Tiludronate as a new therapeutic agent in the treatment of navicular disease: a double-blind placebo-controlled clinical trial.
BACKGROUND
Bisphosphonates, such as tiludronate, are used to normalise bone metabolism via inhibition of bone resorption. Areas of increased bone resorption and formation are typical lesions in a diseased navicular bone.


OBJECTIVE
To determine if bone remodelling changes occurring in navicular disease may be corrected with therapies regulating bone metabolism.


METHODS
We designed a double-blind, placebo-controlled clinical trial to compare 2 doses of tiludronate, 0.5 mg/kg and 1 mg/kg bwt administered via daily i.v. injections over 10 days for the treatment of navicular disease. Seventy-three horses, split into 2 subpopulations of recent and chronic cases, were enrolled to be followed-up over 6 months. Of these, 33 recent and 17 chronic cases meeting the selection criteria were maintained in the final efficacy analyses. Clinical examinations were videorecorded and reviewed blindly by an independent expert.


RESULTS
Horses treated with the higher dose showed optimal improvement of lameness and return to normal level of activity 2-6 months post treatment. The more recent the onset of clinical signs at the time of treatment, the greater the efficacy. The treatment did not modify the response to extension and flexion tests. The lower dose failed to significantly improve the condition.


CONCLUSIONS
Tiludronate efficacy is demonstrated in the treatment of navicular disease at the dose of 1 mg/kg bwt.


CONCLUSIONS
Our results support the clinical relevance of bone remodelling changes in the outcome of navicular disease.
Denoix
J M
JM
CIRALE/ENVA IPC, Goustranville, 14430 Dozulé, France.
Thibaud
D
D
Riccio
B
B
D000818:Animals; D001862:Bone Resorption / Q000188:drug therapy / Q000662:veterinary*; D004164:Diphosphonates / Q000627:therapeutic use*; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D005260:Female; D005534:Foot Diseases / Q000188:drug therapy / Q000662:veterinary*; D006724:Hoof and Claw; D006734:Horse Diseases / Q000188:drug therapy*; D006736:Horses; D007275:Injections, Intravenous / Q000662:veterinary; D007794:Lameness, Animal / Q000188:drug therapy*; D008297:Male; D010000:Osteitis / Q000188:drug therapy / Q000662:veterinary; D016896:Treatment Outcome; D014741:Video Recording
D004164:Diphosphonates; C058651:tiludronic acid