Variations in bone density at dental implant sites in different regions of the jawbone

Abstract

The survival rate of dental implants is markedly influenced by the quality of the bone into which they are placed. The purpose of this study was to determine the trabecular bone density at potential dental implant sites in different regions of the Chinese jawbone using computed tomography (CT) images. One hundred and fifty-four potential implant sites (15 in the anterior mandible, 47 in the anterior maxilla, 55 in the posterior mandible, and 37 in the posterior maxilla) were selected from the jawbones of 62 humans. The data were subjected to statistical analysis to determine any correlation between bone density (in Hounsfield units, HU) and jawbone region using the Kruskal-Wallis test. The bone densities in the four regions decreased in the following order: anterior mandible (530 +/- 161 HU, mean +/- s.d.) approximately equal anterior maxilla (516 +/- 132 HU) > posterior mandible (359 +/- 150 HU) approximately equal posterior maxilla (332 +/- 136 HU). The CT data demonstrate that trabecular bone density varies markedly with potential implant site in the anterior and posterior regions of the maxilla and mandible. These findings may provide the clinician with guidelines for dental implant surgical procedures (i.e., to determine whether a one-stage or a two-stage protocol is required).

Bone Forming Potential of An-Organic Bovine Bone Graft: A Cone Beam CT study

“…Although, our the recorded bone density is similar to that of a study carried out by Fuh et al, [25]. Carried out in an Asian population.…”

Digital subtraction radiography evaluation of longitudinal bone density changes around immediate loading implants: a pilot study

“…In addition, future SR studies need to explore the influence of bone density on the primary implant stability and variations according to sitespecific regions of the maxilla and mandible, as demonstrated previously in CT clinical studies. [25][26][27][28] In conclusion, this study showed that the IML protocol induced mineral bone gain around single-tooth implants after the first year under function for cases with favourable bone conditions and a decrease in bone density around conventional loading implants. In addition, no effect of implant surface was observed on longitudinal assessment of the pixel grey values around the implants.…”

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].…”

“…They consist of small PMMA cylinders (diameter 3.5 cm, height 2.0 cm) containing a central rod of 1.0 cm diameter. Five types of materials were used for the central rod: air, aluminium and hydroxyapatite (HA) in three different concentrations (50, 100 and 200 mg cm 23 ). The sixth insert contained homogeneous PMMA.…”

“…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.…”