In patients with varus knee alignment and concomitant cartilage lesions, the surgical decision-making becomes complex: should one perform a corrective osteotomy, a cartilage repair procedure, or both in combination? Keywords for SEO include varus knee osteotomy, cartilage repair combined with alignment correction, joint preservation in knee OA, and cartilage regeneration after osteotomy. This narrative review evaluates current literature on combining peri-articular knee osteotomies with cartilage regeneration procedures in varus knees — challenging the “osteotomy alone” vs “combined” paradigm.
Scope & methodology: literature search and evidence synthesis
The authors conducted a systematic search across OVID MEDLINE, EMBASE, and Cochrane databases (up to October 2022) for clinical studies reporting cartilage regeneration, radiologic or macroscopic cartilage outcomes in varus knees treated by isolated osteotomy or osteotomy combined with cartilage procedures. They analysed outcomes such as cartilage repair success, clinical PROMs, survival or re-intervention rates, and alignment corrections.
Key findings: combined treatment shows promise but evidence remains limited
- The review found favourable outcomes for combined knee osteotomy plus cartilage procedure in patients with substantial varus deformity and cartilage defects.
- Isolated high tibial osteotomy (HTO) alone may induce some cartilage regeneration in selected patients with varus and medial compartment cartilage lesions.
- Evidence suggests that when extra-articular varus deformity > 5° is present, combining osteotomy with cartilage procedure may be recommended rather than cartilage treatment alone.
- However, the authors highlight that high-quality comparative data (osteotomy alone vs combined) is scant and long-term results on cartilage regeneration remain inconclusive. The review calls for prospective, controlled studies.
Clinical implications & keywords for practice
- Surgeons treating varus knees with cartilage lesions should assess alignment correction need (degree of varus, mechanical axis deviation) in addition to cartilage status.
- Keywords: alignment correction in cartilage repair, osteotomy-augmented cartilage surgery, varus knee cartilage regeneration, alignment-cartilage interplay in knee OA.
- In cases with moderate to severe varus deformity, consider adding osteotomy to cartilage repair rather than performing cartilage surgery in isolation.
- The review suggests that cartilage regeneration outcomes may be optimised when osteotomy is used to normalise load distribution before or in conjunction with cartilage repair.
Take-home messages
- Combined knee osteotomy and cartilage procedure is a viable joint-preserving strategy in varus knees with chondral pathology and malalignment.
- While isolated osteotomy may suffice in milder cases, alignment correction > 5° likely warrants combined treatment.
- Current evidence is encouraging, but higher-level data is needed to define indications, timing, and technique interplay.
- The key principle remains: treat the “whole knee” — alignment + cartilage + soft tissues — rather than focusing on isolated pathology.
