Assessment of Bone Density in the Posterior Maxilla Based on Hounsfield Units to Enhance the Initial Stability of Implants

Abstract

More than 80% of the edentulous posterior maxillae consisted of porous cortical crest or no cortical bone according to CT, although the bone densities varied markedly among individuals. More detailed assessments of bone density may be useful to enhance initial stability of implants in the posterior maxilla.

Evaluation of the role of autogenous bone-marrow–derived mesenchymal stem cell transplantation for the repair of mandibular bone defects in rabbits

“…Hounsfield units (HU), a standardized CT attenuation coefficient, can be used as a quantitative measurement of bone density that is helpful as a diagnostic tool (Shapurian et al, 2006). This rationale was appreciated and adopted in previous studies as well as in our study (Shapurian et al, 2006;Schreiber et al, 2011;Sogo et al, 2012). Therefore, the qualitative assessment of the newly regenerated bone tissue depended on the histological examination of the decalcified samples combined with the average density/gray values (CT numbers) measured in HU for the samples before decalcification.…”

Variability of dental cone beam CT grey values for density estimations

“…The main use for density estimations would be in the evaluation of bone tissue before implant placement. Different studies have investigated bone quality based on HU from MSCT scans from implant patients [3,[23][24][25][26][27]. However, there are different terms currently used in literature to denote bone tissue attributes, and there is no standardised definition for terms like bone quantity and quality [28].…”

“…Current-generation CBCT scanners allow for linear and volumetric measurements at potential implant sites in the jaw bones at submillimetre accuracy [7][8][9][10][11]. However, there are contradictory reports as to whether CBCT can be used for bone tissue evaluations by means of density estimations [10][11][12][13][14][15][16][17][18][19][20][21][22], similar to the use of Hounsfield units (HU) in MSCT which can be related to absolute density [3,[23][24][25][26][27]. Although most CBCT devices use 12-bit images (i.e.…”

A New Transalveolar Sinus Lift Procedure for Single Implant Placement: The Ebanist Technique. A Technical Description and Case Series

“…Poor bone quality and quantity in posterior maxilla are considered the reasons for the decreased primary implant stability and, therefore, the increased failure rates [15]. …”