Dr Ritwik Kejriwal, Knee and Shoulder Surgeon, New Plymouth, Taranaki

04/04/2026

At SOSC, we’re a big fan of osteotomy (realignment of leg) procedures. This procedure is typically performed when one half of the joint is worn out, with the goal to offload this half, delaying the need for a total knee replacement.

Our latest research, using data from the New Zealand Joint Registry, looked at what happens when patients eventually need a total knee replacement (TKA) after earlier procedures.

We compared patients undergoing TKA who previously had:
• An osteotomy (a procedure to realign the knee)
• A partial knee replacement (UKA)

What we found was important—especially for younger patients:
• Knee replacements done after a partial knee replacement were more than twice as likely to need revision surgery compared to those done after an osteotomy.

What does this mean?
For younger, active patients, the choice of initial treatment can have a big impact on future outcomes.

It’s another reminder that the “right” operation isn’t just about today—it’s about setting patients up for the best possible long-term result.

27/02/2026

At SOSC in New Plymouth, we’ve been examining national joint registry data to answer an important question:

Is a standard (anatomic) shoulder replacement safe and effective in patients with inflammatory arthritis?

Our research shows:
• It is just as safe as reverse shoulder replacement
• Revision rates are comparable
• Patients report better function — even 5–10 years after surgery

This challenges long-held assumptions. With modern implant advances, we’re now confidently offering anatomic shoulder replacement to more appropriately selected patients to achieve better outcomes, based on our research work.

Another great effort by Dr Brendon Newton.

12/02/2026

Thanks for the support TMF!

01/11/2025

Loving the “Cuff Augmentation” journey!

To improve outcomes after rotator cuff repair, we can now reinforce repairs with a biological ‘patch’ — designed to support healing when the tendon quality isn’t ideal.

The ongoing challenge is when to use this technique — it’s about finding the right balance between cost and benefit for each patient.

At Sports Orthopaedic Surgery Centre (SOSC), we’ve been exploring this from a functional outcome perspective. Interestingly, even patients with only partial healing often do very well if their shoulder mechanics are balanced, therefore post surgery MRI is often not useful.

Recently, my focus has shifted toward tendon retraction — especially in patients under 65 — as a key factor when considering augmentation.

It’s an exciting space to be in, and I’m grateful to work alongside colleagues who share the same curiosity and drive for better patient outcomes.

Well done, Dr Jonathan “Jono” Chan on your hard work with this project!

12/09/2025

Achieving knee extension is everything after ACL surgery!

08/09/2025

At Sports Orthopaedic Surgery Centre, we continually refine surgical techniques to improve outcomes for patients undergoing partial knee replacement.

A challenge has been addressing variations in component fit that can sometimes cause post-operative discomfort. By incorporating MRI scans into preoperative planning, our team has been able to achieve a more precise fit, enhancing comfort and recovery.

These insights have now been published and shared with the wider orthopaedic community. Congratulations to Brendon Newton for his important role in bringing this work to publication.

https://authors.elsevier.com/c/1liHx3S6VBJg36

10/08/2025

Love this work by our Norwegian colleagues. Double bundle ACL reconstruction has many advantages and the technique has a huge role to play in ACL repairs

23/07/2025

The next generation of surgeons continue to impress with their dedication to research. Dr Jonathan Chan and Dr Brendon Newton did a fantastic job presenting our SOSC research at the NZSES 2025 meeting last week in Queenstown, not an easy task with global experts in the room!

Jono presented his work on rotator cuff repair outcomes, aiming to clarify indications for augmentation.

Brendon shared his excellent analysis of our registry data, showing that anatomic shoulder replacement remains a safe option in patients with inflammatory arthritis.

29/06/2025

We are still figuring out how to reduce complications in knee replacement patients with BMI>45.

Great scientific work by my registrar Dr Jonathan Chan confirming that it is safe to use cementless implants.

Poster and presentation at ISAKOS 2025 in Munich to top it off. Looking forward to getting it published.

26/06/2025

Innovation is what keeps us going.

We have developed an MRI-based templating method for partial knee replacements that has made a difference to my practice. E-poster at the ISAKOS meeting in Munich this month, and a manuscript awaiting publication.

Thanks Brendon Newton for your hard work!

23/06/2025

Arthroscopic surgery training is slowly improving in NZ. We're proud to be part of the change.

For the past few years, we’ve been running Dry Lab Arthroscopy Course for the registrars in Taranaki, helping them get the hands-on skills and confidence they need. Still a way to go, but progress is happening. Thanks Greer for facilitating this.

23/07/2023

https://www.linkedin.com/feed/update/urn:li:activity:7086882686589431809/

Register for our next free Webinar, Posterior Knee Injuries – Current Concepts with Ritwik Kejriwal. In this webinar, Ritwik Kejriwal will cover management…