This page is for anyone who has lost a tooth, wears dentures, or is planning an extraction. It covers why the jawbone shrinks after tooth loss, how this changes your facial appearance over time, and what options — including dental implants and bone grafting — exist to address bone resorption. Jawbone loss begins immediately after extraction and progresses fastest in the first three to six months.
This page provides general information about dental implant treatment and is not a substitute for individual clinical assessment.
Jawbone loss is the gradual shrinkage of the alveolar bone that previously supported a tooth root. When a tooth is removed, the bone that surrounded the root no longer receives the mechanical stimulation it needs to maintain its volume. The body responds by breaking down this bone and redistributing its minerals elsewhere — a process clinicians call alveolar bone resorption.
This resorption affects both the width and height of the bony ridge where the tooth once sat. A peer-reviewed systematic review reports that within six months of extraction, horizontal bone loss typically ranges between 29% and 63%, while vertical bone loss ranges between 11% and 22% (Van der Weijden et al., 2012). The outer wall of bone — known as the buccal plate (the thin layer of bone on the cheek side of the jaw) — is the thinnest and resorbs fastest.
Jawbone resorption is not a disease or a complication. It is a predictable biological response to the removal of a tooth root. However, the consequences of leaving it unmanaged — particularly over months and years — can affect facial appearance, the stability of remaining teeth, and future treatment options such as dental implants. You can read a broader overview of how tooth loss causes the jawbone to shrink over time on our dental implants page, or explore the full treatment journey in our complete guide to dental implants.
Many patients who ask about jawbone loss are not simply looking for a clinical definition — they want to know whether the bone changes they are experiencing will affect their options, their appearance, or both. The answer depends on how much alveolar bone remains, how long ago the extraction took place, and whether bone preservation or restoration is part of your treatment goals.
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The jawbone shrinks because it loses the mechanical loading signal that a tooth root provides during chewing. This follows a well-established principle of bone biology known as Wolff’s Law — first described by German anatomist and surgeon Julius Wolff in 1892 — which states that bone adapts its mass and structure to the loads placed upon it. When loading decreases, the body reduces bone density in that area.
Every time you bite or chew, forces travel through each tooth root into the surrounding alveolar bone. These forces stimulate osteoblasts (the cells responsible for building and maintaining bone). When a tooth is extracted, that stimulation stops. The balance between bone formation and bone breakdown shifts. Osteoclast (bone-resorbing cell) activity increases due to localised inflammation, while osteoblast activity decreases due to the loss of mechanical stimulus. The result is a net loss of bone volume.
Research has identified that this resorption occurs in two overlapping phases. In the first phase, the bundle bone (the thin layer of bone directly attached to the tooth root via the periodontal ligament) is resorbed and replaced with woven bone. In the second phase, the outer surfaces of both the buccal and lingual bone walls undergo additional resorption, further reducing the ridge dimensions (Tian et al., 2012). This two-phase process explains why bone loss is both rapid initially and persistent over time.
This mechanism explains why the type of tooth replacement matters for bone health — bone preservation through implant placement is a direct consequence of restoring the mechanical stimulus that Wolff’s Law describes. Only a replacement that sits within the jawbone and transmits chewing force — such as a dental implant that bonds with bone through osseointegration — can provide the loading signal consistent with maintaining bone density. To understand the biology of how implants bond with bone, you can explore our page on osseointegration and how implants fuse with bone.
Facial collapse is the visible consequence of prolonged alveolar bone resorption after tooth loss. The alveolar bone provides the structural scaffolding that supports the soft tissues of your cheeks, lips, and lower face. As this bone resorbs, that scaffolding diminishes — and the soft tissue drapes over a reduced foundation. These changes are well documented in dental literature and progress predictably when no bone-stimulating replacement is in place. Because only a tooth replacement that integrates with the jawbone through osseointegration can restore root-level stimulation, other replacement options such as dentures and bridges cannot prevent these structural changes from progressing.
The cheeks lose fullness and begin to appear hollow or sunken — a change particularly noticeable when premolars and molars are missing, because these teeth and the bone surrounding them provide the primary structural support for the mid-face. As the bone ridge behind the lips shrinks, the lips themselves appear thinner, vertical wrinkles form around the mouth, and the upper lip may appear longer and more pronounced as bone height decreases. The link between missing teeth and a sunken facial appearance becomes more visible as months and years pass without intervention.
The lower face shortens as the jawbone loses vertical height — particularly after the loss of back teeth. The distance between the nose and chin decreases, and the jaw can overclose, causing the chin to appear more pointed and closer to the nose. This is sometimes described clinically as a loss of vertical dimension of occlusion (VDO — the measured height of the lower face when the teeth are in contact). Alveolar bone resorption and facial structure changes of this kind tend to age a person’s appearance well beyond their actual years.
Many patients at Deepcar Dental Care describe noticing these changes gradually over several years, often without initially connecting them to earlier tooth loss. Posterior tooth loss typically causes faster and more visible facial change than anterior tooth loss because back teeth bear the highest bite forces and maintain the vertical height of the lower face.
Alveolar bone resorption begins immediately after a tooth is extracted and progresses fastest in the first three to six months. After this initial period, the rate slows but continues indefinitely. Evidence suggests the jawbone continues to lose volume at an estimated rate of 0.5% to 1% per year after the first six months (published clinical literature, 2019). Understanding this timeline is important because bone loss that progresses without intervention — consistent with the disuse atrophy mechanism described by Wolff’s Law — may eventually require bone grafting before implant placement becomes viable.
In the first one to two weeks after extraction, a blood clot forms in the socket and the body begins clearing bone debris. Soft tissue starts to close over the site, though remodelling has already begun at a cellular level before any visible external change occurs.
The most dramatic bone remodelling takes place between three and six months. The buccal plate resorbs significantly, the ridge narrows and flattens, and width loss tends to exceed height loss. Of the bone width typically lost in the first year, research suggests approximately 30% of that total loss occurs within the first 12 weeks (published clinical literature, 2019).
After the first year, the rate of remodelling slows — but the ridge continues to lose volume indefinitely. Published research suggests that up to 50% of alveolar bone width may be lost within the first twelve months following extraction (published clinical literature, 2019). Facial changes may become noticeable during this period, particularly if multiple teeth have been lost. If the extraction site is left untreated for several years, the ridge may become too narrow or too short to support a standard dental implant without prior bone augmentation. The longer bone resorption progresses without intervention, the more likely it is that augmentation will be required — adding time, cost, and an additional healing stage to treatment.
If you are concerned about bone loss following extraction, or if you have been told you may lack sufficient bone for implant treatment, our page on whether you have enough bone for dental implants explains how bone volume is assessed and what options are available.
Several clinical pathways exist for patients experiencing alveolar bone loss, depending on the extent of resorption and individual circumstances. Not all jawbone loss rules out implant treatment — but the longer it is left unaddressed, the more complex treatment may become.
Dental implants are the only tooth replacement option that sits within the jawbone and transmits chewing force into the bone. Through osseointegration (the process where the titanium implant surface fuses directly with living bone), the implant restores a mechanical loading signal consistent with Wolff’s Law. Long-term clinical studies — including follow-up periods exceeding thirteen years — report stable marginal bone levels and survival rates above 94% around loaded implants (long-term systematic review data). However, it is important to note that implants maintain bone at the implant site rather than reversing bone loss that has already occurred elsewhere. Some researchers have noted that the evidence for implants actively preserving alveolar bone height requires further study, and the effect may vary between patients and implant sites.
Bone grafting may be required before implant placement if significant resorption has reduced the available bone volume. A graft involves placing bone material into the deficient area to rebuild ridge width or height. Socket preservation — grafting at the time of extraction — can also reduce the extent of bone loss before it progresses. If bone grafting is relevant to your situation, our page on bone graft procedures for dental implants explains the types of graft, healing timelines, and what to expect.
Dentures and bridges replace the visible tooth but do not replace the root. Dentures rest on the gum surface and do not provide bone stimulation. Some clinical evidence suggests that the compressive pressure of a denture against the gum may contribute to ongoing bone resorption at the areas of contact, rather than slowing or halting the process. Bridges span a gap using adjacent teeth for support but similarly do not stimulate the bone beneath the missing tooth.
If you are unsure which replacement approach suits your clinical situation, our page on which implant type is right for you can help you understand the options based on how many teeth are missing and the condition of your jawbone.
Untreated alveolar bone resorption carries consequences that extend beyond facial appearance and can affect oral function, remaining teeth, and future treatment options.
Adjacent teeth may drift into the gap left by the missing tooth, changing bite alignment and creating new areas where food traps and plaque can accumulate. Remaining teeth absorb greater functional load — with fewer teeth sharing the force of chewing, the stress on each remaining tooth increases, potentially accelerating wear or fracture.
Dentures become progressively less stable as the ridge beneath them resorbs. The fit deteriorates over time, leading to slipping, discomfort, and the need for frequent relining or replacement. Because dentures do not provide the osseointegration-based bone stimulation that implants offer, bone loss beneath a denture continues regardless of how well the denture initially fits.
Future implant treatment becomes more complex when bone resorption has progressed significantly. Standard implant placement may not be possible without prior bone grafting, which adds an additional surgical stage and healing period. In cases of severe or prolonged bone loss, more complex surgical approaches may be required to establish a foundation sufficient for implant placement.
In clinical practice, the cumulative nature of bone resorption is what catches most patients off guard. The changes are gradual enough that they go unnoticed for months — and by the time a patient seeks assessment, the bone situation is often more advanced than they expected. This reinforces why an earlier assessment tends to result in a simpler, shorter, and less costly treatment pathway.
None of these consequences are inevitable if intervention occurs early. A clinical assessment — ideally including a CBCT scan to visualise the bone in three dimensions — provides the most reliable picture of your individual bone situation and the options available to you.
Patients often ask this after reading conflicting information online — and the variation in answers is real, because the word “reversed” means different things depending on context. Alveolar bone does not regenerate spontaneously once resorption has occurred. However, bone grafting procedures can rebuild lost volume in many cases by placing bone material into the deficient area to encourage new bone formation. If sufficient bone remains or can be restored, dental implant placement can provide mechanical loading that helps maintain bone at the implant site. The key factor is clinical assessment of your current bone volume and overall health.
Age does not determine whether bone loss occurs — resorption is triggered by root removal regardless of the patient’s age or overall dental health. It is a well-established biological response to tooth extraction, not a complication or a sign that something has gone wrong. However, the rate and extent of resorption vary between patients. Factors that influence how quickly bone is lost include the tooth location, the thickness of the surrounding buccal plate, smoking status, and whether socket preservation was performed at the time of extraction.
Dentures replace the visible portion of missing teeth but do not replace the root within the jawbone. They sit on the gum surface and provide no bone-stimulating load consistent with the mechanical loading principle described by Wolff’s Law. Over time, the ridge beneath a denture continues to resorb. Some clinical evidence suggests that the compressive pressure from a denture may contribute to ongoing bone resorption at the contact points rather than slowing the process.
Dental implants are placed directly into the jawbone and bond with the surrounding bone through osseointegration. Once loaded with a crown, the implant transmits chewing forces into the bone — providing mechanical stimulation consistent with the principle that bone maintains its density when loaded. Long-term clinical studies — including follow-up periods exceeding thirteen years — report stable bone levels and survival rates above 94% around loaded implants.
The most favourable window for intervention is within the first three to six months after extraction, when the majority of bone resorption occurs. If you have recently had a tooth extracted, or if you notice changes such as sunken cheeks, shifting teeth, or a denture that no longer fits properly, a clinical assessment with imaging can determine your current bone status and available options.
Not always — many patients have sufficient bone for implant placement without prior grafting. Whether a graft is needed depends on factors that vary from person to person, which is why a scan-based assessment is the only way to know for certain. The amount of bone remaining at the implant site, the specific location in the jaw, and the time elapsed since extraction all play a role. A CBCT scan provides the precise three-dimensional measurements needed to determine whether grafting is required in your individual case.
Understanding how jawbone loss progresses is an important first step — but the next step is a clinical assessment of your specific bone situation, because every patient’s anatomy and treatment timeline is different.
If you have lost one or more teeth and are noticing changes to your facial appearance, bite alignment, or denture fit, these may be signs that alveolar bone resorption is progressing. A clinical assessment is the most reliable way to understand your bone situation and the treatment pathways available to you.
At Deepcar Dental Care, Dr Ibraheem Ijaz assesses jawbone volume using clinical examination and imaging, and provides honest recommendations tailored to each patient’s clinical situation — including whether bone grafting, implant treatment, or an alternative approach is most appropriate.