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crack tooth

X P Luo, Y Yuan, Y J Shi, D D Qian
Objective: To evaluate the clinic performance of high strength glass ceramic crowns for the painful cracked teeth during a 10-year observation period. Methods: Forty-two posterior teeth from 36 patients were diagnosed as having a crack, biting painful and sensitivity to cold were selected in the Department of Prosthodontic, Institute and Hospital of Stomatology, Nanjing University Medical School. The lost-wax hot pressed glass ceramic crowns were bonded on the minimally invasive prepared teeth by modern adhesive technology...
October 9, 2016: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
Roza Haghgoo, Motahare Ahmadvand, Sareh Moshaverinia
INTRODUCTION: NovaMin is a synthetic mineral compound composed of calcium, sodium, phosphorus, and silica. It releases crystalline hydroxyl-carbonate apatite (HCA), which structurally resembles the minerals naturally found in the teeth. Nano-hydroxyapatite (NHA) is a biocompatible compound with high affinity for tooth enamel. NHA particles morphologically resemble dental enamel apatite crystals. Considering the efficacy of remineralizing agents and the importance of conservative preventive measures, this study aimed to compare the remin-eralizing effects of NovaMin and NHA on caries-like lesions in primary teeth...
2016: Journal of Contemporary Dental Practice
Mini Saluja, Harpreet Singh Grover, Pankaj Choudhary
INTRODUCTION: Dentinal hypersensitivity is one of the most common problem, encountered in dental practice but has least predictable treatment outcome. The advent of lasers in dentistry has provided an additional therapeutic option for treating dentinal hypersensitivity. Although various lasers have been tried over a period of time to treat dentinal hypersensitivity, but still the doubt persist as to which laser leads to maximum dentinal tubular occlusion and is most suitable with minimal hazardous effects...
July 2016: Journal of Clinical and Diagnostic Research: JCDR
Manju Raj Kumari, Manjunath Mysore Krishnaswamy
INTRODUCTION: Success of any endodontic treatment depends on strict adherence to 'endodontic triad'. Preparation of root canal system is recognized as being one of the most important stages in root canal treatment. At times, we inevitably end up damaging root dentin which becomes a Gateway for infections like perforation, zipping, dentinal cracks and minute intricate fractures or even vertical root fractures, thereby resulting in failure of treatment. Several factors may be responsible for the formation of dentinal cracks like high concentration of sodium hypochlorite, compaction methods and various canal shaping methods...
July 2016: Journal of Clinical and Diagnostic Research: JCDR
Sugunakar Raju Godishala Swamy, Shyam Prasad Reddy Dorankula, Keerthi Muddana
INTRODUCTION: In forensic context precise knowledge on physical and histological changes of teeth subjected to high temperatures is of great importance. Preserving fragile incinerated teeth for physical, histological and ultra structural examinations is essential in fire investigations involving the origin of fire, its cause as well as the identification of victims which relies on a thorough understanding of the structural changes in dental tissues subjected to heat. AIM: The study was conducted to evaluate the physical and ultrastructural changes seen in freshly extracted teeth when subjected to gradual heating at different temperatures using Scanning Electron Microscope (SEM)...
July 2016: Journal of Clinical and Diagnostic Research: JCDR
Hsuan-Wen Wang, Yen-Hsiang Chang, Chun-Li Lin
This study evaluates the fracture resistance in an endodontically treated tooth using circular fiber-reinforced composite (FRC) and innovated anatomical short glass fiber reinforced (SGFR) posts under fatigue testing, monitored using the acoustic emission (AE) technique. An anatomical SGFR fiber post with an oval shape and slot/notch design was manufactured using an injection-molding machine. Crown/core maxillary second premolar restorations were executed using the anatomical SGFR and commercial cylindrical fiber posts under fatigue test to understand the mechanical resistances...
August 13, 2016: Journal of the Mechanical Behavior of Biomedical Materials
Paul J Constantino, Mark B Bush, Amir Barani, Brian R Lawn
A hallmark of mammalian evolution is a progressive complexity in postcanine tooth morphology. However, the driving force for this complexity remains unclear: whether to expand the versatility in diet source, or to bolster tooth structural integrity. In this study, we take a quantitative approach to this question by examining the roles of number, position and height of multiple cusps in determining sustainable bite forces. Our approach is to use an extended finite-element methodology with due provision for step-by-step growth of an embedded crack to determine how fracture progresses with increasing occlusal load...
August 2016: Journal of the Royal Society, Interface
Z Y Weng, Z Q Liu, R O Ritchie, D Jiao, D S Li, H L Wu, L H Deng, Z F Zhang
The giant panda׳s teeth possess remarkable load-bearing capacity and damage resistance for masticating bamboos. In this study, the hierarchical structure and mechanical behavior of the giant panda׳s tooth enamel were investigated under indentation. The effects of loading orientation and location on mechanical properties of the enamel were clarified and the evolution of damage in the enamel under increasing load evaluated. The nature of the damage, both at and beneath the indentation surfaces, and the underlying toughening mechanisms were explored...
December 2016: Journal of the Mechanical Behavior of Biomedical Materials
Michael S McCracken, David R Louis, Mark S Litaker, Helena M Minyé, Rahma Mungia, Valeria V Gordan, Don G Marshall, Gregg H Gilbert
BACKGROUND: The objectives of this study were to quantify practitioner variation in likelihood to recommend a crown and test whether certain dentist, practice, and clinical factors are associated significantly with this likelihood. METHODS: Dentists in The National Dental Practice-Based Research Network completed a questionnaire about indications for single-unit crowns. In 4 clinical scenarios, practitioners ranked their likelihood of recommending a single-unit crown...
August 1, 2016: Journal of the American Dental Association
Fauzia Ashraf, Pushpa Shankarappa, Abhinav Misra, Asheesh Sawhney, Nandamuri Sridevi, Anu Singh
Introduction. The aim of the present study was to evaluate the dentinal cracks after root canal preparation with rotary files: Gates Glidden, ProTaper Universal, ProTaper Next, and HyFlex CM at different instrumentation lengths. Methodology. Sixty-five mandibular premolars were mounted in the acrylic tube with simulated periodontal ligaments and the apex was exposed. The root canals were instrumented with different rotary files, namely, ProTaper Universal, ProTaper Next, and HyFlex CM, to the major apical foramen (AF), short AF, and beyond AF...
2016: Scientifica
Gianfranco Politano, Andrea Fabianelli, Federica Papacchini, Antonio Cerutti
Restorative procedures are accompanied by a reduction of tooth stability, a decrease of fracture resistance, and an increase in deflection of weakened cusps. The choice between a direct or an indirect restorative technique, mainly in posterior areas, is a challenge, and involves biomechanical, anatomical, functional, esthetic, and financial considerations. In this article, the pros and cons of direct restorations are examined, as well as an analysis of indirect restorations and an overview of dental ceramics...
2016: International Journal of Esthetic Dentistry
Djaudat Idiyatullin, Michael Garwood, Laurence Gaalaas, Donald R Nixdorf
OBJECTIVES: To evaluate the limit of tooth crack width visualization by two MRI pulse sequences in comparison with CBCT. METHODS: Two extracted human teeth with known crack locations and dimensions, as determined by reference standard microCT, were selected for experimental imaging. Crack location/dimension and the presence of common dental restorative materials such as amalgam were typical of that found clinically. Experimental imaging consisted of conventional CBCT scans and MRI scans with two pulse sequences including Sweep Imaging with Fourier Transformation (SWIFT) and gradient echo (GRE)...
September 2016: Dento Maxillo Facial Radiology
Raquel P Antoniazzi, Fabricio B Zanatta, Cassiano K Rösing, Carlos Alberto Feldens
BACKGROUND: Crack cocaine can alters functions related to the immune system and exert a negative influence of the progression and severity of periodontitis. The aim of this study was to compare periodontal status between crack cocaine users and crack nonusers and to investigate the association between crack cocaine and periodontitis after adjustments for confounding variables. MATERIALS AND METHODS: This cross-sectional study evaluated 106 individuals exposed to crack and 106 never exposed matched for age, sex and tobacco...
July 8, 2016: Journal of Periodontology
Niklas Rommel, Nils H Rohleder, Steffen Koerdt, Stefan Wagenpfeil, Roland Härtel-Petri, Klaus-Dietrich Wolff, Marco R Kesting
BACKGROUND: Methamphetamine, a highly addictive sympathomimetic stimulant, is currently widely abused worldwide and has been associated with devastating effects on oral health, resulting in the term "meth mouth". However, "meth mouth" pathology is primarily based on case reports with a lack of systematic clinical evaluation. Therefore, we have conducted a systematic study to investigate (1) the pharmacological impact of methamphetamine on oral health with regard to saliva function, including the parameters saliva flow rate and total saliva production (ml/5 min) and the buffering capacity of saliva; (2) the contribution of the symptoms of bruxism and muscle trismus to potential oral health damage...
2016: BMC Oral Health
Nasim Chiniforush, Hanieh Nokhbatolfoghahaei, Abbas Monzavi, Edris Pordel, Sajjad Ashnagar
INTRODUCTION: This study aimed to assess the Scanning Electron Microscope (SEM) analysis of tooth surface irradiated by erbium:yttrium-aluminum-garnet (Er:YAG) laser with various parameters. METHODS: Number of 25 extracted human third molars free of caries were used in this study. The teeth were put into 5 groups for laser irradiation as follows: group 1 (power: 0.5 W, Energy: 50 mJ); group 2 (power: 1 W, Energy: 100 mJ); group 3 (power: 1.5 W, Energy: 150 mJ); group 4 (power: 2 W, Energy: 200 mJ); group 5 (power: 2...
2016: Journal of Lasers in Medical Sciences
Amre R Atmeh, Timothy F Watson
Cutting of the dental hard tissues is an integral part of restorative dentistry. Cutting of the root dentine is also needed in preparation prior to endodontic treatment, with significant commercial investment for the development of flexible cutting instruments based around nickel titanium (NiTi) alloys. This paper describes the evolution of endodontic cutting instruments, both in materials used, e.g. the transition from stainless steel to NiTi, and the design of the actual instruments themselves and their method of activation-by hand or motor driven...
June 6, 2016: Interface Focus
Rashmi Bansal, Priyanka Chowdhary, Anuraag Gurtu, Nakul Mehrotra, Abhinav Kishore
Trauma may result in craze lines on the enamel surface, one or more fractured cusps of posterior teeth, cracked tooth syndrome, splitting of posterior teeth, and vertical fracture of root. Out of these, management of some fractures is of great challenge and such teeth are generally recommended for extraction. Literature search reveals attempts to manage such fractures by full cast crown, orthodontic wires, and so forth, in which consideration was given to extracoronal splinting only. However, due to advancement in materials and technologies, intracoronal splinting can be achieved as well...
2016: Case Reports in Dentistry
Geetika Chirumamilla, Cary E Goldstein, Nathaniel C Lawson
OBJECTIVES: To evaluate the clinical performance and survival of Enamic crowns placed in a prosthodontic dental practice. METHODS: Thirty-five patients and 45 crowns were included in the study. At 1-year recall appointments, the restorations were examined for survival. At the 2-year recall appointment, all restorations were clinically evaluated by an independent evaluator for CDA clinical criteria. Kaplan-Meier method and a log-rank test were used to compare the survival of the restorations placed with resin and resin-modified glass ionomer (RMGI) cements...
July 2016: Journal of Esthetic and Restorative Dentistry
Sadia Nasrin, Noriko Katsube, Robert R Seghi, Stanislav I Rokhlin
For adhesively retained ceramic crown of various types, it has been clinically observed that the most catastrophic failures initiate from the cement interface as a result of radial crack formation as opposed to Hertzian contact stresses originating on the occlusal surface. In this work, a 3D failure prognosis model is developed for interface initiated failures of monolithic ceramic crowns. The surface flaw distribution parameters determined by biaxial flexural tests on ceramic plates and point-to-point variations of multi-axial stress state at the intaglio surface are obtained by finite element stress analysis...
July 5, 2016: Journal of Biomechanics
Ganesh Ranganath Jadhav, Priya Ramesh Mittal
Longitudinal tooth fracture can be classified as craze lines, fractured cusp, cracked tooth, split tooth and vertical root fracture based on extent and severity of the fracture line. The most common type of longitudinal tooth fracture is fractured cusp that poses the treatment dilemma. Retention of the fractured cusp segment temporarily with matrix band followed by permanent bonded restoration and finally removal of tooth fragment during crown preparation is a novel technique. This paper throws light on a matricing and holding technique for the management of supra-crestally fractured palatal cusp of maxillary first premolar in a 29-year-old Asian male...
April 2016: Journal of Clinical and Diagnostic Research: JCDR
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