Comparative Evaluation of Endo-sinus Bone Augmentation After Osteotome Sinus Floor Elevation Without Grafting Using...

Area of Science:

• Dentistry
• Oral and Maxillofacial Surgery
• Radiology

Background:

• Sinus floor elevation is crucial for maxillary posterior implants.
• Osteotome technique without grafting offers a less invasive approach.
• Accurate measurement of bone height and augmentation is essential for predictable outcomes.

Purpose of the Study:

• To compare measurement errors of residual bone height and endo-sinus bone gain between panoramic radiography and CBCT.
• To evaluate endo-sinus bone augmentation following osteotome sinus floor elevation without grafting.
• To identify factors influencing new bone formation in the sinus.

Main Methods:

• Retrospective study of 91 patients with 102 dental implants placed via osteotome sinus floor elevation without grafting.
• Panoramic radiography and CBCT scans taken preoperatively, immediately postoperatively, and before stage-two surgery.
• Analysis of endo-sinus bone augmentation, implant protrusion, and clinical outcomes like membrane perforation and implant success/failure rates.

Main Results:

• CBCT showed significantly smaller measurement errors for residual bone height compared to panoramic radiography.
• Endo-sinus bone gains were 1.31 mm (panoramic) and 1.80 mm (CBCT), with CBCT demonstrating higher values.
• Final endo-sinus bone gain positively correlated with implant protrusion length at baseline.

Conclusions:

• CBCT offers more accurate measurements for sinus floor elevation procedures.
• Osteotome sinus floor elevation without grafting can achieve approximately 2 mm of endo-sinus bone augmentation.
• Implant protrusion length is a key factor in successful bone augmentation, not intraoperative bone block elevation.