Clinical Assessment of Bone Quality at Implant Site using CBCT and Hounsfield Unit

Singh, Nidhi; Sonkesriya, Subhash; Bagewadi, Shivanand B; Anwar, Sana; Abraham, Sajith; Parihar, Anuj Singh; Mohammed, Azhar

doi:10.4103/jpbs.jpbs_109_23

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…Convert the raw values of pixel intensities to Hounsfield units (HU) using the linear transformation of (1) [26].…”

Section: Acquisition Of Pulmonary Three-dimensional Point Cloudmentioning

confidence: 99%

Motility Analysis of Diaphragm in Patients With Chronic Pulmonary Lung Disease Based on Computed Tomography Technique

Yu,

Nnamdi,

Seo

et al. 2023

IEEE Access

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The diaphragm plays a crucial role in respiration, and diaphragm dysfunction is common in COPD, contributing to worsening symptoms and higher mortality rates. Many methods have been implemented to evaluate the function of the diaphragm, but each comes with its unique set of limitations. To overcome this challenge, a novel approach was introduced to assess diaphragm function in patients with chronic obstructive pulmonary disease (COPD) using thoracic computed tomography scans. This novel approach involves generating a simulation of the diaphragm from lung DICOM slice images and calculating the dynamic change in respiratory motion by quantifying the difference in the simulated diaphragm mesh area during inhalation and exhalation. The experimental design incorporates various image processing algorithms, computational geometry algorithms, and a surface fitting algorithm optimized to minimize the potential sources of error. When the proposed technique was applied to detect diaphragmatic dysfunction in patients with COPD, the results of the Pearson correlation analysis showed a strong relationship between the variables ratio of exhalation to inhalation surface and average z-value difference inhalation and exhalation surfaces, with a coefficient of 0.731. The results suggest that the proposed technique is highly accurate and beneficial in scenarios where diaphragm function is essential, such as respiratory disorders, neuromuscular diseases like Amyotrophic Lateral Sclerosis or muscular dystrophy, spinal cord injuries, and conditions such as sleep apnea. By providing specific numerical data on sensitivity and specificity, this approach offers a quantitative evaluation of its effectiveness in detecting diaphragmatic dysfunction in patients with COPD. In conclusion, the proposed approach is currently semi-automated, however, future study may investigate fully automated approaches using this technique.INDEX TERMS Chronic obstructive pulmonary disease, computed tomography, diaphragm segmentation, digital image processing, medical image computing.

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“…Convert the raw values of pixel intensities to Hounsfield units (HU) using the linear transformation of (1) [26].…”

Section: Acquisition Of Pulmonary Three-dimensional Point Cloudmentioning

confidence: 99%

Motility Analysis of Diaphragm in Patients With Chronic Pulmonary Lung Disease Based on Computed Tomography Technique

Yu,

Nnamdi,

Seo

et al. 2023

IEEE Access

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Use of autologous tooth-derived material as a graft in the post-extraction socket. Split-mouth study with radiological and histological analysis

López Sacristán,

del Canto Pingarrón,

Alobera Gracia

et al. 2024

BMC Oral Health

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Background The healing process after tooth removal involves bone remodelling which implies some loss of alveolar bone volume. Among materials proposed for minimising this remodelling and preserving the bone, autologous dental tissue is a promising option, but more data are needed. In this context, we evaluated size and density changes using cone beam computed tomography in autologous dental material (ADM)-preserved sockets compared to controls, and assessed biological responses by histological analysis. Methods A split-mouth study was conducted including 22 patients, who underwent removal of ≥ 2 single-rooted teeth with intact sockets, assigning one socket to the experimental group which received ADM for alveolar preservation and another to the control group, which only underwent blood clot stabilisation. Cone beam computed tomography was performed postoperatively (week 0) and at weeks 8 and 16 to assess socket size and bone density. Histological analysis was carried out on trephine biopsies taken (Ø4 × 4.5 mm) from the experimental group. Results Less horizontal shrinkage was observed in the ADM group, especially at week 16 considering the group-by-time interaction for the following variables: difference in height between the lingual and buccal alveolar crests (-1.00; p < .01; 95% CI: -0.28 – -1.73), and half-widths, measured as the distance from the long axis of the missing tooth to the buccal alveolar crest at 1 mm (-0.61; p < .01; 95% CI: -0.18 – -1.04) and at 3 mm (-0.56; p < .01; 95% CI: -0.15 – -0.97) below the crest, with mean decreases of 1.07 and 2.14 mm in height difference, 0.66 and 1.32 mm in half-width at 1 mm and 0.43 and 1.02 mm in half-width at 3 mm in ADM and control groups respectively. Densitometry analysis showed higher bone densities in Hounsfield units in the ADM group considering all factors analysed regardless of time point and socket third (coronal, middle, or apical). Histologically, there were no signs of inflammation or foreign body reaction, and dentin particles were surrounded by and in close contact with bone tissue. Conclusion These results add to the evidence that dentin can be used successfully as a material for alveolar socket preservation, given its desirable mechanical and biological properties, and warrant larger studies.

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Assessment of Bone Density in Edentulous Maxillae Using Cone Beam Computed Tomography (Cbct)

Mansuy,

Saliba-Serre,

Ruquet

et al. 2024

Preprint

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Clinical Assessment of Bone Quality at Implant Site using CBCT and Hounsfield Unit

Cited by 3 publications

References 4 publications

Motility Analysis of Diaphragm in Patients With Chronic Pulmonary Lung Disease Based on Computed Tomography Technique

Motility Analysis of Diaphragm in Patients With Chronic Pulmonary Lung Disease Based on Computed Tomography Technique

Use of autologous tooth-derived material as a graft in the post-extraction socket. Split-mouth study with radiological and histological analysis

Assessment of Bone Density in Edentulous Maxillae Using Cone Beam Computed Tomography (Cbct)

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