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https://www.readbyqxmd.com/read/29150016/low-level-laser-therapy-may-reduce-postoperative-pain-levels-after-root-canal-retreatment-in-patients-with-low-preoperative-pain-levels
#1
Romina Brignardello-Petersen
No abstract text is available yet for this article.
November 11, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/29149844/use-of-artificial-primary-teeth-for-endodontic-laboratory-research-experiments-related-to-canal-length-determination
#2
Anna Carolina V Mello-Moura, Carmela R Bresolin, Cacio Moura-Netto, André Ito, Angela T Araki, José Carlos P Imparato, Fausto M Mendes
BACKGROUND: Due to the scarcity of exfoliated/extracted human primary teeth with complete roots, artificial teeth were developed as an alternative to be used for educational and laboratory research purposes. This study aimed to assess the feasibility of using artificial primary teeth for conducting laboratory research through an experiment related to canal length determination, comparing artificial teeth with natural teeth. METHODS: Thirty anterior and 21 posterior artificial teeth, and the same number of natural primary teeth were selected...
November 17, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/29145877/trajectory-of-instantaneous-axis-of-rotation-in-fixed-lumbar-spine-with-instrumentation
#3
Masataka Inoue, Tetsutaro Mizuno, Toshihiko Sakakibara, Takaya Kato, Takamasa Yoshikawa, Tadashi Inaba, Yuichi Kasai
BACKGROUND: Several studies showed instantaneous axis of rotation (IAR) in the intact spine. However, there has been no report on the trajectory of the IAR of a damaged spine or that of a fixed spine with instrumentation. It is the aim of this study to investigate the trajectory of the IAR of the lumbar spine using the vertebra of deer. METHODS: Functional spinal units (L5-6) from five deer were evaluated with six-axis material testing machine. As specimen models, we prepared a normal model, a damaged model, and a pedicle screw (PS) model...
November 16, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29143136/investigation-of-arginine-a-specific-cysteine-proteinase-gene-expression-profiling-in-clinical-porphyromonas-gingivalis-isolates-against-photokilling-action-of-the-photo-activated-disinfection
#4
Maryam Pourhajibagher, Roghayeh Ghorbanzadeh, Abbas Bahador
Porphyromonas gingivalis is a significant root canal pathogen capable of causing endodontic infections, which during their treatment may receive sub-lethal doses of photo-activated disinfection (sPAD). As sPAD can influence microbial virulence, this study was designed to evaluate the effect of sPAD on gene expression level of arginine A-specific cysteine proteinase (rgpA), as one of the underlying virulence factors involved in the development of endodontic infection via P. gingivalis strains. To find out the sPAD against 16 clinical isolates of PAD-resistant P...
November 15, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29142882/incidence-of-apical-crack-formation-and-propagation-during-removal-of-root-canal-filling-materials-with-different-engine-driven-nickel-titanium-instruments
#5
Taha Özyürek, Vildan Tek, Koray Yılmaz, Gülşah Uslu
Objectives: To determine the incidence of crack formation and propagation in apical root dentin after retreatment procedures performed using ProTaper Universal Retreatment (PTR), Mtwo-R, ProTaper Next (PTN), and Twisted File Adaptive (TFA) systems. Materials and Methods: The study consisted of 120 extracted mandibular premolars. One millimeter from the apex of each tooth was ground perpendicular to the long axis of the tooth, and the apical surface was polished...
November 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/29142881/smear-layer-removal-by-different-chemical-solutions-used-with-or-without-ultrasonic-activation-after-post-preparation
#6
Daniel Poletto, Ana Claudia Poletto, Andressa Cavalaro, Ricardo Machado, Leopoldo Cosme-Silva, Cássia Cilene Dezan Garbelini, Márcio Grama Hoeppner
Objectives: This study evaluated smear layer removal by different chemical solutions used with or without ultrasonic activation after post preparation. Materials and Methods: Forty-five extracted uniradicular human mandibular premolars with single canals were treated endodontically. The cervical and middle thirds of the fillings were then removed, and the specimens were divided into 9 groups: G1, saline solution (NaCl); G2, 2.5% sodium hypochlorite (NaOCl); G3, 2% chlorhexidine (CHX); G4, 11...
November 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/29142877/removal-efficacy-and-cytotoxicity-of-a-calcium-hydroxide-paste-using-n-2-methyl-pyrrolidone-as-a-vehicle
#7
Myung-Jin Lim, Hyun-Jin Jang, Mi-Kyung Yu, Kwang-Won Lee, Kyung-San Min
Objectives: This study investigated the removal efficacy and cytotoxicity of a newly developed calcium hydroxide paste (cleaniCal, Maruchi) using N-2-methyl-pyrrolidone (NMP) as a vehicle in comparison with ApexCal (Ivoclar Vivadent) and Calcipex II (Nishika), which use different vehicles such as polyethylene glycol and propylene glycol, respectively. Materials and Methods: Thirty maxillary premolars with oval-shaped canals were divided into 3 groups and the teeth were filled with one of the pastes...
November 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/29142875/quantification-of-the-tug-back-by-measuring-the-pulling-force-and-micro-computed-tomographic-evaluation
#8
Su-Jin Jeon, Young-Mi Moon, Min-Seock Seo
Objectives: The aims of this study were to quantify tug-back by measuring the pulling force and investigate the correlation of clinical tug-back pulling force with in vitro gutta-percha (GP) cone adaptation score using micro-computed tomography (µCT). Materials and Methods: Twenty-eight roots from human single-rooted teeth were divided into 2 groups. In the ProTaper Next (PTN) group, root canals were prepared with PTN, and in the ProFile (PF) group, root canals were prepared using PF (n = 14)...
November 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/29135290/-study-of-the-canalis-mandibulae-morphology-in-different-vertical-facial-types
#9
Krisztina Mártha I, Cristina Bica, Blanka Kész, Bernadette Kerekes Máthé
INTRODUCTION: The precise knowledge of the position of canalis mandibulae and foramen mandibulae is important for surgical and endodontic interventions on the mandible. AIM: The aim of the study is to examine the position of these anatomical landmarks in different vertical facial types. METHOD: In the panorama radiograph of 26 normodivergent, 26 hypodivergent and 28 hyperdivergent arthritis (total of 1360 measurements) we measured the distance between the canalis mandibulae and interdental septums, the apex of the lateral teeth, the mandibular base, the goniac angle, and the steepness of the canal and the distance the foramen mandibulae to the anterior and posterior margin of the ramus...
November 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/29126633/mechanical-behavior-of-endodontically-restored-canine-teeth-effects-of-ferrule-post-material-and-shape
#10
Pietro Ausiello, Stefano Ciaramella, Massimo Martorelli, Antonio Lanzotti, Fernando Zarone, David C Watts, Antonio Gloria
OBJECTIVE: To assess the effect of a ferrule design with specific post material-shape combinations on the mechanical behavior of post-restored canine teeth. METHODS: Micro-CT scan images of an intact canine were used to create a 3-D tessellated CAD model, from which the shapes of dentin, pulp and enamel were obtained and geometric models of post-endodontically restored teeth were created. Two types of 15mm post were evaluated: a quartz fiber post with conical-tapered shape, and a carbon (C) fiber post with conical-cylindrical shape...
November 7, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29126370/evaluation-of-final-irrigation-regimens-with-maleic-acid-for-smear-layer-removal-and-wettability-of-root-canal-sealer
#11
Nidambur Vasudev Ballal, Carmen Maria Ferrer-Luque, Mrunali Sona, K Narayan Prabhu, Teresa Arias-Moliz, Pilar Baca
OBJECTIVE: To evaluate the smear layer removal and wettability of AH Plus sealer on root canal dentin treated with MA (maleic acid), MA + CTR (cetrimide) and MA + CTR + CHX (chlorhexidine) as final irrigating regimens. MATERIAL AND METHODS: For smear layer removal, 40 teeth were instrumented to size F4 and divided into four groups: (1) 7% MA, (2) 7% MA + 0.2% CTR, (3) 7% MA + 0.2% CTR + 2% CHX, (4) distilled water (control). After irrigation, teeth were subjected to SEM analysis...
November 10, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/29126360/endodontic-treatment-of-canine-teeth-in-a-cynomolgus-monkey-macaca-fascicularis
#12
Caterina Facchini, Ilaria Iacopetti, Eugenio Gaudio, Alessandro Zotti, Massimo Boldrin, Fabio Fante, Franco Mutinelli, Emanuele Cozzi, Giulia Maria De Benedictis
A case of bilateral superior canine tooth pulp necrosis in an 18-year-old male Macaca fascicularis is described . A skull computed tomography scan was performed to confirm the diagnostic suspicion. A successful bilateral endodontic treatment with coronotomy was performed using rotary nickel-titanium instruments. Post-operative dental radiographs confirmed the correct positioning of the sealant. A rapid and excellent clinical recovery was obtained after each surgery. This innovative approach may contribute to improving the quality of root canal treatments provided to non-human primates...
January 1, 2017: Laboratory Animals
https://www.readbyqxmd.com/read/29123632/management-of-post-endodontic-retreatment-pain-with-low-level-laser-therapy
#13
Mohammad Asnaashari, Hengameh Ashraf, Amir Houshang Daghayeghi, Seyed Masoud Mojahedi, Saranaz Azari-Marhabi
Introduction: Pharmacotherapy with analgesics and non-steroidal anti-inflammatory drugs has been traditionally used to relief post-operative pain of endodontic treatments. However, due to the side effects reported for these drugs, some efforts have been made to decrease the post-operative pain of the endodontic treatments through laser irradiation. The present study aimed to evaluate the effects of low level laser therapy (LLLT) on the reduction of pain after root canal retreatment. Methods: In this clinical trial, 61 patients requiring endodontic retreatments in posterior teeth were selected...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/29122762/long-term-effectiveness-of-direct-ct-guided-aspiration-and-fenestration-of-symptomatic-lumbar-facet-synovial-cysts
#14
V N Shah, N D von Fischer, C T Chin, E L Yuh, M R Amans, W P Dillon, C P Hess
BACKGROUND AND PURPOSE: Lumbar facet synovial cysts are commonly seen in facet degenerative arthropathy and may be symptomatic when narrowing the spinal canal or compressing nerve roots. The purpose of this study was to analyze the safety, effectiveness, and long-term outcomes of direct CT-guided lumbar facet synovial cyst aspiration and fenestration for symptom relief and for obviating an operation. MATERIALS AND METHODS: We retrospectively reviewed the medical records and imaging studies of 64 consecutive patients between 2006 and 2016 who underwent 85 CT-guided lumbar facet synovial cyst fenestration procedures in our department...
November 9, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29116496/influence-of-a-calcium-hydroxide-based-intracanal-dressing-on-the-quality-of-the-root-canal-filling-assessed-by-capillary-flow-porometry
#15
Amir-Teymour Moinzadeh, Roeland J G De Moor, Mieke A A De Bruyne
OBJECTIVE: The objective of this study is to evaluate the influence of a calcium hydroxide intracanal dressing (CH) on the short- and long-term sealing ability of the root canal filling using capillary flow porometry (CFP). MATERIALS AND METHODS: To verify the repeatability of the method, five obturated specimens were submitted to CFP. Measurements were repeated three times and compared with the non-parametric Friedman test. Forty-five instrumented palatal roots were randomly divided into three groups...
November 7, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29116395/correlations-between-sedimentation-sign-dural-sac-cross-sectional-area-and-clinical-symptoms-of-degenerative-lumbar-spinal-stenosis
#16
Sangbong Ko
PURPOSE: In this study, we addressed the correlation between the cross-sectional area (CSA) of the dural sac and the nerve root sedimentation sign (SedSign) and the correlation between the distance of claudication and the CSA of the dural sac or SedSign in patients with lumbar spinal stenosis. We also evaluated the reliability of clinical symptom prediction. METHODS: We checked claudication distance using a questionnaire, and we gauged low back pain when standing, referred pain, and radiating pain using visual analog scale scores...
November 7, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29114431/maxillary-first-premolars-with-three-root-canals-two-case-reports
#17
Zeliha Ugur, Kerem Engin Akpinar, Demet Altunbas
It is very important that the dentists have sufficient information about possible variations in the expected root canal configurations in order to achieve success in endodontic treatment. In addition to having adequate knowledge on the variations of the root canal anatomy, periapical radiographs from different angles, careful examination of the pulp chamber floor, and use of dental operation microscope during the procedure are also important factors that contribute to the diagnosis of the additional roots and canals...
2017: J Istanb Univ Fac Dent
https://www.readbyqxmd.com/read/29112281/effects-of-increased-apical-enlargement-on-the-amount-of-unprepared-areas-and-coronal-dentine-removal-a-micro-computed-tomography-study
#18
A R Pérez, F R F Alves, M F Marceliano-Alves, J C Provenzano, L S Gonçalves, A A Neves, J F Siqueira
AIM: To evaluate the effects of progressive apical enlargement on the amount of unprepared root canal surface area and remaining dentine thickness. METHODOLOGY: The root canals of 30 extracted mandibular incisors with Vertucci's type I configuration were instrumented with rotary HyFlex instruments (Coltene-Whaledent, Altstätten, Switzerland) up to 4 instruments larger than the first one that bound at the working length (WL). Teeth were scanned in a micro-computed tomography (micro-CT) device before canal preparation and after instrumentation with the 2(nd) , 3(rd) and 4(th) larger instruments...
November 7, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/29109888/melanotic-schwannomas-are-rarely-seen-pigmented-tumors-with-unpredictable-prognosis-and-challenging-diagnosis
#19
Elif Keskin, Sumeyye Ekmekci, Ozgur Oztekin, Gulden Diniz
Melanotic Schwannoma (MS) is rarely seen and potentially malignant neoplasm that is categorized as a variant of Schwannoma. MS most frequently involves intracranial structures followed by posterior nerve roots in the spinal canal. Approximately 50% of the cases with MS have psammomatous calcifications and this type of MS is related to Carney complex with autosomal dominant inheritance. Most cases of MS are benign, though 10% of them are malignant with metastatic potential. MS mimics melanoma and the differential diagnosis should be made excluding other melanin producing neoplasms especially melanoma...
2017: Case Reports in Pathology
https://www.readbyqxmd.com/read/29109814/evaluation-of-dentin-defect-formation-during-retreatment-with-hand-and-rotary-instruments-a-micro-ct-study
#20
Ayca Yilmaz, Dilek Helvacioglu-Yigit, Cansu Gur, Handan Ersev, Gullu Kiziltas Sendur, Egemen Avcu, Canan Baydemir, Paul Vincent Abbott
The purpose of this study was to compare the incidence and longitudinal propagation of dentin defects after gutta-percha removal with hand and rotary instruments using microcomputed tomography. Twenty mandibular incisors were prepared using the balanced-force technique and scanned in a 19.9 μm resolution. Following filling with the lateral compaction technique, gutta-percha was removed with ProTaper Universal Retreatment (PTUR) or hand instruments. After rescanning, a total of 24,120 cross-sectional images were analyzed...
2017: Scanning
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