scholarly journals Correlation analysis of periodontal tissue dimensions in the esthetic zone using a non-invasive digital method

2021 ◽  
Vol 51 ◽  
Author(s):  
Yun-Jeong Kim ◽  
Ji-Man Park ◽  
Hyun-Jae Cho ◽  
Young Ku
Keyword(s):  
Correlation Analysis ◽  
Digital Method ◽  
Periodontal Tissue ◽  
Non Invasive

scholarly journals Non-invasive evaluation of labial gingival and alveolar crest thickness in the maxillary anterior teeth region by 15-MHz B-mode ultrasonography

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Meng Sun ◽  
Xiaofeng Liu ◽  
Ting Xia ◽  
He Meng
Keyword(s):  
Surgical Procedures ◽  
Periodontal Tissue ◽  
Gingival Thickness ◽  
Gingival Margin ◽  
Non Invasive ◽  
Anterior Teeth ◽  
Alveolar Crest ◽  
The Mean ◽  
Healthy Participants ◽  
Invasive Evaluation

Abstract Background Knowledge of gingival thickness (GT) and alveolar crest thickness (ACT) is essential when performing surgical and non-surgical procedures in the maxillary anterior teeth region. This study aimed at evaluating the GT and ACT in the maxillary anterior teeth region using 15-MHz B-mode Ultrasonic (US). Methods A total of 300 teeth from 50 healthy participants, comprising 25 women and 25 men, aged between 18 and 35 years were analyzed. We measured labial periodontal tissue structures of maxillary anterior teeth, including GT and ACT, at 3 mm apical to the gingival margin (GT3) and the crestal level, respectively. The GT and ACT measurements were correlated. Results The mean labial GT3 of the maxillary central incisors, lateral incisors, and canines were 1.24 ± 0.03 mm, 1.21 ± 0.03 mm and 1.11 ± 0.03 mm, respectively. Canine GT3 was significantly thin than those in the central and lateral incisors (P < 0.05). With regards to labial ACT, we recorded 0.79 ± 0.03 mm, 0.76 ± 0.02 mm and 0.73 ± 0.02 mm for maxillary central incisors, lateral incisors and canines, respectively. There were no significant differences in ACT of maxillary anterior teeth (P > 0.05). GT3 of men was greater than that of women (P < 0.05). In addition, GT and ACT were positively correlated (r = 0.32, P < 0.01). Conclusion 15-MHz B-mode US is an effective tool for measuring labial GT and ACT of anterior teeth. There are sex-associated differences in GT3 and the correlation between the GT3 and ACT of anterior teeth is moderately positive.

Non-invasive assessment of kidney allograft fibrosis with shear wave elastography: A radiological-pathological correlation analysis

2018 ◽  
Vol 25 (5) ◽  
pp. 450-455 ◽  
Author(s):  
Maggie KM Ma ◽  
Helen KW Law ◽  
Kin Sun Tse ◽  
Kwok Wah Chan ◽  
Gary CW Chan ◽  
...  
Keyword(s):  
Correlation Analysis ◽  
Shear Wave ◽  
Shear Wave Elastography ◽  
Kidney Allograft ◽  
Non Invasive ◽  
Pathological Correlation

scholarly journals Correlation analysis of periodontal tissue dimensions in esthetic zone using a non-invasive digital method

2019 ◽  
Author(s):  
Yun-Jeong Kim ◽  
Ji-Man Park ◽  
Hyun-Jae Cho ◽  
Young Ku
Keyword(s):  
Alveolar Bone ◽  
Digital Method ◽  
Clinical Parameters ◽  
Bone Thickness ◽  
Gingival Thickness ◽  
Periodontal Tissues ◽  
Non Invasive ◽  
Crown Length ◽  
Crown Width ◽  
Alveolar Crest

Abstract Background. Recently, direct intraoral scanning and superimposing methods have been applied to measure the dimensions of periodontal tissues. The aim of this study was to analyze various correlations between labial gingival thickness and underlying alveolar bone thickness as well as clinical parameters among the three tooth types (central incisors, lateral incisors, and canines) using the digital method. Methods. In 20 periodontally healthy subjects, cone-beam computed tomography (CB-CT) images and intraoral scanned files were obtained. Measurements of labial alveolar bone and gingival thickness at the central incisors, lateral incisors, and canines were performed at 0–5 mm points from the alveolar crest on the superimposed images. Clinical parameters including the crown width/crown length ratio (CW/CL), gingival width (GW), gingival scallop (SC), and transparency of the periodontal probe through the gingival sulcus (TRAN) were examined. Results. Gingival thickness at the alveolar crest level was positively correlated with the thickness of the alveolar bone plate (p<0.05). The central incisors revealed a strong correlation between A1 and A2 (labial alveolar bone thickness at 1 and 2 mm, respectively, inferior to the alveolar crest) with the thickness of the gingiva at the G0, whereas G0 and labial bone thickness at every level were positively correlated at the lateral incisors and canines. The correlation analyses revealed no significant correlation between the clinical parameters and the hard and soft tissue thicknesses. Conclusions. The gingival thickness at the alveolar crest level revealed a positive correlation with labial alveolar bone thickness, although this correlation at identical depth levels was not significant. The measurement of gingival thickness at, or under the alveolar crest level, was not associated with the clinical parameters of the gingival features, such as the crown form and the gingival scallop, or the keratinized gingival width. Therefore, it is recommended that, in future studies, accurate measuring methods of the supracrestal gingival area should be developed, and the predictive potential of clinical parameters on tissue thickness should be verified.

scholarly journals ANALYSIS OF THE ANNEXIN V APOPTOSIS MARKER LEVEL AND DENTAL STATUS IN PATIENTS WITH CHRONIC GENERALIZED PERODONTITIS AND BRONCHOECTATIC DISEASE

2019 ◽  
Vol 26 (2) ◽  
pp. 85-92
Author(s):  
Artem K. Sarkisov ◽  
Ekaterina A. Polunina ◽  
Karen A. Sarkisov
Keyword(s):  
Correlation Analysis ◽  
Oral Fluid ◽  
Annexin V ◽  
Control Group ◽  
Periodontal Tissue ◽  
Healthy Individuals ◽  
Periodontal Tissues ◽  
Condition Indices ◽  
Apoptosis Marker ◽  
Marker Level

Aim: Our aim was to study and analyze the level of the annexin V apoptosis marker in the oral fluid in patients with generalized periodontitis without general somatic pathology and against the background of bronchiectasis.Materials and methods. 40 patients diagnosed with generalized periodontitis without somatic pathology and 50 patients diagnosed with generalized periodontitis and bronchiectasis were examined. The control group included 40 somatically healthy individuals with intact periodont. Indices characterizing the state of periodontal tissues, such as PMA, PI, Muhlemann, OHI-s were determined for all the examined persons. The level of the annexin V apoptosis marker was determined in the oral fluid by enzyme immunoassay.Results. It was established that the value of the indices of periodontal tissues (PMA, PI, Muhlemann, OHI-s) was statistically signifi cantly higher in the group of patients with generalized periodontitis against the background of bronchiectasis both in comparison with the control group and with the group of patients without general somatic pathology. The level of the annexin V apoptosis marker was also statistically signifi cantly higher in patients with generalized periodontitis against the background of bronchiectasis as compared with the control group and the group of patients without general somatic pathology (p<0.001). According to the correlation analysis, statistically signifi cant relationships of the moderate strength between the level of annexin V and the value of the indices of periodontal tissues were found both in the group of patients without general somatic pathology and in the group of patients with generalized periodontitis against the background of bronchiectasis. At the same time, the strength of these relationships in patients with generalized periodontitis against the background of bronchiectasis was greater as compared to the group of patients without general somatic pathology.Conclusion. The level of the annexin V apoptosis marker in the oral fluid of patients with generalized periodontitis against the background of bronchiectasis is statistically signifi cantly higher (p<0.001) than in patients with generalized periodontitis without general somatic pathology. The results of the correlation analysis indicate the presence of relationships between the level of annexin V and the value of periodontal tissue condition indices (PMA, PI, Muhlemann, OHI-s). Thus, increased apoptosis in generalized periodontitis against the background of bronchiectasis can act as a factor aggravating the damage to periodontal tissues.

Microdensitometer—computer correlation analysis of ultrastructural periodicity

1978 ◽  
Vol 36 (2) ◽  
pp. 32-33
Author(s):  
D.R. Ensor ◽  
C.G. Jensen ◽  
J.A. Fillery ◽  
R.J.K. Baker
Keyword(s):  
Correlation Analysis ◽  
Background Noise ◽  
Computer Control ◽  
Optical Diffraction ◽  
Screw Thread ◽  
Straight Line ◽  
Computer Storage ◽  
Correlation Process ◽  
Electron Microscope Image ◽  
Fixed Beam

Because periodicity is a major indicator of structural organisation numerous methods have been devised to demonstrate periodicity masked by background “noise” in the electron microscope image (e.g. photographic image reinforcement, Markham et al, 1964; optical diffraction techniques, Horne, 1977; McIntosh,1974). Computer correlation analysis of a densitometer tracing provides another means of minimising "noise". The correlation process uncovers periodic information by cancelling random elements. The technique is easily executed, the results are readily interpreted and the computer removes tedium, lends accuracy and assists in impartiality.A scanning densitometer was adapted to allow computer control of the scan and to give direct computer storage of the data. A photographic transparency of the image to be scanned is mounted on a stage coupled directly to an accurate screw thread driven by a stepping motor. The stage is moved so that the fixed beam of the densitometer (which is directed normal to the transparency) traces a straight line along the structure of interest in the image.

X-ray microtomography

1988 ◽  
Vol 46 ◽  
pp. 998-999
Author(s):  
H.W. Deckman ◽  
B.F. Flannery ◽  
J.H. Dunsmuir ◽  
K.D' Amico
Keyword(s):  
Computed Tomography ◽  
Internal Structure ◽  
Imaging Technique ◽  
Three Dimensional ◽  
Tissue Structure ◽  
Individual Element ◽  
X Ray ◽  
Non Invasive ◽  
Panoramic Imaging ◽  
Three Dimensional Images

We have developed a new X-ray microscope which produces complete three dimensional images of samples. The microscope operates by performing X-ray tomography with unprecedented resolution. Tomography is a non-invasive imaging technique that creates maps of the internal structure of samples from measurement of the attenuation of penetrating radiation. As conventionally practiced in medical Computed Tomography (CT), radiologists produce maps of bone and tissue structure in several planar sections that reveal features with 1mm resolution and 1% contrast. Microtomography extends the capability of CT in several ways. First, the resolution which approaches one micron, is one thousand times higher than that of the medical CT. Second, our approach acquires and analyses the data in a panoramic imaging format that directly produces three-dimensional maps in a series of contiguous stacked planes. Typical maps available today consist of three hundred planar sections each containing 512x512 pixels. Finally, and perhaps of most import scientifically, microtomography using a synchrotron X-ray source, allows us to generate maps of individual element.

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