Do You Need a Bone Graft When a Tooth Is Pulled?

In the Austin area? Dr. Verrett provides this care in North Austin. See Bone Grafting for Dental Implants, or request a consult.

A patient whose tooth is about to come out is often asked a second question at the same visit: should the socket be grafted? It sounds like an add-on. It is really a decision about what the jaw will look like in six months, and whether an implant will fit there without more surgery. The answer depends on the tooth, the bone around it, and what will replace it. This article sets out what the research shows, so the question can be answered with the facts in hand.

What Happens to the Bone After a Tooth Is Pulled

The bone around a tooth exists to hold that tooth. Once the tooth is gone, part of that bone is no longer needed, and the body begins to remove it. This is normal healing, not a complication.

The process is well documented. In a 12-month study of 46 patients who had a premolar or molar removed, Schropp and colleagues found that the major changes in the extraction site happened during the first year. A systematic review of 20 human studies by Tan and colleagues put numbers on it: at six months, sockets left to heal on their own had lost 29 to 63 percent of their width and 11 to 22 percent of their height, with the fastest loss in the first three to six months.

Why the cheek side shrinks most was shown in an animal study by Araújo and Lindhe. In dogs, marked changes occurred within eight weeks of extraction, and the outer (cheek-side) wall lost more height than the inner wall. The top of that outer wall was made entirely of the thin layer of bone that anchored the tooth’s ligament, and that layer is resorbed once the tooth is gone. It is an animal study, but the pattern it described matches what is seen in people.

The thickness of that outer wall matters a great deal. In a 3D scan study of 39 patients having front teeth removed, Chappuis and colleagues found that where the wall was 1 millimeter thick or less, the median loss of height was 7.5 millimeters within eight weeks, against 1.1 millimeters where the wall was thicker. In the front of the upper jaw, a thin wall is common.

What Socket Preservation Is

Socket preservation, also called ridge preservation, means filling the socket with bone graft granules at the moment the tooth comes out, usually covering them with a membrane, and sometimes adding platelet-rich fibrin (PRF) made from the patient’s own blood. The granules act as a scaffold that the body’s own bone grows into over the following months. It adds little time to the extraction visit, and recovery is much like that of the extraction itself.

What It Can Do, and What It Cannot

It reduces shrinkage. The 2019 meta-analysis by Avila-Ortiz, Chambrone and Vignoletti, prepared for the European Workshop on Periodontology, pooled 22 randomized trials. Grafting the socket prevented about 2.0 millimeters of width loss and 1.7 millimeters of height loss on the cheek side, compared with extraction alone. Particle grafts of donor or bovine bone covered with a collagen membrane or sponge gave the most favorable results for width.

It does not stop shrinkage. The same review describes ridge preservation as an effective way to attenuate the loss that normally follows an extraction, not prevent it. In a randomized trial of 53 patients by Avila-Ortiz and colleagues, grafted sockets still lost about 8 percent of their bone volume over 14 weeks, against about 16 percent without a graft.

It reduces the need for more grafting later. This is the outcome that matters most to a patient planning an implant. In that 2020 trial, extra bone grafting was judged necessary at implant placement in 48.1 percent of sockets left alone and 11.5 percent of grafted sockets. A systematic review by Mardas and colleagues for the European Association for Osseointegration found the same direction, with grafted sites far less likely to need further augmentation.

It has not been shown to make implants last longer. The Mardas review found implants in grafted and ungrafted sites had similar survival and bone levels. The 2021 Cochrane review by Atieh and colleagues, which included 16 randomized trials and 524 extraction sites, found that grafting with bovine bone reduced the loss of width by about 1.2 millimeters and of height by about 1.4 millimeters at six months. It rated that evidence very low in certainty, and found no clear difference in the need for further grafting or in implant failure, largely because few trials followed patients long enough.

The evidence, read fairly, says socket preservation keeps more bone and makes the later implant simpler more often. It does not say that every socket needs one, and its long-term benefit for the implant itself is not proven.

When It Is Usually Worth Doing

The 2019 European Workshop consensus by Tonetti and colleagues named six considerations that should guide what happens to a socket and when an implant goes in: infection, whether the implant can be held stable in the right position, a damaged socket, the thickness of the gum and bone, esthetic demands, and the patient’s general health. Applied to an individual tooth, they usually point toward grafting in these situations:

• An implant is planned, but not on the same day. When the implant will go in after healing, keeping the ridge’s width and height is the whole point. That is the setting in which the trials above found less need for extra grafting.
• A front tooth. In the smile line, the shape of the bone decides how natural the gum looks around the final tooth. Shrinkage that would not matter at the back of the mouth can show at the front.
• A thin cheek-side wall. Thin walls lose the most bone, as the Chappuis study showed. In a study of 140 front-tooth and premolar sites by Couso-Queiruga and colleagues, a planned implant needed extra grafting in 60 percent of ungrafted sites against 11.4 percent of grafted ones, and every additional millimeter of wall thickness made extra grafting markedly less likely. That was a retrospective study based on virtual implant planning, so it is weaker evidence than a trial.
• A damaged socket. Infection, a cracked root, or a difficult extraction can leave a wall missing. That socket needs more than a simple fill, and the patient should know so before the tooth comes out.
• A bridge in the front of the mouth. Preservation is not only for implants. In a study of 88 patients by Couso-Queiruga and colleagues, grafted front-tooth sockets under a planned bridge needed fewer adjustments to the false tooth and shrank less, although some still needed a gum graft for the best result.

When It May Not Be Needed

• The implant goes in the same day. When the socket walls are intact, there is no active infection, and the implant can be held firmly in the right position, an implant can sometimes be placed at the extraction visit. The socket is not “preserved” separately; instead, the gap between the implant and the bone is grafted. The implant alone does not stop the bone from shrinking: in a study of 18 patients by Botticelli, Berglundh and Lindhe, with no graft placed, the cheek-side bone lost about 56 percent of its width in four months. In a randomized trial of 86 patients by Sanz, Lindhe and colleagues, grafting that gap reduced the loss on the cheek side to 1.1 millimeters, against 1.6 millimeters without it. That is why the gap at a same-day implant is almost always grafted in this practice. How long does a dental implant take? explains what same-day placement does to the timeline.
• The tooth will not be replaced. If no implant or bridge is planned, for example a back tooth the patient has decided to leave as a gap, there is usually no reason to graft. A critical review by Mardas and colleagues asked whether ridge preservation is sometimes overtreatment, and concluded that its added benefit over natural healing is debated in certain situations. A patient unsure about replacement can ask how a later implant would be affected if the socket is left alone, since a shrunken ridge can still be rebuilt later, with more surgery.
• A small socket with thick walls, where some shrinkage will not matter. The trials show less benefit where the walls are thick. In these sites the decision is a judgment call, and the scan helps make it.

Molars Are a Different Decision

Several of the studies above looked only at front teeth and premolars. Molar sockets are wide and have several roots, and in the upper jaw the sinus often sits just above them. The evidence specific to molars is thinner but points the same way. A 2025 meta-analysis by Wei and colleagues, pooling 7 studies and 237 molar sockets, found that grafting reduced shrinkage and the need for extra grafting at implant placement. When only the randomized trials were analyzed, the difference in width was no longer statistically clear, and the results varied widely between studies.

In the upper back jaw the sinus changes the question. In a randomized trial of 40 patients whose upper back teeth had roots reaching the sinus, Cha and colleagues found that grafted sockets kept 7.3 millimeters of bone height at six months against 4.8 millimeters in ungrafted ones. Implants could be placed without a sinus lift in 42.9 percent of the grafted sites, while every ungrafted site needed one. For a lower molar the considerations are different, and a 3D scan of the specific site is what decides it.

What the Graft Is Made Of

A socket graft is made of granules of bone graft material, packed into the socket and usually covered with a resorbable collagen membrane. The granules may be processed human donor bone, processed bovine bone mineral, or a synthetic mineral, and platelet-rich fibrin from the patient’s own blood is often added. The Cochrane review found no clinically important difference between graft materials for preserving a socket. Bone graft materials for dental implants explains each one, and PRF explains what the blood product adds.

A socket graft is not a block graft. This office does not harvest blocks of bone; ridges that need more than a socket graft are rebuilt with particulate grafts under a membrane, as block graft or particulate ridge augmentation? explains.

Healing Time Before an Implant

In this practice a grafted socket is usually ready for an implant in three to six months: toward the shorter end for a small socket with all its walls, and longer where a wall had to be rebuilt or the site is next to the sinus. Readiness is confirmed on a 3D scan and in the mouth rather than by date. During healing, a temporary tooth or partial denture that presses on the graft can undo much of the work, so any appliance is adjusted at the surgical visit to keep pressure off the site.

What It Means for the Cost Conversation

A socket graft is a separate procedure, and it is itemized as its own line on the written estimate, apart from the extraction and the implant. That makes the trade-off visible: a graft now against the chance of a larger graft at implant placement. More expensive materials are not necessarily better. In an analysis of the published trials by Barootchi and colleagues, spending more on the graft material did not buy a better result, while spending on a barrier membrane was associated with less shrinkage, up to a point. The practice is out of network; it files claims on the patient’s behalf and the insurer reimburses the patient directly. Implant cost and insurance explains how estimates are put together.

Questions Worth Asking Before the Tooth Comes Out

• Is an implant possible on the same day, and if not, why not?
• How thick is the bone on the cheek side of this tooth?
• If the socket is not grafted, what is the chance I will need more grafting later?
• What material would be used, and will it be covered with a membrane?
• How long before the implant could go in?
• If I am not sure I will replace the tooth, what do I lose by waiting?

If an extraction is planned for a tooth that might later be replaced with an implant, these questions are easiest to answer before the extraction rather than after it.

How This Office Approaches It

Dr. Andrew Verrett is a Diplomate of the American Board of Periodontology and the only doctor at Austin Periodontal Associates in North Austin. When a tooth is removed with an implant planned for later, the socket is usually preserved with a particulate graft under a resorbable membrane, often with PRF drawn at the start of the visit. When an implant is placed the same day, the gap around it is grafted almost every time, as is any thin area found when an implant goes in. Every ridge graft is planned on a 3D scan, and the extraction itself is done as gently as possible to protect the thin outer wall. Bone grafting for dental implants describes the procedure and recovery. Request a consult or call (512) 346-6097.