Effect of intracanal posts on dimensions of cone beam computed tomography images of endodontically treated teeth (original) (raw)
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Dentistry Journal
Background: The remaining dentinal thickness is a significant factor to deal with when planning post-endodontic treatment. Aim: To assess the changes in the root canal dentinal thickness of intact and endodontically treated teeth using CBCT scans in the coronal, middle, and apical third of the root canal. Material and methods: Three hundred CBCT scans for three age groups were analyzed to study the dentinal thickness pre- and post-endodontic treatment. The dentinal thickness (DT) was measured along the buccal, mesial, distal, and lingual/palatal walls from the inner surface of the root canal to the outer surface in mm. Statistical analysis was set at 0.05. Results: The results of this study showed that the buccal, palatal, distal, and mesial dentinal thickness in intact and endodontically treated teeth is different. The differences were statistically significant when comparing the parameters of “healthy” and “treated” teeth (p < 0.05). There were no statistically significant diff...
The Fit of Tapered Posts in Root Canals Luted with Zinc Phosphate Cement: A Histological Study.
KEYWORDS Film thickness; Post; Zinc phosphate cement Summary Objectives. Stress transmission to the root through passive fitting dental posts is partly influenced by the thickness of the cement layer between the post and the prepared root canal surface as well as the fit of the post in the root canal. The objective of this study was to compare the cement gap between the post surfaces and the root canals using five prefabricated, tapered, unthreaded titanium posts of different manufacturers, without and with cement. Methods. Following the endodontic treatment with hand instruments of 100 intact anterior teeth, post spaces were prepared using opening drills of the corresponding size of post. Fifty posts were cemented with zinc phosphate cement into the roots for each system while another 50 posts were inserted into the canal without using the cement. After histological sectioning, the cement gap was measured at six sites for three times at the coronal, middle and apical regions between the root canal wall and the post surface under a light microscope before and after cementation. Results. Before cementation, the highest overall cement gap was observed with the Dr Mooser post system w (46 mm) and the lowest with the Velva post system w and Cylindro-Conical system w (30 mm). Significantly less (P!0.05) mean cement gap was observed with respect to the Erlangen post system w (41 mm), the Dr Mooser post system w (48 mm), the MP Pirec post system w (34 mm) and Velva post system w (33 mm) when compared with the Cylindro-Conical system w (62 mm). The Cylindro-Conical system w (79, 61 mm) and MP Pirec post system w (25, 24 mm) demonstrated no significant difference (PO0.001) compared with Velva-Post w (38, 20 mm) at the coronal and middle part, respectively (Mann-Whitney U-test, Boneferroni correction). Significant differences (P!0.001) were observed between the cement gap at the coronal and apical part for the Cylindro-Conical system w (79, 46 mm), Dr Mooser post system w (45, 56 mm) and MP Pirec post system w (25, 52 mm). After cementation, Dental Materials (2005) 21, 787-793 www.intl.elsevierhealth.com/journals/dema 0109-5641/$ -see front matter Q (M. Özcan).
Scanning, 2022
Cone-beam computed tomography (CBCT) imaging artifacts can hinder accurate diagnosis of several conditions. The aim of this study was to quantify CBCT artifacts created by nonmetallic root canal filling materials using two fields of view (FOV). Root canals of twenty extracted maxillary central incisors (n = 20) were instrumented and randomly divided into four equal groups: canals in Group 1 were filled with gutta-percha, canals in Group 2 with mineral trioxide aggregate (MTA) and gutta-percha, canals in Group 3 with gutta-percha and glass-fiber posts, and canals in Group 4 with MTA and glass-fiber posts. Each tooth was mounted on a silicon block and scanned three times using a CBCT machine, first with a prefilling scan (control) and then with postfilling scans, using two different FOV (40∗50 mm and 80∗50 mm). Imaging software was used to measure grayscale pixel values of canal cross sections. Data were analyzed using t-test and paired t-test statistical tests, with statistical signi...
Effect of root canal filling materials on dimensions of cone-beam computed tomography images
Journal of Applied Oral Science, 2012
from original root specimens and cone-beam computed tomography (CBCT) images. Material and Methods: Seventy-two human maxillary anterior teeth were prepared up to an ISO #50 K-File 1 mm short of the apical foramen. Thus, the teeth were randomly divided LQWR JURXSV DFFRUGLQJ WR WKH URRW FDQDO ¿OOLQJ PDWHULDO 6HDODSH[ ® , Sealapex ® +guttapercha points, Sealer 26 ® , Sealer 26 ® +gutta-percha points, AH PlusTM, AH PlusTM+guttapercha points, Grossman Sealer, and Grossman Sealer+gutta-percha points. After root canal preparation and RCF, CBCT scans were acquired and the specimens were sectioned in axial, sagittal and coronal planes. The RCF measurements were obtained in different planes and thicknesses to determine the discrepancy between the original root specimens (using a digital caliper) and the CBCT images (using the scanner's proprietary software). One-way DQDO\VLV RI YDULDQFH DQG 7XNH\ WHVWV ZHUH XVHG IRU VWDWLVWLFDO DQDO\VHV 7KH VLJQL¿FDQFH OHYHO was set at D 5HVXOWV 0HDVXUHPHQWV RI WKH GLIIHUHQW HQGRGRQWLF ¿OOLQJ PDWHULDOV ZHUH 9% to 100% greater on the CBCT images than on the original root specimens. Greater RCF GLPHQVLRQV ZHUH IRXQG ZKHQ RQO\ VHDOHUV ZHUH XVHG ZLWK VWDWLVWLFDOO\ VLJQL¿FDQW GLIIHUHQFH among the groups. Conclusions: RCF dimensions were greater on CBCT images than on the original root specimens, especially when only sealer was used.
Objective The aim of this study was to perform an integrative review on the layer thickness and microstructure of resinmatrix cements around custom-made or standard teeth root intracanal posts. Materials and methods An electronic search was conducted on the PubMed using a combination of the following scientific terms: intraradicular post, root intracanal post, resin cement, thickness, adaptation, endodontic post, layer thickness, fit, shape, and endodontic core. The literature selection criteria accepted articles published in the English language, up to May 2021, involving in vitro analyses, meta-analyses, randomized controlled trials, and prospective cohort studies. Results The search identified 154 studies, of which 24 were considered relevant to this study. The selected studies provided important data considering cement layer thickness, tooth preparation, endodontic post, and type of resin-matrix cement. The anatomical variability of root canal systems, such as the oval-or C-shaped, represents a challenge in dental restoration with tooth root intracanal posts. The fitting of intracanal posts to different root regions is variable resulting in thick and irregular layers of resin-matrix cement. Defects like pores, micro-cracks, and micro-gaps were detected in the resin-matrix cement microstructure and represent spots of stress concentration and fracture. Custom-made tooth root intracanal posts provide a proper fitting and decrease the layer thickness of resin-matrix cement. Conclusions In fact, the layer thickness of resin-matrix cements depends on the fitting of endodontic posts to tooth root canals. An increase of resin cement thickness causes the appearance of defects like pores, micro-cracks, and micro-gaps that can induce stress concentration and fractures at interfaces. Clinical relevance The fitting of the endodontic post into the teeth root canal determine the layer thickness of the resin-matrix cement to establish an adequate retention. However, the increase in the thickness of the resin-matrix cement layer can lead to a high number of defects like pores or cracks and therefore decrease the strength of the interface.
Various application’s of cone beam computed tomography in dentistry: A review
IP Annals of Prosthodontics and Restorative Dentistry
To get the volumetric data of the maxillary and the mandibular dental arches, the teeth itself, the morphology of the bone, to get the imaging and extent of the bony defects that too with low radiation, cone beam computed tomography plays a major role. CBCT is very much helpful in detecting the three dimensional view of the alveolar bone, helpful in getting the quite accurate extent of the bony defects, helpful in some of the difficult cases of root canal treatment where the dentist is not been able to find the actual curvature of the canal or where the accessory canal has been missed from the primary canal. This technique cone beam computed tomography provides the image to the dentist with minimal of distortion.
Endodontic applications of cone beam computed tomography: case series and literature review
2015
Cone beam computed tomography (CBCT) is a relatively new method that produces three-dimensional (3D) information of the maxillofacial skeleton, including the teeth and their surrounding tissue, with a lower effective radiation dose than traditional CT scans. Specific endodontic applications for CBCT are being identified as the use of this technology becomes more common. CBCT has great potential to become a valuable tool for diagnosing and managing endodontic problems, as well as for assessing root fractures, apical periodontitis, resorptions, perforations, root canal anatomy and the nature of the alveolar bone topography around teeth. This article aims to review cone beam technology and its advantages over CT scans and conventional radiography, to illustrate current and future clinical applications in endodontic practice, and to highlight areas of further research of CBCT in endodontics. Specific case examples illustrate how treatment planning has changed with the images obtained wi...
Evidence-Based Endodontics
Cone beam computed tomography (CBCT) has become a common diagnostic method in endodontics. However, the current literature provides insufficient information about different aspects that are related to the use of CBCT, such as: the efficacy of CBCT to support the practitioner's clinical decision making and to affect treatment outcomes; about the required training of the practitioner so he can efficiently examine the entire region that appears in the CBCT scan and diagnose abnormalities or possible pathologies; and on the long-term health risks associated with the use of CBCT in endodontics. In addition, CBCT has the strong potential to be used for accurate diagnosis of complete and uneventful healing. In this thematic series, we call for manuscripts that discuss aspects of the use of CBCT in endodontics.
Cone Beam Computed Tomography Imaging in Clinical Endodontics – Literature Review
Dental and Medical Problems, 2013
Cone beam computed tomography (CBCT) is widely used in dentistry due to low radiation, high-quality digital reconstruction of three-dimensional image, the elimination of the overlapping of structures which lie along the same axis, the possibility of obtaining real shaped images and enabling accurate measurements of the examined anatomical structures. Three-dimensional imaging of the structures of the stomatognathic system is most commonly implemented in endodontics, implantology and periodontics. The CBCT technique is used in endodontics primarily to detect anatomical abnormalities, visualise the root canal system, disclose additional canals, detect perforations and vertical root fractures, diagnose periapical lesions caused by inflammation of the pulp, identify and locate root resorption, clarify the reasons for the lack of healing of endodontically treated teeth. An important advantage of CBCT over conventional radiography is the fact that CBCT enables an exact visualisation of th...