Bone Grafting and Sinus Lifts for Implants
A bone graft rebuilds jawbone volume where there is not enough for an implant; a sinus lift raises the sinus floor to create height for upper back teeth. Many cases need none, moderate grafting is often done at the same time as placement, and larger grafts heal for four to six months first.
Grafting is only needed where bone volume is inadequate, confirmed on a CBCT scan, not a flat X-ray.
Socket preservation at the time of extraction protects bone for a future implant.
Sinus lifts create height for upper molar and premolar implants.
Healing adds three to six months where a staged graft is required.
Where bone is severely deficient, alternatives include shorter implants or specialist zygomatic implants.
Why bone matters and when grafting is needed
An implant needs enough surrounding bone to hold it firmly and to support the gum around it. Bone is lost after extractions, long-term denture wear, gum disease, or trauma. Whether a graft is needed is a three-dimensional question that only a CBCT scan can answer; many sites that look marginal on a flat panoramic X-ray turn out to be placeable once the scan is analysed.
Where grafting is needed, it ranges from small to substantial. Socket preservation places graft material into an extraction socket on the day the tooth comes out, holding the ridge shape for a future implant. Ridge augmentation rebuilds an already-shrunken ridge and is usually healed before the implant goes in.
Sinus lifts for the upper back teeth
The maxillary sinus sits above the upper back teeth, and after those teeth are lost the sinus can expand downward, leaving too little bone height for an implant. A sinus lift raises the sinus floor and packs graft beneath it to create height. The lateral-window technique opens a small hatch through the cheek-side gum; the crestal technique works upward through the implant channel and suits smaller lifts.
Recovery is usually described as similar to a wisdom-tooth extraction, with mild swelling and pressure for a few days. Graft material is commonly a processed bovine mineral with a long clinical record, or a synthetic alternative where preferred.
When there is not enough bone
Severe bone loss does not automatically rule out implants. Options include shorter or narrower implants designed for limited volume, larger block grafts, or, for the most resorbed upper jaws, zygomatic implants anchored in the cheekbone. Zygomatic placement is specialist work that not every clinician offers.
Certain medical histories raise grafting risk, including bisphosphonate use and previous head-and-neck radiotherapy. These are flagged on the matching form so the case goes to a clinician comfortable with the pathway, which may include onward referral.
Bone grafting questions answered
Common questions on this topic, with specific UK figures where they apply.
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