# An in silico comparison of a novel CORA‐based cranial closing wedge ostectomy methodology with three other techniques

## TL;DR

This study introduces a new cranial closing wedge ostectomy method that achieves a more accurate and consistent postoperative tibial angle in dogs compared to existing techniques.

## Contribution

The novel CORA-based CCWOCORA method offers predictable and precise postoperative tibial plateau angles in veterinary orthopedic surgery.

## Key findings

- The CCWOCORA method achieved a consistent median postoperative tibial plateau angle of 5.00° across different tibial morphologies.
- The CCWOCORA method showed significantly less variability in postoperative angles compared to other techniques.
- The CCWOCORA method's geometric principles ensure predictable outcomes in tibial plateau angle adjustments.

## Abstract

To describe a CORA‐based cranial closing wedge ostectomy methodology (CCWOCORA) and to determine whether the CCWOCORA achieves a more accurate and precise postoperative tibial plateau angle (TPAPOST) than three previously described methods.

In silico study.

Thirteen client‐owned dogs.

Computed tomography (CT) scans of six Labrador retriever, six German shepherd, six Rottweiler, and six small‐breed dog (<10 kg) tibiae, originally acquired for unrelated purposes, were used for in silico planning and execution of the CCWOCORA and previously described procedures. The TPAPOST, tibial long axis shift, change in tibial length and wedge angle were recorded and a linear mixed‐effects model was used to compare differences amongst techniques.

The median TPAPOST for the CCWOCORA method was 5.00° (range: 5.00–5.00°) across a variety of tibial morphologies, whereas all other methods showed greater variability. Differences in TPAPOST were evident amongst methods (p < .001) and breeds (p < .001).

In silico, CCWOCORA methodology always achieved the target TPAPOST due to its intrinsic geometric principles. As such, CCWOCORA surgeries achieved a more accurate TPAPOST than previously described CCWO techniques.

The CCWOCORA provides clinicians with a cranial closing‐wedge ostectomy methodology with entirely predictable TPAPOST.