Diagnosis of alveolar and root fractures in macerated canine maxillae: a comparison between two different CBCT protocols

Kobayashi-Velasco, Solange; Salineiro, Fernanda Cristina Sales; Gialain, Ivan Onone; Cavalcanti, Marcelo Gusmão Paraíso

doi:10.1259/dmfr.20170037

Cited by 8 publications

(6 citation statements)

References 49 publications

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“…In general, the authors report that images obtained with smaller voxel sizes are more accurate for the diagnosis of these conditions. In contrast, Kobayashi-Velasco et al 17 and Sönmez et al 18 who evaluated the influence of the voxel size on the diagnosis of root and alveolar fracture and diagnosis of external root resorption, respectively, did not observe the influence of voxel size in their studies. Considering the possible presence or absence of voxel size influence on diagnostic tasks, the present study was developed to evaluate whether voxel size interferes with the accuracy of linear measurements on CBCT images.…”

Section: Discussionmentioning

confidence: 90%

“…The lack of influence on the diagnosis may be associated with the acquisition of images that present enough high spatial resolution, as it happened in the studies by Kobayashi-Velasco et al 17 and Sönmez et al, 18 in which the authors did not observe the influence of voxel size in the detection of conditions. However, the largest voxel used in these studies was 0.20 mm.…”

Section: Discussionmentioning

confidence: 98%

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Influence of Voxel Size on CBCT Images for Dental Implants Planning

Kehrwald¹,

Castro²,

Salmeron³

et al. 2021

Eur J Dent

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Objective This study was developed to evaluate the influence of voxel size on bone measurements for implant planning. Materials and Methods The research was performed by using edentulous synthetic human mandibles with different levels of bone resorption. For each mandible, height and bone thickness were measured with a digital caliper. The PaX-i3d device was used to acquire the volumes of the five mandibles, with 50kVp, 4 mA, and a voxel size of 0.08 mm. After the acquisition, the images were reconstructed in the software CS three-dimensional Imaging, with four different sizes of voxels: 0.1, 0.2, 0.3, and 0.4 mm. All volumes were analyzed by a single evaluator who performed measurements to obtain bone height and thickness, using the reference points that were considered in obtaining the gold standard. The data were analyzed by ANOVA with a significance level of 5%. Results There was no significant difference in the measurements obtained with different voxel sizes, both for bone height measurements and bone thickness. There was no statistically significant difference in measurements in thickness in comparison to the gold standard. Conclusion When necessary, to measure height and bone thickness, it is possible to recommend voxel images of larger size (0.40 mm) without compromising the quality of the patient's clinical planning.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 98%

Influence of Voxel Size on CBCT Images for Dental Implants Planning

Kehrwald¹,

Castro²,

Salmeron³

et al. 2021

Eur J Dent

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“…Although systematic reviews have reported that the sensitivity and specificity of CBCT are about 75% to 84% and 64% to 65%, respectively (Chang et al, 2016;Talwar et al, 2016), a more recent study detected 24% sensitivity when analysing unmanipulated radiographic images and 80% sensitivity for volumetric analysis, demonstrating a good ability to identify VRF (Aristizabal-Elejalde et al, 2020). Of note, we used a voxel of 0.2 mm, as recommended by other studies (Hassan et al, 2009;Kobayashi-Velasco et al, 2017;Wenzel et al, 2009). Wenzel et al (2009) and Özer (2011), when comparing voxel tomographs with 0.12 and 0.25 mm and 0.1 and 0.19 mm, respectively, did not detect statistical differences.…”

Section: Discussionmentioning

confidence: 99%

Detection of vertical root fractures in the presence of artefacts by digital radiography and cone beam computed tomography

Carvalho

Spinelli

Mendonça

et al. 2021

RSD

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The correct diagnosis of vertical root fractures (VRF) in the presence of artifacts is a challenge for clinicians and endodontists. Moreover, there is controversy about which imaging technique is best for this purpose. In an in vitro model, we evaluated the diagnosis of VRF in teeth treated endodontically with and without intraradicular metal posts, using the Clark technique and cone beam computed tomography (CBCT), as well as the interference of artifacts with the diagnosis. Twenty-two first or second maxillary or mandibular premolars were included. Teeth were randomly allocated to three groups: G1 (two teeth without fracture with endodontic treatment and one with an intraradicular metal post); G2 (10 fractured teeth with endodontic treatment); and G3 (10 fractured teeth with endodontic treatment plus a metal post). The examiners recorded the presence or absence of fracture and its location and classified its type. There was no statistically significant difference between image acquisition systems. When differentiating the teeth (first vs. second premolars), there was a statistically significant difference among the examiners (p=0.020). However, when comparing the values obtained by the examiners regarding the visualization of the fracture site as well as the presence of fracture correlated with the presence of a metal post and angulation, there were no statistically significant differences (p>0.05). Digital radiographs and CBCT were similar for the diagnosis of VRF. High sensitivity was observed by CBCT image reconstructions. Therefore, the presence of metal posts generated artifacts, resulting in low sensitivity, specificity and accuracy.

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“…FOV büyüdükçe, sabit olan matriks içindeki piksellerin boyutları geniĢler ve görüntünün geometrik çözünürlüğü azalır. 5,11 Matriks sayısını değiĢtirmeden geometrik çözünürlüğün azalması önlenmek istenildiğinde, odaklama (zooming) adı verilen ve incelenecek objenin bir bölümüne yönelik netleĢtirme (fokuslama) uygulaması yapılabilir. 12 DĠġ HEKĠMLĠĞĠNDE DĠJĠAL GÖRÜNTÜLEME SĠSTEMLERĠ DiĢ hekimliğinde geleneksel radyografi uygulamaları önemini korumakla birlikte, dijital radyografinin sağladığı avantajlar diĢ hekimlerinin dijital radyografiye olan ilgisini artırmakta ve günümüzde dijital sistemler konvansiyonel sistemlerin yerini almaktadır.…”

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Di̇ş Heki̇mli̇ği̇nde Di̇ji̇tal Görüntüleme Si̇stemleri̇

Çağlayan¹,

Harorlı²

2019

Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi

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Radyoloji alanında ortaya çıkmıĢ en önemli geliĢmelerden birisi, radyografi iĢleminin dijital ortamda gerçekleĢmeye baĢlamasıdır. Dijital radyografinin sağladığı avantajlar diĢ hekimlerinin dijital radyografiye olan ilgisini artırmakta ve günümüzde dijital sistemler konvansiyonel sistemlerin yerini almaktadır. Dijital sistemlerin hızla yaygınlaĢmasının en önemli nedenleri, görüntüye hızlı ulaĢılması, görüntünün kalitesi ve görüntünün saklanması ve iletilmesinin kolay olmasıdır. Dijital radyolojide konvansiyonel yöntemlerde kullanılan filmlerin yerini görüntü alıcılar yani sensörler alır. Dijital görüntülemede kullanılan sensör sistemleri, x-ıĢınına geleneksel filmlerden daha hassastır ve dinamik aralıkları daha geniĢtir. Bu nedenlerle dijital görüntü elde etmek için daha az radyasyon dozuna ihtiyaç duyulur. Bu makalenin amacı, diĢ hekimliğinde kullanılan indirekt, yarı direkt ve direkt dijital görüntüleme sistemleri ve bu sistemlerde kullanılan fosfor plaklar, CCD (Charged-Coupled-Device), CMOS (Complementary Metal Oxide Semiconducter) ve Flat Panel Dedektörler hakkında bilgi vermektir. Ayrıca dijital imajların kalitesini etkileyen faktörleri irdelemektir.

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Diagnosis of alveolar and root fractures in macerated canine maxillae: a comparison between two different CBCT protocols

Abstract: Our findings demonstrated that the elected protocol for the diagnosis of root and alveolar fractures was N. This protocol allowed similar diagnosis results than HD protocol; however, with a lower amount of radiation exposure for the patient (5.6 mGy for N vs 7.0 mGy for HD).

Cited by 8 publications

References 49 publications

Influence of Voxel Size on CBCT Images for Dental Implants Planning

Influence of Voxel Size on CBCT Images for Dental Implants Planning

Detection of vertical root fractures in the presence of artefacts by digital radiography and cone beam computed tomography

Di̇ş Heki̇mli̇ği̇nde Di̇ji̇tal Görüntüleme Si̇stemleri̇

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