Artificial Disc Replacement Explained for Patients in Canada
Artificial disc replacement is an operation that removes a damaged disc from the neck or lower back and replaces it with a mechanical implant designed to keep the spine moving. It is the main alternative to spinal fusion, which stops movement at the treated level by joining two vertebrae together. The procedure is also called total disc replacement (TDR) or disc arthroplasty, and some North American medical sources spell it artificial disk replacement.
This guide explains how the operation works, who tends to benefit, what recovery involves and where the evidence stands. It also covers the practical side for Canadians: how provincial coverage works, current wait times and what to weigh before seeking treatment abroad. The content has been reviewed by Prof. Dr. Rudolf Bertagnoli, an orthopaedic spine surgeon who has performed and researched disc replacement for more than two decades.
Contents
- What Is Artificial Disc Replacement
- Conditions Disc Replacement Can Treat
- Who Is a Good Candidate for Disc Replacement
- How Suitability Is Assessed
- Artificial Disc Replacement Compared With Spinal Fusion
- What Happens During Surgery
- Recovery After Artificial Disc Replacement
- Safety and Risks
- Results After Disc Replacement
- Multi-Level, Hybrid and Revision Surgery
- Artificial Disc Replacement in Canada
- About Prof. Dr. Rudolf Bertagnoli
- Frequently Asked Questions
- Request a Free Case Evaluation
Disc Replacement at a Glance
| Question | Short answer |
|---|---|
| What does it treat? | Nerve symptoms caused by a damaged disc in the neck, and pain arising from a damaged disc in the lower back |
| Main benefit | Relieves symptoms while keeping natural movement at the treated level |
| Main alternative | Spinal fusion |
| Operation time | Usually two hours or less for a single lumbar level in Prof. Dr. Bertagnoli's practice |
| Hospital stay | A few days; around five days is common after neck surgery in Prof. Dr. Bertagnoli's practice |
| First steps after surgery | Most patients stand and walk on the first day |
| Return to desk work | Often one to two weeks after neck surgery and a few weeks after lower back surgery |
| Funding for Canadians | Treatment abroad is usually private; provincial plans fund it only with prior approval |
What Is Artificial Disc Replacement
The spine has 23 discs sitting between its vertebrae. Each one has a tough outer ring and a softer, gel-like centre. Together they absorb load and let the spine bend and twist. With age, injury or wear, a disc can lose height, bulge, tear or herniate. In some people the damage presses on a nerve or on the spinal cord. In others, the disc itself becomes the source of pain.
During artificial disc replacement, the surgeon removes the damaged disc, frees any trapped nerves and fits an implant into the space. Most implants have two metal endplates that anchor into the vertebrae above and below, with a core between them. The aim is to restore the height of the disc space, take pressure off the nerves and keep movement at that level.
Cervical and Lumbar Disc Replacement
Cervical disc replacement treats discs in the neck through an incision at the front of the neck. Lumbar disc replacement treats discs in the lower back through the abdomen, so the back muscles are not cut. The two operations share a principle but differ in who qualifies, how the surgery is done and how recovery unfolds. A patient who suits one region may not suit the other.
Conditions Disc Replacement Can Treat
In the neck, the usual reason for surgery is nerve-related symptoms caused by a damaged disc. These include radiculopathy, where a compressed nerve root causes arm pain, numbness, tingling or weakness, and myelopathy, where pressure on the spinal cord affects balance, hand dexterity or walking. Neck pain on its own only rarely justifies an operation.
Advanced degenerative disc disease (DDD) with significant symptoms is present in almost all patients who have disc replacement. Common symptoms include discogenic pain, radiculopathy (pain or numbness in the limbs) and posterior pain. Each patient's symptoms are matched to imaging, such as X-rays, MRI and CT scans, before a surgical plan is finalised. In rare cervical cases, compression of the spinal cord with swelling (oedema) calls for surgery even when the patient has few or no symptoms.
In most cases, disc replacement is considered only when symptoms persist despite a fair trial of non-surgical care such as physiotherapy, medication and changes to activity.
Who Is a Good Candidate for Disc Replacement
There is no single universal checklist, and each implant has its own approved indications. In general, the people who do well share several features.
- Symptoms that can be traced to one or more specific damaged discs
- Symptoms that have not improved after an appropriate course of non-surgical treatment
- A stable and reasonably aligned spine at the affected level
- Bone strong enough to hold an implant securely
- General health that allows a safe anaesthetic and recovery
Not every patient needs to meet every point. Prof. Dr. Bertagnoli uses additional techniques that allow many people outside these limits to keep movement in their spine, as the next section explains.
Findings That Need Special Planning
Some findings rule out a standard disc replacement on its own. In Prof. Dr. Bertagnoli's practice, several of them can often be addressed:
- A spine that is not aligned. 360 motion preservation, which includes artificial discs, allows Prof. Dr. Bertagnoli to treat a misaligned spine while keeping movement.
- Severe arthritis of the facet joints. Posterior decompression and facet remodelling can overcome this restriction.
- Osteoporosis or other causes of weak bone. Bone can be strengthened with AMP vertebroplasty.
- Degenerative scoliosis. Here too, bone can be strengthened with AMP vertebroplasty.
Other findings usually point towards fusion or another treatment, and each case is assessed individually:
- Active infection in the spine or elsewhere in the body, which must be cleared before any implant surgery
- Significant instability, such as one vertebra slipping forward on the one below
- Major deformity other than degenerative scoliosis
- Certain fractures, tumours or structural problems
Age alone does not settle the question. Prof. Dr. Bertagnoli's view is that the condition of the spine and the patient's general health carry more weight than a birth date, so bone quality is measured directly rather than assumed. His prospective study of lumbar disc replacement in patients older than 60 supports careful use in selected older patients. Previous spinal surgery does not automatically rule a patient out either, although it can make access to the spine more difficult. More detail is available on who is a candidate for ADR and who is not a candidate.
How Suitability Is Assessed
In Prof. Dr. Bertagnoli's practice, candidacy is never decided by an MRI alone. Many people have disc changes on a scan that cause no symptoms at all, and two people with similar images can need very different treatment. The assessment asks whether the symptoms, the examination and the imaging all point to the same level and the same problem. When they agree, treatment can be aimed precisely at the source. When they do not, further investigation comes first.
A thorough assessment usually includes:
- A detailed history of the symptoms, previous treatment and their effect on daily life
- A physical and neurological examination of strength, sensation and reflexes
- An MRI scan of the discs, nerves and spinal cord
- Upright X-rays, including flexion and extension views taken while bending forwards and backwards, which reveal instability that a static scan can miss
- A CT scan when more bone detail is needed, or when metal in the spine rules out a clear MRI
- A bone density test before any implant is planned
- Nerve studies (EMG and nerve conduction) in some cases
Most of these tests can be arranged close to home before an evaluation. Flexion and extension views are not always part of a routine spine X-ray request, so it is worth asking for them by name. The full process is described on how patients are evaluated.
Artificial Disc Replacement Compared With Spinal Fusion
Fusion remains the most common operation for disc problems and is the right choice for many patients. For people who suit both, Prof. Dr. Bertagnoli's view, formed over more than two decades of research and surgery, is that disc replacement is the superior operation because it keeps the spine moving. The table shows how the two compare.
| Topic | Disc replacement | Spinal fusion |
|---|---|---|
| Main goal | Relieve symptoms while keeping movement at the treated level | Relieve symptoms by stopping movement at the treated level |
| How it works | An implant replaces the disc and acts as a mobile joint | Bone graft and hardware join two vertebrae into one solid unit |
| Bone healing | The implant must bond to the vertebrae, but no fusion is needed | Recovery depends on the bone fusing, which takes months and does not always happen (non-union) |
| Neighbouring discs | Designed to reduce extra stress on the levels above and below | Can increase load on neighbouring levels, which may contribute to adjacent segment degeneration |
| Best suited to | Active patients who want to maintain their activities | Significant instability, major deformity and some revision cases |
| Availability for Canadians | Limited in Canada, particularly for lumbar and multi-level surgery | Widely available |
Prof. Dr. Bertagnoli discusses the evidence in more depth on disc replacement and fusion over the long term.
What Happens During Surgery
Lumbar Disc Replacement Surgery
The operation is performed under general anaesthetic with the patient lying on their back. The spine is reached from the front through an incision in the abdomen. The surgeon moves the peritoneum and its contents aside to expose the disc. The damaged disc is removed, the nerves are freed, the disc space is prepared and the implant is fitted under X-ray guidance. In Prof. Dr. Bertagnoli's hands, a single level usually takes two hours or less.
Cervical Disc Replacement Surgery
Neck surgery is also performed under general anaesthetic, through an incision at the front of the neck that is often placed in a natural skin crease. The windpipe and oesophagus are moved to one side, the disc and any bone spurs pressing on the nerves or spinal cord are removed, and the implant is fitted. Prof. Dr. Bertagnoli's patients commonly stay in hospital for around five days.
Choosing the Right Implant
Implants differ in size, shape, materials and the kind of movement they allow. Matching the device to the patient's anatomy and diagnosis matters as much as the operation itself. Prof. Dr. Bertagnoli works with several implant designs and generally prefers the Prodisc line, which is FDA-approved and among the most extensively researched and tested. Having a choice of devices means the implant is chosen for the patient rather than the patient for the implant. The options are described on the artificial disc replacement models page.
Recovery After Artificial Disc Replacement
Recovery is usually quicker than after fusion because there is no wait for bone to fuse, and most patients are on their feet the day after surgery. Healing then continues in stages.
| Stage | What usually happens |
|---|---|
| Day of surgery and day one | Close monitoring after the anaesthetic. Most patients stand and walk with help on the first day. |
| First few days | Pain is managed with medication. After neck surgery a sore throat or some difficulty swallowing is common and settles within days. A flexible collar or soft corset may be used to limit extreme movement while tissues heal. |
| Weeks one to six | Daily walking is encouraged. Heavy lifting, bending under load and jarring activity are avoided. Desk work and driving often resume within one to two weeks after neck surgery and within a few weeks after lower back surgery. |
| Weeks six to twelve | Physiotherapy builds strength and flexibility. Physically demanding work is usually considered from six to twelve weeks after neck surgery and later after lower back surgery. |
| Three months onwards | Most of the improvement in pain and function happens over weeks to months. Follow-up X-rays check the position of the implant. |
Some patients notice a deep muscular ache in the months after surgery as the spine adjusts to the restored disc height. In Prof. Dr. Bertagnoli's experience this usually settles, although in a small minority it can last up to a year or longer. Gentle stretching, warmth and muscle relaxants can help. Smoking slows healing, so stopping well before surgery gives the best start to recovery. Read more about recovery after artificial disc replacement.
Safety and Risks
Disc replacement is a well-established operation, and serious complications are uncommon in experienced hands. Like all spinal surgery it carries some risk, and a good surgeon discusses it openly before any decision is made. The main risks are:
- General surgical risks such as infection, bleeding, blood clots in the legs or lungs, and reactions to the anaesthetic
- Injury to a nerve or the spinal cord, which is very rare but serious
- Injury to blood vessels or abdominal organs during lumbar surgery, one reason an access surgeon is often involved. No cases have been reported among Prof. Dr. Bertagnoli's patients to date.
- In men having surgery at the lowest lumbar levels, a small risk of retrograde ejaculation caused by injury to nearby nerves. No cases have been reported among Prof. Dr. Bertagnoli's patients to date.
- Temporary hoarseness or difficulty swallowing after neck surgery
- Implant problems, including movement out of position, sinking into the bone, wear or loosening
- New bone forming around the implant (heterotopic ossification), which can reduce or stop movement at that level
- Pain that persists or returns, and the possibility of further surgery
Most patients see a clear improvement in pain, although some discomfort can remain, so it helps to set realistic expectations before surgery. Complication rates vary between surgeons, which makes experience with this specific procedure one of the most important factors in choosing who operates.
When to seek urgent care. New problems controlling the bladder or bowel, numbness in the groin or inner thighs, or rapidly worsening leg weakness can signal serious nerve compression. Anyone with these symptoms, before or after surgery, should seek emergency care immediately.
Results After Disc Replacement
Results vary widely with the surgeon's experience and with careful patient selection, so it is worth asking any surgeon about their own outcomes.
Prof. Dr. Bertagnoli has contributed to the published evidence on disc replacement. His prospective studies of the ProDisc implant, published in Spine and the Journal of Neurosurgery: Spine, reported outcomes after single-level and multi-level lumbar disc replacement, in patients older than 60, and after cervical disc replacement. His full list is on the publications page.
Many of his patients have also shared their own long-term results, from 17 years after surgery to a trek to Everest Base Camp four years on. More are collected under long-term patient experiences after ADR.
Multi-Level, Hybrid and Revision Surgery
Disc damage often affects more than one level. Disc replacement can be performed at two or more levels. It can also be combined with fusion at a level that is unsuitable for an implant, known as a hybrid procedure, or used in some patients who have already had spinal surgery. These cases need more detailed planning and specialist experience, and relatively few surgeons offer them.
Prof. Dr. Bertagnoli has performed disc replacement at up to five levels in the cervical and lumbar spine, and his practice regularly assesses patients who have been told they need a multi-level fusion. Whether a multi-level disc replacement is appropriate depends on the individual spine. See multi-level ADR and previous surgery.
Artificial Disc Replacement in Canada
How Provincial Coverage Works
Canada's health care system is funded through taxes and run by each province and territory. Under the Canada Health Act, provincial plans cover medically necessary hospital and physician services, and each province decides which services meet that definition.
Access to disc replacement varies by province and is more limited for lumbar, multi-level, hybrid and revision procedures. Being told that disc replacement is not available locally is not the same as being unsuitable for it. A free online evaluation by Prof. Dr. Bertagnoli can show whether motion preservation is still an option.
Wait Times for Spine Surgery
Wait times shape many patients' decisions. The Fraser Institute's 2025 survey of specialists found a median wait of 28.6 weeks from a family doctor's referral to treatment across all specialties. Provincial medians ranged from 19.2 weeks in Ontario to 60.9 weeks in New Brunswick. Neurosurgery (49.9 weeks) and orthopaedic surgery (48.6 weeks) were among the longest. Statistics Canada reported that 36 per cent of adults who saw a specialist in 2024 waited three months or more for their first consultation.
These are system-wide figures rather than waits for disc replacement specifically, but they explain why many Canadians start exploring their options, including treatment abroad, while still in the referral queue.
Funding for Treatment Outside Canada
Provincial plans fund elective surgery abroad only in limited circumstances. Ontario is a typical example. OHIP considers out-of-country treatment only with written prior approval from the Ministry of Health, applied for by an Ontario physician with confirmation from a specialist. The treatment must be accepted as appropriate in Ontario and either unavailable there or delayed to a point that would risk death or medically significant irreversible tissue damage. Without prior approval the patient pays all costs, and travel, accommodation and meals are not covered.
Other provinces and territories set their own rules, so it is worth checking with the provincial plan and any private or workplace insurer before committing to dates. Prof. Dr. Bertagnoli's team provides detailed invoices and medical reports to support insurance claims.
What to Look For in a Disc Replacement Surgeon
Choosing the surgeon matters as much as choosing the operation. As in any field, experience counts. A surgeon refines their technique over many procedures and learns to manage a wide range of patient profiles, and techniques, devices and training differ from one surgeon to the next. It pays to choose carefully. Points worth looking for include:
- Disc replacement as a core part of the surgeon's practice rather than an occasional procedure
- Experience with the levels involved, including multi-level and hybrid surgery
- A choice of implants, so the device suits the patient
- A diagnosis that matches the symptoms, examination and imaging
- Clear, realistic expectations for pain relief and function
- A plan for follow-up after surgery
Prof. Dr. Bertagnoli has performed more than 10,000 disc replacements, including multi-level, hybrid and revision cases, and has taught his techniques to more than 3,000 surgeons worldwide.
Experiences of Canadian Patients
Several Canadians have shared their experience of treatment with Prof. Dr. Bertagnoli, including a patient from Toronto, a patient from Alberta and a Canadian doctor who had three-level cervical disc replacement. Individual stories are not a guide to outcomes, but they show what the process looks like in practice. More are collected on the patient reviews page.
About Prof. Dr. Rudolf Bertagnoli
Prof. Dr. Rudolf Bertagnoli is an orthopaedic spine surgeon who has specialised in motion-preserving spine surgery for more than two decades. He studied medicine at the University of Vienna and was Assistant Professor and Chief of the Spinal Department at the Orthopaedic University Hospital in Göttingen from 1989 to 1994. From 1994 he headed the spine centre at St. Elisabeth Clinic in Straubing and Bogen, and since 2005 he has led Pro Spine, the European Center for Spine Arthroplasty and Associated Non Fusion Technologies.
He was a founding member and the 2004 to 2005 president of the Spine Arthroplasty Society, now the International Society for the Advancement of Spine Surgery (ISASS). He has published prospective outcome studies of disc replacement in peer reviewed journals and holds 36 patents and co-patents for spinal devices. He is also one of the editors of the textbook Motion Preservation Surgery of the Spine. He has performed more than 10,000 disc replacement procedures, and he has taught surgical techniques to more than 3,000 surgeons from over 55 countries. His full background is on the CV page.
Frequently Asked Questions
Is artificial disc replacement available in Canada?
Yes, but it remains relatively uncommon. It is offered in a limited number of Canadian centres, mainly for single-level neck surgery, while lumbar, multi-level and complex procedures are offered far less widely. This is why some Canadians seek treatment abroad with surgeons who specialise in motion preservation.
Does OHIP or another provincial plan cover artificial disc replacement?
Surgery outside Canada is covered only with written prior approval, which is granted in limited circumstances. In Ontario, an Ontario physician must apply to the Ministry of Health before treatment takes place.
Is artificial disc replacement better than spinal fusion?
For the right patient, yes. Disc replacement is now widely accepted as an alternative to fusion, and Prof. Dr. Bertagnoli regards it as the superior operation for suitable patients. It preserves movement, avoids waiting for bone to fuse and, in carefully selected patients, performs at least as well as fusion in clinical studies. Fusion remains the better choice in some cases, such as significant instability or major deformity.
How long is recovery after disc replacement surgery?
Most patients walk on the first day. After neck surgery, desk work and driving often resume within one to two weeks and heavier work from six to twelve weeks. Recovery after lower back surgery takes a little longer, with most of the improvement over the first few months.
How long does an artificial disc last?
There is no fixed lifespan. Studies have followed patients for ten years and more with lasting benefit in well-selected cases, and some of Prof. Dr. Bertagnoli's patients have shared their experience 17 years after surgery. How long an implant lasts depends on the device, its position, bone quality and activity levels.
How soon can a patient fly home to Canada after surgery in Germany?
Patients usually stay in Germany for five to seven days after leaving hospital, making a total stay of around two weeks. The exact timing depends on recovery and is confirmed by the surgical team before departure.
Request a Free Case Evaluation
If you have been told you need a spinal fusion, or you want to know whether disc replacement could work for you, Prof. Dr. Bertagnoli can review your history and imaging and send you a written opinion. The online evaluation is free.
Request a Free Case Evaluation Contact the Team
This page provides general information and does not replace individual advice from a qualified doctor. Results vary between patients, and patient stories describe individual experiences.
References
- American Academy of Orthopaedic Surgeons. Artificial Disk Replacement in the Lumbar Spine. OrthoInfo.
- American Academy of Orthopaedic Surgeons. Cervical Disk Replacement. OrthoInfo. Updated March 2025.
- Johns Hopkins Medicine. Lumbar Disk Replacement.
- Health Canada. Canada's health care system.
- Fraser Institute. Waiting Your Turn: Wait Times for Health Care in Canada, 2025 Report.
- Statistics Canada. Wait times to see a medical specialist in Canada, 2024. The Daily, 29 July 2025.
- Government of Ontario. OHIP coverage while outside Canada.
- Bertagnoli R, Yue J, Shah RV, et al. The treatment of disabling single-level lumbar discogenic low back pain with total disc arthroplasty utilizing the ProDisc prosthesis: a prospective study with 2-year minimum follow-up. Spine. 2005;30(19):2230-6.
- Bertagnoli R, Yue J, Shah RV, et al. The treatment of disabling multilevel lumbar discogenic low back pain with total disc arthroplasty utilizing the ProDisc prosthesis: a prospective study with 2-year minimum follow-up. Spine. 2005;30(19):2192-9.
- Bertagnoli R, Yue J, Nanieva R, et al. Lumbar total disc arthroplasty in patients older than 60 years of age: a prospective study of the ProDisc prosthesis with 2-year minimum follow-up period. J Neurosurg Spine. 2006;4:85-90.
- Bertagnoli R, Yue J, Pfeiffer F, et al. Early results after ProDisc-C cervical disc replacement. J Neurosurg Spine. 2005;2:403-410.
