Bone Quality Obtained in Sinus Lifting with Anorganic Bovine Bone. A CBCT Study

Abstract

Objective: Quantitatively assess bone density in maxillary sinus lifting with ABB (Bio-Oss®), using Cone-Beam computed tomography 6 months after surgery. Material and methods:A retrospective observational study was conducted between February 2018 and February 2019 on 33 Cone-Beam tomographic studies of 29 adult patients of both genders, with maxillary sinus fl oor lift, using Bio-Oss® small particles ( 0.25-1um), large particles (1-2um) or a 50-50 % mix of both, always using Bio-Gide® membranes, in order to measure bone density through Hounsfi eld Units (UH) after 6 months of healing. Results:The average density of the grafted sinuses was 586 ± 238 HU, corresponding to Type II-III bone. Gender (p = 0.079) and Residual bone (p = 0.681) showed no signifi cant differences, while Age (p = 0.015) and Particles Size (p = 0.002; p <0.05), were signifi cant. The highest tomographic density was obtained in patients older than 65 years; and in mixed particles size grafts. Conclusion:The bone density obtained after maxillary sinus lifting with Bio-Oss shows quantitative values similar to those of type II-III bone, providing a high degree of predictability for implant placement 6 months after the intervention.

Volumetric Comparison of New Bone Formation in Sinus Floor Augmentation Using Allografts with/without Platelet-Rich Fibrin Cohort Research (Retrospective)

“…Hounsfield unit (HU) measurement was also performed to evaluate the bone quality on sagittal sections of CBCT scans as proposed by Martinez et al 11 The area of the greatest volume of the bone grafts was determined in a sagittal section. Three measurements with 2 mm vertical distance were made in anterior, middle, and posterior regions of newly regenerated bone mass.…”

“…12 Similarly, Melisa et al reported an average bone density of 586±238 HU, a value also corresponding to Type 2-3 bone according to the Lekholm and Zarb classification. 11,12 Residual ridge height is the height of the alveolar bone before the sinus floor augmentation and new bone formation. The height of the ridge increases with the new bone regeneration in the elevated sinus.…”