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https://www.readbyqxmd.com/read/28333370/influence-of-nickel-titanium-rotary-systems-with-varying-tapers-on-the-biomechanical-behaviour-of-maxillary-first-premolars-under-occlusal-forces-a-finite-element-analysis-study
#1
S Askerbeyli Ors, A Serper
AIM: To evaluate the effect of three nickel-titanium (Ni-Ti) rotary systems with varying tapers on stress distribution and to analyse potential fracture patterns as well as the volume of fracture-susceptible regions in two-rooted maxillary premolars. METHODOLOGY: The root canals of three single-rooted premolars were prepared with either HeroShaper (Micro-Mega, Besançon, France) to (size 30, .04 taper), Revo-S (Micro-Mega) to AS30 (size 30, .06 taper) or ProTaper Universal (Dentsply Maillefer, Ballaigeus, Switzerland) to F3 (size 30, ...
March 23, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28332866/comparing-cone-beam-computed-tomography-with-periapical-radiography-for-assessing-root-canal-obturation-in-vivo-using-microsurgical-findings-as-validation
#2
Dongzhe Song, Lan Zhang, Wei Zhou, Qinghua Zheng, Xingyu Duan, Xuedong Zhou, Dingming Huang
OBJECTIVES: The aim of this study was to verify whether there is a difference in the in vivo performance characteristics of CBCT and periapical radiography (PR) in assessing the apical extension of root canal obturation (RCO) and to evaluate the ability of CBCT in void detection using microsurgical findings as validation. METHODS: This study included 323 tooth roots that required surgical treatment and for which pre-existing periapical radiographs and CBCT images were available...
March 23, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28326931/overexpression-of-suppressor-of-cytokine-signaling-3-in-dorsal-root-ganglion-attenuates-cancer-induced-pain-in-rats
#3
Jinrong Wei, Meng Li, Dieyu Wang, Hongyan Zhu, Xiangpeng Kong, Shusheng Wang, You-Lang Zhou, Zhong Ju, Guang-Yin Xu, Guo-Qin Jiang
Background Cancer-induced pain (CIP) is one of the most severe types of chronic pain with which clinical treatment remains challenging and the involved mechanisms are largely unknown. Suppressor of cytokine signaling 3 (SOCS3) is an important intracellular protein and provides a classical negative feedback loop, thus involving in a wide variety of processes including inflammation and nociception. However, the role of SOCS3 pathway in CIP is poorly understood. The present study was designed to investigate the role of SOCS3 in dorsal root ganglion (DRG) in the development of CIP...
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28326732/-three-dimensional-finite-element-analyses-of-the-deep-wedge-shaped-defective-premolars-restored-with-different-methods
#4
Zhao Ling, Yang Liyuan, Liu Cuiling, Gao Xu
OBJECTIVE: The objective of this paper is to analyze the stress distribution in the deep wedge-shaped defective mandibular first premolars restored with different methods. METHODS: Three-dimensional finite element models of mandibular first premolar with deep wedge-shaped defect were created. The model, which was untreated after root canal treatment, served as the control group. Then, according to different treatment designs, four experimental groups were established as follows: resin filling (A), post restoration after resin filling (B), crown restoration after resin filling (C), and post and crown restoration after resin filling (D)...
February 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28326718/-maxillary-first-molar-with-two-distobuccal-root-canals-a-case-report
#5
Cui Pingping, Wang Xiaoya, Yu Jian, Sun Qinfeng
The root and canal anatomy of maxillary first molar is very complicated. The incidence of having two canals in the mesiobuccal root of maxillary first molar is higher than that in its distobuccal root. This article described a maxillary first molar with five root canals, including two canals in mesiobuccal and distobuccal roots.
October 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28326697/-cause-and-regulation-of-pain-during-root-canal-therapy
#6
Wu Buling, Liu Zhao
In stomatology, root canal therapy is a commonly used and effective treatment for dental pulp diseases and periapical diseases. However, pain may occur during or after treatment and may severely affect patients. This article aimed to analyze the mechanism and cause of pain during root canal therapy, which may reduce or relieve pain.
October 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28323700/electrophysiological-study-for-nerve-root-entrapment-in-patients-with-isthmic-spondylolisthesis
#7
Masahiro Morita, Akira Miyauchi, Shinya Okuda, Takenori Oda, Motoki Iwasaki
STUDY DESIGN: A case series study. OBJECTIVE: To investigate the electrophysiological location of nerve root entrapment in patients with isthmic spondylolisthesis. SUMMARY OF BACKGROUND DATA: Although the lesion of the nerve root in patients with isthmic spondylolisthesis has been thought to be located at the pars interarticularis due to proliferation of fibrous cartilage, there is no electrophysiological study in relation to this accomplished fact...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28323451/phytostabilization-of-heavy-metals-by-the-emergent-macrophyte-vossia-cuspidata-roxb-griff-a-phytoremediation-approach
#8
Tarek M Galal, Fatma A Gharib, Safia M Ghazi, Khalid H Mansour
The present study was conducted to investigate the potential of Vossia cuspidata as a phytoremediator to accumulate heavy metals from polluted water bodies. Thirty-two quadrats, distributed equally in eight sites (six polluted sites along Ismailia canal and two unpolluted sites along the Nile River) were selected seasonally for plant, water and sediment investigations. Winter plants recorded the highest values of shoot height, diameter, and leaf width, but the lowest shoot density. Plants collected in autumn had the lowest values of leaf length, width and area, while those in spring had the highest shoot density, with the lowest shoot height...
March 21, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28321890/a-training-model-for-revitalisation-procedures
#9
M Widbiller, S Ducke, A Eidt, W Buchalla, K M Galler
AIM: To develop an inexpensive simulation model for training of revitalisation procedures. METHODOLOGY: A replica of an immature maxillary central incisor was equipped with a mock blood reservoir at the root apex and embedded in a plaster model. Mock blood consisted of water supplemented with red pigments and fibrinogen, while thrombin was inserted into the root canal to allow for clot formation. RESULTS: A true-to-life training model for revitalisation procedures was established, where the induction of bleeding and formation of a blood clot can be mimicked...
March 21, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28320541/comparative-evaluation-of-premedication-with-ketorolac-and-prednisolone-on-postendodontic-pain-a-double-blind-randomized-controlled-trial
#10
R Praveen, Sophia Thakur, M Kirthiga
INTRODUCTION: The present clinical trial aimed to evaluate and compare the effect of a single pretreatment dose of ketorolac (20 mg), prednisolone (30 mg), and placebo on postendodontic pain in patients undergoing endodontic therapy for irreversible pulpitis or pulpal necrosis using a visual analog scale. METHODS: Ninety-two subjects were included in the present trial; 46 subjects had a pulpal diagnosis of irreversible pulpitis, and the other 46 had pulpal necrosis...
March 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28320029/morphometric-changes-of-the-lumbar-intervertebral-foramen-after-percutaneous-endoscopic-foraminoplasty-under-local-anesthesia
#11
Tatsuhiko Henmi, Tomoya Terai, Akihiro Nagamachi, Koichi Sairyo
Background Percutaneous endoscopic diskectomy (PED) for the lumbar spine is a relatively new technique that is becoming more common due to its relatively less invasive nature. However, one possible serious complication is an exiting nerve injury when the cannula of the endoscope is inserted into the neural canal through the intervertebral foramen. A technique to enlarge the intervertebral foramen, called foraminoplasty, was recently established to insert the cannula safely into an appropriate position in the neural canal...
March 20, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28318172/-accidental-injection-of-sodium-hypochlorite-in-inferior-alveolar-nerve-block-anesthesia
#12
Li Hongyan, Xu Jian, Zhang Baorong, Jia Yue, Liu Minhua, Luo Yilang, Zhao Jing
Sodium hypochlorite (NaClO) has been widely used in clinical practice as one of the most efficient root canal irrigants. Its properties include broad-spectrum antimicrobial activity and ability to dissolve necrotic tissues. However, when used improperly, NaClO can cause a series of adverse reactions, such as mucosal inflammation, irritation, or injury. This paper presents a case of accidental injection of NaClO in inferior alveolar nerve block anesthesia.
December 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28318161/-clinical-comparative-study-on-the-efficacy-of-periodontal-endodontic-therapy-and-periodontal-treatment-alone-for-advanced-periodontitis
#13
Tan Baochun, Xiao Jianping, Yan Fuhua, Huan Hong
OBJECTIVE: This study aimed to explore the period of endodontic treatment and the effects of periodontal-endodontic treatment for advanced periodontitis. METHODS: A total of 180 patients with advanced periodontitis participated in this clinical multicenter study. The respondents were randomly divided into an endodontic combined treatment (experimental) group and a periodontal treatment alone (control) group; each group consisted of 90 teeth. The control group received periodontal therapy only...
December 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28317827/-direct-restoration-of-the-tooth-crown-using-various-core-build-up-materials
#14
L N Maksimovskaya, V A Krutov, P V Kuprin, M A Kuprina
The aim of the study was to assess direct restorations mechanical properties (both in vitro and in vivo) to improve dental restorations quality after root canal treatment. Laboratory tests showed that using nanocomposite materials of dual curing with the fiberglass reinforced posts improves restoration strength in endodontically treated teeth: by 3.9±5.8% in class II Peroz restorations, 12.6±5.9 and 24.2±4.2% in class III and IV, correspondently. Using fiberglass reinforced posts (LuxaPost) for the restoration of the tooth crown after endodontic treatment significantly decreases the number of complications associated with marginal leakage of the restoration during first 2 years after treatment (p<005)...
2017: Stomatologii︠a︡
https://www.readbyqxmd.com/read/28317353/-clinical-application-on-restoration-of-dentition-defects-using-tooth-alveolar-bone-grafts
#15
Chen Zhifang, Zhang Wei
OBJECTIVE: To evaluate the clinical effectiveness of tooth-alveolar bone grafts in repairing dentition defects. METHODS: Forty-five patients with dentition defect were divided into two groups according to different operation methods. In group A (n=24), the tooth-alveolar bone grafts of the transplanted tooth and its surrounding alveolar bone were cut using modified surgical orthodontics and then embedded into the designated planting hole. In group B (n=21), the teeth were extracted through conventional tooth transplantation and then embedded into the prepared planting holes...
August 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28316949/evaluation-of-the-role-of-probiotics-in-endodontic-treatment-a-preliminary-study
#16
Aarti Bohora, Sharad Kokate
AIMS AND OBJECTIVES: The principal goal of endodontics is the prevention of periapical infection. Acute and chronic apical periodontitis occur due to the persistence of pathogenic microorganisms such as Enterococcus faecalis and Candida albicans harboring the root canal systems of the teeth. The concept of the use of probiotics in addressing endodontic disease is new and has not been studied adequately. On the basis of the success of probiotics in periodontal treatment, this preliminary work was performed (a) to evaluate the antibacterial efficacy of probiotics against common endodontic pathogens, i...
January 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28316920/measurement-of-ph-and-calcium-ions-release-from-different-calcium-hydroxide-pastes-at-different-intervals-of-time-atomic-spectrophotometric-analysis
#17
Pranab Misra, Rhythm Bains, Kapil Loomba, Abhinav Singh, V P Sharma, R C Murthy, Rakesh Kumar
AIM: To evaluate the effect of different vehicles on pH and release of calcium ions from calcium hydroxide (CH) paste from apical third of root canals. METHODS: 40 single rooted extracted human mandibular premolars were instrumented with RevoS files (MicroMega) up to ISO size 40. The teeth were divided into 4 groups on the basis of vehicle as follows: Group I - calcium hydroxide mixed with 2% chlorhexidine; Group II - calcium hydroxide mixed with propylene glycol; Group III - calcium hydroxide mixed with glycerine; and Control - calcium hydroxide mixed with double distilled water...
January 2017: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/28316625/microbiological-study-of-cast-posts-before-cementation
#18
Maricela Vallejo-Labrada, Juan Carlos Ojeda-Garces
This study identifies the most common microorganisms present in type III gold cast posts related to pulpal disease and evaluates the sterilization/disinfection method before cementation in the root canal. Forty-five type III gold cast posts were aseptically collected in sterile sealed plastic bags and taken to the microbiology laboratory to carry out the study: fifteen cast posts had no treatment, fifteen were disinfected (immersion in 70% alcohol during 15 minutes), and fifteen were autoclaved at 121°C for 15 minutes by using saturated steam under 15 psi pressure...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28306163/an-update-of-dens-invaginatus-in-the-diagnosis-and-treatment
#19
REVIEW
Jingjing Zhu, Xinhuan Wang, Yanjun Fang, Johannes W Von den Hoff, Liuyan Meng
Dens invaginatus is a malformation with varying anatomical features, posing challenges to treatment. Early and accurate diagnosis plays a significant role in selecting the appropriate treatment. The diagnosis of teeth with a complex root canal system including dens invaginatus has made progress with the application of three-dimensional imaging techniques in endodontics. Advanced treatment options provide hope for teeth that could not be saved before. This review discusses diagnostic methods and treatment options for teeth with dens invaginatus, and provides guidelines for the management of dens invaginatus cases in clinic...
March 17, 2017: Australian Dental Journal
https://www.readbyqxmd.com/read/28302945/the-incidence-of-dentinal-cracks-during-root-canal-preparations-with-reciprocating-single-file-and-rotary-file-systems-a-meta-analysis
#20
Xi Wei, Bo Hu, Haiyang Peng, Ming Tang, Jinlin Song
As a dangerous factor in vertical root fracture, dentinal crack formation is often associated with root canal instruments. We conducted this meta-analysis to compare the influence of two types of nickel titanium (NiTi) instruments that have different movements (reciprocating single-file versus full-sequence rotary file systems) on dentinal cracks formation during root canal preparation. Searches were conducted in PubMed, ISI Web of Knowledge, Embase and Cochrane Library using a combination of keywords. Titles and abstracts of all articles were independently assessed by two reviewers in accordance with the predefined inclusion criteria...
March 8, 2017: Dental Materials Journal
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