Article
Dentistry, Oral Surgery & Medicine
Ibrahim Alaugaily, Adham A. Azim
Summary: This study aimed to identify the clinical and radiographic characteristics of cracked teeth and teeth with vertical root fracture (VRF), and to find the association between the type of fracture and other features. Patterns of bone loss on CBCT imaging can differentiate between cracked teeth and teeth with VRF.
JOURNAL OF ENDODONTICS
(2022)
Article
Health Care Sciences & Services
Wan-Chuen Liao, Chi-Hung Chen, Yu-Hwa Pan, Mei-Chi Chang, Jiiang-Huei Jeng
Summary: This article reviews the prevalence, characteristics, diagnosis and treatment methods of vertical root fractures in non-endodontically treated teeth and endodontically treated teeth. It found that most patients were over 40 years old, male patients had a higher prevalence in the non-endodontically treated group, and VRFNETT are more often observed in the Chinese population.
JOURNAL OF PERSONALIZED MEDICINE
(2021)
Review
Dentistry, Oral Surgery & Medicine
Angambakkam Rajasekharan PradeepKumar, Hagay Shemesh, Malli Sureshbabu Nivedhitha, M. Mohamed Jubair Hashir, Selva Arockiam, Tirupambaram Natarajasundaram Uma Maheswari, Velmurugan Natanasabapathy
Summary: This systematic review and meta-analysis included 8 articles, indicating that CBCT imaging has a sensitivity of 0.78, specificity of 0.80, and accuracy of 0.86 in diagnosing VRFs in root-filled teeth. The quality of evidence was low for sensitivity and moderate for specificity when CBCT imaging was used for the diagnosis of VRF.
JOURNAL OF ENDODONTICS
(2021)
Article
Dentistry, Oral Surgery & Medicine
Junghoon Lee, Sunil Kim, Euiseong Kim, Kyung-Ho Kim, Seong Taek Kim, Yoon Jeong Choi
Summary: This study evaluated the clinical performance of managing cracked teeth with reversible pulpitis through a combination of internal and external splinting. Bidirectional splinting successfully treated cracked teeth with reversible pulpitis, with pain on percussion being an important factor in deciding whether to attempt root canal treatment on symptomatic cracked teeth. A step-by-step approach with bidirectional crack splinting should be encouraged for cracked teeth with vital pulp without mechanical allodynia instead of preemptive root canal treatment.
INTERNATIONAL ENDODONTIC JOURNAL
(2021)
Article
Engineering, Multidisciplinary
Daniel Dias-da-Costa, Marcelo R. Carvalho, Milad Bybordiani
Summary: Many advanced methods have been developed for predicting discrete fracture within the finite element framework, with the goal of enhancing the continuous displacement field with a discontinuous part. These methods provide unprecedented versatility in discretising domains with prescribed and evolving boundaries, but can incur additional computational burden with global tracking schemes. A new method, the Cracked Zone Clustering Method (CZCM), is proposed to address these issues by introducing minimal enhanced degrees of freedom and decoupling the discretisation of bulk and cracks. Results show that CZCM can significantly reduce the required number of enhancement degrees of freedom while maintaining accuracy.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Dentistry, Oral Surgery & Medicine
Fei Lin, Ronald Ordinola-Zapata, Ning Ye, Haiping Xu, Alex S. L. Fok
Summary: This study investigated the fatigue behavior of restored teeth, specifically the mechanism of longitudinal dentinal cracking under cyclic mechanical loading, using finite element analysis (FEA) and the stress-life (S-N) approach. The results showed that debonding of the dentin-composite interface may occur prior to longitudinal cracking of dentin in root-filled teeth under cyclic loading. This research is significant as it allows for the evaluation of restoration designs for root-filled teeth using fatigue analysis and FEA.
Article
Engineering, Marine
Qin Dong, Geng Xu, Yaoyu Hu, Ziya Peng
Summary: The main objective of this paper is to investigate the residual strength of a cracked plate considering fatigue crack propagation under cyclic loading. Factors such as crack length, number of cycles, tensile/compressive cyclic loads, and out-of-plane deformation are considered in the study of residual strength. The numerical results provide insight into the effect of crack propagation on structural residual strength, aiming to guide the evaluation of residual strength in cracked components.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Construction & Building Technology
Yu-Cheng Kan, Ming-Gin Lee, Hung-Wei Lee
Summary: This paper investigates the behavior of fracture mechanics and fracture properties of epoxy-repaired concrete in Mode I fracture. The fracture toughness and fracture energy of the repaired concrete can be improved by epoxy resin and mortar, with both increasing with the amount of fine sand content in epoxy mortar up to the workability limit. The Mode I fracture behavior of the repaired concrete exhibits higher resistance to fracture and greater ductility compared to plain concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Mechanics
Jesbeer Kallungal, Laurent Chazeau, Jean-Marc Chenal, Jerome Adrien, Eric Maire, Claire Barres, Bernard Cantaloube, Patrick Heuillet, Fabian Wilde, Julian Moosmann, Timm Weitkamp
Summary: This study investigates the impact of Carbon Black agglomerates on crack propagation mechanisms in a Carbon black filled EPDM elastomer at different concentrations. The presence of these agglomerates can either cause fracture or arrest/deviation of crack, leading to higher energy dissipation and slower crack propagation speed.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Ha Jun Kim, Sangyoon Ji, Ju Yeon Han, Han Bin Cho, Young-Geun Park, Dongwhi Choi, Hoonsung Cho, Jang-Ung Park, Won Bin Im
Summary: Cracked tooth syndrome (CTS) is a common incomplete fracture of human teeth caused by chewing hard foods, and it is often difficult to diagnose accurately using conventional techniques. A novel method using mechanoluminescence phenomenon and phosphor particles has been developed for in vivo detection of tooth microcracks, providing high-resolution imaging of cracks through a stretchable and self-healable photodetector array. This technique utilizes a simple optical phenomenon to obtain precise information about the locations, depth, and length of tooth cracks, distinguishing it from traditional methods.
NPG ASIA MATERIALS
(2022)
Article
Mechanics
L. Wang, Y. J. Xie, H. Yuan
Summary: The potential fracture configurations of a cracked solid under mixed Mode-I/III loading were investigated using a three-dimensional energy-based model, which effectively captured the physical process of energy release induced by multiple cracks initiation. Four integral subintervals for J(i)-integral around a crack tip were suggested to maximize the energy release rate, and the four concerned energy-based driving forces were identified. The results theoretically predicted various potential fracture configurations for cracked solids under the mixed Mode-I/III loading, and agreed well with experimental results.
ARCHIVE OF APPLIED MECHANICS
(2023)
Article
Engineering, Multidisciplinary
Shuihua Zheng, Yankun Yu, Mianzhen Qiu, Liumin Wang, Dapeng Tan
Summary: This study investigates the vibration response and damage detection method of fluid-filled thin cylindrical shells under the fluid-structure interaction condition. The vibration response is derived using high-order partial differential equations and the wave propagation method, while crack effects are studied using fracture mechanical principles to construct a local flexibility matrix and a breathing linear spring model. Results show significant variations in displacement response caused by nonlinear excitations, decrease in local flexibility and natural frequency due to cracks, and the effectiveness of normalized input power flows as a damage detection method for the shell.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Dentistry, Oral Surgery & Medicine
Andreas Rathke, Henry Frehse, Beatrice Hrusa
Summary: The aim of this study was to investigate the effect of different post-luting systems on the resistance to vertical root fracture (VRF) and crack formation in root canal-treated teeth. The results showed that teeth restored with fiber-reinforced composite (FRC) or sandblasted titanium (Ti) posts successfully resisted VRF during chewing simulation, but there were significant differences in crack formation between the groups.
Article
Engineering, Mechanical
En-Hou Han, Zhiming Zhang, Jianqiu Wang
Summary: Penetrated cracks were discovered in 316LN stainless steel elbows in an auxiliary system of a Chinese nuclear power plant after 19 years of service. The cracked elbow, with a nominal diameter of 12 inches, was investigated for its chemical composition, hardness, microstructure, and residual strain to determine the root cause of the cracking. The results indicate that the heavily cold-worked elbow experienced stress corrosion cracking in the occluded primary water due to non-compliance with RCC-M M3317 for solution treatment prior to delivery.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Galvin Sim Siang Lin, Kiran Prabhakar Singbal, Tahir Yusuf Noorani, Raghavendra Penukonda
Summary: The study compared the VRF resistance of root canal-treated teeth instrumented with four different NiTi rotary file systems and classified dentinal crack patterns and directions using a new classification. The control group showed the highest resistance, followed by T-Pro and HyFlex, with a majority of cracks exhibiting Type 1 pattern and running buccolingually. Smaller file taper was found to increase the VRF resistance of root canal-treated teeth.
Article
Dentistry, Oral Surgery & Medicine
S. Patel, S. Harvey
Summary: The paper discusses the imaging chain involved in CBCT workflow, guidelines for before and after a CBCT scan, and a framework for a systematic, comprehensive and tailored CBCT radiographic report aimed at endodontists, clinicians, and radiologists reporting on CBCT scans of the dentoalveolar region.
INTERNATIONAL ENDODONTIC JOURNAL
(2021)
Review
Dentistry, Oral Surgery & Medicine
B. Bhuva, M. Giovarruscio, N. Rahim, K. Bitter, F. Mannocci
Summary: When restoring teeth after root canal treatment, factors to consider include residual tooth volume, tooth location, number of proximal contacts, timing of the definitive restoration, and presence of cracks. This review provides an updated overview of the clinical literature on the restoration of root filled teeth, focusing on the main factors influencing tooth and restoration survival.
INTERNATIONAL ENDODONTIC JOURNAL
(2021)
Review
Dentistry, Oral Surgery & Medicine
V. Nagendrababu, P. Abbott, H. F. Duncan, A. F. Fouad, C. Kruse, S. Patel, M. Pigg, D. K. Rechenberg, P. M. H. Dummer
Summary: Diagnostic accuracy studies play a crucial role in clinical practice and patient management. Inadequate reporting may lead to study bias. The PRIDASE guidelines aim to improve the accuracy and completeness of diagnostic accuracy studies in Endodontology.
INTERNATIONAL ENDODONTIC JOURNAL
(2021)
Editorial Material
Dentistry, Oral Surgery & Medicine
Maria Pigg, Henry F. Duncan, Venkateshbabu Nagendrababu, Paul Abbott, Ashraf F. Fouad, Casper Kruse, Shanon Patel, Dan-Krister Rechenberg, Paul M. H. Dummer
INTERNATIONAL ENDODONTIC JOURNAL
(2021)
Review
Dentistry, Oral Surgery & Medicine
Francesco Mannocci, Bhavin Bhuva, Miguel Roig, Maciej Zarow, Kerstin Bitter
Summary: This position statement by the European Society of Endodontology represents the expert consensus on the restoration of root filled teeth, providing evidence-based principles for clinicians to make decisions on post-endodontic restoration. A series of clinical recommendations are made based on discussions of key topics and evidence, with the intention to update the statement as further evidence emerges.
INTERNATIONAL ENDODONTIC JOURNAL
(2021)
Review
Chemistry, Physical
Germain Sfeir, Carla Zogheib, Shanon Patel, Thomas Giraud, Venkateshbabu Nagendrababu, Frederic Bukiet
Summary: Calcium silicate-based materials have gained popularity as root canal sealers due to their biocompatibility, antimicrobial properties, and certain bioactivity, but their higher solubility may impact their long-term sealing ability. Unlike conventional sealers, these sealers are hydraulic and require humidity for setting. Limited research has been conducted on the clinical outcomes of calcium silicate-based sealers, with current usage mainly based on clinical practices rather than recommendations or evidence.
Review
Dentistry, Oral Surgery & Medicine
Shanon Patel, Navid Saberi, Tiago Pimental, Peng-Hui Teng
Summary: Root resorption is the irreversible loss of dental hard tissue caused by odontoclastic action. It is undesirable and pathological in permanent teeth, and can occur internally or externally on the root. Regardless of its location, it can result in patient discomfort and premature tooth loss. Accurate diagnosis and management of root resorption are often challenging. This review aims to present the relevant literature and discuss future directions in diagnosis and management.
INTERNATIONAL ENDODONTIC JOURNAL
(2022)
Review
Dentistry, Oral Surgery & Medicine
Francesco Mannocci, Kerstin Bitter, Salvatore Sauro, Paolo Ferrari, Rupert Austin, Bhavin Bhuva
Summary: This narrative review discusses contemporary considerations and future research directions for the restoration of root filled teeth. Clinicians are increasingly aware of the interdependence of endodontic and restorative aspects in managing root filled teeth and the importance of these aspects for long-term survival. However, current research often overlooks the influence of occlusal factors on the longevity of root filled teeth. The clinical relevance of minimally invasive endodontic and restorative concepts is still controversial, but conceptually, they appear to be valid. Prospective clinical studies are needed to determine the efficacy of these treatment protocols.
INTERNATIONAL ENDODONTIC JOURNAL
(2022)
Review
Dentistry, Oral Surgery & Medicine
Ali Hilmi, Shanon Patel, Kazim Mirza, Johnah C. C. Galicia
Summary: Apical periodontitis is a chronic inflammatory response caused by microorganisms. Clinical examination and imaging techniques are relied upon for diagnosis, as radiographic images may not show pathological changes associated with AP. This review evaluated the efficacy of diagnostic imaging using histopathology as a reference standard. The findings suggest that periapical radiography has low consistency with histopathological assessment, while CBCT is more accurate.
INTERNATIONAL ENDODONTIC JOURNAL
(2023)
Review
Dentistry, Oral Surgery & Medicine
Shanon Patel, Gabriel Krastl, Roland Weiger, Paul Lambrechts, Leo Tjaderhane, Gianluca Gambarini, Peng-Hui Teng
Summary: This article represents the consensus of an expert committee convened by the European Society of Endodontology (ESE) on root resorption. It aims to provide authoritative information on the etiology, histopathology, clinical presentation, and management recommendations for root resorption based on current evidence and expert knowledge. The committee intends to update this statement as new evidence emerges.
INTERNATIONAL ENDODONTIC JOURNAL
(2023)
Article
Dentistry, Oral Surgery & Medicine
Shanon Patel, Francesc Abella, Kreena Patel, Paul Lambrechts, Nassr Al-Nuaimi
Summary: In this study involving 194 patients with 215 external cervical resorption (ECR) lesions, the majority of ECR cases were found incidentally on radiographic examination. ECR was most commonly detected in maxillary central incisors (21.4%) and mandibular first molars (10.2%). ECR presenting with symptoms and clinical signs were associated with pulp involvement and were more frequently seen in cases affecting multiple tooth surfaces.
INTERNATIONAL ENDODONTIC JOURNAL
(2023)
Article
Dentistry, Oral Surgery & Medicine
Shanon Patel, Samantha Hamer
Summary: The COVID-19 pandemic has had a major impact on dental care provision, leading to the implementation of specific measures to reduce aerosol generating exposure. The use of dental dam is essential for reducing the degree of exposure and potentially decreasing fallow time.
BRITISH DENTAL JOURNAL
(2021)