Can gray values derived from CT and cone beam CT estimate new bone formation? An in vivo study

Bastami, Farshid; Shahab, Shahriar; Parsa, Azin; Abbas, Fatemeh Mashhadi; Kooshki, Mohammad Hadi Noori; Namdari, Mahshid; Lisar, Hamidreza Azimi; Rafiei, Tohid; Fahimipour, Farahnaz; Salehi, Majid; Jafari, Maissa

doi:10.1007/s10006-017-0657-7

Cited by 8 publications

(4 citation statements)

References 33 publications

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“…The mean gray values obtained by a CBCT scan and HUs in a CT scan show a strong correlation [33]. Contrary to results of the present investigation, the study by Batsami et al showed that the gray values from a CBCT scan of rabbits can be used to assess bone quality and the amount of new bone formation before implant placement [34]. Gonzáles-Garcia and Monje found a significant correlation between the gray values of a CBCT scan and the bone density in biopsies of the upper jaw.…”

Section: Measurements Of Bone Densitycontrasting

confidence: 75%

Associations among Primary Stability, Histomorphometric Findings, and Bone Density: A Prospective Randomized Study after Alveolar Ridge Preservation with a Collagen Cone

et al. 2020

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Background: The objective of this investigation was to examine whether determination of bone density (BD) with a cone beam computed tomography (CBCT) scan could help predict the primary stability (PS) of the implants and to investigate whether associations between the histomorphometric findings and the CBCT scan could be observed. Materials and methods: In this randomized clinical study, the efficacy of alveolar ridge preservation (ARP) with a combination of a collagen cone and a collagen membrane procedure after tooth extraction was investigated. CBCT scans were obtained after a healing period of 8 (±1) weeks. Subsequently, the CBCT scans were evaluated in terms of BD at different heights of the former socket. Eleven (±1) weeks after tooth extraction, implant placement was performed and PS was measured with resonance frequency analysis. Potential associations among the radiologically measured BD, the histomorphometric results, and the PS were analyzed. Results: No direct association was observed between the radiologically determined BD and the histomorphometric findings. No significant associations could be found between the BD and the PS. Conclusion: No significant associations were observed among the BD determined by the CBCT, the histomorphometric findings, and the PS.

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Section: Measurements Of Bone Densitycontrasting

confidence: 75%

Associations among Primary Stability, Histomorphometric Findings, and Bone Density: A Prospective Randomized Study after Alveolar Ridge Preservation with a Collagen Cone

et al. 2020

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“…The validity of CBCT bone measurements as an index of bone quality was questioned (Harris et al, ), but its reliability to objectively assess the density of bone has not been properly studied in human clinics (Gonzalez‐Garcia & Monje, ). A recent published in vivo study reported Hounsfield unit derived from computed tomography (HU/CT) and gray value derived from cone beam computed tomography (GV/CBCT) may be considered as fairly good predictors for assessment of the amount of new bone formation following bone reconstruction surgeries (Bastami et al, ). The finding was corroborated by a study that was evaluating the variability of intensity values in CBCT imaging compared with MSCT HU units in order to assess the reliability of density assessments in bone biopsies of the maxillary bones (Gonzalez‐Garcia & Monje, ).…”

Section: Discussionmentioning

confidence: 99%

A novel semiautomatic segmentation protocol to evaluate guided bone regeneration outcomes: A pilot randomized, controlled clinical trial

Qiao

et al. 2019

Clinical Oral Implants Res

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Objectives:The aims of this study were to (a) present a novel morphological contour interpolation (MCI) algorithm based method to evaluate grafted bone alterations following guided bone regeneration (GBR), (b) compare clinical and radiological outcomes of GBR with two different collagen membranes. Materials and methods:The data were retrieved from an ongoing randomized controlled trial. Patients were randomly allocated into two groups: (a) control group (CG):Bio-Gide (b) test group (TG): bovine dermis-derived collagen membrane. Cone beam computed tomography examinations were performed 1 week (T0) and 6 months after surgery (T1). PES/WES at T1, grafted bone volume and density changes from T0 to T1 were recorded.Results: Thirty-six patients (16/20 in test/control group, respectively) were enrolled in the present study. Excellent inter-observer reliability (ICC ≥ 0.97) was revealed for repeated measurements using this method. Significant volumetric reduction of grafted bone were found in both groups (test group: from 0.60 to 0.39 cm 3 , p < 0.01; control group: from 0.54 to 0.31 cm 3 , p < 0.01). Mean bone density (gray-scale values) significantly increased from 305.12 to 456.69 in CG (p < 0.01). In TG, it slightly increased from 304.75 to 393.27 (p = 0.25). The mean PES/WES values were 13.84 (6.62/7.22) and 13.90 (6.70/7.20) for TG and CG, respectively. As for inter-group comparison, no significant differences of grafted bone volume change, density change and PES/WES were found between two groups. Conclusion:Within the limitations of this study, the novel MCI-based method is a reproducible tool to segment and visualize changes of grafted bone in 3D.Furthermore, both collagen membranes could be used as a barrier membrane for GBR in humans. K E Y W O R D Scone beam computed tomography, guided bone regeneration, morphological contour interpolation, segmentation | 345 LI et aL.

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“…Existe controversia respecto de la evaluación de hueso por medio de la TCHC, que utiliza una escala de grises en comparación con las unidades Hounsfield de la TCM. La escala de grises no permite una conversión directa a unidades Hounsfield, pero sí establecer una relación lineal entre ambas para la evaluación de las diferentes densidades de los tejidos en una TCHC, así como para mediciones que evalúan la formación de hueso ( [61][62][63] ).…”

Section: Tchc De La Estructura Craneofacial En Neurología Y Neurocirugíaunclassified

Aplicaciones de la tomografía computarizada de haz cónico de la estructura craneofacial en especialidades médicas. Una revisión

Muñoz-Galván

Fiori-Chíncaro²,

Agudelo-Botero³

2022

Rev Cient Odontol (Lima)

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La tomografía computarizada de haz cónico (TCHC) de la estructura craneofacial ha demostrado su utilidad en el área odontológica durante las últimas décadas, por lo que se ha convertido en una herramienta fundamental para el diagnóstico, la planeación y la evaluación del tratamiento. Aunque no fue desarrollada para uso exclusivo en odontología como comúnmente se considera, es utilizada en otras áreas como la medicina. Específicamente, se emplea en el área de cabeza y el cuello, donde interactúan diferentes especialidades médicas, y a la vez estas interactúan con especialidades odontológicas; por tanto, conocer las ventajas de la TCHC sobre diferentes tecnologías imagenológicas en el área medica es necesario. El propósito de esta revisión fue describir las aplicaciones de observación, diagnostico, planeación y evolución de tratamientos mediante la TCHC maxilofacial en diferentes especialidades médicas. Este trabajo destaca el uso de la TCHC en las diferentes aplicaciones médicas y resalta dónde radica su mayor utilidad en comparación con otras tecnologías.

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Can gray values derived from CT and cone beam CT estimate new bone formation? An in vivo study

Abstract: According to the results, both HU/CT and GV/CBCT can be considered as fairly good predictors for assessment of the amount of NBF following bone reconstruction surgeries.

Cited by 8 publications

References 33 publications

Associations among Primary Stability, Histomorphometric Findings, and Bone Density: A Prospective Randomized Study after Alveolar Ridge Preservation with a Collagen Cone

Associations among Primary Stability, Histomorphometric Findings, and Bone Density: A Prospective Randomized Study after Alveolar Ridge Preservation with a Collagen Cone

A novel semiautomatic segmentation protocol to evaluate guided bone regeneration outcomes: A pilot randomized, controlled clinical trial

Aplicaciones de la tomografía computarizada de haz cónico de la estructura craneofacial en especialidades médicas. Una revisión

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