Can alveolar bone really “regenerate naturally”?

It depends on which bone you mean. New bone does form naturally inside an extraction socket, but the interval in which mineralized bone is laid down varies greatly from person to person and is unpredictable [F3]. By contrast, reduction in alveolar-ridge shape does not reverse on its own, and the amount of resorption after natural healing differs by tooth site (mean clinical horizontal reduction 2.73 mm at non-molar sites and mean radiographic horizontal reduction 3.61 mm at molar sites) [F4]. As for supporting tissues destroyed by periodontitis, healing after routine non-surgical or surgical treatment is mainly formation of a long junctional epithelium, with no or only unpredictable periodontal regeneration [F2].

Can dental cleaning and careful brushing make the bone grow back?

The available literature does not support that claim, but these measures can do something else important. Evidence about the mode of healing is in the preceding answer [F2]. Initial treatment can reduce pocket depth and increase clinical attachment, with most improvement appearing in the first 1 to 2 months after subgingival instrumentation (the intervention in the literature is subgingival instrumentation, which is broader than what everyday speech calls “dental cleaning”) [F9]. With long-term maintenance, the pooled survival rate of periodontally treated molars was 82% (mean follow-up 14.7 years) [F10], and people with regular follow-up had a lower risk of tooth loss than those with irregular follow-up (risk ratio 0.56) [F11]. The goal is to stop further loss, not to turn the bone back to what it was.

After my wisdom tooth was removed, there is a hollow area behind the tooth next to it. Will it get better by itself?

This is one situation in which the literature has documented partial spontaneous improvement, but it does not happen for everyone and still needs follow-up. A retrospective imaging study recorded that, after removal of a horizontally impacted mandibular wisdom tooth, a radiographic intrabony defect greater than 6 mm distal to the second molar could decrease gradually over time, and more than half the sample returned to a nearly normal healthy condition (≤3 mm) by 6 months [F6]. But the study was a retrospective panoramic-radiograph analysis without a control group [F6]. In addition, a 2025 overview of the same clinical question found measurable additional effects of interventions such as ridge preservation on pocket depth, attachment level, and alveolar bone height at that site [F7]. Whether to intervene requires a dentist's assessment of your imaging and periodontal condition.

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Can Lost Alveolar Bone Regenerate Naturally?｜證據鏈

km 編輯部2026-08-13About 17 min read

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