The Centre of Rotation of Angulation (CORA) in deformity analysis is important because osteotomy performed at the CORA level:
- A Corrects both angulation and translation simultaneously without creating a new translational deformity ✓
- B Corrects angulation but creates a secondary translational deformity
- C Corrects only translation without affecting the angular deformity
- D Is contraindicated as the neurovascular bundle always passes through the CORA
Correct answer: A. Corrects both angulation and translation simultaneously without creating a new translational deformity
Explanation
The CORA is the apex of angulation deformity determined by the intersection of the axes of the proximal and distal bone segments. An osteotomy performed exactly at the CORA level with pure rotation around the CORA corrects the angular deformity without introducing any translational deformity, maintaining normal joint orientation. An osteotomy remote from the CORA requires both a rotation and a translation to achieve full correction, making planning more complex.
Reference: Maheshwari Essential Orthopaedics, 6th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.