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Exposure Provided by the Gibson Versus the Kocher-Langenbeck Approaches With and Without Trochanteric Osteotomy: A Cadaveric Mapping Study.
Journal of Orthopaedic Trauma 2021 May 2
OBJECTIVE: To determine if prevalent approaches in acetabular fracture surgery provide enhanced anterior and cranial exposure in a cadaveric model.
METHODS: A Kocher-Langenbeck (K-L) approach (followed by a Gibson approach on the contralateral hip) was performed in the lateral position on 8 cadavers. A Steinmann pin was used to create holes outlining the bony surfaces available for instrumentation before and after a trochanteric osteotomy. All soft tissue was then removed from the pelvis, and a calibrated digital picture was taken. The surface area of the pelvis visualized through each approach was calculated and compared with the contralateral side to assess for a difference in exposure between the Gibson approach and the K-L approach. An increase in exposure of greater than 10% was considered significant. The extent of anterior exposure (with and without a trochanteric osteotomy) was then measured from the greater sciatic notch.
RESULTS: In 2 of 8 cadavers (25%), the Gibson approach yielded an increase in exposure when compared with a K-L approach. The addition of a trochanteric osteotomy yielded on average 1.6 cm (range, 0.7-2.6 cm) of increased anterior exposure in the K-L approaches and 1.5 cm (range 0.9-3.1 cm) in the Gibson approaches.
CONCLUSION: The Gibson approach did not reliably provide increased anterior exposure compared with a K-L approach in a cadaver model. A trochanteric osteotomy can be expected to add 1-2 cm of increased anterior exposure in both approaches.
METHODS: A Kocher-Langenbeck (K-L) approach (followed by a Gibson approach on the contralateral hip) was performed in the lateral position on 8 cadavers. A Steinmann pin was used to create holes outlining the bony surfaces available for instrumentation before and after a trochanteric osteotomy. All soft tissue was then removed from the pelvis, and a calibrated digital picture was taken. The surface area of the pelvis visualized through each approach was calculated and compared with the contralateral side to assess for a difference in exposure between the Gibson approach and the K-L approach. An increase in exposure of greater than 10% was considered significant. The extent of anterior exposure (with and without a trochanteric osteotomy) was then measured from the greater sciatic notch.
RESULTS: In 2 of 8 cadavers (25%), the Gibson approach yielded an increase in exposure when compared with a K-L approach. The addition of a trochanteric osteotomy yielded on average 1.6 cm (range, 0.7-2.6 cm) of increased anterior exposure in the K-L approaches and 1.5 cm (range 0.9-3.1 cm) in the Gibson approaches.
CONCLUSION: The Gibson approach did not reliably provide increased anterior exposure compared with a K-L approach in a cadaver model. A trochanteric osteotomy can be expected to add 1-2 cm of increased anterior exposure in both approaches.
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