Estimation of optical density of bone tissue radiograms with laser densitometry

2001 ◽  
Author(s):  
Jan Rowinski ◽  
Wojciech Glinkowski ◽  
Pawel Glebowski
Keyword(s):  
Bone Tissue ◽  
Optical Density ◽  
Laser Densitometry

scholarly journals Comparative Evaluation of the Radiopacity of Bone Graft Materials used in Dentistry

2017 ◽  
Vol 7 (3) ◽  
pp. 150-155 ◽  
Author(s):  
Emine S Kursun-Çakmak ◽  
Nihat Akbulut ◽  
Dogan D Öztas
Keyword(s):  
Statistical Analysis ◽  
Bone Graft ◽  
Bone Tissue ◽  
Optical Density ◽  
Comparative Evaluation ◽  
Statistical Significance ◽  
Radiographic Images ◽  
X Ray ◽  
Materials Used

ABSTRACT Introduction Ample radiopacity in order to distinguish from the surrounding tissues is a desirable property of dental graft materials. A total of 15 bone graft materials’ (BGMs) opacities were analyzed in this study. Materials and methods Graft materials were placed in the implant cavity (5 × 10 mm) in cadaver's mandible respectively. Cavity was exposed by using periapical film and a dental X-ray machine at 70 kVp and 8 mA. The optical density of the radiographic images was measured with a transmission densitometer. One-way analysis of variance (ANOVA) was conducted for statistical analysis. Results Among the materials tested, the most radiolucent bone grafts were Grafton and Allogenix with a statistical significance of p ≥ 0.05. 4Bone and Bego Oss exhibited the highest radiopacity with a statistical significance of p ≥ 0.05. Inadequate radiopacity of the dental graft materials may lead to confusion among clinicians in the radiographical follow-up. Among 15 BGMs tested, only three had higher density than bone tissue. Conclusion The radiopacity of the BGM was found to be higher than bone at only three of them. How to cite this article Kursun-Çakmak ES, Akbulut N, Öztas DD. Comparative Evaluation of the Radiopacity of Bone Graft Materials used in Dentistry. J Contemp Dent 2017;7(3):150-155.

scholarly journals Morphofunctional Characteristic of Bone Tissue of Alveolar Processes (Parts) in Conditions of Chronic Odontogenic Infection

2018 ◽  
Vol 7 (2) ◽  
pp. 39-43
Author(s):  
V. V. Lebedyantsev ◽  
N. N. Shevlyuk ◽  
T. V. Lebedyantseva ◽  
I. A. Khanov
Keyword(s):  
Bone Tissue ◽  
Optical Density ◽  
Alveolar Bone ◽  
Control Group ◽  
Alveolar Process ◽  
Tissue Sections ◽  
Osteoclastic Resorption ◽  
Choice Of Treatment ◽  
Odontogenic Foci ◽  
Hematoxylin Eosin

Assessment of the condition of the alveolar bone is important for the choice of treatment methods for many types of pathology of the dentoalveolar system. The aim of the study was to identify morphofunctional disorders and changes in the optical density of bone tissue of the alveolar process of the maxilla and the alveolar part of the mandible arising from the effects of chronic odontogenic foci of infection. Material and methods. Histological examination of the edges of the alveoli of the removed teeth was carried out in 40 patients with chronic forms of periodontitis. Bony fragments were removed on medical reasons for the prevention of postextraction pain. Decalcification was carried out in Trilon B solution, microtome tissue sections were stained with hematoxylin-eosin. The density of bone tissue was determined on the intraoral radiovisiograms of the removed teeth and intact teeth in 80 persons of the control group. Results. It is established that with chronic forms of periodontitis under the periosteum of the alveolar processes (parts), osteoclastic resorption occurs either in the plane of the bone or with the formation of gauchepic lacunae. The channels of the osteons and the folkman channels widen, and in their circles there are also foci of resorption. Appear pycnosis of osteocytes and extensive areas with empty and dilated osseous lacunae. In the zones of osteolysis, either connective or coarse-fibrous bone tissue is formed. The optical density of bone tissue in patients is significantly less than in individuals with intact teeth. Conclusions. Toxins from chronic odontogenic foci of infection activate the processes of bone resorption of the alveolar process (part) of the jaws and inhibit reparative osteogenesis. The resulting rarefaction of bone tissue leads to a decrease in its optical density.

Optical density of bone tissue in the dynamics of therapy of professionally caused osteopathies of the shoulder joint

2020 ◽  
pp. 620-620
Author(s):  
V. N. Druzhinin ◽  
V. G. Suvorov ◽  
A. E. Shelekhova
Keyword(s):  
Bone Tissue ◽  
Optical Density ◽  
Bone Mineral ◽  
Shoulder Joint ◽  
Primary Diagnosis ◽  
Density Index ◽  
Optical Density Index

Optical density index can be a criterion of bone mineral saturation, both at the stage of primary diagnosis and in the dynamics of observation of patients with shoulder periarthrosis and osteoarthritis of the shoulder joint.

scholarly journals Measurements of the optical density of the alveolar process bone tissue of the jaws during periodontal diseases with the use of three-dimensional computed tomography

2012 ◽  
Vol 93 (4) ◽  
pp. 660-662 ◽  
Author(s):  
N N Bondarenko ◽  
E V Balakhontseva
Keyword(s):  
Periodontal Disease ◽  
Bone Tissue ◽  
Optical Density ◽  
Periodontal Diseases ◽  
Three Dimensional ◽  
World Health ◽  
Alveolar Process ◽  
Treatment Needs ◽  
Moderate Severity ◽  
Periodontal Tissues

Aim. To determine the optical density of the alveolar process bone tissue in normal conditions and during various forms of periodontal pathology. Methods. With the use of clinical and radiographic methods examined were 120 patients (with a healthy periodontium, with chronic generalized catarrhal gingivitis of moderate severity, with chronic periodontitis of a mild, moderate and severe degree). On the three-dimensional computer tomograms in each group of patients determined was the optical density of the alveolar process bone tissue from the medial and distal sides of the root of the following teeth 1.6, 1.7, 2.7, 2.6, 3.6, 3.7, 4.7, 4.6, 1.1, 3.1 (the teeth numbers have been recommended by the World Health Organization in order to determine the index of treatment needs of the periodontal disease), and studied were its changes depending on the severity of periodontal disease. Statistical analysis was performed using computer programs «Microsoft Excel», «Biostatistica». Results. In periodontal disease noted was a reduction in the optical density of bone tissue of the alveolar processes of the jaws with a firm relashionship with the severity of disease. In chronic generalized catarrhal gingivitis of moderate severity the optical bone density ranged from 40.445±1.264 to 633.744±5.226 arbitrary units, in mild forms of chronic generalized periodontitis - from -119.664±1.511 to 344.972±4.019, in moderate forms of chronic generalized periodontitis - from -232.589±3.088 to 203.841±1.604, in severe chronic generalized periodontitis - from -464.080±2.398 to -53.991±1.435 arbitrary units. Conclusion. Changes in optical density of bone tissue of the alveolar process of the jaws is an objective criterion for evaluating the status of periodontal tissues, an important diagnostic feature, which also makes it possible to predict the course of the disease and monitor the effectiveness of treatment.

scholarly journals MICROSCOPIC DETERMINATION OF BONE PHOSPHORUS BY QUANTITATIVE AUTORADIOGRAPHY OF NEUTRON-ACTIVATED SECTIONS

1965 ◽  
Vol 24 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Jacques Vincent ◽  
Stanislas Haumont ◽  
Joseph Roels
Keyword(s):  
Cortical Bone ◽  
Bone Tissue ◽  
Mineral Composition ◽  
Optical Density ◽  
Absorption Curve ◽  
Thermal Neutrons ◽  
Γ Rays ◽  
Γ Ray ◽  
Ca:P Ratio

Longitudinal sections of human cortical bone were submitted to thermal neutrons. γ-ray spectra were recorded repeatedly during 15 days following irradiation. They showed that Na24 is predominant as early as 3 hours after activation and that all the γ-emitters have decayed on the 15th day. When the γ-rays have disappeared, ß-rays are still produced by the sections. It was proved by the absorption curve in aluminium that all these ß-rays are issued from the P32 induced in the sections by activation of P31. Therefore autoradiograms registered 15 days after activation reveal the distribution of P32 in the sections. γ-ray spectra and ß-ray absorption curves of neutron activated sections of ivory demonstrated a mineral composition similar to that of bone. Autoradiograms of ivory sections activated for various times were used to establish the relation between the optical density of the autoradiograms and the radioactivity in P32. When the bone autoradiograms are compared with the ivory standards of known radioactivity, the optical densities of single osteons (Haversian systems), can be related to their phosphorus contents. Autoradiograms and microradiograms of the same sections were examined side by side. The least calcified osteons, that contain 80 per cent of the calcium of the fully calcified osteons, also contain about 80 per cent of the phosphorus of the fully mineralized osteons. It is concluded that the Ca:P ratio remains constant while mineralization of bone tissue is being completed.

scholarly journals STUDY OF THE ANATOMY OF THE MENTAL FORAMEN USING CONE-BEAM COMPUTER TOMOGRAPHY

2020 ◽  
Vol 16 (3) ◽  
pp. 90-95
Author(s):  
Irina Shelegova ◽  
Artur Heigetyan ◽  
Dar'ya Vazhenina ◽  
Natal'ya Nurieva
Keyword(s):  
Computed Tomography ◽  
Bone Tissue ◽  
Optical Density ◽  
Cone Beam Computed Tomography ◽  
Anatomical Variation ◽  
Mental Foramen ◽  
Cone Beam ◽  
Cortical Plate ◽  
Mineral Density ◽  
The Right

Subject. The article discusses the possibilities of cone-beam computed tomography in the study of the anatomy of the mental foramen: size, shape, topography, as well as the optical density of bone tissue at the mental foramen. The goal is to investigate the size, shape and topography of the mental foramen, as well as the optical density of bone tissue in it using cone-beam computed tomography. Methodology. The computed tomograms of the lower jaws of 26 patients were analyzed, according to which the vertical and horizontal dimensions of the mental openings were measured on the right and left, the number and sizes of additional mental openings, their location according to the Tebo and Telford classification, and the bone mineral density under the mental opening were determined. Statistical analysis was carried out using Microsoft Excel, Windows 9. Results. The resulting average dimensions of the right (4.01x3.93 mm) and left (3.81x3.95) mental holes confirm the results of more extensive studies done earlier. In the first case (1.9 %), an anatomical variation of the mental opening was revealed: 3 holes with dimensions 2.1×2.1 mm, 2.0×0.9, and 1.9×2.4. The symmetrical location of the chin foramen was found in 15 patients (57.7 %). In most cases, types III (25 %) and IV (53.84 %) of the location of the mental opening were identified. The average optical density of bone tissue under the mental foramen on the right side was 1618.9±145.1 HU, on the left ― 1571.64±159.64. There were no significant differences in the optical density of bone tissue for types II―IV of the location of the mental foramen. Conclusions. A significant variability in the topography of the mental foramen was revealed, in this regard, methods of mental anesthesia with a personalized approach, for example, the method of anesthesia of the intraosseous part of the chin nerve, are becoming relevant (authors Rabinovich S.A., Vasiliev Yu.L., Tsybulkin A.G.). High values of the optical density of bone tissue at the mental foramen confirm the ineffectiveness of diffusion of anesthetics through the cortical plate.

scholarly journals Optical bone density as a prognostic risk factor for the development of medication-related osteonecrosis of the jaw in patients with bone metastases

2020 ◽  
Vol 26 (4) ◽  
pp. 539-543
Author(s):  
N.G. Vinogradova ◽  
◽  
L.V. Solomatina ◽  
M.P. Kharitonova ◽  
K.V. L’vov ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Optical Density ◽  
Central City ◽  
Maxillofacial Surgery ◽  
Osteonecrosis Of The Jaw ◽  
Qualitative Assessment ◽  
City Hospital ◽  
Hounsfield Units ◽  
Lower Jaw

Introduction Medication-related osteonecrosis of the jaw (MRONJ) is a complication associated with the intake of osteomodifying agents (bisphosphonates, denosumab). At present, its frequency, according to various authors, may reach from one to 10 cases per 100 subjects. The literature describes the main factors in the pathogenesis of the disease. The prognostic signs of its development, which would allow timely diagnosis and prevention of the disease, remain not fully understood. Materials and methods The retrospective analysis was based on the results of a study of 52 patients with MRONJ who were treated at the Department for Maxillofacial Surgery at the Central City Hospital No. 23 in Yekaterinburg from January 2015 to December 2019 Multispiral computed tomography was used for visualization, quantitative and qualitative assessment of the jaw bone tissue. The optical density of the spongy substance was determined in Hounsfield units (HU) on the side opposite to the lesion. Results The analysis of the results of optical density showed that D1 bone type was not detected in any patient. We observed type D2 using CT in 5 cases in the central part of the lower jaw (9.61 %), in 9 cases in the central part of the upper jaw (17.3 %), as well as in the area of the angle of the lower jaw on 6 CT-scans (11.53 %). D3 and D4 bone types prevailed, D5 bone type was less common. The optical density of the structures under study was in the range from 229.8 ± 56.6 to 534.8 ± 155.4 HU. Thus, patients receiving osteomodifying therapy with bone types D3, D4, D5 are more at risk of developing MRONJ than patients with bone types D1 and D2. Conclusion It is advisable to include a mandatory MSCT with classification of bone types according to Misch and determine optical density of bone tissue in the examination protocols of such patients.

scholarly journals COMPUTED TOMOGRAPHY ATTENUATION OF THE UPPER AND LOWER JAW BONE TISSUE IN PATIENTS WITH DIABETES MELLITUS ASSESSED BY DENTAL COMPUTED TOMOGRAPHY

2021 ◽  
Vol 17 (2) ◽  
pp. 148-155
Author(s):  
Natalia Prozorova ◽  
Roman Fadeyev ◽  
Viktor Veber ◽  
Marina Chibisova ◽  
Irina Prozorova ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Computed Tomography ◽  
Bone Tissue ◽  
Optical Density ◽  
Bone Destruction ◽  
Lower Jaw ◽  
Patients With Diabetes ◽  
Qualitative Measure ◽  
Dental Computed Tomography

Type 1 and 2 diabetes are associated with deteriorated bone remodeling due to microangiopathy and acidosis, as well as non-fermentative glycosylation of bone proteins re-sulting in the apoptosis of osteocytes. Another complication of diabetes mellitus is diabetic arthropathy which is common among patients suffering from 1 type diabetes. Degenerative processes in periodontal tissue can be associated with diabetes mellitus and reduce the strength of the tooth joints. The result of insulin deficiency is a reduction in collagen synthesis and alkaline phosphatase, as well as hypocalcemia — these states also lead to bone resorption. Considering the effect of the combination of the processes which take place in the bone tissue, it should be taken into account that the alveolar processes of the upper and lower jaws are dif-ferent from the rest of the skeleton by accelerated metabolism. This specificity makes it nec-essary to investigate changes in the optical density of teeth and alveolar processes of the lower jaw among patients with diabetes mellitus. The purpose of research is to determine peculiarities of the optical density of bone tissue of the alveolar processes of the jaw using dental computed tomography in patients with diabetes mellitus. Article describes the analysis of the optical density of the bone tissue of the alveolar processes of the lower jaws. Dental computed tomography allows quantitative and qualitative measure-ment of bone tissue density of the jaw and is an effective method for assessing the state of bone tissue in diabetes mellitus. It was shown that the structure and density of bone tissue de-pends on the severity of diabetes, the presence of complications. Marked decrease in the opti-cal density of bone tissue in the neck of the teeth in individuals with diabetes was noted, less pronounced changes were observed in the middle third of the roots of the teeth. And slight changes or even an increase in optical density were observed in the region of the apices of the teeth. Diagnosis of bone destruction of the upper and lower jaws in diabetes mellitus is most in-formative using dental computed tomography.

scholarly journals Вивчення оптичної щільності щелепових кісток у хворих із радикулярними кістами на тлі остеопорозу та без порушень мінерального обміну

2017 ◽  
Author(s):  
S. T. Havryltsiv
Keyword(s):  
Bone Mineral Density ◽  
Bone Tissue ◽  
Optical Density ◽  
Bone Mineral ◽  
Ultrasonic Waves ◽  
Published Data ◽  
Mineral Density ◽  
Facial Skeleton ◽  
Jaw Bones

There is a signifi cant scientifi c and practical interest in the study of bone mineral density in the jaw destructive processes caused by tumors in patients without bone remodeling disorders on the background of osteoporosis.The aim of the study – to conduct a comparative evaluation of jaw bone optical density in areas adjacent to radicular cysts depending on the osteoregenerating status of patients.Materials and Methods. 45 patients (20 males and 25 females) aged 20 to 70 years with radicular jaw cysts who were on an outpatient treatment at the Surgical Department of the Medical Stomatological Center of Danylo Halytskyi Lviv National Medical University were examined. Determination of bone mineral density (BMD) in patients was conducted by ultrasound bone densitometer Achilles (LUNAR Corp. (USA)) by measuring the time of ultrasonic waves pass through the calcaneus. Bone mineral density in patients was analyzed for the Z criterion. All patients underwent standard orthopantomograms on an X-ray apparatus Orthophos XG (Sirona). For the qualitative characteristics of mandibular cortical layer we used MCI index (mandibular cortical index) by Klemetti E. et al. (1994). According to published data, the index serves as an indicator of MCI systematic reduction of mineral density of the facial skeleton. Digital orthopantomograms analyzed by using the ImageJ software, which allows measuring the optical density of bone tissue at any selected jawbone area in standard brightness units in grayscale from 0 to 256 (the minimum values correspond to the background of the radiographs). The optical density of bone tissue was determined in a region directly adjacent to the shell of the radicular cyst, and compared with the intact bone on the symmetrical side of the jaw. Statistical analysis of the research results was carried out by a computer program of statistical calculation Statistica 8.Results and Discussion. As a result of ultrasound densitometry of the calcaneus in 17 women aged 45 to 60 years, we found signs of osteopenia and osteoporosis. Indicators of BMD within the age norm were detectedin 6 surveyed women who were younger than 45 years. Among the surveyed men of all ages signs of age norms were found much more frequently – in 11 cases. The MCI mandible index is in 87 % of cases directly correlated with state of bone mineral density determined by ultrasound densitometry, which is being consisted with literature data. In the absence of systemic disorders of mineral metabolism, the parameters of optical density in areas adjacent to the shells of the radicular cysts were higher compared to intact bones (p <0.05), which, in our opinion, testifi es about the compensatory reaction of the bone tissue that is subjected to pathological infl uence (compression) from the side of the cyst shell. On the background of systemic osteoporosis, optic density of jaw bones in the area of injury compared to intact sides is decreased.Conclusions. Determination of the optical density of the jaw bones adjacent to the radicular cysts can be used as a screening test for the study of osteo-regenerative potential in patients and should be taken into account when choosing surgical treatment methods.

EVALUATING OPTICAL DENSITY OF ALVEOLAR BONE IN PATIENTS WITH DIABETES MELLITUS USING CONE-BEAM COMPUTED TOMOGRAPHY

2021 ◽  
Vol 11 (2) ◽  
pp. 108-117
Author(s):  
Natalya Prozorova ◽  
Roman Fadeev ◽  
Victor Weber ◽  
Marina Chibisova ◽  
Natalia Robakidze ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Computed Tomography ◽  
Bone Tissue ◽  
Optical Density ◽  
Cone Beam Computed Tomography ◽  
Alveolar Bone ◽  
Cone Beam ◽  
Root Tips ◽  
Patients With Diabetes ◽  
Tomography Data

The study involved an analysis of optical density of the maxillary and mandibular bone tissue based on cone-beam computed tomography data. It has been shown that the structure and bone tissue density depend on the severity of diabetes mellitus and complications. The results of the study revealed a significant decrease in the bone tissue optical density at the tooth necks in people suffering from diabetes mellitus, whereas fewer changes were manifested at the middle third of the dental roots. Minor changes or even an increase in the optical density were observed at the dental root tips.

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