Method of visualisation influences accuracy of measurements in cone-beam computed tomography

Patcas, Raphael; Angst, Christine; Kellenberger, Christian J.; Schätzle, Marc; Ullrich, Oliver; Markic, Goran

doi:10.1016/j.jcms.2015.05.001

Cited by 14 publications

(7 citation statements)

References 20 publications

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“…17 A recent study showed that multiplanar reformatted images are more suitable for linear measurements of calcified structures than are 3-D CBCT images. 18 Precision, Reproducibility, and Accuracy of Tomographic Bone Plate Level Measurements Recent studies have used higher resolution CBCT images from Accuitomo (J. Morita, Irvine, Calif) to evaluate alveolar bone and have concluded that this method of diagnosis is indicated when selecting the appropriate protocol. 19,20 Our study used the i-Cat Cone Beam 3-D Dental Imaging System (Imaging Sciences International), available at the institution where the project was developed.…”

Section: Discussionmentioning

confidence: 99%

Precision, reproducibility, and accuracy of bone crest level measurements of CBCT cross sections using different resolutions

Menezes

Janson

Massaro

et al. 2015

The Angle Orthodontist

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Objective: To evaluate the precision, reproducibility, and accuracy of alveolar crest level measurements on CBCT images obtained with different voxel sizes. Materials and Methods: CBCT exams were made of 12 dried human mandibles with voxel dimensions of 0.2, 0.3, and 0.4 mm. Bone crest level was measured directly on the mandibles with a digital caliper and on CBCT images. Images were measured twice by two examiners. Intra-and interexaminer precision and reproducibility were assessed using paired and t-tests, respectively. Accuracy was evaluated using t-tests. Results: Precision and reproducibility of bone crest level tomographic measurements was good for all voxel sizes evaluated. The images with 0.2-mm voxel size showed a decreased number of intraexaminer errors. A high accuracy for measurements of bone crest level was observed for all CBCT definitions, except for the mandibular incisors using the 0.4-mm voxel size. Conclusions: Precision and reproducibility of alveolar bone level measurements were good for various voxel sizes. CBCT images demonstrated good accuracy for 0.2-mm and 0.3-mm voxel sizes. The mandibular incisor region needs better resolution than that provided by 0.4-mm voxel size for bone crest level measurements. (Angle Orthod. 2016;86:535-542.)

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Section: Discussionmentioning

confidence: 99%

Precision, reproducibility, and accuracy of bone crest level measurements of CBCT cross sections using different resolutions

Menezes

Janson

Massaro

et al. 2015

The Angle Orthodontist

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“…The preoperative planning procedure reduces the time the patient is in surgery, although, compared to conventional techniques, the overall time needed for each patient remains the same. It is also important to point out that experience in planning is essential to minimise application errors 5,9 .…”

Section: Discussionmentioning

confidence: 99%

Guided biopsy of osseous pathologies in the jaw bone using a 3D-printed, tooth-supported drilling template

Valdec

Schiefersteiner

Rücker

et al. 2019

International Journal of Oral and Maxillofacial Surgery

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Suspicious radiological findings in the jaw bone require histopathological examination for the confirmation of a diagnosis. As pathologies in this region are difficult to reach or are in close proximity to relevant anatomical structures, e.g. tooth roots or nerves, they often represent a challenge. Such factors may adversely affect the predictability of the surgical outcome of a biopsy of the osseous tissues. This technical note introduces a novel method for performing a digitally planned, guided biopsy. For this purpose, a cone beam computed tomography scan and an intraoral scan are superimposed using specific planning software. The resulting three-dimensionally printed, tooth-supported drilling template is designed for a trephine biopsy. It allows a precise, minimally invasive approach, with an exact threedimensional determination of the biopsy location prior to surgery. The risk of devitalization of the neighbouring teeth or possible damage to the nerve structures can be minimized. Furthermore, a small access flap can be sufficient. In summary, the method of bone biopsy presented here allows high precision and greater predictability for biopsy sampling and is minimally invasive for the patient.

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“…The scanned images are capable to offer three-dimensional views of the explored structures [7,8]. This ability of the CBCT allows a better identification of the procedural accidents which occur during root canal treatments [9,10]. Perforations, broken instruments and ledge formations were easily detected on the scanned images by the evaluators.…”

Section: Discussionmentioning

confidence: 99%

Identification of the Procedural Accidents During Root Canal Preparation Using Digital Intraoral Radiography and Cone Beam Computed Tomography

Csinszka

Maria

Monea

et al. 2016

Acta Medica Marisiensis

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Crown or root perforation, ledge formation, fractured instruments and perforation of the roots are the most important accidents which appear during endodontic therapy. Our objective was to evaluate the value of digital intraoral periapical radiographs compared to cone beam computed tomography images (CBCT) used to diagnose some procedural accidents. Material and methods: Eleven extracted molars were used in this study. A total of 18 perforations and 13 ledges were created artifically and 10 instruments were fractured in the root canals. Digital intraoral periapical radiographs from two angles and CBCT scans were made with the teeth fixed in position. The images were evaluated and the number of detected accidents were stated in percentages. Statistical analysis was performed using the chi square-test. Results: On digital periapical radiographs the evaluators identified 12 (66.66%) perforations, 10 (100 %) separated instruments and 10 (76.9%) created ledges. The CBCT scans made possible the recognition of 17 (94.66 %) perforations, 9 (90 %) separated instruments and 13 (100%) ledges. The totally recognized accidental procedures showed significant differences between the two groups. (p<0.05) Conclusion: Digital periapical radiographs are the most common imaging modalities used during endodontic treatments. Though, the CBCT allows a better identification of the procedural accidents.

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Method of visualisation influences accuracy of measurements in cone-beam computed tomography

Cited by 14 publications

References 20 publications

Precision, reproducibility, and accuracy of bone crest level measurements of CBCT cross sections using different resolutions

Precision, reproducibility, and accuracy of bone crest level measurements of CBCT cross sections using different resolutions

Guided biopsy of osseous pathologies in the jaw bone using a 3D-printed, tooth-supported drilling template

Identification of the Procedural Accidents During Root Canal Preparation Using Digital Intraoral Radiography and Cone Beam Computed Tomography

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