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https://www.readbyqxmd.com/read/28097666/understanding-external-cervical-resorption-patterns-in-endodontically-treated-teeth
#1
M Mavridou, E Hauben, M Wevers, E Schepers, L Bergmans, P Lambrechts
AIM: To understand the pattern of external cervical resorption (ECR) in endodontically treated teeth. To compare characteristics and mechanisms of ECR in root filled teeth with those established in teeth with vital pulps. METHODOLOGY: Seven cases of endodontically treated permanent teeth displaying ECR were investigated. ECR diagnosis was based on clinical findings and radiographic examination with cone-beam computed tomography (CBCT). The extracted teeth were further analysed by a nano-focus computed tomographic (nano-CT) system, hard tissue histology and scanning electron microscopy (SEM)...
January 18, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28093082/less-extrusion-debris-during-the-retreatment-of-curved-canals-using-twisted-files-with-higher-rotational-speeds-an-ex-vivo-study
#2
Mengdong Liu, Shijiang Xiong, Fei Tan, Yi Liu
BACKGROUND: Debris extrusion from the apical foramen can be problematic in severely curved canals. This study aimed to assess the use of Twisted Files (TF) at different rotational speeds during retreatment, compared with manual technique using Triple-Flex Files (TFF). METHODS: Forty-eight mesiobuccal root canals were randomized to four groups (n = 12 per group). In groups A, B, and C, gutta-percha was removed using TF at 500, 1000, and 1500 rpm, respectively, while it was removed using TFF in group D...
January 16, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28092475/temperature-development-on-the-external-root-surface-during-laser-assisted-endodontic-treatment-applying-a-microchopped-mode-of-a-980%C3%A2-nm-diode-laser
#3
Franziska Beer, Eleftherios Terry R Farmakis, Josip Kopic, Christoph Kurzmann, Andreas Moritz
OBJECTIVE: The aim of this article was to investigate the temperature increase of the external root surface during laser-assisted endodontic treatment using a diode laser (980 nm) in a microchopped mode. METHODS: Ten freshly extracted, human maxillary incisors with mature apices were collected, prepared to size F4 at working length (ProTaper; Dentsply Maillefer, Ballaigues, Switzerland), mounted to a holder, and irradiated (using spiral movements in coronal direction) with a diode laser (GENTLEray 980 Classic Plus; KaVo, Biberach, Germany) with a 200 μm fiber in four different treatment groups: Group 1 (control group) was irradiated in six cycles of 5-sec irradiation/20-sec pause with 2...
January 12, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28090184/radiographic-evaluation-of-the-status-of-third-molars-in-sriganganagar-population-a-digital-panoramic-study
#4
Sharry Goyal, Pradhuman Verma, Seetharamaiha Sunder Raj
BACKGROUND: Third molar (M3) agenesis and impaction are associated with evolution, changed dietary habits, and human jaw growth. The aim of the study was to radiographically evaluate the prevalence of M3s agenesis, impacted M3s with different impaction patterns, and the approximation of Inferior Dental Canal (IDC) with impacted mandibular M3s roots among the Sriganganagar population. METHODS: The study included 700 randomly selected subjects from OPD with an age range of 25-45 years...
November 2016: Malaysian Journal of Medical Sciences: MJMS
https://www.readbyqxmd.com/read/28088226/use-of-an-intraoperative-navigation-system-for-retrieving-a-broken-dental-instrument-in-the-mandible-a-case-report
#5
Shintaro Sukegawa, Takahiro Kanno, Akane Shibata, Kenichi Matsumoto, Yuka Sukegawa-Takahashi, Kyosuke Sakaida, Yoshihiko Furuki
BACKGROUND: A fracture of root canal instruments, with a fractured piece protruding beyond the apex, is a troublesome incident during an endodontic treatment. Locating and retrieving them represents a challenge to maxillofacial surgeons because it is difficult to access due to the proximity between the foreign body and vital structures. Although safe and accurate for surgery, radiographs and electromagnetic devices do not provide a precise three-dimensional position. In contrast, computer-aided navigation provides a correlation between preoperatively collected data and intraoperatively encountered anatomy...
January 15, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28079678/sound-localization-in-patients-with-congential-unilateral-conductive-hearing-loss-with-a-transcutaneous-bone-conduction-implant
#6
Erich Vyskocil, Rudolfs Liepins, Alexandra Kaider, Michaela Blineder, Sasan Hamzavi
OBJECTIVE: There is no consensus regarding the benefit of implantable hearing aids in congenital unilateral conductive hearing loss (UCHL). This study aimed to measure sound source localization performance in patients with congenital UCHL and contralateral normal hearing who received a new bone conduction implant. STUDY DESIGN: Evaluation of within-subject performance differences for sound source localization in a horizontal plane. SETTING: Tertiary referral center...
January 10, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28079677/cadaveric-testing-of-robot-assisted-access-to-the-internal-auditory-canal-for-vestibular-schwannoma-removal
#7
Neal P Dillon, Ramya Balachandran, Michael A Siebold, Robert J Webster, George B Wanna, Robert F Labadie
HYPOTHESIS: An image-guided robotic system can safely perform the bulk removal of bone during the translabyrinthine approach to vestibular schwannoma (VS). BACKGROUND: The translabyrinthine approach to VS removal involves extensive manual milling in the temporal bone to gain access to the internal auditory canal (IAC) for tumor resection. This bone removal is time consuming and challenging due to the presence of vital anatomy (e.g., facial nerve) embedded within the temporal bone...
January 10, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28079309/bioactive-injectable-aggregates-with-nanofibrous-microspheres-and-human-dental-pulp-stem-cells-a-translational-strategy-in-dental-endodontics
#8
I Garzón, M A Martin-Piedra, V Carriel, M Alaminos, X Liu, R D Souza
Regeneration of the pulp-dentin complex with stem cells is a potential alternative to conventional root canal treatments. Human dental pulp stem cells (hDPSCs) have been extensively studied because of their ability to proliferate and differentiate into mineralized dental and nondental tissues. In this work we combined hDPSCs with two types of injectable poly-L-lactic acid (PLLA) microspheres with a nanofibrous or smooth surface to form bioactive injectable aggregates, and examined their ability to promote pulp regeneration in the root canal in an in vivo model...
January 12, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28076466/ozone-therapy-as-an-adjuvant-for-endondontic-protocols-microbiological-ex-vivo-study-and-citotoxicity-analyses
#9
Carlos Goes Nogales, Marina Beloti Ferreira, Antonio Fernando Montemor, Maria Filomena de Andrade Rodrigues, José Luiz Lage-Marques, João Humberto Antoniazzi
Objectives: This study evaluated the antimicrobial efficacy of ozone therapy in teeth contaminated with Pseudomonas aeruginosa, Enterococcus faecalis, and Staphylococcus aureus using a mono-species biofilm model. Parallel to this, the study aimed to evaluate the cytotoxicity of ozone for human gingival fibroblasts. Material and Methods: One hundred and eighty single-root teeth were contaminated with a mono-species biofilm of Enterococcus faecalis, Pseudomonas aeruginosa, and Staphylococcus aureus...
November 2016: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28076461/an-in-vitro-evaluation-of-various-irrigation-techniques-for-the-removal-of-double-antibiotic-paste-from-root-canal-surfaces
#10
Hakan Gokturk, Ismail Ozkocak, Fevzi Buyukgebiz, Osman Demir
Objective: The aim of this study was to investigate the effectiveness of conventional syringe irrigations, passive ultrasonic irrigation (PUI), Vibringe, CanalBrush, XP-endo Finisher, and laser-activated irrigation (LAI) systems in removing double antibiotic paste (DAP) from root canals. Material and Methods: One hundred five extracted single-rooted teeth were instrumented. The roots were split longitudinally. Three standard grooves were created and covered with DAP...
November 2016: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28076457/removal-of-calcium-hydroxide-from-weine-type-ii-systems-using-photon-induced-photoacoustic-streaming-passive-ultrasonic-and-needle-irrigation-a-microcomputed-tomography-study
#11
Adam Lloyd, Geraldine Navarrete, Melissa Andreia Marchesan, David Clement
Objective: This study compared the effectiveness of Er:YAG laser-activated irrigation (PIPS), passive ultrasonic irrigation (PUI) with EndoUltra and standard needle irrigation (SNI) in the removal of calcium hydroxide [Ca(OH)2] from the mesial roots of Weine Type II mandibular molars. Material and Methods: Thirty mandibular molars were screened by µCT for the presence of mesial roots with complex intra-canal anatomy and a common apical foramen. The teeth were enlarged to a standardized 25/...
November 2016: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28074430/the-monomeric-gtpase-raba2-is-required-for-progression-and-maintenance-of-membrane-integrity-of-infection-threads-during-root-nodule-symbiosis
#12
Virginia Dalla Via, Soledad Traubenik, Claudio Rivero, O Mario Aguilar, María Eugenia Zanetti, Flavio Antonio Blanco
Progression of the infection canal that conducts rhizobia to the nodule primordium requires a functional Rab GTPase located in Golgi/trans-Golgi that also participate in root hair polar growth. Common bean (Phaseolus vulgaris) symbiotically associates with its partner Rhizobium etli, resulting in the formation of root nitrogen-fixing nodules. Compatible bacteria can reach cortical cells in a tightly regulated infection process, in which the specific recognition of signal molecules is a key step to select the symbiotic partner...
January 10, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28072988/-retrospective-analysis-of-pulp-revascularization-in-immature-permanent-teeth-with-diffuse-pulpitis
#13
C F Peng, Y M Zhao, Y Yang, H Liu, M Qin
Objective: To evaluate the treatment effectiveness of revascularization in immature permanent teeth with diffuse pulpitis and to provide an alternative approach for the treatment of these teeth. Methods: Clinical and radiographic data were collected from 17 immature permanent teeth which were diagnosed as diffuse pulpitis and with their pulp extirpated at Emergency Department of Peking University School and Hospital of Stomatology. All these teeth were treated using pulp revascularization at Department of Pediatric Dentistry...
January 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28068971/a-comparison-of-the-shaping-ability-of-three-nickel-titanium-rotary-instruments-a-micro-computed-tomography-study-via-a-contrast-radiopaque-technique-in-vitro
#14
Zhao Wei, Zhi Cui, Ping Yan, Han Jiang
BACKGROUND: Micro-CT (μCT) studies that combine simulated canals with meglucamine diatrizoate to evaluate the shaping ability of nickel-titanium (NiTi) rotary instruments are lacking in the literature. The purpose of this study was to evaluate the shaping ability of three new different nickel-titanium rotary instruments in simulated root canals using μCT. METHODS: Thirty simulated root canals with a curvature of 60° were randomly allocated into the following 3 groups (n = 10): Group 1, ProTaper Universal (PTU) rotary system; Group 2, Reciproc single-file system; and Group 3, K3XF rotary system...
January 9, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28068207/the-effect-of-diode-laser-on-planktonic-enterococcus-faecalis-in-infected-root-canals-in-an-ex-vivo-model
#15
Gilda Cretella, Carlo Lajolo, Raffaella Castagnola, Francesco Somma, MariaTeresa Inchingolo, Luca Marigo
OBJECTIVE: This study examined the bactericidal effect of diode laser irradiation against intracanal Enterococcus faecalis. METHODS AND MATERIALS: m total of 128 extracted single-rooted and single-canal teeth were treated with ProTaper instruments (Dentsply Maillefer, Ballaigues, Switzerland). A total of 120 root canals were inoculated with E. faecalis for 21 days, and the samples were randomly divided into five groups: Group 1 (n = 24) samples were irrigated with only saline solution (positive controls); Group 2 (n = 24) was treated with only 5...
January 9, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28068186/bactericidal-efficacy-of-photodynamic-therapy-and-chitosan-in-root-canals-experimentally-infected-with-enterococcus-faecalis-an-in-vitro-study
#16
Fabio Camacho-Alonso, Encarnación Julián-Belmonte, Fernando Chiva-García, Yolanda Martínez-Beneyto
OBJECTIVE: To evaluate the antibacterial efficacy of photodynamic therapy (PDT) and chitosan against Enterococcus faecalis and assess the possible enhancive effect of chitosan on the photosensitizer methylene blue in experimentally infected root canals of extracted human teeth in vitro. BACKGROUND DATA: E. faecalis is frequently found in persistent endodontic infections. In this context, the antimicrobial PDT or newer antibacterial alternatives such as chitosan could become modern alternatives to existing antibacterial treatment approaches...
January 9, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28067979/comparing-fracture-resistance-and-the-time-required-for-two-different-fiber-post-removal-systems
#17
Seda Aydemir, Göze Arukaslan, Serkan Sarıdağ, Işıl Kaya-Büyükbayram, Yasemin Ylıdıran
PURPOSE: To compare two fiber post removal techniques in terms of fracture resistance and time required for post removal. MATERIALS AND METHODS: Post space was prepared to a 9-mm depth in each root canal. The roots were randomly divided into three groups of 15 specimens each. D.T. Light-Posts were cemented in all groups. In group 1, fiber posts were removed using the D.T. Light-Post-removal kit; in group 2, Start-X stainless-steel ultrasonic tips were used. In group 3, fiber posts were left without removal (the control group)...
January 9, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28065860/influence-of-ultrasonic-activation-over-final-irrigants-in-the-removal-of-photosensitizer-from-root-canal-walls-after-photodynamic-therapy
#18
Matheus Albino Souza, Bianca Pazinatto, Karolina Frick Bischoff, Huriel Scartazzini Palhano, Doglas Cecchin, José Antônio Poli de Figueiredo
INTRODUCTION: The aim of the present study was to evaluate the influence of ultrasonic activation (US) of the final irrigant in the removal of the photosensitizer from root canal walls after photodynamic therapy. METHODS: The root canals of 60 single-rooted bovine extracted teeth were filled with 0.01% methylene blue and submitted to photodynamic therapy for 90seconds. After that, the roots were divided into six groups (n=10) according to the final irrigation protocol: distilled water (DW), DW+US, 17% EDTA, QMix, EDTA+US, and QMix+US...
January 5, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28061791/incidence-of-pulp-sensibility-loss-of-anterior-teeth-after-paramedian-insertion-of-orthodontic-mini-implants-in-the-anterior-maxilla
#19
Jan Hourfar, Dirk Bister, Jörg A Lisson, Björn Ludwig
BACKGROUND: The aim of this retrospective investigation was to evaluate the incidence of loss to pulp sensibility testing (PST) of maxillary front teeth after paramedian (3 to 5 mm away from the suture) orthodontic mini-implant (OMI) insertion in the anterior palate. METHODS: A total of 284 patients (102 males, 182 females; mean age was 14.4 years (±8.8) years at time of OMI-Insertion) with a total of 568 OMIs (1.7 mm diameter, length 8 mm) were retrospectively investigated...
January 6, 2017: Head & Face Medicine
https://www.readbyqxmd.com/read/28060908/experimental-mouse-model-of-lumbar-ligamentum-flavum-hypertrophy
#20
Takeyuki Saito, Kazuya Yokota, Kazu Kobayakawa, Masamitsu Hara, Kensuke Kubota, Katsumi Harimaya, Kenichi Kawaguchi, Mitsumasa Hayashida, Yoshihiro Matsumoto, Toshio Doi, Keiichiro Shiba, Yasuharu Nakashima, Seiji Okada
Lumbar spinal canal stenosis (LSCS) is one of the most common spinal disorders in elderly people, with the number of LSCS patients increasing due to the aging of the population. The ligamentum flavum (LF) is a spinal ligament located in the interior of the vertebral canal, and hypertrophy of the LF, which causes the direct compression of the nerve roots and/or cauda equine, is a major cause of LSCS. Although there have been previous studies on LF hypertrophy, its pathomechanism remains unclear. The purpose of this study is to establish a relevant mouse model of LF hypertrophy and to examine disease-related factors...
2017: PloS One
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