scholarly journals Reject Rates of Radiographic Images in Dentomaxillofacial Radiology: A Literature Review

2021 ◽  
Vol 18 (15) ◽  
pp. 8076
Author(s):  
Andy Wai Kan Yeung ◽  
Natalie Sui Miu Wong
Keyword(s):  
Computed Tomography ◽  
Reference Lists ◽  
Web Of Science ◽  
Database Search ◽  
Cone Beam ◽  
Positioning Error ◽  
Exclusion Criteria ◽  
Radiographic Images ◽  
Academic Literature ◽  
Reject Analysis

This report surveyed the image reject rates of intra-oral, extra-oral, and cone-beam computed tomography (CBCT) imaging in the academic literature. PubMed, Web of Science, and Scopus databases were queried in mid-April 2021. Manual screening of the reference lists of the identified publications was performed to identify papers missed from the database search. All publications returned by the searches were initially included. Exclusion criteria included irrelevance, no reporting of reject rate, no access to the article, and not original article. The total number of images and the number of rejects were recorded for each type of radiographic images. Factors and commonest errors associated with the rejects were recorded. Twenty-six original articles were identified and reviewed. The average reject rate was 11.25% for bitewings, 16.38% for periapicals, 4.10% for panoramics, 6.08% for lateral cephalography, and 2.77% for CBCT. Positioning error and patient movement were two common reasons for the rejects. The average reject rates computed from data pooled across studies should form the reference values for quality assurance programs to follow. Future reject analysis studies should report more radiographic parameters such as type of collimation for intra-oral radiography and patient posture for CBCT.

scholarly journals Midbuccal Canals of Maxillary Molars Evaluated by Cone-Beam Computed Tomography: Endodontic Management of Two Cases

2013 ◽  
Vol 24 (6) ◽  
pp. 575-579 ◽  
Author(s):  
Manoel Brito-Junior ◽  
Gil Moreira-Junior ◽  
Joao Americo Normanha ◽  
Andre Luis Faria-e-Silva ◽  
Carla Cristina Camilo ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Anatomical Variations ◽  
Cone Beam ◽  
Precise Description ◽  
Radiographic Images ◽  
Second Molar ◽  
Root Canals ◽  
Maxillary Molars ◽  
Internal Configuration

Maxillary molars present variable root canal and root morphologies. This report describes the endodontic management of two cases of midbuccal canals found in maxillary molars. Midbuccal canals were present in a maxillary first molar with a single buccal root (Case 1), and in a maxillary second molar with three buccal roots (Case 2). An assessment of the internal configuration of these teeth was performed using cone-beam computed tomography (CBCT). Magnification with a dental operating microscope, surgical loupes, and the use of an endodontic explorer enabled the identification of the midbuccal canal orifices. The root canals in both cases were chemomechanically prepared and filled. Postobturation radiographic images revealed four (one midbuccal, two mesiobuccal and one palatal) and five (one midbuccal, two mesiobuccal, one distobuccal and one palatal) root canals, which were filled in Cases 1 and 2, respectively. Complex canal configurations of maxillary molars including the presence of midbuccal canals were presented. CBCT was a valuable tool in this diagnosis, as it provided a precise description of these unusual anatomical variations.

scholarly journals A Comparison of Cone Beam Computed Tomography and Periapical Digital Radiography for Evaluation of Root Canal Preparation

2021 ◽  
Vol 11 (14) ◽  
pp. 6599
Author(s):  
Khoa Van Pham
Keyword(s):  
Computed Tomography ◽  
Digital Radiography ◽  
Cone Beam Computed Tomography ◽  
Root Canal ◽  
Cone Beam ◽  
Root Canal Preparation ◽  
Radiographic Images ◽  
Digital Radiograph ◽  
Working Length ◽  
Before And After

The aim of the present study is to compare cone beam computed tomography and periapical digital radiography for the evaluation of root canal preparation. Nine extracted human molars were used in this study. Following access cavity preparation, mesio-buccal roots of maxillary and mesial roots of mandibular molars were prepared and the remaining roots were cut off. Three amalgam cavities were prepared on the coronal part of the teeth and were filled with amalgam to be used as landmarks. Specimens were scanned using cone-beam computed tomography and periapical digital radiograph images were obtained before and after root canal preparation. WaveOne Gold Primary was used for root canal preparation to full working length. Specimens were then scanned using CBCT and a periapical radiograph for the after-instrumentation images. The transportation and centering ratio were measured and calculated on the CBCT and periapical radiographic images. The Bland–Altman method was used for detecting the bias in the evaluation of agreement between the two methods’ measurements. There was agreement between the two methods’ measurements using CBCT scans and periapical digital radiographic images in the evaluation of transportation and centering ratio parameters. The two methods could be used interchangeably in measurements of transportation and calculating the centering ratio.

Assessment of Healing of a Large Radicular Cyst using Cone Beam Computed Tomography: Two Years Follow-up

2016 ◽  
Vol 7 (1) ◽  
pp. 47-50
Author(s):  
Abhay Taranath Kamath ◽  
Swathi Pai ◽  
Manish Bhagania ◽  
M Vidya Saraswathi
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Three Dimensions ◽  
Cone Beam ◽  
Radicular Cyst ◽  
Radiographic Images ◽  
Platelet Rich Fibrin ◽  
Cystic Cavity ◽  
Hollow Cavity

ABSTRACT Surgical enucleation of a radicular cyst is a common treatment in endodontics but the pretreatment planning and assessment of the post-treatment healing in the cystic cavity is of utmost importance. The advantage of cone beam computed tomography (CBCT) in endodontics is that it demonstrates anatomic features in three dimensions that is not possible with intraoral periapical (IOPA) and panoramic radiographic images. In this case report, a CBCT was done to evaluate the size and extent of the radicular cyst in the maxillary anterior region and was enucleated. Apicoectomy was done and the hollow cavity was filled with platelet rich fibrin. A postoperative CBCT was done 2 years later to assess the healing. Specific situations, both pre- and postoperatively, where the understanding of spatial relationships afforded by CBCT facilitates diagnosis, influences treatment and assess healing. How to cite this article Pai S, Kamath AT, Bhagania M, Shenoy N, Saraswathi MV. Assessment of Healing of a Large Radicular Cyst using Cone Beam Computed Tomography: Two Years Follow-up. World J Dent 2016;7(1):47-50.

scholarly journals Evaluation of maxillary bones using cone beam computed tomography: A systematic review

2021 ◽  
Vol 12 (1) ◽  
pp. 13-23
Author(s):  
Juliana Pinheiro ◽  
Luana Amorim Morais da Silva ◽  
Glória Maria França ◽  
Dennys Ramon De Melo Fernandes Almeida ◽  
Amanda Feitoza da Silva ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Systematic Review ◽  
Cone Beam Computed Tomography ◽  
Web Of Science ◽  
Dental Treatment ◽  
Low Cost ◽  
Cone Beam ◽  
Fast Method ◽  
Jaw Bones ◽  
Bibliographic Search

Cone beam computed tomography is widely used in dentistry, due to its easy accessibility, low cost and better accuracy compared to medical tomography. The present study aims to conduct a systematic review of the literature on the evaluation of jaw bones using cone beam computed tomography. A bibliographic search was performed in the electronic databases PubMed, Scopus, Embase and Web of Science. At the end of the analysis, 10 articles published between 1998 and 2015 were included. Cone beam computed tomography is a precise and fast method, used to evaluate digital images in high resolution, with sharpness, precision. In addition, the acquisition of these images is essential to measure bone elements, in quantity and quality. It should also be noted that the forecast of bone strength will depend on several factors, such as bone density and microarchitecture. Thus, the professional and reduces the likelihood of making mistakes, which interfere with the prognosis of dental treatment.

scholarly journals Artifacts related to cone beam computed tomography technology (CBCT) and their significance for clinicians: illustrated review of medical literature.

NEMESIS ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 1-29
Author(s):  
Raphael Olszewski
Keyword(s):  
Computed Tomography ◽  
Dental Implants ◽  
Cone Beam Computed Tomography ◽  
Experimental Studies ◽  
Field Of View ◽  
Cone Beam ◽  
Beam Hardening ◽  
Exclusion Criteria ◽  
Ring Artifact ◽  
Pubmed Database

Objective: to explain the meaning and to illustrate technical artifacts (aliasing as well as the ring artifact) and beam hardening (metal artifact) that can be present in the dentomaxillofacial cone beam computed tomography (CBCT), and to check the accessibility of free illustrations of these artifacts in medical publications. Material and methods: One observer applied five search equations using database PubMed. The exclusion criteria were: experimental studies, animal studies, studies not related to dentomaxillofacial area, and articles with closed access. There was no time limit for the search of articles. We limited our search to English and French language. Results: Only 3 articles out of 434 publications were retained after application of inclusion/exclusion criteria. In these articles only 4 annotated figures were freely accessible in medical publications from PubMed. In this paper we presented examples of aliasing, ring artifact, and beam artifacts from I-CAT, Carestream 9000 3D (Kodak), and Planmeca Promax 3D Mid CBCT. The intensity of beam hardening artifact varies from major degradation of image (i.e., subperiosteal implants, bridges, crowns, dental implants, and orthodontic fix appliances), through mean degradation (screws securing titanium mesh, head of mini-implant) to no beam hardening on metallic devices (orthodontic anchorage, orthodontic contention wire) or on dense objects (endodontic treatments, impression materials, Lego box). Some beam hardening artifacts arising from nasal piercing, hairs, or hearing aid device may be present on the image but they will not disturb the evaluation of the field of view. Conclusions: reduction of aliasing artifact is related with the improvement of detectors quality. The presence of ring artifact means that CBCT device has lost its calibration. The field of view (FOV) needs to be reduce in order to avoid scanning regions susceptible to beam hardening (e.g., metallic restorations, dental implants). Finally, the accessibility to open knowledge on technique -related CBCT artifacts seems extremely limited when searching at PubMed database.

scholarly journals A Noninvasive Method to Reduce Radiotherapy Positioning Error Caused by Respiration for Patients With Abdominal or Pelvic Cancers

2019 ◽  
Vol 18 ◽  
pp. 153303381982586
Author(s):  
Weifeng Li ◽  
Zhuoran Jiang ◽  
Kaiyue Chu ◽  
Jianhua Jin ◽  
Yun Ge ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Wilcoxon Test ◽  
Cone Beam ◽  
Positioning Error ◽  
Setup Error ◽  
Registration Error ◽  
Pelvic Tumors ◽  
Immobilization Device ◽  
Anterior Posterior

Purpose: To develop an infrared optical method of reducing surface-based registration error caused by respiration to improve radiotherapy setup accuracy for patients with abdominal or pelvic tumors. Materials and Methods: Fifteen patients with abdominal or pelvic tumors who received radiation therapy were prospectively included in our study. All patients were immobilized with vacuum cushion and underwent cone-beam computed tomography to validate positioning error before treatment. For each patient, after his or her setup based on markers fixed on immobilization device, initial positioning errors in patient left-right, anterior-posterior, and superior-inferior directions were validated by cone-beam computed tomography. Then, our method calculated mismatch between patient and immobilization device based on surface registration by interpolating between expiratory- and inspiratory-phase surface to find the specific phase to best match the surface in planning computed tomography scans. After adjusting the position of treatment couch by the shift proposed by our method, a second cone-beam computed tomography was performed to determine the final positioning error. A comparison between initial and final setup error will be made to validate the effectiveness of our method. Results: Final positioning error confirmed by cone-beam computed tomography is 1.59 (1.82), 1.61 (1.84), and 1.31 (1.38) mm, reducing initial setup error by 24.52%, 51.04%, and 53.63% in patient left-right, anterior-posterior, and superior-inferior directions, respectively. Wilcoxon test showed that our method significantly reduced the 3-dimensional distance of positioning error ( P < .001). Conclusion: Our method can significantly improve the setup precision for patients with abdominal or pelvic tumors in a noninvasive way by reducing the surface-based registration error caused by respiration.

scholarly journals Comparison of cone-beam computed tomography and periapical radiography for detecting simulated apical root resorption

2012 ◽  
Vol 83 (2) ◽  
pp. 189-195 ◽  
Author(s):  
Hongyu Ren ◽  
Jun Chen ◽  
Feng Deng ◽  
Leilei Zheng ◽  
Xiong Liu ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Root Resorption ◽  
Root Surface ◽  
Cone Beam ◽  
Radiographic Images ◽  
Apical Root Resorption ◽  
Periapical Radiography

ABSTRACT Objective: To compare the diagnostic accuracy between cone-beam computed tomography (CBCT) and periapical radiography for detecting simulated external apical root resorption (EARR) in vitro. Materials and Methods: The study sample consisted of 160 single-rooted premolar teeth for simulating EARR of varying degrees according to four setups: no (intact teeth), mild (cavity of 1.0 mm in diameter and depth on root surface), moderate (0.4 mm, 0.8 mm, 1.2 mm, and 1.6 mm root shortening), and severe (2.4 mm, 2.8 mm, 3.2 mm, and 3.6 mm root shortening). Two groups of radiographic images were obtained via CBCT and periapical radiography. The absence or presence and the severity for all resorption lesions were evaluated blindly by two calibrated observers. Results: With the CBCT method, the rates of correct classification of no, mild, moderate, and severe EARR were 96.3%, 98.8%, 41.3%, and 87.5%, respectively; with the periapical radiography method, the rates were 82.5%, 41.3%, 68.8%, and 92.5%, respectively. Highly significant differences were found between the two imaging methods for detection of mild (P &lt; .001), moderate (P &lt; .001), and all EARR (P &lt; .001). For detection of all EARR, the sensitivity and specificity values were 75.8% and 96.3% for CBCT, compared with 67.5% and 82.5% for periapical radiography. Conclusion: CBCT is a reliable diagnostic tool to detect simulated EARR, whereas periapical radiography underestimates it. However, if a periapical radiograph is already available to the diagnosis of EARR, CBCT should be used with extreme caution to avoid additional radiation exposure.

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