Dental Bone Grafting: Advanced Techniques Compared

The bone is missing. The implant cannot be placed. It seems like the end. Instead, it is the beginning of a choice — the choice of the right technique.

Today there are four advanced dental bone grafting techniques. Each has its indications, limitations, and evidence base. Confusing them or applying them randomly is the first mistake. The second is not knowing them all.

Ridge expansion: working with the patient’s own bone

When the ridge is narrow but has sufficient height, ridge expansion widens it from within. Osteotomes, chisels, discs — different instruments for the same principle: exploiting bone elasticity without harvesting from other sites.

Dr. Ernesto Bruschi has practised this technique for over thirty years, following the method of the Bruschi-Scipioni school. It is the least invasive among available techniques, and often allows implant placement in the same surgical session.

A meta-analysis of over 1,400 implants placed in expanded ridges documented survival rates above 95% — results comparable to those in native bone.

GBR: guided bone regeneration

Guided bone regeneration uses barrier membranes and biomaterials to create the conditions in which the body regenerates bone. No harvesting, no donor site. The membrane protects the space, the biomaterial provides a scaffold, and the patient’s osteogenic cells do the work.

It is the most widely used technique worldwide for small-to-medium horizontal and vertical defects. Maturation times are longer — 6-9 months — but 10-year results show peri-implant volume stability comparable to non-regenerated bone.

Maxillary sinus lift: creating space where nature removed it

In the posterior maxilla the sinus is the obstacle. It descends, expands, reduces available bone. The maxillary sinus lift elevates the sinus membrane and creates the needed volume.

Two approaches: crestal (minimally invasive, with simultaneous implant placement) and lateral (for major augmentations). The LMSF technique developed by the Bruschi-Scipioni school is the crestal variant that uses only the patient’s native bone, without added biomaterials — published in peer-reviewed journals since 1998.

A meta-analysis in Scientific Reports confirms that crestal sinus lift without biomaterial achieves results equivalent to grafted techniques.

Autologous bone graft: when your own bone is needed

Autologous grafting — from the chin, mandibular ramus, or in extreme cases the iliac crest — remains indicated for large three-dimensional defects where the volume to reconstruct is significant. It has the advantage of bringing living osteogenic cells. It has the disadvantage of a second surgical site, with the morbidity that entails.

Indications have narrowed over the years. Modern techniques — ridge expansion, GBR with latest-generation biomaterials, sinus lift — cover most cases. Extraoral harvesting remains reserved for post-traumatic or oncological reconstructions.

There is no best technique

There is the right technique for a given defect. A horizontal mandibular defect is not treated like vertical maxillary atrophy. A narrow but tall ridge is expanded; a short ridge is augmented vertically with GBR or compensated with a sinus lift.

The Wang and Al-Shammari classification helps decide: class A (minimal defect) → standard implant; class B (moderate defect) → expansion or GBR; class C (severe defect) → combined approach or graft.

Dr. Ernesto Bruschi, oral surgeon and implantologist at Centro Odontoiatrico Denti Più in Frosinone (Italy), practises all these techniques and selects them based on the diagnosis, not on a protocol. His peer-reviewed publications document outcomes of ridge expansion and maxillary sinus lift.

For a consultation: +39 0775 889009.