Transcrestal Sinus Elevation with Implant Placement Using Autogenous Bone Supporting Multilayer Crosslinked Collagen...

Area of Science:

• Oral and Maxillofacial Surgery
• Dental Implantology
• Regenerative Medicine

Background:

• Atrophic posterior maxilla poses challenges for dental implant placement due to limited residual bone height (RBH).
• Transcrestal sinus elevation is a technique to augment bone volume in the posterior maxilla.
• A minimally invasive, one-stage approach is desirable for patient outcomes.

Purpose of the Study:

• To evaluate a novel one-stage transcrestal sinus lift technique.
• To assess the efficacy of a double-layer crosslinked collagen scaffold (MCCS) with autogenous bone.
• To determine bone gain and implant stability in patients with RBH ≤ 6 mm.

Main Methods:

• Prospective study of 11 patients with mean RBH of 4.75 mm.
• One-stage transcrestal sinus floor elevation with simultaneous implant placement.
• Utilized autogenous bone chips and a double-layer MCCS under the Schneiderian membrane.

Main Results:

• Significant vertical bone gain (ΔRBH) of approximately 3.1 mm achieved.
• All implants demonstrated stable osseointegration with no complications.
• MCCS effectively sealed minor membrane perforations, facilitating healing.

Conclusions:

• The double-layer MCCS and autogenous bone approach is safe and effective for transcrestal sinus lifts.
• This minimally invasive technique successfully augments bone in atrophic maxillae with low RBH.
• The one-stage protocol facilitates predictable dental implant placement in challenging sites.