Crestal sinus augmentation in a head back position: Retrospective case series.

Area of Science:

• Oral and Maxillofacial Surgery
• Dental Implantology
• Regenerative Dentistry

Background:

• Maxillary sinus augmentation is crucial for dental implant success in atrophic jaws.
• Crestal Sinus Augmentation (CSA) offers a less invasive approach compared to traditional lateral window techniques.
• Evaluating novel techniques like CSA in a head back position (CSA-HBP) is essential for optimizing clinical outcomes.

Purpose of the Study:

• To assess the clinical efficacy and safety of Crestal Sinus Augmentation in a head back position (CSA-HBP).
• To evaluate maxillary sinus mucosal elevation height (EH) and new bone height (NH) following CSA-HBP.
• To determine complication rates and cumulative survival rates (CSR) associated with the CSA-HBP procedure.

Main Methods:

• A study involving 209 patients and 348 maxillary sinus sites was conducted.
• Data collected included complications, mucosal perforation rate, and CSR.
• Cone-beam computerized tomography and periapical radiographs were used to measure EH and NH.
• Sites were categorized by residual bone height (RBH ≤5 mm vs. >5 mm) and molar location (second/third vs. other).

Main Results:

• The mean RBH was 6.63 mm, mean mucosal EH was 4.04 mm, and mean NH was 2.36 mm.
• The overall mucosal perforation rate was low at 1.44%, with minimal complications reported.
• An 8-year CSR of 99.71% was achieved.
• Higher EH and NH were observed in sites with less initial bone height (RBH ≤5 mm).

Conclusions:

• Crestal Sinus Augmentation in a head back position (CSA-HBP) is a minimally invasive and reliable technique.
• The procedure demonstrates a high success rate and favorable bone regeneration.
• CSA-HBP is a viable option for maxillary sinus augmentation prior to dental implant placement.