Bone Grafting
Rebuilding the jawbone so an implant has something solid to hold onto.
Learn moreRegenerative Therapy in Berwyn, PA
Rebuilding bone and attachment lost to gum disease, rather than simply halting the damage.
Tissue Rebuilding
Most periodontal treatment aims to stop disease progressing. Regenerative therapy goes a step further: it attempts to rebuild the bone and attachment that disease has already destroyed.
Bone lost to periodontitis does not return by itself. But in defects of the right shape — particularly narrow, deep, walled-in defects around a tooth root — the body can be prompted to regenerate genuine new bone, ligament and attachment, given the right conditions and enough protected space.
This is among the more technique-sensitive work in periodontics. Success depends on selecting cases correctly, executing meticulously, and controlling the biology of healing — which is why not every defect is a candidate, and why an honest assessment matters more than an optimistic one.
- Can rebuild bone lost to periodontal disease
- May save teeth otherwise considered hopeless
- Reduces pocket depth so the site can be cleaned
- Restores attachment rather than only halting loss
- Avoids or delays extraction and replacement
- Honest case selection rather than blanket application
How regeneration works
Healing is a race. After periodontal surgery, several tissue types compete to occupy the space next to the root — gum tissue grows fastest, bone and periodontal ligament much more slowly. Left alone, fast-growing soft tissue fills the defect and no bone is regained.
Guided tissue regeneration changes the odds. A barrier membrane is placed to exclude the fast tissue from the space, holding it open long enough for bone and ligament cells to populate it. The result, in the right case, is true regeneration rather than repair.
The materials involved usually include some combination of:
- Barrier membranes — resorbable or non-resorbable, excluding soft tissue from the healing space
- Bone graft material — scaffolding that maintains space and guides new bone formation
- Biologic agents — proteins such as Emdogain, whose active ingredient amelogenin is involved in the natural formation of tooth-supporting structures, used to encourage regeneration at the cellular level
Which defects respond
Case selection is the single largest factor in outcome. Regeneration works best when the remaining bone gives the defect a contained shape:
- Narrow, deep vertical defects with two or three remaining bony walls respond best — the walls hold the space and supply cells
- Furcation defects — bone loss between the roots of molars — can respond, particularly early-stage ones
- Broad, flat horizontal bone loss responds poorly; there is no contained space to regenerate into
Where regeneration is not realistic, pocket reduction surgery is the appropriate alternative — it reshapes the area so it can be kept clean, which preserves the tooth even if it does not rebuild bone.
Dr. Liu will tell you plainly which category your defect falls into. Attempting regeneration in a defect that cannot support it wastes time and money.
What determines success
Several factors are within your control and materially affect outcome:
- Smoking — substantially reduces regenerative success. This is the single most impactful thing a patient can change.
- Plaque control — the regenerated site must be kept meticulously clean during healing
- Maintenance visits — regenerated tissue is not immune to future disease
- Bite forces — excessive load on a healing site compromises it, so occlusal factors are managed alongside
- Diabetes control — poorly controlled blood sugar impairs healing generally
What to Expect
The Guided Tissue Regeneration Process
- Defect assessmentPocket depths, bone level and defect shape are mapped from probing and imaging. Whether the defect is contained enough to regenerate is established before treatment is proposed.
- Disease control firstActive infection is brought under control with non-surgical treatment, and home care is confirmed as effective. Regeneration into an uncontrolled site does not hold.
- Surgical accessUnder local anesthesia, the site is accessed with flap design chosen to preserve as much gum tissue as possible — tissue that must later cover and protect the graft.
- Debridement and placementThe root surface is thoroughly cleaned, then graft material, membrane and any biologic agent are placed and the flap closed to fully cover the site.
- Protected healingHealing is closely monitored over several months. The site is kept undisturbed early on, with specific cleaning instructions provided. Results are assessed with follow-up probing and imaging.
Been told a tooth needs extracting? Depending on the shape of the bone defect, regenerative therapy is sometimes an alternative. It is worth an evaluation before proceeding to extraction and implant.
Common Questions
Regenerative Therapy FAQs
In the right circumstances, yes — genuine new bone, periodontal ligament and attachment can form. The critical qualifier is defect shape. Narrow, contained defects with remaining bony walls regenerate; broad, flat bone loss does not.
Any practice promising regeneration regardless of defect type is overstating what the biology allows.
Initial healing takes a few weeks, but bone formation continues for six to twelve months. Meaningful assessment of the result therefore happens at around nine to twelve months, using probing measurements and imaging compared against the pre-treatment baseline.
It depends on the tooth and the defect. Keeping a natural tooth is generally preferable when it has a realistic long-term prognosis — natural teeth retain the periodontal ligament, which implants do not have.
But a tooth with severe, unsalvageable bone loss is better replaced than repeatedly treated. Dr. Liu will give you his honest assessment of the odds so you can weigh it against the alternative rather than guessing.
Yes, considerably. Smoking impairs blood supply and immune response in gum tissue, and the effect on regenerative outcomes is well documented in the literature.
If you smoke and are considering regenerative treatment, this is worth an honest conversation before proceeding — for some patients it changes which treatment makes sense.
Related Treatment
You May Also Need
Gum Surgery
When deep pockets cannot be cleaned any other way, surgery makes them cleanable again.
Learn moreGingivitis & Periodontitis Treatment
Understanding which stage of gum disease you have — and what can still be reversed.
Learn moreSchedule Your Consultation
Dr. Liu will evaluate your situation and explain your options — including the ones you may not have been offered elsewhere.