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Odontology

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https://www.readbyqxmd.com/read/30019170/a-5-year-prospective-clinical-trial-on-short-implants-6-mm-for-single-tooth-replacement-in-the-posterior-maxilla-immediate-versus-delayed-loading
#1
Mustafa Ayna, Bastian Wessing, Ralf Gutwald, Andreas Neff, Thomas Ziebart, Yahya Açil, Jörg Wiltfang, Aydin Gülses
The aim of this paper was to demonstrate the treatment outcomes following immediate functional loading concept of short implants inserted for single tooth replacement in the posterior maxilla. The study was performed on 63 patients who received short (6 mm) implants for single tooth replacement in the posterior maxilla. Forty-eight patients underwent immediate functional concept, whereas 15 of the implants were loaded 3 months after insertion. The patients were evaluated for up to 5 years after prosthesis completion...
July 17, 2018: Odontology
https://www.readbyqxmd.com/read/30019169/pathogenesis-of-igg4-related-disease-a-critical-review
#2
Takashi Maehara, Masafumi Moriyama, Seiji Nakamura
Immunoglobulin G4 (IgG4)-related disease (IgG4-RD) is a chronic, systemic, inflammatory condition of unknown etiology. Histopathologic examination is the key to diagnosis of IgG4-RD. The histopathologic features of IgG4-RD are lymphoplasmacytic infiltration, storiform fibrosis, and obliterative phlebitis. As for fewer than 15 years, IgG4-RD has been recognized as a unified diagnostic entity. CD4+ T and B cells, which likely cause organ damage and disabling tissue fibrosis, constitute the major inflammatory cell population in patients with IgG4-RD...
July 17, 2018: Odontology
https://www.readbyqxmd.com/read/29978283/effects-of-sulfuric-and-vinyl-sulfonic-acid-etchants-on-bond-strength-of-resin-composite-to-polyetherketoneketone
#3
Michino Sakihara, Yohsuke Taira, Takashi Sawase
This study aims to evaluate the effects of etching with sulfuric acid (SA) and vinyl sulfonic acid (VSA) on the bond strength between a light-curing indirect resin composite and polyetherketoneketones (PEKK). PEKK specimens were ground with 600 silicon carbide papers, etched with 90% SA for 5 s (90-5 SA) or 95% VSA for 30 s (95-30 VSA), and then modified with a phosphate primer; afterward, a light-curing resin composite was veneered on the specimens. Two control groups were also prepared without etching (unetched/unprimed and unetched/primed)...
July 5, 2018: Odontology
https://www.readbyqxmd.com/read/29961213/teeth-whitening-with-6-hydrogen-peroxide-and-its-impact-on-quality-of-life-2-years-of-follow-up
#4
Cristian Bersezio, Javier Martín, Pablo Angel, Jessica Bottner, Isidora Godoy, Francisca Avalos, Eduardo Fernández
This study aimed to evaluate color longevity after 2 years of whitening gel (6% hydrogen peroxide (HP), blue LED/infrared laser activation system) in comparison to a control 35% concentration in a split-mouth study and investigate the long-term effect on quality of life (QOL).Thirty-one patients were treated. Whitening using 6% or 35% HP gel was performed on half of the upper jaw in each patient. The color was measured at baseline and 1 week, 1 month, 1 and 2 years after treatment using the Easyshade Vita spectrophotometer and the Vita Bleached and Vita Classical Shade Guides organized by value...
June 30, 2018: Odontology
https://www.readbyqxmd.com/read/29959559/oxidative-stress-induced-by-porphyromonas-gingivalis-lysate-and-nicotine-in-human-periodontal-ligament-fibroblasts
#5
Thuy Thu Nguyen, Nam Nhat-Cong Huynh, Sujiwan Seubbuk, Thanapoj Nilmoje, Aree Wanasuntronwong, Rudee Surarit
Porphyromonas gingivalis (P. gingivalis) and nicotine have been implicated as a major pathogen in the development and progression of periodontitis. One of the possible mechanism is via the oxidative stress of human periodontal ligament fibroblasts (PDLF) which lead to the damage of cell viability and function. This study aimed to investigate oxidative stress (OS) levels in the cultured media of human PDLF under the induction of P. gingivalis lysate and nicotine. Primary PDLF was cultured in growth media under P...
June 29, 2018: Odontology
https://www.readbyqxmd.com/read/29956060/effectiveness-of-irrigation-strategies-on-the-removal-of-the-smear-layer-from-root-canal-dentin
#6
Prasanna Neelakantan, Hani F Ounsi, Sharmila Devaraj, Gary S P Cheung, Simone Grandini
The aim of this study was to evaluate the removal of the smear layer by some commonly used (needle-and-syringe irrigation, sonic activation, ultrasonically activated irrigation) and new root canal irrigation strategies (negative pressure irrigation and polymer rotary file) using a novel approach by comparing pre- and post-experimental images. Prepared root canals (n = 50) were subjected to a split tooth model and divided into 5 groups (n = 10): (1) needle-and-syringe irrigation (control); (2) sonic activation (SA); (3) negative pressure irrigation with continuous warm activated irrigation and evacuation (CWA); (4) polymer finishing file (FF); (5) ultrasonically activated irrigation (UAI)...
June 28, 2018: Odontology
https://www.readbyqxmd.com/read/29943284/the-lingual-nerve-overview-and-new-insights-into-anatomical-variability-based-on-fine-dissection-using-human-cadavers
#7
REVIEW
Mounir Ghabriel, Kojiro Takezawa, Grant Townsend
This article, for both researchers and clinicians, presents an overview of the lingual nerve and highlights how new insights into human anatomical variability can be gained by integrating fine dissection of cadavers with neuroanatomical approaches, microscopic studies, and morphometric techniques. Textbooks mainly provide descriptions of the typical or common gross anatomical appearance of structures in the human body with little reference to the nature and extent of variation that may be encountered within and between populations...
June 25, 2018: Odontology
https://www.readbyqxmd.com/read/29948491/polymerization-shrinkage-and-shrinkage-force-kinetics-of-high-and-low-viscosity-dimethacrylate-and-ormocer-based-bulk-fill-resin-composites
#8
Tobias T Tauböck, Franziska Jäger, Thomas Attin
The aim of the present study was to investigate polymerization shrinkage, shrinkage force development, and degree of monomer conversion of high- and low-viscosity dimethacrylate- and ormocer-based bulk-fill resin composites. Two flowable bulk-fill composites (SDR, x-tra base), two high-viscosity bulk-fill composites (Bulk Ormocer, SonicFill), and two conventional composite materials (Esthet X flow, Esthet X HD) were photoactivated for 20 s at 1275 mW/cm2 . Linear polymerization shrinkage and shrinkage force were recorded in real time using custom-made devices, and the force rate and time to achieve maximum force rate were determined...
June 13, 2018: Odontology
https://www.readbyqxmd.com/read/29948490/effects-of-crown-movement-on-periodontal-biotype-a-digital-analysis
#9
Lucio Lo Russo, Khrystyna Zhurakivska, Graziano Montaruli, Angelo Salamini, Crescenzio Gallo, Giuseppe Troiano, Domenico Ciavarella
Orthodontic treatment has important correlations with periodontal changes. Various mechanical and biological factors are involved in determining such changes, but anatomical and morphological variables, generally addressed as periodontal biotype, play a key role. In measurement of such modifications, digital and non-contact reverse engineering technologies may be of tremendous advantage. The aim of this study is to retrospectively evaluate, in a series of digitized dental casts, some of the parameters addressing periodontal biotype and correlate them to extent and direction of tooth movement...
June 12, 2018: Odontology
https://www.readbyqxmd.com/read/29948489/impact-of-dexmedetomidine-on-the-tissue-distribution-anesthetic-action-and-hemodynamic-effects-of-mepivacaine
#10
Yuri Yasuda, Shuichi Hashimoto, Katsuhisa Sunada
The present study investigated the regional blood flow, tissue distribution, local anesthetic action, and hemodynamic effects of mepivacaine containing dexmedetomidine hydrochloride (DEX) in rats. Blood flow was measured after injection of 0.5% mepivacaine (M group), 12.5 µg/ml DEX (D group), or 0.5% mepivacaine containing 12.5 µg/ml DEX (DM group) into the upper lip. Mepivacaine distribution was autoradiographically observed in maxillary bone resected after injection of 0.5% 3 H-mepivacaine (HM group) or 0...
June 11, 2018: Odontology
https://www.readbyqxmd.com/read/29845402/clinical-study-on-natural-gingival-color
#11
Cristina Gómez-Polo, Javier Montero, Miguel Gómez-Polo, Ana María Martín Casado
The aims of the study were: to describe the gingival color surrounding the upper incisors in three sites in the keratinized gingiva, analyzing the effect of possible factors which modulate (socio-demographic and behavioral) intersubject variability; to study whether the gingiva color is the same in all three locations and to describe intrasubject color differences in the keratinized gingiva band. Using the CIELAB color system, three reference areas (free gingival margin, keratinized gingival body, and birth or upper part of the keratinized gingiva) were studied in 259 individuals, as well as the related socio-demographic factors, oral habits and the chronic intake of medication...
May 29, 2018: Odontology
https://www.readbyqxmd.com/read/29797142/systemic-hematogenous-dissemination-of-mouse-oral-candidiasis-is-induced-by-oral-mucositis
#12
Hiroki Katagiri, Kayoko Fukui, Kenjirou Nakamura, Akira Tanaka
The causes of fungemia include immunosuppression and neutropenia stemming from diverse factors as well as the placement of central venous catheters. However, the relationship between fungemia and the oral cavity has not been substantiated. In this study, we explored the pathological conditions of Candida albicans-derived oral candidiasis in a mouse model, which always develops oral mucositis as a complication. In oral candidiasis, the hyphae of C. albicans are believed to primarily invade the stratum granulosum, but not the subepithelium, of the mucous membrane...
May 24, 2018: Odontology
https://www.readbyqxmd.com/read/29796959/dentin-bonding-and-physicochemical-properties-of-adhesives-incorporated-with-epigallocatechin-3-gallate
#13
Francisco Adeilson Alves de Macedo, Nayara O Souza, Marcelo Victor Sidou Lemos, Diego Martins De-Paula, Sergio Lima Santiago, Victor Pinheiro Feitosa
The aim was to assess dentin adhesion and physicochemical properties of experimental etch-and-rinse and self-etch adhesives doped with epigallocatechin-3-gallate (EGCG), a well-known collagen crosslinker obtained from green tea (Camellia sinensis). Experimental adhesives were prepared without (0 wt%), with 0.1 or 0.5 wt% EGCG addition. Their degree of conversion was surveyed by FTIR, and bar-shaped specimens were tested to obtain flexural strength and modulus initially and after 1-week ethanol storage. Extracted human molars were prepared, bonded, and cut into resin-dentin sticks for microtensile bond strength test, which was conducted after 24 h or 6-month water storage...
May 23, 2018: Odontology
https://www.readbyqxmd.com/read/29777391/shaping-ability-of-reciprocating-single-file-systems-in-severely-curved-canals-waveone-and-reciproc-versus-waveone-gold-and-reciproc-blue
#14
Sebastian Bürklein, Stefanie Flüch, Edgar Schäfer
The aim was to compare the canal straightening of M-wire [Reciproc (VDW, Munich, Germany) and WaveOne (Dentsply Maillefer, Ballaigues, Switzerland)] and gold- and blue-wire heat-treated [Reciproc blue (VDW) and WaveOne Gold (Dentsply Maillefer)] instruments in severely curved root canals. A total of 80 root canals in extracted human teeth with angles of curvatures ranging between 25° and 35° and radii ranging between 3.1 and 8.5 mm were divided into four groups (n = 20). Based on radiographs taken prior to instrumentation, the groups were balanced with respect to the angle and the radius of canal curvature (P = 1...
May 18, 2018: Odontology
https://www.readbyqxmd.com/read/29752597/the-higher-prevalence-of-developmental-defects-of-enamel-in-the-dioxin-affected-region-than-non-dioxin-affected-region-result-from-a-cross-sectional-study-in-vietnam
#15
Vo Truong Nhu Ngoc, Le Thi Huong, Bui Van Nhon, Ngo Thi Minh Tan, Pham Van Thuc, Vo Thi Thu Hien, Truong Manh Dung, Ngo Van Toan, Le Quynh Anh, Le Hoang Son, Thien Chu-Dinh, Dinh-Toi Chu
Developmental defects of enamel (DDE) are induced and regulated by several factors including genetics and the environment. There is evidence showing that dioxin in polluted areas has a strong effect on the health and development of teeth. However, there has been no study on DDE in the dioxin-affected regions in Vietnam. To identify the effect of dioxin on the prevalence of DDE in studied areas in Vietnam, a cross-sectional study was conducted in 2200 adults in the A Luoi district in the Thua Thien Hue province (the dioxin-affected region) and in the Kim Bang district in the Ha Nam province (dioxin-unaffected region) in 2015...
May 11, 2018: Odontology
https://www.readbyqxmd.com/read/29713913/osteonecrosis-of-the-jaw-in-patients-transitioning-from-bisphosphonates-to-denosumab-treatment-for-osteoporosis
#16
P J Voss, D Steybe, P Poxleitner, R Schmelzeisen, C Munzenmayer, H Fuellgraf, A Stricker, W Semper-Hogg
Antiresorptive-related osteonecrosis of the jaw (ARONJ) is a rare but severe side effect of antiresorptive treatment with bisphosphonates or RANKL-antibody denosumab in patients with malignant diseases or osteoporosis. Whilst osteonecrosis of the jaw (ONJ) related to the administration of bisphosphonates (BPs) has been investigated for more than 1 decade now, only few data are available on denosumab-related ONJ, especially in patients with osteoporosis. From 2008 to 2016, 52 osteoporosis patients were treated with ARONJ in the Department of Oral and Maxillofacial Surgery, University Medical Center Freiburg, Germany...
April 30, 2018: Odontology
https://www.readbyqxmd.com/read/29704075/influence-of-fluoride-varnish-on-shear-bond-strength-of-a-universal-adhesive-on-intact-and-demineralized-enamel
#17
Antonio José Ortiz-Ruiz, Iban Jesús Muñoz-Gómez, Ana Pérez-Pardo, Concepción Germán-Cecilia, Yolanda Martínez-Beneyto, Ascensión Vicente
The aim was to evaluate the effect of fluoride varnish on the shear bond strength (SBS) on polished and non-polished intact and demineralized enamel. Bovine incisors (half demineralized) were used. Bifluorid 12™ was applied. Bonding was made with Futurabond® M + and GrandioSO, 24 h and 7 days after varnishing. In some groups, varnish was removed by polishing before bonding. SBS was measured. Fracture type was determined by stereomicroscopy and scanning electron microscope (SEM) observations of the enamel surface were made...
April 27, 2018: Odontology
https://www.readbyqxmd.com/read/29687274/comparison-of-two-color-difference-formulas-using-the-bland-altman-approach-based-on-gingiva-color-space
#18
Cristina Gómez Polo, Javier Montero, Ana Maria Martín Casado
The objectives of this study were to determine the relationship between the results provided by the classical CIELab (ΔE ab *) and the CIEDE2000 (ΔE00) formulas and the gingival color space using the Bland and Altman limits of agreement, to use this relationship to establish the equivalences between the gingival color thresholds of perceptibility of both formulas, and to evaluate whether the relationship between ΔE ab * and ΔE00 is modified depending on the axis in which the changes occur. The means of the L*, a*, and b* coordinates of the 21 gingiva porcelain samples (Heraceram, Heraeus Kulzer Mitsui Chemical Groups) were used and the differences in color were calculated in 210 pairs of samples using the CIELab (ΔE*ab) and CIEDE2000 (ΔE00) color-difference formulas...
April 23, 2018: Odontology
https://www.readbyqxmd.com/read/29470736/correction-to-color-stability-of-different-composite-resins-after-polishing
#19
Stefano Ardu, O Duc, E Di Bella, I Krejci, René Daher
In the original publication of the article, the author's name "Prof. René Daher" was inadvertently missed in the author group. This has been updated in this erratum. Also, the original article has been corrected.
July 2018: Odontology
https://www.readbyqxmd.com/read/29468332/evaluation-of-tongue-volume-and-oral-cavity-capacity-using-cone-beam-computed-tomography
#20
Xuefang Ding, Shoichi Suzuki, Momotoshi Shiga, Naoto Ohbayashi, Toru Kurabayashi, Keiji Moriyama
The aims of this study were to reveal the usefulness of a newly developed method for measuring tongue volume (TV) and oral cavity capacity (OCC) and to assess the relationship between them. The tongue was coated with a contrast agent, and the TV and OCC were determined using cone-beam computed tomography (CBCT). We enrolled 20 adults who were scheduled to undergo CBCT to evaluate the relationship of the third molar roots to the alveolar nerve before molar extraction. Each participant's tongue was coated with a contrast agent, and CBCT of the tongue and oral cavity was performed...
July 2018: Odontology
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