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https://www.readbyqxmd.com/read/29691559/-application-of-nd-yap-laser-in-dental-pulp-revascularization
#1
Xian Liu, Yun-Feng Yao, Xin-Yi Xu
PURPOSE: To compare the effect of Nd:YAP laser and Hoshino's triple antibiotic paste on root canal disinfection in the treatment of pulp revascularization, and to provide reference for root canal disinfection in dental pulp revascularization. METHODS: Forty immature permanent teeth diagnosed as acute or chronic periapical periodontitis were included. The periapical lesions and root development were recorded. The cases were divided into 2 groups: the control group and the Nd:YAP laser disinfection experimental group...
December 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/29689407/immobilization-of-triclosan-and-erythrosine-in-layer-by-layer-films-applied-to-inactivation-of-microorganisms
#2
Maria F Costa Pedro, Alessandro S Kalck, Kevin F Dos Santos, Marcos S Sousa, Karla B Romio, Paula C S Souto, Josmary R Silva, Nara C de Souza
The use of the layer-by-layer (LbL) deposition technique allows materials, such as drugs, to be self-assembled in multilayers with other electrolytes by combining their properties in a nanostructured system. Triclosan (TCS) is commonly used as a drug because of its bactericidal action, while erythrosine (ERY) has been used as a photosensitizer in photodynamic therapies because of its high light absorptivity in the visible region of the electromagnetic spectrum. The major advantage of investigating systems immobilized in LbL films is the benefit of characterizing the interaction through available substances in solid state techniques...
April 21, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29682545/curcumin-as-a-promising-antibacterial-agent-effects-on-metabolism-and-biofilm-formation-in-s-mutans
#3
Bingchun Li, Xinlong Li, Huancai Lin, Yan Zhou
Streptococcus mutans (S. mutans) has been proved to be the main aetiological factor in dental caries. Curcumin, a natural product, has been shown to exhibit therapeutic antibacterial activity, suggesting that curcumin may be of clinical interest. The objective of this study is to evaluate the inhibitory effects of curcumin on metabolism and biofilm formation in S. mutans using a vitro biofilm model in an artificial oral environment. S. mutans biofilms were treated with varying concentrations of curcumin. The biofilm metabolism and biofilm biomass were assessed by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay and the crystal violet assay...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29681055/reproducing-the-internal-and-external-anatomy-of-fossil-bones-two-new-automatic-digital-tools
#4
Antonio Profico, Stefan Schlager, Veronica Valoriani, Costantino Buzi, Marina Melchionna, Alessio Veneziano, Pasquale Raia, Jacopo Moggi-Cecchi, Giorgio Manzi
OBJECTIVES: We present two new automatic tools, developed under the R environment, to reproduce the internal and external structures of bony elements. The first method, Computer-Aided Laser Scanner Emulator (CA-LSE), provides the reconstruction of the external portions of a 3D mesh by simulating the action of a laser scanner. The second method, Automatic Segmentation Tool for 3D objects (AST-3D), performs the digital reconstruction of anatomical cavities. MATERIALS AND METHODS: We present the application of CA-LSE and AST-3D methods to different anatomical remains, highly variable in terms of shape, size and structure: a modern human skull, a malleus bone, and a Neanderthal deciduous tooth...
April 21, 2018: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29674703/difference-in-virulence-and-composition-of-a-cariogenic-biofilm-according-to-substratum-direction
#5
Minh-Huy Dang, Ji-Eun Jung, Hyeon-Mi Choi, Jae-Gyu Jeon
The aim of this study was to investigate the difference in composition and virulence of Streptococcus mutans biofilms according to substratum direction. S. mutans biofilms (46-h-old) were formed on three different saliva-coated hydroxyapatite (sHA) disc direction groups: downward (discs placed in the direction of gravity), vertical (discs placed parallel to gravity direction), and upward (discs placed opposite to gravity). The 46-h-old biofilms on sHA discs in the upward direction showed the highest biofilm accumulation, colony forming unit (CFU) count, and extracellular polysaccharide (EPS) amount, followed by those in the vertical and downward directions...
April 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29673709/evaluation-of-the-filler-packing-structures-in-dental-resin-composites-from-theory-to-practice
#6
Ruili Wang, Eric Habib, X X Zhu
OBJECTIVES: The aim of this study is to evaluate the packing properties of uniform silica particles and their mixture with secondary particles yielding maximally loaded dental composites. We intend to verify the difference between the idealized models (the close-packed structures and the random-packed structures) and the actual experimental results, in order to provide guidance for the preparation of dental composites. The influence of secondary particle size and the resin composition on the physical-mechanical properties and the rheological properties of the experimental dental composites was also investigated...
April 16, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29643526/-exploring-a-new-method-for-superimposition-of-pre-treatment-and-post-treatment-mandibular-digital-dental-casts-in-adults
#7
F F Dai, Y Liu, T M Xu, G Chen
OBJECTIVE: To explore a cone beam computed tomography (CBCT)-independent method for mandibular digital dental cast superimposition to evaluate three-dimensional (3D) mandibular tooth movement after orthodontic treatment in adults, and to evaluate the accuracy of this method. METHODS: Fifteen post-extraction orthodontic treatment adults from the Department of Orthodontics, Peking University School and Hospital of Stomatology were included. All the patients had four first premolars extracted, and were treated with straight wire appliance...
April 18, 2018: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29642566/in-vitro-and-in-vivo-osteogenic-activity-of-titanium-implants-coated-by-pulsed-laser-deposition-with-a-thin-film-of-fluoridated-hydroxyapatite
#8
Luyuan Chen, Satoshi Komasa, Yoshiya Hashimoto, Shigeki Hontsu, Joji Okazaki
To enhance biocompatibility, osteogenesis, and osseointegration, we coated titanium implants, by krypton fluoride (KrF) pulsed laser deposition, with a thin film of fluoridated hydroxyapatite (FHA). Coating was confirmed by scanning electron microscopy (SEM) and scanning probe microscopy (SPM), while physicochemical properties were evaluated by attenuated reflectance Fourier transform infrared spectroscopy (ATR-FTIR). Calcium deposition, osteocalcin production, and expression of osteoblast genes were significantly higher in rat bone marrow mesenchymal stem cells seeded on FHA-coated titanium than in cells seeded on uncoated titanium...
April 10, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29627213/macro-and-microtopographical-examination-and-quantification-of-cad-cam-composite-resin-2-and-3-body-wear
#9
Carolin Stöckl, Rüdiger Hampe, Bogna Stawarczyk, Miriam Haerst, Malgorzata Roos
STATEMENT OF PROBLEM: The selection of an appropriate restorative material based on wear behavior is important for the long-term success of a dental restoration. For computer-aided design and computer-aided manufacturing (CAD-CAM) composite resins, information about their wear resistance and wear mechanism is scarce. PURPOSE: The purpose of this in vitro study was to compare the 2- and 3-body wear of CAD-CAM composite resins with that of lithium disilicate ceramic and to develop analysis software...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29627208/influence-of-repeated-firings-on-marginal-axial-axio-occlusal-and-occlusal-fit-of-metal-ceramic-restorations-fabricated-with-different-techniques
#10
Özay Önöral, Mutahhar Ulusoy, Emre Seker, İlker Etikan
STATEMENT OF PROBLEM: Ill-fitting restorations can jeopardize dental, periodontal, and systemic health. Repeated ceramic firing may influence the fitting accuracy of restorations, but scientific information regarding this issue is lacking. PURPOSE: The purpose of this in vitro study was to assess and compare the influence of repeated firings on the marginal, axial, axio-occlusal, and occlusal fit of metal-ceramic 3-unit fixed partial dentures (FPDs) manufactured with different framework methods, including casting, fully sintered hard alloy milling (FHAM), presintered soft alloy milling (PSAM), and selective laser sintering (SLS)...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29627206/comparative-analysis-of-the-microstructures-and-mechanical-properties-of-co-cr-dental-alloys-fabricated-by-different-methods
#11
Yanan Zhou, Ning Li, Jiazhen Yan, Qiang Zeng
STATEMENT OF PROBLEM: Limited information is available regarding the microstructures and mechanical properties of Co-Cr dental alloys prepared using conventional casting (CAST), computer numerical control (CNC) milling, and selective laser melting (SLM). PURPOSE: The purpose of this in vitro study was to evaluate the mechanical properties and microstructures of Co-Cr dental alloys fabricated using conventional casting, computer numerical control milling, and selective laser melting and to estimate the potential of applying the SLM technique in prosthetic dentistry...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29599596/diode-laser-and-periodontal-regeneration-assisted-management-of-implant-complications-in-anterior-maxilla
#12
Sanjeev Kumar Salaria, Isha Sharma, Navjot Kaur Brar, Satwant Kaur
Dental implant is being considered successful if the patient is pleased with both of its functional and esthetic outcome. As implant complications (such as peri-implantitis, inappropriate implant position, wrong angulation, and implant location too close to anatomical structures) have been frequently encountered in dental practice, therefore, thorough knowledge to manage such complications is the key prerequisite to prevent the failure of implant. The present case report discussed the etiology, diagnosis of early peri-implantitis, and periodontal abscess with their successful management through periodontal regeneration and diode laser-assisted therapy...
January 2018: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29588823/histological-evaluation-of-orthodontic-tooth-movement-following-low-level-laser-irradiation-in-rabbits
#13
Mostafa Abtahi, Nasrollah Saghravanian, Maryam Poosti, Hooman Shafaee
Background: Reduction of orthodontic treatment time is a major concern for orthodontists. Low level laser therapy (LLL) has been widely used in dentistry and it has been claimed that it could stimulate bone formation. Objective: The aim of the present study was to evaluate histological effects of LLL on alveolar bone remodeling during experimental tooth movement in rabbits. Methods: In this experimental study which was performed in the animal lab of Mashhad Dental School in 2016 twenty pre-pubertal female albino rabbits with the mean age of 8±1 weeks were randomly assigned into two groups...
January 2018: Electronic Physician
https://www.readbyqxmd.com/read/29584683/mechanical-and-thermal-properties-of-dental-composites-cured-with-cad-cam-assisted-solid-state-laser
#14
Roberto De Santis, Antonio Gloria, Saverio Maietta, Massimo Martorelli, Alessandro De Luca, Gianrico Spagnuolo, Francesco Riccitiello, Sandro Rengo
Over the last three decades, it has been frequently reported that the properties of dental restorative composites cured with argon laser are similar or superior to those achieved with conventional halogen and light emitting diode (LED) curing units. Whereas laser curing is not dependent on the distance between the curing unit and the material, such distance represents a drawback for conventional curing units. However, a widespread clinical application of this kind of laser remains difficult due to cost, heavy weight, and bulky size...
March 27, 2018: Materials
https://www.readbyqxmd.com/read/29577710/etiological-periodontal-treatment-with-and-without-low-level-laser-therapy-on-il-1%C3%AE-level-in-gingival-crevicular-fluid-an-in-vivo-multicentric-pilot-study
#15
F Mastrangelo, A Dedola, F Cattoni, F Ferrini, F Bova, M Tatullo, E Gherlone, L Lo Muzio
Cytokine proteins may have important roles during different human physiological and pathological processes. In the oral cavity, the bone loss and periodontal tissue pathology was related to inflammatory process activation. The aim of the present study was to assess the effects of etiological periodontal therapy with and without the use of Low Level Laser Therapy (LLLT) on clinical periodontal parameters and interleukin (IL)-1β level in gingival crevicular fluid (GCF) from chronic periodontitis (CP) patients...
March 26, 2018: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/29572134/replacement-of-the-distorted-dentition-of-the-cone-beam-computed-tomography-scans-for-orthognathic-surgery-planning
#16
Turki Almutairi, Kurt Naudi, Neil Nairn, Xiangyang Ju, John Whitters, Aashraf Ayoub
PURPOSE: Cone-beam computed tomography (CBCT) does not record dental morphology accurately because of the scattering produced by metallic restorations and the reported magnification. The aim of this study was the development and evaluation of a new method for the replacement of the distorted dentition of CBCT scans with a 3-dimensional (3D) dental image captured by a digital intraoral camera. MATERIALS AND METHODS: Six dried skulls with orthodontic brackets fixed on the teeth were used in this study...
February 28, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29571914/diagnostic-accuracy-of-5-dental-pulp-tests-a-systematic-review-and-meta-analysis
#17
REVIEW
Anshul Mainkar, Sahng G Kim
INTRODUCTION: The aim of this systematic review was to investigate and compare the diagnostic accuracy including sensitivity, specificity, adjusted accuracy, adjusted positive predictive value (PPV), and adjusted negative predictive value (NPV) of cold pulp testing (CPT), heat pulp testing (HPT), electric pulp testing (EPT), laser Doppler flowmetry (LDF), and pulse oximetry (PO). METHODS: Three electronic databases were searched from January 1964 to December 2016...
March 20, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29550021/ethical-and-legal-ramifications-of-using-diode-lasers-for-nonsurgical-periodontal-therapy
#18
Robert A Convissar
BACKGROUND: Lasers are promoted as viable adjunctive treatment methods for nonsurgical periodontal pocket reduction; however, the literature supporting this use is lacking. Multiple meta-analyses found no benefit to laser use for this procedure. The American Dental Association issued clinical practice guidelines about laser use in periodontal pockets, concluding that diode, neodymium:yttrium-aluminum-garnet, and erbium lasers have no benefit as adjunctive therapies to scaling and root planing...
March 13, 2018: Journal of the American Dental Association
https://www.readbyqxmd.com/read/29537665/pulpotomy-management-using-laser-diode-in-pediatric-patient-with-severe-hemophilia-a-under-general-anesthesia-a-case-report
#19
Vo Truong Nhu Ngoc, Trinh Do Van Nga, Dinh-Toi Chu, Le Quynh Anh
Hemophilia-a bleeding disorder due to the lack of clotting factors-is mostly induced by genetic factors. Its most common type is hemophilia A. Hemorrhage in hemophilia A may occur in several different sites of the body, including those inside the oral cavity, such as mucous membrane and gum. However, only a few studies and case reports on dental issues of hemophilia A patients have been conducted. In clinical dentistry, treatment procedures are invasive, possibly leading to more severe bleeding, especially in hemophilia A cases...
March 14, 2018: Special Care in Dentistry
https://www.readbyqxmd.com/read/29536538/effective-removal-of-calcified-deposits-on-microstructured-titanium-fixture-surfaces-of-dental-implants-with-erbium-lasers
#20
Toru Takagi, Akira Aoki, Shizuko Ichinose, Yoichi Taniguchi, Noriko Tachikawa, Takeshi Shinoki, Walter Meinzer, Anton Sculean, Yuichi Izumi
BACKGROUND: Recently, the occurrence of peri-implantitis has been increasing. However, a suitable method to debride the contaminated surface of titanium implants has not been established. The aim of this study was to investigate the morphological changes of the microstructured fixture surface after erbium laser irradiation, and to clarify the effects of the erbium lasers when used to remove calcified deposits from implant fixture surfaces. METHODS: In experiment 1, sandblasted, large grit, acid etched surface implants were treated with Er:YAG laser or Er,Cr:YSGG laser at 30-60 mJ/pulse and 20 Hz with water spray...
March 13, 2018: Journal of Periodontology
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