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  • Author or Editor: Jenna M. Young x
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OBJECTIVE To determine effects for 2 IV regional limb perfusion (IVRLP) protocols involving tiludronate on lameness of horses with navicular syndrome.

ANIMALS 15 horses with bilateral forelimb navicular syndrome.

PROCEDURES Shoeing and anti-inflammatory injection into the distal interphalangeal joint (DIPJ) of both forelimbs (day 0) were performed on all horses. On day 14, horses received 1 of 3 IVRLPs consisting of 0.1 mg of tiludronate/kg (low-dose tiludronate [LDT]; n = 5), 0.2 mg of tiludronate/kg (high-dose tiludronate [HDT]; 5), or saline (0.9% NaCl) solution (placebo; 5); treatments were repeated at days 24 and 34. Lameness severity of both forelimbs was evaluated via subjective evaluation and force plate analysis before and after shoeing on day 0 and at days 14, 34, 60, and 120. Mean subjective lameness score and peak vertical ground reaction force (PVGRF) for the more severely lame forelimb (LFL) and both (combined) forelimbs (CFL) were compared over time.

RESULTS For all horses, mean PVGRF for the LFL and CFL was increased at 14 days. No difference in mean subjective lameness score or mean PVGRF was detected within groups at any time. Mean PVGRF of the CFL was higher for the HDT group than the LDT and placebo groups only at 120 days.

CONCLUSIONS AND CLINICAL RELEVANCE Use of the tiludronate IVRLP protocols described here provided no further improvement in lameness over therapeutic shoeing and anti-inflammatory injection of the DIPJ in horses with navicular syndrome. However, HDT-treated horses were objectively less lame than LDT- or placebo-treated horses at 120 days.

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in American Journal of Veterinary Research



To describe outcomes of horses with temporohyoid osteoarthropathy (THO) treated with partial ceratohyoidectomy.


10 client-owned horses


Medical records from 2 institutions were examined for records of horses with THO treated with partial ceratohyoidectomy between 2010 and 2021. History, signalment, clinical signs, diagnostics, medications, and surgery-related details were recorded. Horses with a minimum of 6 months follow-up were recruited for neurologic and imaging examinations in the hospital or field where radiography of the basihyoid-ceratohyoid articulation were performed along with CT, when available.


10 horses with THO were included (9 unilateral; 1 bilateral). Nine planned partial ceratohyoidectomies were performed in 8 horses, whereas 2 horses had preoperatively planned complete ceratohyoidectomies transitioned to partial ceratohyoidectomies during surgery due to intraoperative complications. Postoperative complications occurred mostly in transitioned surgeries (obstructed airway, tongue mobility issues, and incisional hemorrhage), whereas only 1 horse with a planned ceratohyoidectomy had postoperative complication of rhabdomyolysis. All complications resolved before hospital discharge. Neurologic signs improved in all 10 horses, with 2 showing complete resolution. Nine horses were available for radiographic follow-up, 6 of which also had head CT scans. A space between the ceratohyoid and basihyoid bones was measurable on radiography in all 9 horses, and was confirmed on CT. Three horses demonstrated proliferation of either ceratohyoid or basihyoid bones. The 9 horses with unilateral disease returned to previous work, and the horse with bilateral disease was retired.


Partial ceratohyoidectomy is a surgical option for treatment of THO that provides similar clinical outcomes to published reports on ceratohyoidectomy.

Full access
in Journal of the American Veterinary Medical Association