🔍 Key Findings

• The Canine Humeral Anatomic Plating System (CHAPS) was designed using CT-based 3D modeling of 100 canine humeri from 5–50 kg.
• Four plate sizes (TP1–TP4) were developed to accommodate a wide range of canine body sizes.
• Plate contour fit was evaluated across 48 cadaveric limbs and showed a 97.5% median surface match, demonstrating excellent topographic conformity.
• Screw hole placement avoided 95–100% of critical anatomical structures including the supratrochlear foramen and nutrient foramen.
• The plates were designed for use with locking screws, improving biomechanical stability for humeral diaphyseal fractures.
• CHAPS plates showed consistent alignment with humeral curvature in both craniocaudal and mediolateral planes.
• CT data revealed marked breed and size variation, but the multi-size design achieved broad anatomical applicability.
• The system provides an anatomic solution with potentially fewer intraoperative contouring needs and reduced iatrogenic risk.