Effect of Cranial Tibial Closing Wedge Angle on Tibial Subluxation

An Ex Vivo Study

Detlef Apelt, Antonio Pozzi, Denis J Marcellin-Little, Michael P. Kowaleski

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Objective: To evaluate the effect of cranial tibial wedge osteotomy (CTWO) angle on cranial tibial subluxation (CTS) and postoperative tibial plateau angle (TPA). Study Design: Ex vivo biomechanical study. Sample Population: Canine pelvic limbs (n=6). Methods: TPA determined from a lateral radiographic projection. CTS under 30% body weight load was measured from radiographs in the intact limb and after transection of the cranial cruciate ligament. A CTWO equal to TPA+10° was performed at the distal extent of the tibial crest, and was stabilized with a custom designed hinge plate and external skeletal fixator. TPA and CTS in the loaded limb was determined from radiographs at 4 CTWO angles: TPA-5°, TPA, TPA+5°, and TPA+7.5°. Comparison of CTS between the intact limb and the 4 CTWO angle groups was performed using 1-way repeated-measures ANOVA and a Dunnett multiple comparison test (significance at P<05). Results: CTS was significantly greater than that of the intact limb in the TPA-5° and TPA groups. CTS was not significantly different from the intact limb in the TPA+5° or TPA+7.5° groups with corresponding TPAs of 5.9° and 3.8°, respectively. Conclusion: Using this model, CTS was neutralized at a TPA of ∼4-6° with a CTWO angle between TPA+5° and TPA+7.5°. Clinical Relevance: A CTWO angle between TPA+5° and TPA+7.5° is necessary to neutralize CTS and achieve a postoperative TPA of 4-6° if the CTWO is performed at the distal extent of the tibial crest and the caudal cortices are aligned.

Original languageEnglish (US)
Pages (from-to)454-459
Number of pages6
JournalVeterinary Surgery
Volume39
Issue number4
DOIs
StatePublished - Jun 1 2010
Externally publishedYes

Fingerprint

Osteotomy
in vivo studies
plateaus
Extremities
limbs (animal)
External Fixators
Anterior Cruciate Ligament
Canidae
Analysis of Variance
Body Weight
cranial cruciate ligament
Population
osteotomy

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Effect of Cranial Tibial Closing Wedge Angle on Tibial Subluxation : An Ex Vivo Study. / Apelt, Detlef; Pozzi, Antonio; Marcellin-Little, Denis J; Kowaleski, Michael P.

In: Veterinary Surgery, Vol. 39, No. 4, 01.06.2010, p. 454-459.

Research output: Contribution to journalArticle

Apelt, Detlef ; Pozzi, Antonio ; Marcellin-Little, Denis J ; Kowaleski, Michael P. / Effect of Cranial Tibial Closing Wedge Angle on Tibial Subluxation : An Ex Vivo Study. In: Veterinary Surgery. 2010 ; Vol. 39, No. 4. pp. 454-459.
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