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| Fractures of the Small Metacarpal and Metatarsal (Splint) Bones |  |
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| Fractures of the second and fourth metacarpal and metatarsal (splint) bones are not uncommon. The cause may be from direct trauma, such as interference by the contralateral leg, but splint fractures more often follow a suspensory desmitis (see Suspensory Desmitis) and the resulting fibrous tissue buildup and encapsulation of the distal, free end of the bone. The usual site of these fractures is through the distal end, ~2 in. (5 cm) from the tip. Immediately after the fracture occurs, acute inflammation is present, usually involving the suspensory ligament. A supporting-leg lameness is noted, which may recede after several days rest and recur only after work. |
| Chronic, longstanding fractures cause a supporting-leg lameness at speed. Thickening of the suspensory ligament at and above the fracture site results. The fracture may show a considerable buildup of callus at the fracture site but little tendency to heal. |
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| See Also |
| Introduction |
| The Lameness Examination |
| Overview |
| Imaging Techniques |
| Overview |
| Anatomic Imaging Techniques |
| Physiologic Imaging Techniques |
| Arthroscopy |
| Regional Analgesia |
| Disorders of the Foot |
| Bone Cyst in Pedal Bone |
| Bruised Sole and Corns |
| Canker |
| Contracted Heels |
| Fracture of Navicular Bone |
| Fracture of Pedal Bone |
| Keratoma |
| Laminitis |
| Navicular Disease |
| Pedal Osteitis |
| Puncture Wounds of the Foot |
| Pyramidal Disease |
| Quittor |
| Sandcrack |
| Scratches |
| Seedy Toe |
| Sheared Heels |
| Sidebone |
| Thrush |
| Disorders of the Fetlock and Pastern |
| Fracture of Phalanges and Proximal Sesamoids |
| Osselets |
| Ringbone |
| Sesamoiditis |
| Villonodular Synovitis |
| Windgalls |
| Disorders of the Carpus and Metacarpus |
| Overview |
| Bucked Shins |
| Degenerative Subchondral Lesions of the Carpal Bones |
| Desmitis or Sprain of the Inferior Check Ligament |
| Fracture of the Carpal Bones |
| Intra-articular Osteochondral Chip Fragments of the Carpus |
| Carpal Slab Fractures |
| Accessory Carpal Bone Fractures |
| Fracture of the Third Metacarpal (Cannon) Bone |
| Hygroma |
| Osteoarthritis (Degenerative Joint Disease) |
| Osteochondrosis |
| Osteochondroma of the Distal Radius (Supracarpal Exostosis) |
| Rupture of the Common Digital Extensor Tendon |
| Splints |
| Subchondral Cysts and Septic Arthritis |
| Suspensory Desmitis |
| Synovial Hernia and Ganglion and Synovial Fistulae |
| Tearing of the Medial Palmar Intercarpal Ligament |
| Tenosynovitis of the Tendon Sheaths Associated with the Carpus |
| Traumatic Synovitis and Capsulitis |
| Disorders of the Shoulder and Elbow |
| Arthritis of the Shoulder Joint |
| Bicipital Bursitis |
| Fractures of the Elbow |
| Fractures of the Shoulder |
| Sweeney |
| Disorders of the Tarsus |
| Overview |
| Bog Spavin |
| Bone Spavin |
| Curb |
| Displacement of Superficial Flexor Tendon from the Point of the Hock |
| Fracture of the TArsus |
| Hindlimb Tendon Ruptures |
| Rupture of the Peroneus Tertius Muscle |
| Stringhalt |
| Thoroughpin |
| Disorders of the Stifle |
| Fracture of the Stifle |
| Gonitis |
| Patellar Luxation |
| Subchondral Bone Cyst |
| Disorders of the Hip |
| Coxitis |
| Dislocation of the Hip |
| Pelvic Fracture |
| Trochanteric Bursitis |
| Disorders of the Back |
| Fractures |
| Muscle and Ligament Strain |
| Ossifying Spondylosis |
| Overriding of the Dorsal Spinous Processes |
| Sacroiliac Injury |
| Developmental Orthopedic Disease |
| Overview |
| Osteochondrosis |
| Physitis |
| Flexion Deformities |
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