Thumb Joint Replacement: A Week-by-Week Recovery Guide

Recovery after a 1st CMCJ arthroplasty — replacement of the joint at the base of the thumb — follows a clear, protected pathway: two weeks in a lightweight forearm cast, then a further four weeks in a thumb splint at night for protection, with daytime movement and hand therapy through that window. Most patients are off all splinting by six weeks, driving by around six weeks and back to comfortable daily activities by three months. Pinch and grip strength continue to improve for up to a year.

In short: After 1st CMCJ arthroplasty (thumb joint replacement) you spend two weeks in a cast, then four weeks in a night splint for protection while you move the thumb by day under hand therapy guidance. Desk work usually returns in two to three weeks. Driving returns at around six weeks. Functional recovery sits at three to six months, with strength building for up to twelve.

This guide describes recovery specifically for 1st CMCJ arthroplasty using a modern dual-mobility implant. For a refresher on how this operation compares with the other surgical options for thumb-base arthritis, you can revisit my earlier guide to thumb arthritis surgery options.

What does recovery from a 1st CMCJ arthroplasty actually involve?

Recovery from 1st CMCJ arthroplasty has two overlapping jobs: protecting the new joint while the bone-implant interface settles and rebuilding pinch and grip through guided movement. The protection comes from the cast and night splint. The rebuilding comes from a structured course of hand therapy alongside graded use of the hand.

The thumb joint replacement is designed to allow earlier movement than the older soft-tissue operations, which is one of the reasons many patients now choose it. The trade-off is the importance of staged protection in the first six weeks — pushing too hard too early is the single most common reason for setbacks.

How does recovery progress week by week?

Day 0 — the day of surgery

1st CMCJ arthroplasty is a day-case operation. Anaesthetic is typically sedation & regional anaesthetic, or general anaesthetic. The thumb is supported in a lightweight plaster or fibreglass cast that crosses the wrist and immobilises the thumb. The regional block keeps the hand comfortable for the first 12 to 18 hours. Keep the hand elevated above heart level whenever possible. Simple oral analgesia is normally enough once the block wears off.

Week 1 — cast on, elevation, finger movement

The cast stays on, dry and intact. The fingers, elbow and shoulder are moved gently and often to keep them supple and reduce swelling. Avoid letting the hand hang down for long periods. No driving, no lifting and no getting the cast wet.

Week 2 — cast removal, splint fitting, movement begins

At the two-week clinic review the cast is removed, the wound is checked and the sutures are taken out. A hand therapist fits a custom thermoplastic thumb splint to be worn at night and during higher-risk activities. By day, you begin gentle range-of-movement exercises out of the splint — short, frequent sessions guided by the therapist.

Weeks 2–6 — night splint, daytime mobilisation

For these four weeks the splint protects the thumb at night and provides reassurance during the day. By day, the thumb is moved actively and used for light activities — holding a phone, buttering toast, turning a tap. No heavy lifting, no sustained pinching and no impact activities yet. The wound matures into a soft pink scar and most patients are off all painkillers by the end of this window.

Weeks 6–12 — splint off, strengthening

The night splint is discontinued at around six weeks once movement is comfortable and the thumb feels stable. Strengthening exercises begin in earnest: putty, resistance bands and graded pinch tasks under the hand therapist's direction. Most patients notice that the original arthritis pain has gone, although the operated thumb still feels weaker than the other side at this stage.

Months 3–6 — return to most activities

Strength and endurance continue to improve. Daily activities — cooking, shopping, gardening, gym work — return through this window. Some residual stiffness or aching after long use is common and settles steadily. Most patients are using the hand normally by the three-month mark, with confidence building over the months after.

Beyond six months — strength continues to build

Pinch and grip strength continue to improve for up to twelve months. The scar fades. By a year the thumb usually feels like part of the hand again rather than something you are managing.

The 1st CMCJ arthroplasty is supported by good medium-term evidence in well-selected patients. The protected six-week window described above is the most consistent finding across modern hand-surgery practice for this implant.

When can I drive after 1st CMCJ arthroplasty?

Most patients drive again at around six weeks after thumb joint replacement, once the night splint is no longer needed by day and pinch control of the wheel is reliable. The test is functional, not calendar-based: you must be able to hold the steering wheel firmly with both hands, perform an emergency stop comfortably and feel safely in control. The legal responsibility sits with the driver, not the surgeon: if you cannot safely control the car, you are not insured to drive it. If in any doubt, check with your insurer and try a short, supervised drive first.

How soon can I go back to work?

Return to work after 1st CMCJ arthroplasty ranges from two to twelve weeks depending on the job and which hand was operated on.

Desk-based work with the non-dominant hand operated on is usually possible from around the two-week mark, once the cast is off and the night splint is in place. Desk-based work with the dominant hand operated on typically takes two to three weeks, because typing and mouse work become tiring before they become painful.

Work involving repeated pinch, grip or lifting — trades, healthcare, hairdressing, cooking, childcare — takes longer. Most patients in these jobs return at six to eight weeks for lighter duties and twelve weeks for full duties. A graduated return-to-work plan agreed with your employer and occupational health makes the transition much smoother.

What does hand therapy after thumb joint replacement involve?

Hand therapy after 1st CMCJ arthroplasty is a structured course of around six to eight sessions over three months with a specialist hand therapist. Every patient who has thumb joint replacement with me is referred for formal hand therapy as part of the operation — it is the difference between a good surgical result and a strong functional result.

The first session, at around two weeks, focuses on splint fit, swelling control and the first gentle movements out of the cast. Middle sessions add scar management and graded pinch through the night-splint window. Later sessions cover strength, endurance and confidence — using the hand for the activities that matter to you, whether that is playing the piano, holding a tennis racquet or carrying a toddler.

When should I call the clinic during recovery?

Most recoveries are uneventful. Get in touch sooner rather than later if you notice the wound becoming increasingly red, hot or weeping after the first few days, fever or feeling generally unwell, calf pain or swelling, severe pain that is not settling with simple analgesia or new numbness or coldness in the thumb or fingers. These signs are uncommon but worth a quick phone call rather than a long wait.

My approach to follow-up

Every patient is seen at two weeks for cast removal, suture check and night-splint fitting, at six weeks to review movement and discontinue the night splint and at three months to assess strength and discharge from regular follow-up. Patients have my email and the clinic phone numbers between appointments — most queries are quick to answer and we would always rather hear from a patient who is unsure than have them wait and worry.

I work closely with a small group of senior hand therapists across Hertfordshire and London so that the rehabilitation pathway is consistent regardless of which hospital you have your surgery at — Spire Bushey, One Hatfield, Pinehill or St Albans City Hospital on the NHS.

Frequently asked questions

How long is the cast on after thumb joint replacement?
The cast stays on for two weeks after 1st CMCJ arthroplasty. It is removed at the two-week clinic review, when the sutures are taken out and a custom night splint is fitted.

How long is the night splint worn?
The night splint is worn for around four weeks after the cast comes off — usually weeks two to six after surgery. It protects the new joint while the hand is mobilising by day and is discontinued at the six-week review once movement is comfortable.

Is 1st CMCJ arthroplasty painful to recover from?
Pain is usually well controlled. The regional block keeps the hand comfortable overnight after surgery and most patients are off strong painkillers within five to seven days. The cast itself can feel cumbersome but is rarely painful. Pain at three weeks is unusual and worth a clinic call.

Can I drive at four weeks?
Usually not, because the night splint is still in place and pinch control of the wheel is not yet reliable. Most patients are back behind the wheel at around six weeks. The test is whether you can perform an emergency stop confidently and hold the wheel safely with both hands.

Will my thumb feel as strong as it was before?
Pinch strength typically returns to roughly the same level as the other side by six to twelve months, provided you complete the hand therapy programme. Grip strength returns more quickly. Many patients describe the operated thumb as more useful than it has been for years.

How long off work for a desk job?
Usually two to three weeks. Working from home with the night splint on is often possible from around the two-week mark, once the cast is off.

Will I need formal hand therapy or can I do exercises at home?
Formal hand therapy makes a real difference for 1st CMCJ arthroplasty and is included in every treatment plan. Home exercises matter too — the therapist will give you a written programme — but the early splinting and scar work need expert hands.

When can I go back to the gym?
Light lower-body and cardiovascular work can resume at around three weeks with the night splint still in place for protection. Upper-body resistance work returns from twelve weeks onwards, building gradually. I usually advise avoiding heavy pressing, pull-ups and racket sports until the three-month review.

Planning your recovery

If you are considering 1st CMCJ arthroplasty and want to talk through what the recovery would look like for your particular work, hobbies and home situation, I am happy to discuss it in clinic. You can book a consultation directly, or read more about Mr Schaller's training and credentials before getting in touch.

Reviewed and written by Mr Gavin Schaller
FRCS(Tr&Orth), MBBS, BSc(Hons), Dip. Hand Surg. (European)
Consultant Hand & Wrist Surgeon — The Schaller Hand & Wrist Clinic
More about Mr Schaller → · Read patient reviews →

This article is for general information only and does not replace individual medical advice. If you are concerned about a hand or wrist problem, please arrange a consultation with a qualified hand surgeon.