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https://www.readbyqxmd.com/read/29436969/evaluation-of-effectiveness-of-cement-removal-from-implant-retained-crowns-using-a-proposed-circular-crisscross-flossing-technique
#1
Cimara Fortes Ferreira, Mohamed Amer Shafter, Vinay Jain, Russel Anthony Wicks, Erno Linder, Carlos Alberto da Silva Ledo
BACKGROUND: Extruded cement during dental implant crown cementation may cause peri-implant diseases if not removed adequately. AIM: Evaluate the efficiency of removal of cement after cementation of implant crowns using an experimental "circular crisscross flossing technique (CCCFT) flossing technique, compared to the conventional "C" shape flossing technique (CSFT). MATERIAL AND METHODS: Twenty-four patients rendered 29 experimental and 29 control crowns...
February 13, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29435764/histochemical-examination-on-the-peri-implant-bone-with-early-occlusal-loading-after-the-immediate-placement-into-extraction-sockets
#2
Yoshiki Ikeda, Tomoka Hasegawa, Tomomaya Yamamoto, Paulo Henrique Luiz de Freitas, Kimimitsu Oda, Akiko Yamauchi, Atsuro Yokoyama
Early and immediate loading of dental implants has become a routine procedure in dental practices throughout the world, but the histological feature of peri-implant bone has not been fully understood. Therefore, we aimed to elucidate the histological response of peri-implant bone bearing the early occlusal loading using rat models. Four-week-old male Wistar rats were subjected to extraction of their maxillary left first molars and had titanium implants inserted immediately into the post-extraction sockets. In experimental groups at 1 week after placement, implants were loaded for 1 or 2 weeks by adding adhesive resin on the top of the screws...
February 12, 2018: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29428522/evaluation-of-the-fit-of-zirconia-copings-fabricated-by-direct-and-indirect-digital-impression-procedures
#3
Bora Lee, Kyung Chul Oh, Daewon Haam, Joon-Hee Lee, Hong-Seok Moon
STATEMENT OF PROBLEM: Intraoral scanners are effective for direct digital impression when dental restorations are fabricated using computer-aided design and computer-aided manufacturing (CAD-CAM); however, if the abutment tooth cannot be dried completely or the prepared margin is placed subgingivally, accurate digital images cannot always be guaranteed. PURPOSE: The purpose of this in vitro study was to compare the internal and marginal discrepancies of zirconia copings fabricated directly using an intraoral scanner with those fabricated indirectly with impression scanning...
February 7, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29417717/influence-of-cleaning-methods-on-resin-bonding-to-saliva-contaminated-zirconia
#4
Keiichi Yoshida
OBJECTIVE: The aim of this study was to investigate the influence of different cleaning methods on the shear bond strengths of 2 resin cements to saliva-contaminated zirconia. METHODS: After saliva contamination, alumina-blasted zirconia specimens were cleaned with 1 of 5 methods of water-rinsing (SA), K-etchant GEL phosphoric acid (PA), Ivoclean (IC), AD Gel (ADG), or additional alumina-blasting (AB). Alumina-blasted zirconia without saliva contamination was used as control group (Cont)...
February 8, 2018: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29414474/effects-of-water-and-microbial-based-aging-on-the-performance-of-three-dental-restorative-materials
#5
Xinxuan Zhou, Suping Wang, Xian Peng, Yao Hu, Biao Ren, Mingyun Li, Liying Hao, Mingye Feng, Lei Cheng, Xuedong Zhou
The objective of this study was to evaluate the performance changes of three restorative materials before and after three different aging treatments: storage in distilled water, Streptococcus mutans (S. mutans) and oral salivary microbes suspensions for one month. Resin composite (RC), giomer and glass ionomer cement (GIC) were chosen for aging procedures. Surface morphology, roughness average (Ra), color changes and mechanical properties were all determined before and after aging respectively. Biomass and metabolism difference of early attached biofilm on the material surface were tested through 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and lactic acid measurement...
January 26, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29409675/features-of-fracture-of-prosthetic-tooth-endocrown-constructions-by-means-of-acoustic-emission-analysis
#6
Valentyn Skalskyi, Valentyn Makeev, Olena Stankevych, Roman Pavlychko
OBJECTIVE: The study aims at comparing the fracture resistance of different restorative materials used in dental endocrown restorations and respective endocrown restorations under a quasi-static compressive load using acoustic emission (AE) method. METHODS: Five restorative materials were used in this study. The restorative materials were manufactured into discs 13mm in diameter and 5mm thick, which were then divided into 5 groups and included into Type 1: Group B: zirconium dioxide (Prettau zirconia); Group C: ceramics (IPS e...
February 3, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29404813/impact-of-simulated-reduced-alveolar-bone-support-increased-tooth-mobility-and-distal-post-supported-root-treated-abutment-tooth-on-load-capability-of-all-ceramic-zirconia-supported-cantilever-fdp
#7
M Naumann, M von Stein-Lausnitz, M Rosentritt, C Walter, H Meyer-Lückel, G Sterzenbach
OBJECTIVES: The aim of this in vitro study was an analysis of the impact of simulated reduced alveolar bone support and post-restored, endodontically treated distal abutment tooth on load capability of all-ceramic zirconia-based cantilever-fixed dental prosthesis (CFDP). MATERIAL AND METHODS: The roots of human lower sound premolars (n = 80) were divided into five experimental groups to be restored with all-ceramic zirconia-supported three-unit CFDP regarding bone loss (BL) relative to the cement-enamel junction (CEJ): 2 mm below CEJ = 0% BL (control group), group 25% distal BL, group 50% distal BL, group 50% mesial and distal BL, and group 50% distal BL and adhesive post-supported restoration...
February 6, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29402539/predicting-refractive-index-of-fluoride-containing-glasses-for-aesthetic-dental-restorations
#8
Tomas Duminis, Saroash Shahid, Natalia G Karpukhina, Robert G Hill
OBJECTIVE: Dental restoration aesthetics, particularly the translucency of modern dental restorative filling materials depends on the refractive index (RI) match between the different components in the material. In the case of dental composites (DC), the RI of the polymer must match the RI of the filler otherwise the material is optically opaque and has limited depth of cure. In the case of glass ionomer cements (GICs), the RI of the ion-leachable glass must match the RI of the polysalts to engineer a smart material with a tooth-like appearance...
February 2, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29399950/a-literature-review-on-the-new-polymer-infiltrated-ceramic-network-material-picn
#9
REVIEW
Júlia Cadorim Facenda, Marcia Borba, Pedro Henrique Corazza
OBJECTIVES: Ceramics and composites are the most used materials for dental application. Recently, the characteristics of both were combined on the called "polymer-infiltrated ceramic-network" (PICN). The aim of this review is to report the behavior of PICN, comparing the findings that may support the correct clinical application. OVERVIEW: The PICN material is a structure with a sintered ceramic matrix infiltrated with a polymer matrix. Studies evaluated this material microstructure and composition, mechanical properties and adhesive behavior...
February 5, 2018: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29398087/interfacial-characteristics-and-cytocompatibility-of-hydraulic-sealer-cements
#10
Mira Kebudi Benezra, Pierre Schembri Wismayer, Josette Camilleri
INTRODUCTION: The stability and long-term success of root canal obturation depends on the choice of sealer because the sealer bonds to the dentin and stabilizes the solid cone. Furthermore, the sealer needs to be nontoxic because sealer toxicity will certainly lead to treatment failure. The aim of this study was to assess the sealer-dentin interface of 3 hydraulic root canal sealers and to evaluate their cytocompatibility compared with AH Plus (Dentsply DeTrey GmbH, Konstanz, Germany)...
February 2, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29395468/development-of-a-novel-dental-resin-cement-incorporating-fgf-2-loaded-polymer-particles-with-the-ability-to-promote-tissue-regeneration
#11
Ririko Tsuboi, Jun-Ichi Sasaki, Haruaki Kitagawa, Itsumi Yoshimoto, Fumio Takeshige, Satoshi Imazato
OBJECTIVE: Aiming to achieve bioactive dental resins that promote healing of surrounding tissues, we developed novel poly(2-hydroxyethyl methacrylate/trimethylolpropane trimethacrylate) (polyHEMA/TMPT) particles. These particles have been reported to be useful as a non-biodegradable carrier for fibroblast growth factor-2 (FGF-2) in vitro. The aim of this study was to evaluate the ability of an adhesive resin incorporating FGF-2-loaded polymer particles to promote tissue regeneration in vitro and in vivo...
January 29, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29394141/marginal-fit-and-retention-strength-of-zirconia-crowns-cemented-by-self-adhesive-resin-cements
#12
R Pilo, M Folkman, A Arieli, S Levartovsky
The absolute marginal gap (AMG) precementation and postcementation and the retention of zirconia crowns cemented to standardized molar preparations (4×10) by self-adhesive resin cements (SARCs) were evaluated. The following SARCs were used: RelyX U-200 (RXU200; 3M ESPE, Seefeld, Germany), SmartCem 2 (SC2; Dentsply, Milford, DE, USA), and G-Cem Automix (GCA; GC, Alsip, IL, USA). The control adhesive resin cement was Panavia 21 (PAN; Kuraray Dental Co Ltd, Osaka, Japan). Twenty measuring locations at a constant interval along the margins were marked, and the AMG was measured by an image analysis system connected to a stereomicroscope (20×)...
February 2, 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29388785/techniques-to-optimize-color-esthetics-bonding-and-peri-implant-tissue-health-with-titanium-implant-abutments
#13
Chandur P K Wadhwani, Todd Schoenbaum, Kirk E King, Kwok-Hung Chung
Due to their exceptional biological and mechanical properties, titanium and its alloys are commonly used in both dental implants and implant abutments, upon which prostheses can be attached. The gray color of titanium metal, however, can elicit esthetic problems, as it has the potential to show through a translucent ceramic restorative material. Various solutions have been proposed and used to attempt to overcome esthetic issues associated with titanium. This article describes a simple, economical technique to color titanium abutments and components utilizing anodization, resulting in light reflection and color enhancement through a natural physics phenomenon known as light interference patterns...
February 2018: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/29370163/in-vitro-effects-of-two-silicate-based-materials-biodentine-and-bioroot-rcs-on-dental-pulp-stem-cells-in-models-of-reactionary-and-reparative-dentinogenesis
#14
Ludwig Stanislas Loison-Robert, Mathilde Tassin, Eric Bonte, Tsouria Berbar, Juliane Isaac, Ariane Berdal, Stéphane Simon, Benjamin P J Fournier
BACKGROUND: Calcium silicate-based cements are biomaterials with calcium oxide and carbonate filler additives. Their properties are close to those of dentin, making them useful in restorative dentistry and endodontics. The aim of this study was to evaluate the in vitro biological effects of two such calcium silicate cements, Biodentine (BD) and Bioroot (BR), on dental stem cells in both direct and indirect contact models. The two models used aimed to mimic reparative dentin formation (direct contact) and reactionary dentin formation (indirect contact)...
2018: PloS One
https://www.readbyqxmd.com/read/29358537/radiographic-evaluation-of-post-core-restorations-fabricated-by-dental-students-at-jazan-university
#15
Abdullah A Meshni, Mohammed M Al Moaleem, Khurshid A Mattoo, Esam Halboub, Saleh Mh Alharisi, Ali E Shatifi, Saeed A Al Amriee, Nabiel Al Ghazali
AIM: Post and core procedures are important clinical methods in routine dental practice. The present research aimed to radiographically assess the quality of post seating performed by undergraduate students at the College of Dentistry, Jazan University. MATERIALS AND METHODS: A total of 343 periapical X-rays of cemented posts (170 from males and 173 from females) were assessed. The assessment covered tooth type, arch, gender, type of post, length of post in relation to the crown and root lengths, the presence of any abnormality in post space, status of the remaining gutta-percha (GP), and the presence or absence of spaces between the end of post and GP...
January 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29356913/effect-of-a-calcium-chloride-solution-treatment-on-physical-and-mechanical-properties-of-glass-ionomer-cements
#16
Dimitrios Dionysopoulos, Kosmas Tolidis, Dimitrios Tortopidis, Paris Gerasimou, Thrasyvoulos Sfeikos
This paper details a novel method to improve wear resistance of dental glass ionomer cement (GIC) restorations. The purpose of this in vitro study was to evaluate the effect of a calcium chloride (CaCl2) solution treatment on surface hardness, surface roughness, compressive strength, water sorption and solubility of three conventional glass ionomer cements (GICs). Additionally, the changes of the Ca composition and morphology of the surface of the tested GICs were also investigated. The experimental groups of the study were: Group 1 (control) specimens after mixing were left in the mold to set without any treatment for 5 min; Group 2 specimens were left in the mold to set for 5 min and then each specimen was immersed in 10 ml of 42...
January 22, 2018: Odontology
https://www.readbyqxmd.com/read/29355052/injectable-calcium-phosphate-scaffold-with-iron-oxide-nanoparticles-to-enhance-osteogenesis-via-dental-pulp-stem-cells
#17
Yang Xia, Huimin Chen, Feimin Zhang, Lin Wang, Bo Chen, Mark A Reynolds, Junqing Ma, Abraham Schneider, Ning Gu, Hockin H K Xu
Literature search revealed no systematic report on iron oxide nanoparticle-incorporating calcium phosphate cement scaffolds (IONP-CPC). The objectives of this study were to: (1) use γFe2O3 nanoparticles (γIONPs) and αFe2O3 nanoparticles (αIONPs) to develop novel IONP-CPC scaffolds, and (2) investigate human dental pulp stem cells (hDPSCs) seeding on IONP-CPC for bone tissue engineering for the first time. IONP-CPC scaffolds were fabricated. Physiochemical properties of IONP-CPC scaffolds were characterized...
January 21, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29351113/fatigue-failure-of-external-hexagon-connections-on-cemented-implant-supported-crowns
#18
João Malta Barbosa, Daniel Navarro da Rocha, Ronaldo Hirata, Gileade Freitas, Estevam A Bonfante, Paulo G Coelho
PURPOSE: To evaluate the probability of survival and failure modes of different external hexagon connection systems restored with anterior cement-retained single-unit crowns. The postulated null hypothesis was that there would be no differences under accelerated life testing. MATERIALS AND METHODS: Fifty-four external hexagon dental implants (∼4 mm diameter) were used for single cement-retained crown replacement and divided into 3 groups: (3i) Full OSSEOTITE, Biomet 3i (n = 18); (OL) OEX P4, Osseolife Implants (n = 18); and (IL) Unihex, Intra-Lock International (n = 18)...
January 17, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29342837/effect-of-exposed-surface-area-volume-and-environmental-ph-on-the-calcium-ion-release-of-three-commercially-available-tricalcium-silicate-based-dental-cements
#19
Sivaprakash Rajasekharan, Chris Vercruysse, Luc Martens, Ronald Verbeeck
Tricalcium silicate cements (TSC) are used in dental traumatology and endodontics for their bioactivity which is mostly attributed to formation of calcium hydroxide during TSC hydration and its subsequent release of calcium and hydroxide ions. The aim of this study was to determine the effect of volume (Vol), exposed surface area (ESA) and pH of surrounding medium on calcium ion release. Three commercially available hydraulic alkaline dental cements were mixed and condensed into cylindrical tubes of varying length and diameter (n = 6/group)...
January 13, 2018: Materials
https://www.readbyqxmd.com/read/29333766/-relationship-between-different-x-ray-appearances-and-oral-clinical-manifestations-of-cemental-dysplasia
#20
Wang Hu
Cemental dysplasia is a non-neoplastic lesion and features different X-ray appearances that easily confuse dentists. This condition is often observed in conventional dental films or occasionally on panoramic radiographs. Cemental dysplasia is easily misdiagnosed as chronic periapical periodontitis, osteomyelitis, and tumor. In this paper, clinical mani-festations, imaging diagnosis, and the correlation between these variables are analyzed to achieve correct diagnosis.
December 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
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