Bone Grafting Before Implants: What to Expect

A dental implant requires a minimum of about one millimetre of bone around the entire circumference of the titanium post for stable, long-term integration. When less bone is available — because of time elapsed since extraction, periodontal disease, a trauma injury or developmental anatomy — the implant cannot achieve sufficient purchase in the bone to osseointegrate reliably. Rather than placing an implant in inadequate bone (which has a significantly higher failure rate), we rebuild the bone first and then place the implant in the optimal environment.

The most common scenarios requiring bone grafting before implant placement are: extraction sites where the tooth has been missing for more than a year without a replacement, patients with a history of moderate to severe gum disease that caused bone loss, and the upper back jaw where the sinus cavity sits close to the remaining bone. For the last case, a specific graft procedure called a sinus lift (or sinus augmentation) raises the sinus floor to create bone height.

Several types of graft material are used in modern dental implant preparation, each with different characteristics. The most common — and the one used most frequently at our clinic — is allograft: processed, sterilised bone from a human donor (typically from a tissue bank). Allografts are safe, effective, and eliminate the need for a second surgical site on your own body. The material is treated to remove all organic components; only the mineral scaffold remains, which your body gradually replaces with your own bone.

• Autograft — bone from your own body (chin, jaw or hip); highest bone-forming potential but requires a second surgical site.
• Allograft — sterilised processed human donor bone; most commonly used, no second surgical site needed.
• Xenograft — processed bovine (cow) or porcine (pig) bone mineral; excellent scaffold material, widely researched.
• Alloplast — synthetic materials such as hydroxyapatite or beta-tricalcium phosphate; no human or animal components.
• Combination grafts — mixtures of materials are often used to combine the bone-forming properties of one material with the structural properties of another.

Bone grafting is performed under local anaesthesia as an outpatient procedure. The area is numbed thoroughly — most patients report feeling pressure but no pain during the procedure. A small incision is made in the gum to expose the bone; the graft material is packed into the deficient area, often covered with a resorbable collagen membrane to hold it in place and prevent soft tissue from growing into the graft space before bone can form. The gum is then sutured closed.

The entire procedure typically takes 30–90 minutes depending on the volume of bone needed and whether one or multiple sites are being grafted. For a socket preservation graft placed at the same time as an extraction, the procedure adds only 15–20 minutes to the extraction appointment. The bone graft itself cannot be felt after the anaesthetic wears off — it is entirely within your jaw.

Recovery from a bone graft is similar to recovery from dental implant surgery — swelling and discomfort peak in the first two to three days and then decline steadily. Most patients return to work within two to three days and resume a normal diet within one to two weeks. Pain management is the same as for implant surgery: alternating ibuprofen and acetaminophen, ice packs for the first 48 hours, and a prescribed antibiotic course.

The critical difference from implant recovery is that the graft site must not be disturbed. Do not probe the area with your tongue, avoid vigorous rinsing for the first 24 hours, and follow all dietary restrictions. If the collagen membrane or graft material becomes displaced before the gum tissue seals over it, the graft may not integrate properly. Compliance with post-operative instructions is directly tied to graft success.

The waiting period between a bone graft and implant placement depends on the volume of bone added and where in the jaw the graft was placed. For a small socket preservation graft in a simple extraction site, the wait is typically three to four months. For a larger lateral ridge augmentation (rebuilding the width of the bone) the wait is four to six months. A sinus lift — the most extensive graft procedure for upper jaw cases — typically requires a waiting period of six to nine months before implant placement can proceed.

During this waiting period, a 3D cone-beam CT scan at the appropriate time will confirm the graft has integrated and sufficient bone is available for the implant. Dr. Kadivar will not proceed with implant placement until the imaging confirms the bone volume is adequate — placing an implant in an immature graft is a common cause of early failure and is something we are vigilant to avoid at our Markham clinic.

Bone graft success rates are high — above 95 percent for socket preservation and simple ridge augmentation procedures. The most common complication is graft dehiscence: a small opening in the gum over the graft site. Minor dehiscence often heals without intervention; larger openings may require a second closure procedure. Infection of the graft site is rare with antibiotic coverage but is treated promptly with antibiotics and, if necessary, irrigation of the site.

Factors that reduce graft success parallel those for implant success: smoking, uncontrolled diabetes, inadequate oral hygiene and aggressive post-operative rinsing. Patients who follow instructions carefully and attend all follow-up appointments have outcomes that consistently match the published success rates.

No — many patients have sufficient bone for implant placement without any grafting, particularly those who have the tooth replaced relatively soon after extraction. A 3D cone-beam CT scan is the only reliable way to determine whether grafting is needed; standard two-dimensional x-rays do not show bone width accurately enough to make this assessment. If you have been told elsewhere that you need a bone graft, a second opinion scan at our Markham clinic may confirm the finding — or may show that a graft is not required after all.

Book a consultation with Dr. Neda Kadivar for a 3D bone assessment. We will tell you clearly whether you need a graft, which material and volume would be used, what the recovery involves, and exactly how the graft timeline fits into your overall implant treatment plan — before you commit to anything.