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Comparison of Tibial PA , Bone Healing, and Intra‐articular Screw Placement using Conventional Nonlocked Application of Surgeon‐Contoured versus Locked Application of Precontoured TPLO Plates in Dogs
Author(s) -
Krotscheck Ursula,
Thompson Margret S.,
Ryan Kerry K.,
Mohammed Hussni O.
Publication year - 2012
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/j.1532-950x.2012.01053.x
Subject(s) - medicine , cruciate ligament , radiography , stifle joint , osteotomy , surgery , anterior cruciate ligament , nuclear medicine , orthodontics
Objective To determine the influence of conventional nonlocked application of surgeon‐contoured ( NL ‐ SX c) and locked‐hybrid application of precontoured ( L ‐ P c)‐ TPLO plates on the tibial plateau angle ( TPA ) immediately postoperatively and longterm after tibial plateau leveling osteotomy ( TPLO ) in dogs as well as to evaluate their influence on the incidence of intra‐articular screw placement and bone healing. Study Design Retrospective, cross‐sectional, clinical study. Animals Dogs (n = 101) with cruciate ligament insufficiency that had TPLO . Methods Collected data included signalment, plate size/type, preoperative (Pre TPA ), postoperative (Post TPA ), and recheck TPA (Re TPA ). Tibial plateau rotation achieved during surgery ( R ota TPA = Pre TPA ‐Post TPA ) and TPA shift during healing (Shift TPA = Re TPA ‐Post TPA ) were calculated. Radiographic evidence of stability and time to radiographic recheck were recorded. Variables were compared by plate type using a 2‐sample t ‐test or χ 2 as appropriate (significance at P < .05). Results Median time to radiographic follow‐up was 75 days (range, 43–2815 days). The remaining data are reported as means. Forty‐two stifles had NL ‐ SX c, 59 stifles had L ‐ P c. Pre TPA of NL ‐ SX c and L ‐ P c was 28.3° and 29.1°, respectively ( P = .22). Post TPA (13.2° and 7.9°), Rota TPA (15.0° and 21.2°) and Re TPA (14.9° and 10.3°) for NL ‐ SX c and L ‐ P c, respectively, were all significantly different ( P < .0001). Shift TPA for these constructs (1.7° and 2.4°, respectively) was not significantly different ( P = .25), and 92.1% of dogs were considered to have radiographically stable osteotomies at last recheck. Conclusions A higher degree of tibial plateau rotation was achieved and maintained in osteotomies with L ‐ P c. There was no significant difference in Shift TPA or radiographic osteotomy stability between constructs.