The reliability of cone‐beam computed tomography to assess bone density at dental implant recipient sites: a histomorphometric analysis by micro‐<scp>CT</scp>

González-García, Raúl; Monje, Florencio

doi:10.1111/j.1600-0501.2011.02390.x

Cited by 120 publications

(143 citation statements)

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“…Shapurian et al 16 reported that knowledge of the Hounsfield value as a quantitative measurement of bone density can be helpful as a diagnostic tool. Gonzales-Garcia and Monje 27 conducted a study on the reliability of cone-beam computed tomography (CBCT) for evaluating radiographic bone density. They claimed that CBCT has a strong positive correlation with micro-CT and is a reliable tool for determining bone density.…”

Section: Sem Analysesmentioning

confidence: 99%

Bone healing after biodegradable mini-plate fixation

et al. 2016

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PURPOSE:To compare bone healing in mandibular vertical body osteotomies (MVBO) after fixation with a resorbable 2.0mm-profile fixation system in the first and third postoperative months in rabbits. METHODS:Twenty hemimandibles of ten rabbits were divided into two groups according to duration of resorbable fixation-one or three months. The MVBOs were performed and one four-hole, resorbable, 2.0mm mini-plate fixation system was used on each side.The computed tomography (CT) scans, scanning electron microscopy (SEM), and histomorphometric outcomes of groups I and II were compared.RESULTS: Significant differences were found between the one-and three-month assessments in terms of newly formed bone ratio values (p<0.05). There was more new bone formation at the third month on both the CT and histomorphometric examinations. A better adaptation of the bone tissues to the resorbable mini-plate and screws was observed on SEM at three months. CONCLUSION:The resorbable mini-plates provided a fixation stable enough to allow immediate oral alimentation and callus formation in both groups.

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Section: Sem Analysesmentioning

confidence: 99%

Bone healing after biodegradable mini-plate fixation

et al. 2016

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“…28 Similar measurements from CBCT scans, even if dependent on the specific device being used, still correlate with histomorphometric bone density and primary implant stability. [29][30][31][32] However, bone density may show ample variations even in contiguous points of the maxillary bone, and this raises the question of whether absolute or relative bone density values assessed on preoperative CTs or CBCTs will correspond to the ones at the actual placement sites, since these may not overlap perfectly with the ones preplanned on the digital scans. 12 Even using stereolithographic guides for implant placement may not solve this issue since significant deviations from the preplanned placement positions may still be observed, the greatest errors being found when patients move during the CT scans, resulting in significant divergence at the level of the head and apex of the implants, and also in angular deviation.…”

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An Intraoperative Site-specific Bone Density Device: A Pilot Test Case

Arosio

Moschioni

Banfi

et al. 2015

The Journal of Contemporary Dental Practice

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Aim: This paper reports a case of all-on-four rehabilitation where bone density at implant sites was assessed both through preoperative computed tomographic (CT) scans and using a micromotor working as an intraoperative bone density measurement device.Background: Implant-supported rehabilitation is a predictable treatment option for tooth replacement whose success depends on the clinician's experience, the implant characteristics and location and patient-related factors. Among the latter, bone density is a determinant for the achievement of primary implant stability and, eventually, for implant success. The ability to measure bone density at the placement site before implant insertion could be important in the clinical setting.Case description: A patient complaining of masticatory impairment was presented with a plan calling for extraction of all her compromised teeth, followed by implant rehabilitation. A week before surgery, she underwent CT examination, and the bone density on the CT scans was measured. When the implant osteotomies were created, the bone density was again measured with a micromotor endowed with an instantaneous torque-measuring system. The implant placement protocols were adapted for each implant, according to the intraoperative measurements, and the patient was rehabilitated following an all-on-four immediate loading protocol. An Conclusion:The bone density device provided valuable information beyond that obtained from CT scans, allowing for site-specific, intraoperative assessment of bone density immediately before implant placement and an estimation of primary stability just after implant insertion.Clinical significance: Measuring jaw-bone density could help clinicians to select implant-placement protocols and loading strategies based on site-specific bone features.

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“…Cone beam computed tomography (CBCT) was originally developed in the early 1980s for angiography [16,17,36,41,53,69], and more than a decade later it was applied to dentomaxillofacial diagnostics. The main advantages of CBCT are relatively high-resolution acquisition and, compared with conventional CT, lower radiation doses with smaller and less expensive equipment [12,16,17,36,[44][45][46][47][48][49]53,69,70,79].As was discussed in Section 5.1, from a technical point of view, the limitation of image quality by dental CBCT technology is dependent on the increased X-ray scatter. This not only increases patient dose but also is a principal contributor to reduced contrast resolution and increased noise in CBCT images [37,46,53,69,71], therefore influencing the density values [13,16,17,29,30,36,37,39,[47][48][49][50]53,66,69,70].…”

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“…D: Square form basic projection image of the pyramid shape beam instrument (iCAT Classic). The 3D reconstructed image is cylindrically shaped [32,36].The main advantages of dental CBCT are relatively high-resolution acquisition and, compared with conventional CT, lower radiation doses with smaller and less-expensive equipment [11,12,16,17,32,36,[44][45][46][47][48][49][50][51].The next milestone in development was in 2003, when J. Morita Mfg Corporation produced equipment with relatively small volume. In this instrument the patient was already in a seated position (Figure 15 B).…”

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Examination of Grey Value Accuracy and Improvement of Image Quality in Cone Beam Computed Tomography (CBCT)

Plachtovics

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The WARM operation mode represents that the CBCT machine was switched on for at least two hours before the scan but no detector calibration was performed. WARM+C WARM+C scan protocol is consistent with the cone beam computed tomography scan with the complete calibration sequence after the warming-up period. The two-hour warming-up period preceded the calibration process. WUP warming-up period 2D 2 dimensional 3D 3 dimensional iv Galen's principal interest was in human anatomy but, from about 150 BC [2], Roman law had prohibited the dissection of human cadavers. Because of this restriction, Galen performed anatomical dissections on living (vivisection) and dead animals, mostly focusing on pigs and primates [3]. This work was useful because the anatomical structures of these animals usually closely mirror those of humans. Galen clarified the anatomy of the trachea, and was the first to demonstrate that the larynx generates the voice [4,5]. In one experiment, Galen used bellows to inflate the lungs of a dead animal. In his work De motu musculorum, Galen explained the difference between motor and sensory nerves, discussed the concept of muscle tone, and explained the difference between agonists and antagonists [5,6].Andreas Vesalius ( This environment, which lasted from the second century (Galenius) to the sixteenth century (Vesalius), developed a strong desire to have the ability to see inside the human body [7]. Development of medical imagingDuring many centuries the only way to visualize the inside of the human body was through dissection. With technical development, scientists had started to investigate the inside of the human body without its opening. In 1881, Alexander Graham Bell attempted to use magnets and sound waves to discover the location of the bullet that eventually killed U.S.President James A. Garfield [8].After a lengthy period, during scientific experiments with various types of vacuum tube equipment, the discovery of X-rays in 1895, by the Bavarian physicist Conrad Röntgen, represented a major breakthrough (Figure 3 A). When X-rays were finally discovered, they found their way to medical applications within months [9]. B C A 3The original discovery by Röntgen, at the Physical Institute, Julius-Maximilian University, Würzburg, Germany, is recorded to be on 8 November 1895 [9][10][11][12][13][14][15][16][17]. During the discovery, he speculated that a new kind of ray might be responsible for the observation.Since 8 th November was a Friday, instead of relaxing over the weekend, Röntgen took advantage of the time to repeat his experiments. In the following weeks he investigated many properties of the new rays he had temporarily termed 'X-ray'. In fact, he virtually lived in his laboratory during that time. The new X-ray is called the 'Röntgen ray' in many languages [18]. Nearly two weeks after his discovery, he took the very first picture using X-rays of his wife Anna Bertha's hand. When she saw her skeleton she exclaimed 'I have seen my death!' (Figure 3 B and C) [10,18]. Röntgen receive the fir...

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The reliability of cone‐beam computed tomography to assess bone density at dental implant recipient sites: a histomorphometric analysis by micro‐CT

Abstract: RBD assessed by CBCT has a strong positive correlation with BV/TV assessed by micro-CT at the site of dental implants in the maxillary bones. Pre-operative estimation of density values by CBCT is a reliable tool to objectively determine bone density.

Cited by 120 publications

References 23 publications

Bone healing after biodegradable mini-plate fixation

Bone healing after biodegradable mini-plate fixation

An Intraoperative Site-specific Bone Density Device: A Pilot Test Case

Examination of Grey Value Accuracy and Improvement of Image Quality in Cone Beam Computed Tomography (CBCT)

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