Comparison of Two Different Mini-Implant Position in Maxillary Incisors Intrusion (Cone Beam Study)

2021 ◽  
Vol 4 (2) ◽  
pp. 159-165
Author(s):  
Mohamed Salem ◽  
Esmail Hewy
Keyword(s):  
Cone Beam ◽  
Implant Position ◽  
Maxillary Incisors

CBCT image artefacts generated by implants located inside the field of view or in the exomass

2021 ◽  
pp. 20210092
Author(s):  
Husniye Demirturk Kocasarac ◽  
Lisa J Koenig ◽  
Gulbahar Ustaoglu ◽  
Matheus Lima Oliveira ◽  
Deborah Queiroz Freitas
Keyword(s):  
Regions Of Interest ◽  
Field Of View ◽  
Cone Beam ◽  
Implant Position ◽  
Cbct Image ◽  
Metal Artefact ◽  
Image Artefacts ◽  
Artefact Reduction ◽  
Titanium Zirconium ◽  
Zirconia Implant

Objectives: To compare artefacts in cone-beam computed tomography (CBCT) arising from implants of different materials located either inside the field-of-view (FOV) or in the exomass, and to test different image-acquisition parameters to reduce them. Methods: CBCT scans of a human mandible prepared with either a titanium, titanium-zirconium, or zirconia implant were acquired with the Planmeca ProMax utilizing FOV sizes of 8 × 5 cm and 4 × 5 cm, which placed the implant inside the FOV (8 × 5 cm) or in the exomass (4 × 5 cm). The scanning parameters considered three conditions of metal artefact reduction (MAR), disabled, low, and high, and two kVp levels (80 and 90). The standard deviation (SD) of grey values of regions of interest was obtained. The effects of implant material, implant position, MAR condition, kVp level, and their interactions were evaluated by Analysis of Variance (α = 5%). Results: The zirconia implant produced the highest SD values (more heterogeneous grey values, corresponding to greater artefact expression), followed by titanium-zirconium, and titanium. In general, implants in the exomass produced images with higher SD values than implants inside the FOV. MAR was effective in decreasing SD values, especially from the zirconia implant, only when the implant was inside the FOV. Images with 80 kVp had higher SD values than those with 90 kVp, regardless of the other factors (p < 0.05). Conclusions: Implants in the exomass lead to greater artefact expression than when they are inside the FOV. Special attention should be paid to scanning parameters that reduce metal-related artefacts, such as MAR activation and increasing kVp. This is especially important with a zirconia implant inside the FOV.

scholarly journals Evaluation of Apical Root Morphology of Maxillary Incisors using Cone Beam Computed Tomography in Brazilian Subpopulation: A Cross-sectional Study

2021 ◽  
Author(s):  
Cristiane Martins Rodrigues Bernardes ◽  
Luiz Eduardo Gregoris Rabelo ◽  
Cyntia Rodrigues DE Araújo Estrela ◽  
Orlando Aguirre Guedes ◽  
Brunno Santos DE Freitas Silva ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Root Morphology ◽  
Cross Sectional Study ◽  
Cone Beam ◽  
P Value ◽  
Sectional Study ◽  
Cross Sectional ◽  
Anterior Teeth ◽  
Maxillary Incisors

Introduction: The prevalence of Apical Root Resorption (ARR) after orthodontic treatment is high. It is associated with several factors, such as tooth group, type and duration of treatment, applied force and root morphology. Aim: To evaluate the apical root morphology of maxillary incisors in a Brazilian subpopulation using Cone Beam Computed Tomography (CBCT) images. Materials and Methods: In this retrospective and cross-sectional study, 400 maxillary incisors from 167 patients registered in the data base of Dental Radiology Clinics between January 2012 and April 2017 were analysed. The apical root configuration was verified by navigating 0.1 mm/0.1 mm, in the three planes, axial, coronal, and sagittal sections on CBCT images, from the root canal entrance to the apical foramen, as well as from the apical direction to the crown. The standard reference for apical root form corresponded to the long axis of the tooth. The root forms and their frequency were characterised according to the classification proposed by Levander and Malmgren (1988). The qualitative variables were analysed by the Chi-square test. The level of significance was p-value <0.05. Results: A total of 400 maxillary anterior teeth (central and lateral incisors; n=200 each) from 167 patients (101 women; mean age was 41.8±16.20 years) were analysed. The most common apical root form presented in the central incisors was the blunt root {99 (49.5%)}, followed by pipette-shaped root {69 (34.5%)}. The less frequent was the short root {13 (6.5%)} (p-value <0.001). In the lateral incisors, the highest frequency presented was lacerated root {111 (55.5%)}, followed by blunt root {47 (23.5%)}, and pipette- shaped root {37 (18.5%)} (p-value <0.001). Conclusion: Maxillary central incisors had a higher frequency of rhomboid (blunt) root morphology, while lateral incisors had a higher frequency of curved (lacerated) root form.

scholarly journals Quantitative Analysis of the Relationship between Maxillary Incisors and the Incisive Canal by Cone-Beam Computed Tomography in an Adult Population of Mangaluru

2021 ◽  
Vol 8 (2) ◽  
Author(s):  
Vaishnavi D ◽  
◽  
Harshitha V ◽  
Kishore K ◽  
◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Alveolar Bone ◽  
Root Resorption ◽  
Interindividual Variation ◽  
Cone Beam ◽  
Maxillary Incisor ◽  
Incisive Canal ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Maxillary Incisors

Background: Maxillary anterior teeth play a crucial role in aesthetics, phonetics, and mastication. For successful orthodontic treatment evaluating the morphology of the alveolar bone and incisive canal would help in avoiding root resorption, dehiscence, and fenestration. This study is aimed to research the configurational relationships among maxillary incisors, alveolar bone, and incisive canal through Cone Beam Computerated Tomography (CBCT). Methods: CBCT images of 35 orthodontic patients were evaluated for length of the canal (L); angles between the palatal plane and the maxillary alveolar border (01),the incisive canal (02), and maxillary incisor (03); distance from the right maxillary incisor to the incisive canal (D). All the measurements were performed on sagittal plane with the exception of (D) which was made on axial plane. Statistical analysis was performed on the above parameters using two sample test and Pearson’s correlation analysis. Results: There was no statistically significant difference between males and females for all the variables although there were large interindividual variation. There was a positive moderate correlation between 01 and 02 (0.480), 01 and 03 (0.487), 02 and 03 (0.345). The mean value for L and D were 10.38mm and 4.14mm respectively. Conclusion: There exists a large interindividual variability for incisive canal, proximity of incisors with that of incisive canal which could not be precisely predicted by the conventional cephalograms. The results of the study could be helpful clinically in planning orthodontic treatment for significant intrusion and retraction of maxillary incisors

Impact of Intraoperative Cone Beam Computed Tomography on Reduction Quality and Implant Position in Treatment of Tibial Plafond Fractures

2016 ◽  
Vol 37 (9) ◽  
pp. 977-982 ◽  
Author(s):  
Sven Yves Vetter ◽  
Finn Euler ◽  
Jan von Recum ◽  
Klaus Wendl ◽  
Paul Alfred Grützner ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Implant Position ◽  
Tibial Plafond ◽  
Tibial Plafond Fractures

scholarly journals Relationship between maxillary canine intra-alveolar position and maxillary incisor angulation: a cone beam computed tomography study

2011 ◽  
Vol 22 (2) ◽  
pp. 146-150 ◽  
Author(s):  
Carolina Baratieri ◽  
Ana Carolina Portes Canongia ◽  
Ana Maria Bolognese
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Sagittal Plane ◽  
Mixed Dentition ◽  
Cone Beam ◽  
Maxillary Incisor ◽  
Maxillary Canine ◽  
Significance Level ◽  
Maxillary Incisors ◽  
The Right

The aims of the present study were to evaluate the angulation and inclination of permanent maxillary incisors and to correlate the results to the intra-alveolar permanent maxillary canine position during mixed dentition, using cone beam computed tomography (CBCT). The subjects were 30 children aged 7 to 10 years in the inter-transitory period of mixed dentition (permanent incisors and first molars erupted; primary canines, first and second molars erupted; and permanent canines intraosseous). The CBCT scans were obtained and, using the Dolphin Imaging® software - version 11.0, 3D images were reconstructed and the measurements were performed. The angulation of the right and left lateral and central maxillary incisors was measured in relation to the sagittal plane and their inclination was measured in relation to the coronal plane. The intra-alveolar height of the right and left maxillary canines was measured from the cusp tip to the axial plane. Pearson's correlation at 5% significance level showed positive correlation between the canine height and the lateral incisor angulation. It was concluded that the intra-alveolar position of the maxillary canines has a direct influence on the angulation of maxillary incisors, especially the lateral incisors.

scholarly journals Management of invasive cervical resorption in maxillary incisors with cone-beam computed tomography: A case series

2021 ◽  
Vol 8 (1) ◽  
pp. 40
Author(s):  
IAnand Sherwood ◽  
Murugadoss Vaanjay ◽  
Ernest Prince ◽  
V Nivedha ◽  
J Evangelin
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Case Series ◽  
Cone Beam ◽  
Maxillary Incisors

scholarly journals Evaluation of cone beam computed tomography imaging in placed dental implants: comparison between multiplanar reconstruction and parasagittal images / Avaliação de imagens de tomografia computadorizada de feixe cônico em implantes instalados: comparação entre reconstrução multiplanar e imagens parassagitais

2021 ◽  
Vol 7 (4) ◽  
pp. 34811-34822
Author(s):  
Mariana Murai Chagas ◽  
Maria Alves Garcia Silva ◽  
Marcelo Gusmão Paraiso Cavalcanti
Keyword(s):  
Computed Tomography ◽  
Maxillary Sinus ◽  
Dental Implants ◽  
Cone Beam Computed Tomography ◽  
Anatomical Structure ◽  
Nasal Fossa ◽  
Cone Beam ◽  
Anatomical Structures ◽  
Implant Position ◽  
Inferior Alveolar Canal

This study aimed to compare multiplanar reconstruction (MPR) to parasagittal images of cone-beam computed tomography (CBCT) for localizing placed dental implants concerning adjacent anatomical structures (nasal fossa floor, maxillary sinus, inferior alveolar canal and nasopalatine canal).The CBCT exams of 164 placed implants were analyzed. All tomographic images were imported to Imaging Studio software to create parasagittal image templates. The images were randomized and analyzed by two oral and maxillofacial radiologists who classified whether or not there was perforation of the anatomical structure in question.According to Kappa coefficient of agreement, the results including, all anatomical structures for inter-observer assessment was 0.81 and for intra-observer assessment, 0.79 for observer one and 0.89 for observer two. For each anatomical structure, the agreement ranged from 'substantial' to 'almost perfect' (nasal fossa floor 0.72, nasopalatine canal 0.92, maxillary sinus 0.81, and inferior alveolar canal 0.81).  Based on our findings, there was substantial to almost perfect agreement when comparing MPR and parasagittal images of CBCT regarding of implant position relationship with anatomical structures. Since both modalities did not differ in implant position, and the MPR represents the complete and original volume that enables analysis in three dimensions, they can be the first-choice imaging modality to analyze placed dental implants.

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