scholarly journals Analysis of the Morphological Characteristics of the Palatal Rugae for Three-Dimensional Superimposition of Digital Models in Korean Subjects

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Sung-Hwan Choi ◽  
Kyongmin Koh ◽  
Kee-Joon Lee ◽  
Chung-Ju Hwang ◽  
Jung-Yul Cha
Keyword(s):  
Orthodontic Treatment ◽  
Three Dimensional ◽  
Morphological Characteristics ◽  
Digital Model ◽  
Initial Visit ◽  
Reference Area ◽  
The Third ◽  
Palatal Rugae ◽  
Before And After ◽  
Left And Right

Objective. The aim of this study was to evaluate the morphological characteristics of the palatal rugae in Korean subjects to determine whether the palatal rugae can be used as an appropriate reference area for three-dimensional digital model superimpositions. Materials and Methods. In total, 343 patients (110 men, 233 women; mean age, 25.6±8.2 years) who had a digital model taken at their initial visit were included, and the numbers and types of right and left palatal rugae were investigated according to the primary, secondary, and fragmentary rugae. Finally, the differences in the positions of the third primary ruga were investigated according to the presence of additional rugae posterior to the third primary ruga. Results. The number of primary palatal rugae ranged from one to six, with 43.5% of the subjects having three primary rugae and 36.1% having four primary rugae; there were no significant differences between sexes. Except for the fragment rugae, the numbers of primary and secondary rugae were not significantly different between the left and right sides. The third primary ruga was located more significantly anteriorly when there was an additional ruga posterior to the third primary ruga (P < 0.001). Conclusions. The numbers of the palatal rugae vary greatly among individuals, and this affects the anteroposterior position of the third primary ruga. When the third primary ruga is located anteriorly, care should be taken when using it as a reference area for superimposition with a digital model before and after orthodontic treatment.

Three-Dimensional Nanostructures with Biocidal Activity Created on a Siloxane-Containing Copolyimide Film

2015 ◽  
Vol 638 ◽  
pp. 98-103 ◽  
Author(s):  
Iuliana Stoica ◽  
Andreea Irina Barzic ◽  
Magdalena Aflori ◽  
Camelia Hulubei ◽  
Valeria Harabagiu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Antimicrobial Properties ◽  
Morphological Characteristics ◽  
Interfacial Area ◽  
Average Roughness ◽  
Force Microscopy ◽  
Atomic Force ◽  
Before And After ◽  
Reactive Groups ◽  
Predominant Orientation

Surface morphological characteristics of a copolyimide film prepared from a fluorine-based dianhydride combined with an aliphatic siloxane-based diamine and an aromatic containing ether linkages one, were studied before and after oxigen plasma treatment using atomic force microscopy (AFM). The three-dimensional texture parameters calculated from the AFM data have highlighted a more pronounced surface morphology (higher average roughness and developed interfacial area ratio), improved bearing properties and no predominant orientation, as the plasma exposure time was increased from 6 to 10 minutes, using the same power (40 W). The reactive groups generated on the binding surface have facilitated the interaction with a biocidal agent, such as silver nitrate. This creates silver-containing nanoparticles, of about 120-150 nm, uniformly distributed on the copolymer surface, with a density of 10±2 particles/μm2. The functionalization with the biocidal agent of the flourinated copolyimide surface was conducted for testing its antimicrobial properties, namely the inhibition/destruction of Escherichia coli bacterium.

scholarly journals Model Analysis of Anatomical Morphology Changes of Palatal Rugae Before and After Orthodontic Treatment

2017 ◽  
Vol 35 (4) ◽  
pp. 1224-1229 ◽  
Author(s):  
Li Bing ◽  
Tae-Geon Kwon ◽  
Wu Xiao ◽  
Hee-Moon Kyung ◽  
Ke-Ming Yun ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Model Analysis ◽  
Palatal Rugae ◽  
Before And After ◽  
Morphology Changes

scholarly journals Plicae Palmatae on MR in Uterus Didelphys: the Incidence and Morphological Characteristics

2021 ◽  
Vol 2 (6) ◽  
pp. 01-03
Author(s):  
Wang Xiaoying
Keyword(s):  
Three Dimensional ◽  
Morphological Characteristics ◽  
Reproductive Age ◽  
Mr Images ◽  
Uterus Didelphys ◽  
Significant Difference ◽  
Cervical Disease ◽  
Left And Right ◽  
The Right ◽  
Plicae Palmatae

Objective: To investigate the incidence of plicae palmatae in uterus didelphys and its morphological characteristics on MR imaging. Methods: We retrospectively collected 37 consecutive female pelvic MR images diagnosed with uterus didelphys between August 2012 and November 2020. Patients with the following conditions were excluded: (a) repeated examination; (b) poor image quality; (c) cervical disease. Axial and coronal T2-weight images and axial three-dimensional (3D) volumetric isotropic T2-weighted acquisition (VISTA) were used to evaluate the ridge of plicae palmatae (RPP). A multiplanar reformation of the cervical axis from 3D-VISTA sequence was performed to measure the height and width of RPP. Non-normal variables based on the Kruskal-Wallis H test was used for statistical analysis. A two-tailed test where P < 0.05 was considered statistically significant. Results: Twenty-six cases were finally included in the statistics. The average age was 25.7±9.0 years (range, 10-45 years). RPP was observed on both cervices in 16 patients (61.5%), only on the left cervix in 3 patients (11.5%), and only on the right cervix in 4 patients (15.4%). There were 3 cases with no RPP observed in any of their cervix (11.5%).All RPP appear symmetrically on the anterior and posterior walls of the cervix. There was no statistically significant difference in height, width, and height/width of the RPP in the left and right cervix (p＞0.05). Conclusions: RPP is encountered in 88.5% patients with duplicated uterine cervices in our cohort. This incidence is similar to that reported in women with normal uterus of reproductive age.

scholarly journals Evaluation of Palatal Rugae Following Orthopedic Treatment Using Rapid Maxillary Expander and Facemask

2020 ◽  
Vol 47 (2) ◽  
pp. 167-175
Author(s):  
Sehee Park ◽  
Namki Choi ◽  
Seonmi Kim
Keyword(s):  
Pediatric Patients ◽  
Transverse Dimension ◽  
Reference Area ◽  
Maxillary Expansion ◽  
Hard Tissue ◽  
Orthopedic Treatment ◽  
Anatomical Changes ◽  
The Third ◽  
Palatal Rugae ◽  
Tissue Movement

The purpose of this study was to determine whether the palatal rugae could be used as an appropriate reference area for serial model superimposition following Rapid maxillary expansion(RME) and facemask treatment.<br/>A total of 52 pediatric patients who had undergone RME and facemask treatment were selected. Palate and palatal rugae in the pre- and post- treatment casts from the patients were measured.<br/>In spite of dentoalveolar changes occurred by RME and facemask, anteroposterior changes in palate and palatal rugae were not significant. Anatomical changes of palate and palatal rugae were mostly shown in the transverse dimension. The soft tissue of the palatal rugae stretches in adaptation to hard tissue movement. Among the evaluated landmarks, the medial point of the third palatal rugae seemed to be the most stable.<br/>The observed alterations in the palatal rugae demonstrated the potential of medial points of third palatal rugae as a reference point in model superimpositions to evaluate dental movement within the maxillary arch following RME and facemask treatment.

scholarly journals Influence of Orthodontic Treatment with Premolar Extraction on the Spatial Position of Maxillary Third Molars in Adult Patients: A Retrospective Cone-bean Computed Tomography Study

2020 ◽  
Author(s):  
Fangwei Pan ◽  
Zhentao Yang ◽  
Jian Wang ◽  
Jialing Liu ◽  
Chenghao Zhang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Orthodontic Treatment ◽  
Spatial Position ◽  
Adult Patients ◽  
Third Molars ◽  
Position Change ◽  
Premolar Extraction ◽  
The Third ◽  
Anterior Nasal Spine ◽  
Before And After

Abstract Background: The aim of this study was to evaluate the changes in position, angulation, and rotation of maxillary third molars in adults after orthodontic treatment with premolar extraction using a space coordinate system based on Cone-bean computed tomography (CBCT) images. Methods: Forty-nine maxillary third molars from 27 patients (mean age, 20.78 years) were included in the study. CBCT images were obtained before and after orthodontic treatment with premolars extracted (mean treatment duration, 31.47 months). The changes in the position, angulation, and rotation of the third molars were evaluated with a space coordinates system using four landmarks: anterior nasal spine (ANS), posterior nasal spine (PNS), left and right orbitales. Results: After orthodontic treatment, the third molars moved forward (mean, 1.44 mm) (p < 0.001) and downward (mean, 2.87 mm) (p < 0.001) accompanied by outward rotation (mean, 5.38°) of the crown (p = 0.001), but the changes in angulation were insignificant.Conclusions: This was the first study to systematically investigate the spatial position change of maxillary third molars in adult patients who received orthodontic treatment with premolar extraction. During the process, maxillary third molars moved downward and forward accompanied by outward rotation of the crown.

scholarly journals Analysis of Palatal Rugae Morphology Before and After Orthodontic Treatment by a Digital Image Recognition System

2017 ◽  
Vol 35 (2) ◽  
pp. 420-424
Author(s):  
Wu Xiu-Ping ◽  
Han Jian-Ning ◽  
Fen Pan ◽  
Wan Yu-Jin ◽  
Bing Li
Keyword(s):  
Image Recognition ◽  
Digital Image ◽  
Orthodontic Treatment ◽  
Recognition System ◽  
Palatal Rugae ◽  
Before And After

scholarly journals Computed tomography evaluation of palatal form in the transversal and sagittal fabrication process and the effect of first molar and canine crown angulations

2019 ◽  
Vol 28 ◽  
pp. 2633366X1989680
Author(s):  
Taljabini Yamen ◽  
Oz Ulas
Keyword(s):  
Orthodontic Treatment ◽  
Three Dimensional ◽  
Cone Beam ◽  
P Value ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Angular Measurements ◽  
Left And Right ◽  
Dependent Samples ◽  
Cone Beam Tomography

The purpose of this study was to investigate changes in the palatal form in patients treated with and without premolar extractions. A total of 40 patients who had undergone orthodontic treatment (extraction and non-extraction) were divided into two groups coequally. Retrospective records were collected at pretreatment and at bracket removal. Stone casts were scanned by cone-beam tomography; linear and angular measurements on the three-dimensional model were then performed for both the sagittal direction and the transverse direction. Paired t-tests for dependent samples were used to compare results within the same group, and t-tests for independent samples were used to compare results between groups. A p value less than 0.05 was considered statistically significant. The sagittal palatal form increased in the non-extraction group, whereas it decreased in the extraction group. There was a decrement in the transversal palatal form in both groups. There were no differences or changes in molar or canine crown angulation in the non-extraction group. Conversely, distal tipping of the upper right first molar and distal tipping and lingual movement of both left and right upper canines were observed in the extraction group.

scholarly journals Does anchorage loss differ with 0.018-inch and 0.022-inch slot bracket systems?

2019 ◽  
Vol 89 (4) ◽  
pp. 605-610
Author(s):  
Yassir A. Yassir ◽  
Grant T. McIntyre ◽  
Ahmed M. El-Angbawi ◽  
David R. Bearn
Keyword(s):  
Orthodontic Treatment ◽  
Three Dimensional ◽  
Total Sample ◽  
Fixed Appliance ◽  
The Third ◽  
Significant Difference ◽  
Maxillary Molar ◽  
Slot Size ◽  
Baseline Characteristics ◽  
Anchorage Loss

ABSTRACT Objectives: To compare maxillary first molar anchorage loss between 0.018-inch and 0.022-inch slot fixed appliance systems. Materials and Methods: Patients requiring bilateral maxillary premolar extractions (n = 74) within a randomized clinical trial comparing the effectiveness of 0.018-inch and 0.022-inch slot MBT bracket systems (3M-Unitek, Monrovia, Calif) were included. Three-dimensional pre- and posttreatment digital models were landmarked and measured (R700 scanner and OrthoAnalyzer software, 3Shape, Copenhagen, Denmark). Anteroposterior position of the first molars was measured using the third medial rugae point as a reference. Anchorage loss (AL) represented the subtraction of the posttreatment distance from the pretreatment distance for both anchorage loss right (ALR) and left (ALL) sides. The values were then compared using a two-way analysis of variance. Results: There were 41 and 33 cases for the 0.018-inch and 0.022-inch bracket slot systems, respectively. The baseline characteristics were similar between groups, except for the presence or absence of anchorage devices (P = .050). For the total sample: 0.018-inch ALR = 3.86 mm, ALL = 3.30 mm and 0.022-inch ALR = 3.73 mm, ALL = 3.47 mm (P = .970). There was also no significant difference between the 0.018-inch and 0.022-inch groups when subjects with anchorage devices were excluded (P = .383). Conclusions: Bracket slot size does not influence maxillary molar anchorage loss during orthodontic treatment.

scholarly journals A Novel Method for the Assessment of Three-Dimensional Tooth Movement during Orthodontic Treatment

2009 ◽  
Vol 79 (3) ◽  
pp. 447-453 ◽  
Author(s):  
Insan Jang ◽  
Motohiro Tanaka ◽  
Yoshiyuki Koga ◽  
Seiko Iijima ◽  
Joseph H. Yozgatian ◽  
...  
Keyword(s):  
Tooth Movement ◽  
Three Dimensional ◽  
Orthodontic Tooth Movement ◽  
Scanning System ◽  
The Third ◽  
Anterior Teeth ◽  
Palatal Rugae ◽  
Significant Difference ◽  
Palatal Vault ◽  
Dental Casts

Abstract Objective: To (1) evaluate the stability of palatal rugae as landmarks for superimposition of dental casts and (2) establish a three-dimensional superimposition method of maxillary dental casts for analyzing orthodontic tooth movement. Materials and Methods: The sample consisted of dental casts obtained from 10 patients treated with extraction of bilateral maxillary first premolars and placement of three palatal miniscrews as anchorage for retraction of the anterior teeth. Dental casts were measured by means of laser surface scanning system, and three-dimensional images were reconstructed. Serial dental casts were superimposed on the three miniscrews as registration landmarks (miniscrew-superimposition method), and the displacement of each palatal ruga point during the closure of extraction spaces was measured. Displacement of the central incisors was measured by the miniscrew-superimposition method and the proposed superimposition technique (ruga-palate-superimposition method). Correlation analysis and paired t-tests were performed to determine whether a significant difference existed between the measurements of the two superimposition methods. Results: The medial points of the third palatal rugae and the shape of the palatal vault were stable throughout the treatment. The displacement of the central incisors measured using the ruga-palate-superimposition method showed no significant difference with that measured using the miniscrew-superimposition method. Conclusion: The maxillary dental casts can be reliably superimposed on the medial points of the third palatal rugae and the palatal vault as reference landmarks.

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