Thumb CMC Joint Replacement (TOUCH® Prosthesis)
By Dr Oscar Brumby‑Rendell – Adelaide Hand, Wrist & Upper Limb Surgeon Adelaide Shoulder & Upper Limb Clinic
Thumb base arthritis (CMC joint arthritis) is one of the most common causes of hand pain in Australia. As an Adelaide upper‑limb surgeon specialising in hand and wrist conditions, Dr Oscar Brumby‑Rendell treats many patients who struggle with pain, weakness and difficulty gripping due to this condition.
When non‑surgical options are no longer effective, CMC joint replacement with the TOUCH® prosthesis provides a modern, stable and highly functional solution — especially for patients wanting strong grip and excellent thumb mechanics.
What is CMC Arthritis?
CMC arthritis affects the small joint at the base of the thumb. Patients often present with:
- Pain at the thumb base
- Loss of thumb strength
- Difficulty with gripping and pinching
- Trouble opening jars, turning keys, lifting or typing
- Changes in thumb alignment or deformity
Non-surgical treatment options include splinting, hand therapy, activity modification and injections. When symptoms persist, surgery may be recommended.
What is the TOUCH® Prosthesis?
The TOUCH prosthesis is a dual‑mobility CMC joint replacement that recreates the natural biomechanics of the thumb. It provides stability, strength and smooth motion. As an Adelaide hand and wrist specialist, Dr Oscar Brumby‑Rendell offers this procedure for patients seeking faster recovery and higher functional performance.
Surgical Options
Dr Brumby‑Rendell offers two main surgical pathways in Adelaide for base‑of‑thumb arthritis:
1. Non-surgical treatment options include splinting, hand therapy, activity modification and injections. When symptoms persist, surgery may be recommended.
2. CMC Joint Replacement (TOUCH® Prosthesis):
A modern implant that restores thumb joint mechanics, preserves length, improves stability and provides superior strength.
Benefits of CMC Joint Replacement
Key advantages of CMC replacement with the TOUCH® prosthesis include:
- Stronger grip and pinch strength (superior to suspensionplasty)
- Faster recovery with no tendon harvesting
- Preservation of thumb length and alignment
- Natural and stable thumb mechanics
- Excellent function for active patients, including tradespeople, gym users and parents
CMC Replacement vs Suspensionplasty – Comparison
Both surgeries are excellent treatments for thumb arthritis. Dr Brumby‑Rendell will guide you on which is better suited to your anatomy, lifestyle and goals.
Comparison Table: CMC Replacement vs Suspensionplasty
| Grip Strength | Higher | Good |
| Pinch Strength | Higher | Moderate |
| Recovery Speed | Faster | Slower |
| Thumb Length | Preserved | Slightly reduced |
| Implant Risks | Small but present | None |
| Best For | Active, strength‑dependent patients | Low‑demand or multi‑joint arthritis |
Who Is Suitable for CMC Replacement?
You may be a good candidate if you have isolated CMC arthritis, ongoing pain despite conservative treatment, and want strong grip and pinch function. Suitability depends on imaging, anatomy and lifestyle demands.
Surgery & Recovery
TOUCH CMC replacement involves removing the worn joint surfaces and implanting the prosthesis. Early movement begins soon after surgery, and most patients see rapid improvements in pain, stability and function.
Risks & Considerations
CMC replacement carries small implant-related risks such as loosening or dislocation. Suspensionplasty avoids these risks but may offer lower grip strength and slower recovery.
Video showing excellent motion of thumb after Touch replacement
Left: Touch replacement
Right - Trapezectomy Suspensoplasty
Summary
CMC joint replacement with the TOUCH® prosthesis — performed by Dr Oscar Brumby‑Rendell in Adelaide — provides excellent pain relief, faster recovery and superior grip and pinch strength compared with suspensionplasty.
Frequently Asked Questions
Why Choose Dr Oscar Brumby-Rendell?
- Qualifications and Experience: Dr Oscar Brumby-Rendell is an Adelaide orthopaedic surgeon with extensive training and experience in treating upper limb conditions.
- Patient-Centred Approach: Dr Brumby-Rendell prioritises your needs with a compassionate, patient-centred approach, providing clear explanations and personalised treatment plans.
- Values: Driven by commitment, passion, and integrity, Dr Brumby-Rendell is dedicated to achieving the best outcomes and maintaining the highest standards of care.
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