Bone Grafting: Types, Procedure, Risks and Recovery
Updated: 6 days ago
Written and medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026 · How we review
Quick Answer
Bone grafting is surgery that places bone tissue, or a bone-like material, into a gap or weak spot in a bone to support it and trigger new bone growth. It treats fractures that heal slowly or not at all, bone disease and infection, and helps with spinal fusion, joint replacement and dental implants. Healing takes weeks to a year. [1]
What the research says
Smoking roughly doubles the risk of bone that won't heal. A review of 40 studies covering 7,516 procedures found smokers had 2.2 times the risk of delayed healing or non-healing after fractures, spinal fusion and similar bone surgery. When bone did heal, it took about 28 days longer. (Pearson et al., BMJ Open, 2016) [2]
Your own bone isn't always better, and taking it has a cost. In 2,389 teens having spinal fusion for scoliosis, fusion rates were the same with hip-bone grafts, donor bone, or bone substitutes. But harvesting hip bone meant more blood loss (1,018 vs 861 mL), longer surgery, and more pain problems (26% vs 9%). (Kirzner et al., ANZ Journal of Surgery, 2018) [3]
In neck fusion surgery, your own bone fused more reliably. Across 17 studies of anterior cervical fusion, failed fusion happened in 0.9% of patients with their own bone versus 4.8% with donor bone. (Shriver et al., The Spine Journal, 2015) [4]
Key takeaways
A bone graft fills gaps in weak, broken or missing bone and helps new bone grow.
Your surgeon picks the graft type based on your health history and why you need it.
Healing time depends on graft size, location, your age and overall health.
Most bone grafts heal without complications.
Quitting smoking and tobacco is one of the best ways to improve healing.
What is bone grafting?
Bone grafting is a surgical procedure that boosts your body's natural bone-making process by supporting weak bone and stimulating new bone to grow. [1]
It works in two ways:
Support: Graft material is placed into gaps in weak, broken or deficient bone.
Growth: The graft stimulates new tissue to grow, bridging the gap and restoring bone strength.
Over time, the graft fuses with the bone around it and becomes part of your skeleton.
To understand how bone rebuilds itself, see our guide to osteoblasts and osteoclasts, the cells that build and remodel bone.
Who needs a bone graft?
The most common reason for a bone graft is a broken bone that doesn't heal correctly, though bone disease, infection, spinal fusion and dental implants are other common reasons. [1]
There are three main healing problems:
Healing problem | What it means |
|---|---|
Delayed union | The bone heals more slowly than expected |
Malunion | The bone heals in an abnormal position |
Nonunion | The bone doesn't heal (fuse) at all |
Other reasons you might need a bone graft include:
Bone disease, such as osteonecrosis or bone cancer
Bone infection (osteomyelitis)
Birth differences, such as uneven limb lengths or an unusually small chin
Dental bone graft to strengthen the jaw before a tooth implant
Joint replacement, where new bone growth helps hold an artificial joint in place
Spinal fusion, which joins two spine bones to treat chronic pain
Severe trauma, including fractures that shatter bone, like a comminuted fracture
What are the types of bone grafts?
The four main types of bone grafts are autograft (your own bone), allograft (donor bone), bone marrow aspirate and synthetic grafts, and each uses a different source of graft material. [1]
Autograft (your own bone)
An autograft uses bone taken from your own body. It most often comes from the top of the hip bone, called the iliac crest.
Your own tissue gives the best chance of successful fusion. The downsides: only a limited amount can be taken, and you may have pain where the bone was removed. [4]
Allograft (donor bone)
An allograft uses bone tissue from another person (a donor). Strict public health rules control how this tissue is handled. It is cleaned and sterilized to keep you safe.
Allografts are common in spinal fusion. They act as a framework that healthy new bone grows around.
Bone marrow aspirate
Marrow is the spongy tissue inside bones. It contains stem cells and progenitor cells that help fractures heal.
The surgeon uses a needle to draw marrow from the hip bone. It can be used alone or mixed with other grafts, often allografts, to boost healing.
Synthetic bone graft
Synthetic grafts are made in a lab from a variety of porous materials. Some also contain proteins that support bone growth.
How do the bone graft types compare?
Type | Graft source | Main advantage | Main limitation |
|---|---|---|---|
Autograft | Your own bone, usually the hip | Highest chance of fusion; contains live bone-growing cells | Limited supply; pain at the harvest site |
Allograft | Sterilized donor bone | No second surgery to harvest bone | Relies on your body to grow into the framework |
Bone marrow aspirate | Marrow drawn from your hip | Rich in healing stem cells | Usually combined with other grafts |
Synthetic | Lab-made porous material | Unlimited supply for large defects | Depends on the material used |
What happens during bone graft surgery?
During bone graft surgery, you receive anesthesia, the surgeon reaches and cleans the bone, places and secures the graft, and closes the incision with stitches. [1]
Here's what to expect, step by step:
Anesthesia. You receive medicine that puts you to sleep and temporarily blocks sensation. If you've ever had a reaction to anesthesia, tell your team; read about malignant hyperthermia to learn why.
Incision. The surgeon cuts through the skin to reach the bone.
Bone preparation. The bone is cleaned, and any diseased tissue is removed.
Graft placement. The graft is applied and secured. This may involve hardware such as plates or screws.
Closing. Stitches close the incision.
What are the benefits of bone grafting?
The benefits of bone grafting depend on the graft type, from no risk of disease transmission with your own bone to an unlimited supply with synthetic grafts. [1]
Graft type | Key benefits |
|---|---|
Autograft | No risk of disease transmission · Low chance of infection · Contains bone-growing cells, which improves healing |
Allograft | No extra procedure to harvest bone · Low risk of disease spread because the tissue is sanitized · Doesn't take tissue from your other bones |
Synthetic | Sterile and germ-free · Available in unlimited amounts to repair large sections of bone · Many options for different medical needs |
What are the risks of bone grafting?
Like all surgery, bone grafting carries risks such as blood loss, infection, healing problems, chronic pain, new fractures, hardware failure and scarring. [1]
Blood loss
Infection
Problems with bone healing
Chronic pain
New fractures
Hardware failure (plates or screws stop holding the graft in place)
Scarring
In rare cases, recovery doesn't go as planned. Possible issues include graft rejection, infection and nerve damage.
How long does bone graft recovery take?
Bone graft recovery takes anywhere from several weeks to a year as the graft slowly grows into, or fuses with, the nearby bone. [1]
How long your recovery takes depends on:
Factor | Why it matters |
|---|---|
Graft size | The size of the graft affects how long fusion takes |
Graft location | Where the graft is placed affects healing time |
Your age | Age influences how quickly bone repairs |
Overall health | Your general health affects how well bone repairs |
How can you lower your risk of complications?
Quitting smoking and all tobacco products is one of the best ways to lower your risk of complications, because tobacco limits your body's ability to heal. [2]
If you need help quitting, Smokefree.gov offers free tools and support.
When should you call your doctor after a bone graft?
You should contact your healthcare provider after a bone graft if you notice bleeding or drainage near the incision, fever, numbness or tingling, or pain that medicine doesn't relieve. [1]
Bleeding, swelling or unusual drainage near the incision
Fever
Numbness or tingling near the graft site
Pain that doesn't get better with medication
What is the outlook after a bone graft?
In most cases, bone grafts heal without complications, and once the graft fuses, your new bone should stay strong and healthy for years to come. [1]
Recovery can take time, but steady follow-up and protecting the healing site make a successful result more likely.
Conclusion
Bone grafting gives your body the building blocks and the signal it needs to repair bone that can't heal on its own. Whether the graft comes from your hip, a donor, your bone marrow or a lab, the goal is the same: a solid, lasting repair.
Your surgeon will choose the graft that fits your health and your reason for surgery. Your biggest role is to protect healing, especially by avoiding tobacco, and to report warning signs early.
Facing bone graft surgery or recovering from a fracture? Explore more plain-language, physician-reviewed guides on Rinnit.com, and save this page to bring to your next appointment with your surgeon.
Frequently Asked Questions
What is a bone graft used for?
A bone graft repairs bones that don't heal correctly after a fracture, rebuilds bone lost to disease or infection, supports spinal fusion and joint replacement, and strengthens the jaw before a dental implant.
Where does bone graft material come from?
Bone graft material can come from your own body (usually the hip bone), from a donor, from bone marrow drawn from your hip, or from lab-made synthetic materials.
How long does a bone graft take to heal?
A bone graft takes anywhere from several weeks to about a year to heal. The time depends on the graft's size and location, your age and your overall health.
Is a bone graft painful?
You're asleep under anesthesia during surgery, and some pain is expected afterward. With an autograft, you may also have pain where the bone was taken. Call your doctor if pain doesn't respond to medication.
Can your body reject a bone graft?
It's rare, but it can happen. Most bone grafts heal without complications.
What is a dental bone graft?
A dental bone graft is a bone graft placed in the jaw to make it strong enough to hold a tooth implant. Learn more about your teeth and their supporting structures.
Does smoking affect bone graft healing?
Yes. Tobacco limits your healing potential, and research shows smokers have about twice the risk of bone that heals slowly or not at all.
Is autograft better than allograft?
Your own bone gives the best chance of fusion, but supply is limited and taking it can cause pain. Donor bone avoids a second harvest site, and your surgeon weighs these trade-offs for your situation.
Can donor bone spread disease?
The risk is low. Donor bone is screened, cleaned and sterilized under strict rules before it is used.
Will I need to limit activity after a bone graft?
Usually, yes. Your surgeon may ask you to protect the area with a brace, cast or limits on weight-bearing until the graft starts to fuse, so follow their timeline.
Related guides and resources
Bone Fractures: What Happens When a Bone Breaks, and How It Heals
Idiopathic Scoliosis: Symptoms, Causes, and Modern Treatment Options
Understanding SI Joint Fusion: Procedure, Benefits, and Recovery
Limb-Lengthening Surgery: Procedure, Timeline, Recovery and Risks
What Is a Broken Jaw? Causes, Symptoms, Diagnosis, Treatment, and Recovery
Nonunions, OrthoInfo (American Academy of Orthopaedic Surgeons)
How Broken Bones Heal, OrthoInfo (American Academy of Orthopaedic Surgeons)
Related Reading
Dental Bone Graft: Purpose, Procedure and Healing explains dental bone grafts for rebuilding the jaw.
Dental Implants: Types, Procedure, Recovery and Success Rates explains how dental implants replace missing teeth.
References
Cleveland Clinic. Bone Grafting: What It Is, Types, Risks and Benefits. Cleveland Clinic. Last updated August 9, 2021. https://my.clevelandclinic.org/health/treatments/16796-bone-grafting
Pearson RG, Clement RGE, Edwards KL, Scammell BE. Do smokers have greater risk of delayed and non-union after fracture, osteotomy and arthrodesis? A systematic review with meta-analysis. BMJ Open. 2016;6(11):e010303. PMID: 28186922. https://doi.org/10.1136/bmjopen-2015-010303
Kirzner N, Hilliard L, Martin C, et al. Bone graft in posterior spine fusion for adolescent idiopathic scoliosis: a meta-analysis. ANZ J Surg. 2018;88(12):1247-1252. PMID: 29763982. https://doi.org/10.1111/ans.14551
Shriver MF, Lewis DJ, Kshettry VR, et al. Pseudoarthrosis rates in anterior cervical discectomy and fusion: a meta-analysis. Spine J. 2015;15(9):2016-2027. PMID: 25982430. https://doi.org/10.1016/j.spinee.2015.05.010
Medical disclaimer
This article is for general education and does not replace advice from your own doctor. Always talk to your surgeon about the right graft and recovery plan for you.
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