scholarly journals Accuracy of Dental Photography: Professional vs. Smartphone’s Camera

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Carol Moussa ◽  
Louis Hardan ◽  
Cynthia Kassis ◽  
Rim Bourgi ◽  
Walter Devoto ◽  
...  
Keyword(s):  
Digital Models ◽  
Linear Measurements ◽  
Distance Range ◽  
Anterior Teeth ◽  
Single Lens ◽  
Plaster Models ◽  
Dental Photography

There is a scant literature on the accuracy of dental photographs captured by Digital Single-Lens Reflex (DSLR) and smartphone cameras. The aim was to compare linear measurements of plaster models photographed with DSLR and smartphone’s camera with digital models. Thirty maxillary casts were prepared. Vertical and horizontal reference lines were marked on each tooth, with exception to molars. Then, models were scanned with the TRIOS 3 Basic intraoral dental scanner (control). Six photographs were captured for each model: one using DSLR camera (Canon EOS 700D) and five with smartphone (iPhone X) (distance range 16-32 cm). Teeth heights and widths were measured on scans and photographs. The following conclusions could be drawn: (1) the measurements of teeth by means of DSLR and smartphone cameras (at distances of at least 24 cm) and scan did not differ. (2) The measurements of anterior teeth by means of DSLR and smartphone cameras (at all distances tested) and scan exhibited no difference. For documentational purposes, the distortion is negligeable, and both camera devices can be applied. Dentists can rely on DSLR and smartphone cameras (at distances of at least 24 cm) for smile designs providing comparable and reliable linear measurements.

scholarly journals Tooth-size discrepancy: A comparison between manual and digital methods

2014 ◽  
Vol 19 (4) ◽  
pp. 107-113 ◽  
Author(s):  
Gabriele Dória Cabral Correia ◽  
Fernando Antonio Lima Habib ◽  
Carlos Jorge Vogel
Keyword(s):  
Three Dimensional ◽  
Diagnostic Tools ◽  
Tooth Size ◽  
Digital Models ◽  
Linear Measurements ◽  
Length Discrepancy ◽  
Technological Advances ◽  
Size Discrepancy ◽  
Digital Methods ◽  
Plaster Models

INTRODUCTION: Technological advances in Dentistry have emerged primarily in the area of diagnostic tools. One example is the 3D scanner, which can transform plaster models into three-dimensional digital models. OBJECTIVE: This study aimed to assess the reliability of tooth size-arch length discrepancy analysis measurements performed on three-dimensional digital models, and compare these measurements with those obtained from plaster models. MATERIAL AND METHODS: To this end, plaster models of lower dental arches and their corresponding three-dimensional digital models acquired with a 3Shape R700T scanner were used. All of them had lower permanent dentition. Four different tooth size-arch length discrepancy calculations were performed on each model, two of which by manual methods using calipers and brass wire, and two by digital methods using linear measurements and parabolas. RESULTS: Data were statistically assessed using Friedman test and no statistically significant differences were found between the two methods (P > 0.05), except for values found by the linear digital method which revealed a slight, non-significant statistical difference. CONCLUSIONS: Based on the results, it is reasonable to assert that any of these resources used by orthodontists to clinically assess tooth size-arch length discrepancy can be considered reliable.

The Accuracy and Reproducibility of Linear Measurements Made on CBCT-derived Digital Models

2016 ◽  
Vol 17 (4) ◽  
pp. 294-299 ◽  
Author(s):  
Mohammad Y Hajeer ◽  
Ahmad L Maroua ◽  
Mowaffak Ajaj
Keyword(s):  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Intraobserver Reliability ◽  
Altman Analysis ◽  
Digital Models ◽  
Linear Measurements ◽  
Bland Altman Analysis ◽  
Accuracy Of Measurements ◽  
The Mean ◽  
Plaster Models

ABSTRACT Objective To evaluate the accuracy and reproducibility of linear measurements made on cone-beam computed tomography (CBCT)-derived digital models. Materials and methods A total of 25 patients (44% female, 18.7 ± 4 years) who had CBCT images for diagnostic purposes were included. Plaster models were obtained and digital models were extracted from CBCT scans. Seven linear measurements from predetermined landmarks were measured and analyzed on plaster models and the corresponding digital models. The measurements included arch length and width at different sites. Paired t test and Bland–Altman analysis were used to evaluate the accuracy of measurements on digital models compared to the plaster models. Also, intraclass correlation coefficients (ICCs) were used to evaluate the reproducibility of the measurements in order to assess the intraobserver reliability. Results The statistical analysis showed significant differences on 5 out of 14 variables, and the mean differences ranged from −0.48 to 0.51 mm. The Bland–Altman analysis revealed that the mean difference between variables was (0.14 ± 0.56) and (0.05 ± 0.96) mm and limits of agreement between the two methods ranged from −1.2 to 0.96 and from −1.8 to 1.9 mm in the maxilla and the mandible, respectively. The intraobserver reliability values were determined for all 14 variables of two types of models separately. The mean ICC value for the plaster models was 0.984 (0.924–0.999), while it was 0.946 for the CBCT models (range from 0.850 to 0.985). Conclusion Linear measurements obtained from the CBCTderived models appeared to have a high level of accuracy and reproducibility. How to cite this article Maroua AL, Ajaj M, Hajeer MY. The Accuracy and Reproducibility of Linear Measurements Made on CBCT-derived Digital Models. J Contemp Dent Pract 2016;17(4):294-299.

scholarly journals Comparison of Linear Measurements and Analyses taken from Plaster Models and Three-dimensional Images

2014 ◽  
Vol 15 (6) ◽  
pp. 681-687 ◽  
Author(s):  
Mateus Rodrigues Tonetto ◽  
Matheus Coelho Bandéca ◽  
Mônica Barros Silva ◽  
Betina Grehs Porto ◽  
Thiago Soares Porto ◽  
...  
Keyword(s):  
Digital Images ◽  
Three Dimensional ◽  
Laser Scanner ◽  
San Jose ◽  
Digital Models ◽  
Linear Measurements ◽  
Treatment Plans ◽  
Three Dimensional Images ◽  
Plaster Model ◽  
Plaster Models

ABSTRACT Digital models are an alternative for carrying out analyses and devising treatment plans in orthodontics. The objective of this study was to evaluate the accuracy and the reproducibility of measurements of tooth sizes, interdental distances and analyses of occlusion using plaster models and their digital images. Thirty pairs of plaster models were chosen at random, and the digital images of each plaster model were obtained using a laser scanner (3Shape R-700, 3Shape A/S). With the plaster models, the measurements were taken using a caliper (Mitutoyo Digimatic®, Mitutoyo (UK) Ltd) and the MicroScribe (MS) 3DX (Immersion, San Jose, Calif). For the digital images, the measurement tools used were those from the O3d software (Widialabs, Brazil). The data obtained were compared statistically using the Dahlberg formula, analysis of variance and the Tukey test (p < 0.05). The majority of the measurements, obtained using the caliper and O3d were identical, and both were significantly different from those obtained using the MS. Intra-examiner agreement was lowest when using the MS. The results demonstrated that the accuracy and reproducibility of the tooth measurements and analyses from the plaster models using the caliper and from the digital models using O3d software were identical. How to cite this article Porto BG, Porto TS, Silva MB, Grehs RA, dos Santos Pinto A, Bhandi SH, Tonetto MR, Bandéca MC, dos Santos-Pinto LAM. Comparison of Linear Measurements and Analyses taken from Plaster Models and Three-dimensional Images. J Contemp Dent Pract 2014;15(6):681-687.

scholarly journals Digital models and orthodontic diagnosis: what degree of reliability?

2021 ◽  
Vol 8 ◽  
Author(s):  
ABDOUL Hafizou RABE ◽  
Fatima SALEK ◽  
Intissar El IDRISSI ◽  
Fatima ZAOUI ◽  
Hicham BENYAHIA
Keyword(s):  
Systematic Review ◽  
Numerical Models ◽  
Meta Analysis ◽  
Physical Models ◽  
Cochrane Library ◽  
Digital Models ◽  
Significant Difference ◽  
Clinically Significant ◽  
Conventional Models ◽  
Plaster Models

Abstract  Background: Our study aims to evaluate, through a systematic review, the reliability of numerical models compared to conventional models on the main parameters of orthodontic diagnosis  Method: four databases were consulted: PubMed; Google Scholar, Cochrane Library, and Ebscohost. The research included published studies since 2010, meta-analysis studies, randomized and non-randomized controlled trials, prospective and retrospective studies. Results: Among 3811 selected references, only five studies met our inclusion criteria. In the systematic review, there were statistical differences between the digital models and the plaster models. However, this difference is clinically acceptable. On the other hand, there are some limitations, relative to the types of the severity of the congestion, the elapsed time to digitize, and the numerical means. Conclusion: The results of our systematic review have shown that there is no clinically significant difference between the numerical and physical models for the majority of diagnostic parameters.

Dental Photography: a Practical Guide

Dental Update ◽  
2020 ◽  
Vol 47 (10) ◽  
pp. 802-811
Author(s):  
Louis Mackenzie ◽  
Mike Sharland
Keyword(s):  
Clinical Practice ◽  
Virtual Patient ◽  
Dental Practice ◽  
Clinical Images ◽  
Face To Face ◽  
Single Lens ◽  
Practical Guidance ◽  
Remote Patient ◽  
Technological Improvements ◽  
Dental Photography

The use of photography in dentistry is well established. Progressive technological improvements and dedicated training and practice in the use of specialized dental photography equipment enables novice clinical photographers to quickly become as proficient as experienced experts. The range of applications for dental photography continues to grow and may enhance the assessment, diagnosis and management of the majority of patients. Digital single lens reflex (DSLR) cameras, coupled with macro lenses and specialized flashes, may predictably be expected to deliver the highest quality clinical images. As mastery of dental photography requires optimization of equipment, settings and photographic techniques, this article is designed to provide detailed practical guidance for clinicians wishing to incorporate dental photography as a routine component of clinical practice and to provide guidance on optimizing the use of photography to enhance remote patient consultations. CPD/Clinical Relevance: Dental photography has an important role in optimizing face-to-face and virtual patient care in contemporary general dental practice.

scholarly journals Comparative Study of Concordance of Digital Models, Plaster Models, and 3D Printed Filament Models with Clinical Measurements in Children

2020 ◽  
pp. 1-11
Author(s):  
Hugo Ricardo ROSIN
Keyword(s):  
Intraclass Correlation ◽  
Reference Method ◽  
Mixed Dentition ◽  
Digital Models ◽  
Dental Measurements ◽  
Permanent Molars ◽  
3D Printed ◽  
Clinical Measurements ◽  
Plaster Models ◽  
Trios Scanner

Objective: The present study aimed to evaluate, in pediatric patients, the concordance of intraoral scanner for dental measurements, comparing the measurements obtained clinically with digital models, 3D printed filament models, and conventional plaster models. Materials and Methods: For this study, 31 patients with mixed dentition were selected, with at least the upper central incisors and upper first permanent molars erupted. The dental size measurement obtained with 3Shape Trios Scanner was compared with that obtained clinically with the aid of a digital caliper, as well as the measurements made with plaster models and filament printed models. For data analysis, the intraclass correlation coefficient (ICC) was performed and the agreement was categorized according to it. The Bland–Altman analysis was also applied to the data to graphically display the concordance. Results: There was no difference in agreement between measurements made in plaster and filament models compared to the reference method, and for measurements in the digital model, the agreement was low or zero in the molar region. Conclusion: According to the present study, we can conclude that both plaster and filament models presented values that are faithful to those obtained clinically and that the evaluated region affected the agreement with the reference method.

scholarly journals Analysis of the Sagittal Root Angle and Its Correlation With Hard and Soft Tissue Indices in Anterior Teeth for Immediate Implant Evaluation - A Retrospective Study

2021 ◽  
Author(s):  
Mengru Shi ◽  
Xiaoshuang Wang ◽  
Peisheng Zeng ◽  
Haiwen Liu ◽  
Zhuohong Gong ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Alveolar Bone ◽  
Bone Thickness ◽  
Root Angle ◽  
Implant Placement ◽  
Anterior Teeth ◽  
Immediate Implant ◽  
Palatal Bone ◽  
Additional Reference ◽  
Plaster Models

Abstract Background: To assess the root angle characteristics of maxillary incisors, and to analyze the relationship between the root angle and other implant-related anatomical indices to use the sagittal root angle as an index for immediate implant evaluation and design. Methods: A random sample consisting of 400 cone-beam computed tomography (CBCT) images and 65 maxillary plaster models were selected for the present study. CBCT and stereolithography (STL) scan images were imported as DICOM files into coDiagnostiX software for matching the hard and soft tissue. The angle between the long axis of the anterior tooth and the corresponding alveolar bone and implant-related hard and soft tissue indices were measured in the sagittal section. Descriptive statistics, frequency analysis, multi-level comparisons, and correlation analyses were performed. Results: The average sagittal root angles were 15° at the central incisor and 19° at the lateral incisor. The root angle in males was significantly larger than that in females, and increased with age. The largest angle, 22.35º, was found in the lateral incisors of the oldest (> 50 years old) male group. The root angle was found to correlate with coronal buccal bone thickness, coronal palatal bone thickness, apical buccal bone thickness, palatal bone thickness, and the below apex bone thickness. Conclusions: The sagittal root angle could reflect the distribution of other implant-related anatomical indices, which may provide additional reference for the evaluation of immediate implant placement.

scholarly journals Stability Analysis of Bitemarks in Different Conditions of Time and Temperature and Its Reliability as Evidence in Criminal Investigations

2019 ◽  
Vol 30 (3) ◽  
pp. 295-302
Author(s):  
Laís Gomes de Araújo ◽  
Tamara Soledad Frontanilla Recalde ◽  
Victor Jacometti ◽  
Paula Barreto Costa ◽  
Ricardo Henrique Alves da Silva
Keyword(s):  
Significant Influence ◽  
Storage Temperature ◽  
Time Intervals ◽  
Criminal Investigations ◽  
Bite Marks ◽  
Anterior Teeth ◽  
Time Period ◽  
The Stability ◽  
Short Time ◽  
Plaster Models

Abstract The objective of this study was to evaluate the stability of bite marks in foods in different conditions of time and temperature and their reliability as evidenced in criminal investigations. Sampling came from 20 subjects, who were instructed to bite five pieces of cheese and five pieces of chocolate. Bites were produced by the anterior teeth, from canine to canine, and the volunteers had their dental arches molded to obtain plaster models that were used for later comparison. The samples produced by each participant were stored and analyzed according to the temperature (room and refrigerator) and time period (immediately after, three days, seven days). The linear model with mixed effects using R Core Team and SAS Statistical Software were used for the statistical analysis. The results of this study reveal that the storage temperature of these materials does not exert a significant influence. Both chocolate and cheese showed better results when measurements were made shortly after, however the chocolate showed to be more stable in longer periods of time. By means of this study, it was possible to demonstrate that the storage temperature does not exert a significant influence. However, the bite marks found in foods with greater dimensional stability and short time intervals, are more reliable and allow their use as evidence in criminal investigations. Still, due to the limitations presented, we recommend its use for the exclusion of possible suspects and not for the suspects identification.

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