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Long‐term effects of tibial plateau leveling osteotomy and tibial tuberosity advancement on tibial plateau subchondral bone density in dogs
Author(s) -
Leach Elizabeth S.,
Krotscheck Ursula,
Goode Kelsey J.,
Hayes Galina M.,
Böttcher Peter
Publication year - 2018
Publication title -
veterinary surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 79
eISSN - 1532-950X
pISSN - 0161-3499
DOI - 10.1111/vsu.12790
Subject(s) - medicine , cruciate ligament , osteoarthritis , stifle joint , orthopedic surgery , hounsfield scale , tibia , plateau (mathematics) , high tibial osteotomy , computed tomography , orthodontics , surgery , anterior cruciate ligament , mathematical analysis , alternative medicine , mathematics , pathology
Objective To evaluate long‐term loading patterns using subchondral bone density (SBD) distribution of the tibial plateau after tibial plateau leveling osteotomy (TPLO) and tibial tuberosity advancement (TTA). Study Design Cross‐sectional study. Animals Adult (> 2 years), medium to large breed dogs (>20 kg) that had been treated with TPLO or TTA at least 1 year prior to the study were recruited. A normal cohort of similar age and weight dogs with normal physical and orthopedic examinations served as control. Methods Dogs were sedated for computed tomography (CT) of the stifle, and DICOM (digital imaging and communications in medicine) files were processed for CT osteoabsorptiometry (CTOAM). Tibial plateaus were sampled at 6 zones, and CTOAM was used to determine regional and maximal areas of SBD as a marker of joint loading. Results Data were collected on 48 stifles in 31 dogs (15 TPLO, 11 TTA, 22 control). Lower Hounsfield unit (HU) values were measured in the caudal and mid‐region of the lateral tibial plateau after TPLO and compared to normal. HU values did not differ between joints treated with TTA and those in the control group. Conclusion TPLO may alter stifle load distribution relative to the normal control group. There were no differences between TTA and the control group. Clinical significance/Impact Despite ongoing osteoarthritis (OA) in dogs after surgical intervention for cranial cruciate disease, changes in tibial SBD are minor and may not correlate with clinical function.