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 language | English (US) |
|---|---|
| Pages (from-to) | 454-459 |
| Number of pages | 6 |
| Journal | Veterinary Surgery |
| Volume | 39 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jun 1 2010 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Effect of Cranial Tibial Closing Wedge Angle on Tibial Subluxation
T2 - An Ex Vivo Study
AU - Apelt, Detlef
AU - Pozzi, Antonio
AU - Marcellin-Little, Denis J
AU - Kowaleski, Michael P.
PY - 2010/6/1
Y1 - 2010/6/1
N2 - 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.
AB - 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.
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U2 - 10.1111/j.1532-950X.2010.00670.x
DO - 10.1111/j.1532-950X.2010.00670.x
M3 - Article
VL - 39
SP - 454
EP - 459
JO - Veterinary Surgery
JF - Veterinary Surgery
SN - 0161-3499
IS - 4
ER -