Volumetric change after maxillary sinus floor elevation using absorbable collagen sponge: a retrospective cohort...

Area of Science:

• Dentistry
• Oral Surgery
• Regenerative Medicine

Background:

• Maxillary sinus floor elevation is a common procedure for dental implant placement.
• Absorbable collagen sponge (ACS) is used to support bone regeneration in this procedure.
• Understanding factors influencing bone volume changes is crucial for predictable outcomes.

Purpose of the Study:

• To evaluate bone volume changes after using absorbable collagen sponge (ACS) during maxillary sinus floor elevation.
• To identify factors associated with these bone volume changes.

Main Methods:

• Retrospective evaluation of 108 patients undergoing maxillary sinus elevation via crestal approach (CA) or lateral approach (LA).
• Absorbable collagen sponge (ACS) was used, and dental implants were placed simultaneously.
• Three-dimensional (3D) analyses of cone-beam computed tomography (CBCT) images assessed bone volume changes at 12 months.
• Uni- and multivariable analyses identified factors influencing bone volume changes.

Main Results:

• Significant new bone formation was observed via 3D analysis following ACS use.
• Bone volume changes in the CA group were significantly influenced by the number of ACSs and sinus membrane perforation (P<0.001).
• In the LA group, bone volume changes were significantly affected by the number of ACSs (P=0.001).

Conclusions:

• Absorbable collagen sponge (ACS) use in maxillary sinus elevation leads to new bone formation.
• Adequate bone formation can be achieved by using an appropriate number of ACSs.
• Factors like ACS quantity and membrane integrity impact bone volume changes, particularly with the crestal approach.