Gum Surgery: Flap and Osseous Procedures Explained

What periodontal flap surgery and osseous surgery involves

When non-surgical treatment leaves deep pockets that continue to bleed and lose attachment, surgery gives direct access. The gum is lifted as a flap, the root surfaces and the bone are cleaned under direct vision rather than blindly through a pocket, and the flap is repositioned and sutured. Osseous surgery goes further: the bone itself is reshaped. Periodontitis destroys bone in an irregular pattern, leaving craters and defects that keep pockets deep no matter how well the area is cleaned. Recontouring the bone to a smoother architecture allows the tissue to heal at a level that can actually be maintained. Crown lengthening is the same technique used for a restorative purpose — removing bone to expose enough tooth for a crown margin.

When this treatment is used

Indicated for pockets that remain five millimetres or deeper after scaling and root planing and a proper re-evaluation, particularly where bleeding persists and bone defects are visible. Crown lengthening is indicated when a tooth has fractured or decayed to a level where no sound margin is available above the bone.

What to expect through recovery

Surgery on one or two quadrants under local anaesthetic, taking sixty to ninety minutes. Afterwards: swelling for a few days, discomfort manageable with anti-inflammatories, a soft diet for a week, and sutures removed at around seven to ten days. Chlorhexidine rinse is usually prescribed while brushing the area is impractical. The result patients are least prepared for is recession. Removing the diseased tissue and reshaping bone means the gum heals at a lower level, so teeth look longer, roots are exposed, sensitivity increases for a while and spaces appear between teeth. That is the intended outcome — a shallow cleanable sulcus rather than a deep pocket — but it should be discussed with photographs beforehand rather than discovered in a mirror afterwards.

Crown lengthening and the waiting period

When crown lengthening is done to expose a tooth for a restoration, the crown cannot be made immediately. The tissue needs time to stabilise at its new level — commonly six to twelve weeks, and longer in the aesthetic zone, because a margin placed before the tissue settles ends up either exposed or buried. That waiting period matters for planning and for annual maximums: the surgery may fall in one benefit year and the crown in the next, which can work in the patient's favour if it is anticipated.

Costs and insurance in summary

Typical fee range across the group: $0–$0 where a single band applies. Several codes here are priced individually and carry their own range on their own page. Priced per quadrant as major surgical treatment. Specialist fees run above general practice, and pre-authorisation is normal.

Benefit category: Major periodontal, typically 50% on a typical plan. Covered as major periodontal treatment with pre-authorisation, charting and radiographs. Plans generally require that non-surgical therapy was attempted first.

Common restrictions: Pre-authorisation almost always required; Evidence that scaling and root planing was performed first is expected; Frequency limited to once every 24–36 months per quadrant; Crown lengthening for cosmetic purposes is excluded.