scholarly journals Evaluation of an open access generic 3D software for Orthodontic diagnosis and treatment planning

2021 ◽  
Vol 21 ◽  
pp. e227903
Author(s):  
Hany Salah Eldin Eid ◽  
Omnia A. Elhiny
Keyword(s):  
Open Access ◽  
Treatment Planning ◽  
Laser Scanner ◽  
Diagnosis And Treatment ◽  
Linear Measurements ◽  
Comparison Results ◽  
Significant Difference ◽  
Software Programs ◽  
3D Software ◽  
Angular Transformation

Aim: To evaluate the accuracy and the validity of orthodontic diagnostic measurements, as well as virtual tooth transformations using a generic open access 3D software compared to OrthoAnalyzer (3Shape) software; which was previously tested and proven for accuracy. Methods: 40 maxillary and mandibular single arch study models were duplicated and scanned using 3Shape laser scanner. The files were imported into the generic and OrthoAnalyzer software programs; where linear measurements were taken twice to investigate the accuracy of the program. To test the accuracy of the program format, they were printed, rescanned and imported into OrthAnalyzer. Finally, to investigate the accuracy of editing capabilities, linear and angular transformation procedures were performed, superimposed and printed to be rescanned and imported to OrthoAnalyzer for comparison. Results: There was no statistically significant difference between the two groups using the two software programs regarding the accuracy of the linear measurements (p>0.05). There was no statistically significant difference between the different formats among all the measurements, (p>0.05). The editing capabilities also showed no statistically significant difference (p>0.05). Conclusion: The generic 3D software (Meshmixer) was valid and accurate in cast measurements and linear and angular editing procedures. It can be used for orthodontic diagnosis and treatment planning without added costs.

scholarly journals Cephalometric Comparison of Wits Appraisal and APP-BPP to the ANB Angle

2020 ◽  
Vol 10 (1) ◽  
pp. 40-43
Author(s):  
Sanzee Silwal ◽  
Rabindra Man Shrestha ◽  
Ujjwal Pyakurel ◽  
Sanjeev Bhandari
Keyword(s):  
Treatment Planning ◽  
Descriptive Statistics ◽  
Diagnosis And Treatment ◽  
Strong Positive Correlation ◽  
Mean Values ◽  
Positive Correlation ◽  
Skeletal Class ◽  
Lateral Cephalograms ◽  
Significant Difference ◽  
Gender Groups

Introduction: Great emphasis has been given to the evaluation of sagittal apical base relationship in orthodontic diagnosis and treatment planning. Supposedly, the most commonly used parameter is “ANB angle”; however its accuracy and reliability have been questioned. Many authors have alternatively introduced linear parameters like Wits appraisal and APP-BPP. The objective of the study was to compare Wits appraisal and APP-BPP with the ANB angle. Materials & Method: This study was conducted on patients visiting the Department of Orthodontics, Kantipur Dental College, Kathmandu. The sample included 100 lateral cephalograms of subjects of the age group 18–30 years with skeletal Class I relation. Parameters like ANB angle, Wits appraisal and APP-BPP were measured to assess the sagittal jaw relationship. Descriptive statistics were calculated for each parameter. Spearman’s test was done to evaluate the correlation between the parameters. Mann-Whitney U test was done to compare the parameters between male and female subjects. Result: Descriptive statistics showed that the mean values of ANB, Wits appraisal and APP-BPP were 2.26±1.19°, 0.38±0.87mm and 3.25±1.20mm respectively. Mann-Whitney U test showed no significant difference among the parameters between the gender groups (p>0.05). Spearman’s test showed significant correlation among the parameters ANB angle, Wits appraisal and APP-BPP. The parameters had strong positive correlation as r value was greater than 0.7. Conclusion: The strong positive correlation between ANB angle, Wits appraisal and APP-BPP indicates that these parameters can be used as better adjunct to ANB angle in orthodontic diagnosis and treatment planning.

scholarly journals Cephalometric evaluation of Brahmins of Kathmandu, Nepal based on Jarabak’s analysis

2019 ◽  
Vol 8 (1) ◽  
pp. 13-19
Author(s):  
Mona Pokharel ◽  
Situ Lal Shrestha
Keyword(s):  
Treatment Planning ◽  
Great Degree ◽  
Caucasian Population ◽  
Diagnosis And Treatment ◽  
Inclusion Criteria ◽  
Lateral Cephalogram ◽  
Male And Female ◽  
Gender Comparison ◽  
Significant Difference ◽  
Craniofacial Features

Background: The cephalometric norms derived from Caucasian population shows a great degree of variation when applied to different population. Objectives: The present research was performed with the objective of determining cephalometric norms of Brahmins of Nepal based on Jarabak’s analysis, to evaluate the variability between male and female and to compare the cephalometric norms with Caucasians. Methodology: Lateral cephalogram of 108 non-growing patients which consisted of 63 females and 45 males ofNepalese Brahmins who met our inclusion criteria were traced manually. Thirteen craniofacial parameters of Jarabak’s analysis were measured. Results: The comparison between Brahmin populations of Nepal with the Caucasian population showed statistically significant difference in ten out of thirteen parameters. The comparison between Nepalese male Brahmins and female Brahmins showed that there were statistically significant differences in eleven out of thirteen parameters. Conclusion: It can be concluded that there exists sexual and ethnic dimorphism in craniofacial features. The findings of the study highlight the fact that Brahmin population is significantly different from Caucasian population. Females presented with smaller craniofacial variable than male when gender comparison was performed among Nepalese Brahmins male and female. This research has helped to generate knowledge and understanding of craniofacial features of Nepalese Brahmins and derived norms for orthodontic diagnosis and treatment planning.

Sella Turcica: An Important Aid in Diagnosis and Treatment Planning

2016 ◽  
Vol 6 (3) ◽  
pp. 181-183
Author(s):  
VK Ravindranath ◽  
Girish Karandikar
Keyword(s):  
Treatment Planning ◽  
Age Groups ◽  
Sella Turcica ◽  
Class Ii ◽  
Diagnosis And Treatment ◽  
Age Group ◽  
Class Iii ◽  
Skeletal Class ◽  
Linear Dimensions ◽  
Significant Difference

ABSTRACT The purpose of this study was to describe and measure the size of sella turcica in subjects with different skeletal types. Lateral cephalometric radiographs of 120 individuals (60 males and 60 females) with an age range of 11 to 26 years were taken and distributed according to skeletal classification: 40 class I (ANB: 20–40), 40 class II (ANB: >40), and 40 class III (ANB: <20). The sella turcica on each radiograph was analyzed and measured to determine the linear dimensions of length, depth, and diameter. Student's t-test was used to calculate differences in linear dimensions, while a one-way analysis of variance was performed to study the relationship between skeletal type and sella size. No significant differences in linear dimensions between genders could be found. When age was evaluated, significant differences were found between the older (15 years or more) and the younger (11–14 years) age groups at the 0.01 and 0.001 levels for length, depth, and diameter. Sella size of the older age group was larger than in the younger age group. When skeletal type was compared with sella size, a significant difference was found in the diameter of sella between the classes II and III subjects (p < 0.01). Larger diameter values were present in the skeletal class III subjects, while smaller diameter sizes were apparent in class II subjects (multiple comparison tests). When gender, age, and skeletal type were all compared with the size of the sella (regression analyses), age was significantly related to a change of length (p < 0.01) and diameter (p < 0.001). How to cite this article Zanke PN, Patni V, Sonawane M, Karandikar G, Ravindranath VK, Maskarenj M. Sella Turcica: An Important Aid in Diagnosis and Treatment Planning. J Contemp Dent 2016;6(3):181-183.

scholarly journals Estimation of root inclination of anterior teeth from virtual study models: accuracy of a commercial software

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Panagiota Magkavali-Trikka ◽  
Demetrios J. Halazonetis ◽  
Athanasios E. Athanasiou
Keyword(s):  
Sample Size Calculation ◽  
Laser Scanner ◽  
3D Scanner ◽  
Anterior Teeth ◽  
Digital Impressions ◽  
Significant Difference ◽  
Natural Teeth ◽  
Human Skulls ◽  
3D Software ◽  
Plaster Models

Abstract Background The aim of the study was to assess the accuracy of commercially available software in estimating anterior tooth root inclination from digital impressions of the crowns of the teeth. Subjects and methods Following sample size calculation and application of inclusion and exclusion criteria, 55 anterior natural teeth derived from 14 dry human skulls were selected. Impressions were taken and plaster study models were fabricated. Plaster models were scanned using the high-resolution mode of an Ortho Insight 3D laser scanner. The teeth on the digital scans were segmented and virtual roots were predicted and constructed by the Ortho Insight 3D software. The 55 natural teeth were removed from the dry skulls and scanned using the Identica extraoral white-light scanner in order to calculate their actual root angulation. The teeth were scanned twice, once to acquire the crown and the cervical part of the root, and a second time to acquire the remaining part of the root, including the apex. The two scanned segments were joined in software by superimposing them along their common part. The accuracy of the digital models generated by the Ortho Insight 3D scanner in predicting root angulation was assessed by comparing these results to the corresponding measurements of the 55 natural teeth. The long axes of the tooth models obtained from the software prediction and the scanning of the actual teeth were computed and the discrepancy between them was evaluated. The error of the methods was evaluated by repeating the measurements on 14 teeth and showed an acceptable range. Results The predicted tooth angulation was found to differ significantly from the actual angulation, both statistically and clinically. The angle between the predicted and actual long axes ranged from 2.0 to 37.6°(average 9.7°; median 7.4°). No statistically significant difference was found between tooth categories. Conclusions Further investigations and improvements of the software are needed before it can be considered clinically effective.

Diagnosis and Treatment Planning for the Surgical-Orthodontic Patient

1989 ◽  
Vol 16 (4) ◽  
pp. 645-658 ◽  
Author(s):  
Katherine Dryland Vig, BDS ◽  
Edward Ellis
Keyword(s):  
Treatment Planning ◽  
Diagnosis And Treatment

scholarly journals The Effect of Perioral Scan and Artificial Skin Markers on the Accuracy of Virtual Dentofacial Integration: Stereophotogrammetry Versus Smartphone Three-Dimensional Face-Scanning

2020 ◽  
Vol 18 (1) ◽  
pp. 229
Author(s):  
Hang-Nga Mai ◽  
Du-Hyeong Lee
Keyword(s):  
Three Dimensional ◽  
Laser Scanner ◽  
Statistical Analyses ◽  
Integrated Models ◽  
Image Integration ◽  
Positional Accuracy ◽  
Significant Difference ◽  
Face Scanning ◽  
Scanning Systems ◽  
Dimensional Face

This study evaluated the effects of different matching methods on the accuracy of dentofacial integration in stereophotogrammetry and smartphone face-scanning systems. The integration was done (N = 30) with different matching areas (n = 10), including teeth image only (TO), perioral area without markers (PN) and with markers (PM). The positional accuracy of the integrated models was assessed by measuring the midline linear deviations and incisal line canting between the experimental groups and laser scanner-based reference standards. Kruskal–Wallis and Mann–Whitney U tests were used for statistical analyses (α = 0.05). The PM method exhibited the smallest linear deviations in both systems; while the highest deviations were found in the TO in stereophotogrammetry; and in PN in smartphone. For the incisal line canting; the canting degree was the lowest in the PM method; followed by that in the TO and the PN in both systems. Although stereophotogrammetry generally exhibited higher accuracy than the smartphone; the two systems demonstrated no significant difference when the perioral areas were used for matching. The use of perioral scans with markers enables accurate dentofacial image integration; however; cautions should be given on the accuracy of the perioral image obtained without the use of markers.

scholarly journals Temporomandibular Joint Osseous Morphology of Class I and Class II Malocclusions in the Normal Skeletal Pattern: A Cone-Beam Computed Tomography Study

Diagnostics ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 541
Author(s):  
Xiao-Chuan Fan ◽  
Lin-Sha Ma ◽  
Li Chen ◽  
Diwakar Singh ◽  
Xiaohui Rausch-Fan ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Temporomandibular Joint ◽  
Cone Beam Computed Tomography ◽  
Class Ii ◽  
Class I ◽  
Cone Beam ◽  
Glenoid Fossa ◽  
Linear Measurements ◽  
Significant Difference ◽  
Skeletal Pattern

(1) Background—The aim of the present study was to evaluate the correlation between the temporomandibular joint (TMJ) osseous morphology of normal skeletal pattern individuals with different dental malocclusions by using cone-beam computed tomography (CBCT). (2) Methods—The CBCT images of bilateral TMJs in 67 subjects with skeletal class I and average mandibular angle (26 males and 41 females, age range 20–49 years) were evaluated in this study. The subjects were divided into class I, class II division 1, and class II division 2 according to the molar relationship and retroclination of the maxillary incisors. Angular and linear measurements of TMJ were evaluated and the differences between the groups were statistically analyzed. (3) Results—Intragroup comparisons showed statistical differences for articular eminence inclination, the width of the glenoid fossa, the ratio of the width of the glenoid fossa to the depth of the glenoid fossa, the condylar angle, and the intercondylar angle between the malocclusion groups. The measurements of the glenoid fossa shape showed no significant difference between the left and right sides. Females showed more differences in the morphological parameters of TMJ between the three malocclusion groups than the males. (4) Conclusion—The present study revealed differences in the TMJ osseous morphology between dental class I and class II malocclusions in the normal skeletal pattern.

scholarly journals 1338. Analysis of Prescription Guideline Adherence in Pediatric Outpatient Pneumonia Treatment

2020 ◽  
Vol 7 (Supplement_1) ◽  
pp. S680-S681
Author(s):  
Carly Heck ◽  
Judith Martin ◽  
Marcia Kurs-Lasky
Keyword(s):  
Drug Allergy ◽  
Health Concern ◽  
Second Line ◽  
First Line ◽  
Second Line Therapy ◽  
First Line Therapy ◽  
Line Therapy ◽  
Comparison Results ◽  
Significant Difference ◽  
Recommended Therapy

Abstract Background Background: Antibiotic resistance is a major public health concern. A modifiable intervention is outpatient antibiotic stewardship. The goal of this study was to review the electronic health records (EHR) of children diagnosed with community acquired pneumonia (CAP) to compare patients who received non-guideline concordant therapy with those prescribed recommended therapy. Methods Methods: This was a retrospective chart review of 300 children (6 months to 6 years old) with an outpatient diagnosis of CAP between July 2017 and June 2019. 45 Children’s Hospital of Pittsburgh (CHP) and UPMC Children’s Community Pediatrics (CCP) practices were included. CHP practices are academic-based with trainees involved in visits, while CCP practices do not include trainees. First-line recommended therapy was defined as amoxicillin, second-line therapy as azithromycin or amoxicillin-clavulanate, and all other prescriptions were defined as other. Patients prescribed first-line therapy were compared to patients with second-line therapy or other. If first-line therapy was not prescribed, the EHR was manually reviewed for justification. If drug allergy was listed, the medication allergy and type of reaction were recorded. Results Results: In this study the minority of children (43%) were prescribed first-line therapy. This group was younger (57 vs. 63 months of age), more likely to be Non-white (80%), and seen at the CHP locations than those prescribed non-guideline concordant therapy. The average symptom duration was shorter, heart rate and respiratory rate were higher and the presence of fever was more common in the first-line therapy group. Justification for non-guideline therapy was most often reported as to provide coverage for atypical organisms. The most common drug allergy recorded was amoxicillin, and urticaria with unknown timing was the most common type of reaction. Demographics Comparison Results Justification for Second-line / Other Therapy and Drug Allergy Results Conclusion This project observed a high proportion of children being prescribed non-guideline concordant therapy for a diagnosis of CAP. Age, race, practice location, and severity of illness measures showed a statistically significant difference between groups. This study highlights the importance of education which reviews the current guidelines and the most likely pathogens for children with CAP. Disclosures All Authors: No reported disclosures

scholarly journals Assessment of necessity of neuronavigation in localization of calvarial extra-axial lesions in the setting of limited resources

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Hussein Soffar ◽  
Mohamed F. Alsawy
Keyword(s):  
Conventional Method ◽  
Linear Measurement ◽  
Limited Resources ◽  
Linear Measurements ◽  
Surgical Interventions ◽  
Localization Method ◽  
Mean Error ◽  
Significant Difference ◽  
The Mean ◽  
Mean Time

Abstract Background Neuronavigation is a very beneficial tool in modern neurosurgical practice. However, the neuronavigation is not available in most of the hospitals in our country raising the question about its importance in localizing the calvarial extra-axial lesions and to what extent it is safe to operate without it. Methods We studied twenty patients with calvarial extra-axial lesions who underwent surgical interventions. All lesions were preoperatively located with both neuronavigation and the usual linear measurements. Both methods were compared regarding the time consumed to localize the tumor and the accuracy of each method to anticipate the actual center of the tumor. Results The mean error of distance between the planned center of the tumor and the actual was 6.50 ± 1.762 mm in conventional method, whereas the error was 3.85 ± 1.309 mm in IGS method. Much more time was consumed during the neuronavigation method including booting, registration, and positioning. A statistically significant difference was found between the mean time passed in the conventional method and IGS method (2.05 ± 0.826, 24.90 ± 1.334, respectively), P-value < 0.001. Conclusion In the setting of limited resources, the linear measurement localization method seems to have an accepted accuracy in the localization of calvarial extra-axial lesions and it saves more time than neuronavigation method.

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