bone (epiphysis, metaphysis, and diaphysis) to identify insertion patterns. The obtained results will be statistically analyzed to detect significant differences in torque application between the groups.The data from this research will aid in optimizing surgical techniques, improving how professionals secure screws during procedures, reducing complications, and ensuring a more efficient recovery for horses undergoing orthopedic interventions.