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https://www.readbyqxmd.com/read/29673430/hypobaric-conditions-and-retention-of-dental-crowns-luted-with-manually-or-automixed-dental-cements
#1
Andrej M Kielbassa, Johannes A G Müller
BACKGROUND: There is only scant information on the influence of the hypobaric environment on luting agents and their efficacy on dental crown cementation. The objective of this study was to provide data on the retentive characters of two cements commonly used on implant abutment surfaces both under normal and under hypobaric conditions. METHODS: There were 56 implant abutments supplied with CAD/CAM milled zirconia oxide crowns. 1) A zinc phosphate cement (ZP), and 2) a resin-modified glass ionomer cement (RMGI), each mixed either A) manually or B) by means of automix capsules, were used for cementation...
May 1, 2018: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/29670735/microleakage-of-porcelain-laminate-veneers-cemented-with-different-bonding-techniques
#2
Satheesh B Haralur
Background: Porcelain laminate veneers (PLV) are continued to be popular in modern dental practice due to its high aesthetic outcome and conservative tooth preparation. The composite resins are commonly used as luting agents for cementation of PLV. Polymerisation shrinkage induced marginal gap and interfacial leakage is the persistent limitation with the resin luting cements. The objective of the study was to assess the effect of various dentin bonding techniques on the microleakage after accelerated ageing in porcelain laminate veneres...
February 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29670732/analysis-of-sealing-ability-of-endodontic-cements-apical-plugs
#3
Bruna Cechella, Josiane de Almeida, Morgane Kuntze, Wilson Felippe
Background: It is unknown whether the bioactivity of Biodentine characterized by the precipitation of hydroxyapatite and formation of tags into the dentinal tubules improve its sealing ability as an apical plug. Aim: To evaluate the sealing ability provided by Biodentine and mineral trioxide aggregate (MTA) apical plugs, with or without phosphate-buffered saline (PBS) intracanal dressing, using a glucose leakage method. Material and Methods: The space of the canal of 100 root segments with about 12 mm long was shaped using Gates-Glidden...
February 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29663972/a-multidisciplinary-approach-to-restore-an-unconventional-crown-removal-of-traumatized-permanent-central-incisors
#4
Richard E Campbell, Heather T Morris, Kyle T Reynolds, Elizabeth S Gosnell
A 13-year-old female presented with traumatized maxillary central incisors that had been endodontically treated. Five years later, at a different dental office, she had the clinical crowns removed, leaving subgingival margins. From the patient's history and our initial assessment, it seemed as if the teeth had been fractured and luxated but not avulsed. Endodontic posts with spot-welded orthodontic brackets were temporarily cemented to enable orthodontic extrusion. Once access to restorable margins was obtained, the temporary posts were removed and conventional fiber posts with interim composite crowns were placed...
January 15, 2018: Journal of Dentistry for Children
https://www.readbyqxmd.com/read/29663915/microleakage-of-cements-in-prefabricated-zirconia-crowns
#5
Paula Stepp, Brian R Morrow, Martha Wells, David A Tipton, Franklin Garcia-Godoy
PURPOSE: The purpose of this study was to investigate and compare microleakage of prefabricated posterior NuSmile® ZR and EZCrowns when cemented with BioCem and Ketac Cem dental cements. METHODS: Forty extracted permanent teeth (n equals 10 per group) were fitted for either NuSmile or EZCrowns prefabricated posterior zirconia crowns and cemented with BioCem or Ketac Cem, for a total of four groups. Crowned teeth were placed in Dulbecco's Phosphate Buffered Saline solution at 37 degrees Celsius for 24 hours...
March 15, 2018: Pediatric Dentistry
https://www.readbyqxmd.com/read/29650250/thermo-setting-glass-ionomer-cements-promote-variable-biological-responses-of-human-dental-pulp-stem-cells
#6
Mar Collado-González, Miguel R Pecci-Lloret, Christopher J Tomás-Catalá, David García-Bernal, Ricardo E Oñate-Sánchez, Carmen Llena, Leopoldo Forner, Vinicius Rosa, Francisco J Rodríguez-Lozano
OBJECTIVE: To evaluate the in vitro cytotoxicity of Equia Forte (GC, Tokyo, Japan) and Ionostar Molar (Voco, Cuxhaven, Germany) on human dental pulp stem cells (hDPSCs). METHODS: hDPSCs isolated from third molars were exposed to several dilutions of Equia Forte and Ionostar Molar eluates (1/1, 1/2 and 1/4). These eluates were obtained by storing material samples in respective cell culture medium for 24h (n=40). hDPSCs in basal growth culture medium were the control...
April 9, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29629322/oral-pathology-in-forensic-investigation
#7
REVIEW
Thorakkal Shamim
Forensic odontology is the subdiscipline of dentistry which analyses dental evidence in the interest of justice. Oral pathology is the subdiscipline of dentistry that deals with the pathology affecting the oral and maxillofacial regions. This subdiscipline is utilized for identification through oral and maxillofacial pathologies with associated syndromes, enamel rod patterns, sex determination using exfoliative cytology, identification from occlusal morphology of teeth, and deoxyribonucleic acid profiling from teeth...
January 2018: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29628646/antibacterial-activity-of-dental-restorative-material-an-in-vitro-study
#8
Nishmitha N Hegde, Shruthi H Attavar, Mithra N Hegde, G Priya
Aim: The study evaluated the antibacterial effects of dental restorations such as nano-hybrid composite (Empress), a glass ionomer cement (GIC Gold label Type 9) and silver amalgam against Streptococcus mutans . Materials and Methods: A modified bacterial suspension within the material assay was used to study the antibacterial effects. A volume of 20 μl of bacterial suspensions were placed in a narrow conical cavity within the materials. They were incubated for 0, 3, 6, 12, 24, and 48 h at 37°C...
January 2018: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29610618/effect-of-luting-cements-on-the-bond-strength-to-turkom-cera-all-ceramic-material
#9
Bandar M A Al-Makramani, Abdul A A Razak, Mohamed I Abu-Hassan, Fuad A Al-Sanabani, Fahad M Albakri
BACKGROUND: The selection of the appropriate luting cement is a key factor for achieving a strong bond between prepared teeth and dental restorations. AIM: To evaluate the shear bond strength of Zinc phosphate cement Elite, glass ionomer cement Fuji I, resin-modified glass ionomer cement Fuji Plus and resin luting cement Panavia-F to Turkom-Cera all-ceramic material. MATERIALS AND METHODS: Turkom-Cera was used to form discs 10mm in diameter and 3 mm in thickness (n = 40)...
March 15, 2018: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29603022/cytotoxic-effects-to-mouse-and-human-gingival-fibroblasts-of-a-nanohybrid-ormocer-versus-dimethacrylate-based-composites
#10
Andrea Schubert, Christopher Ziegler, Andrea Bernhard, Ralf Bürgers, Nicolai Miosge
OBJECTIVES: Tooth-colored composites have emerged as a standard restorative material in caries therapy and have largely replaced materials such as silver amalgam or glass ionomer cements. In addition to their superior esthetics and desirable mechanical properties, composites also comprise negative characteristics, such as wear, shrinkage, and an adverse biocompatibility. Modifications of classic resin-based dental composites have been developed to overcome these shortcomings. For example, ormocers are innovative inorganic-organic hybrid polymers that form a siloxane network modified by the incorporation of organic groups...
March 30, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29576580/in-vitro-cytotoxic-evaluation-of-novel-fast-setting-calcium-silicate-cement-compositions-and-dental-materials-using-colorimetric-methyl-thiazolyl-tetrazolium-assay
#11
Bahram Ranjkesh, Flemming Isidor, David Christian Evar Kraft, Henrik Løvschall
A novel fast-setting calcium silicate cement with fluoride (CSC) has been developed for potential application in tooth crowns. This study compared the cytotoxicity of CSC compositions and a variety of dental materials. We tested CSC compositions (Protooth), MTA, Biodentine, Ketac Molar, Fuji II LC, Vitrebond, DeTrey Zinc, Dycal, and IRM, DMEM (negative control) and 1% NaOCl (positive control). After setting of cements for 24 h, specimens were immersed in DMEM for 24 h to obtain material elutes. The elutes were serially diluted in serum-free DMEM to obtain three dilutions...
2018: Journal of Oral Science
https://www.readbyqxmd.com/read/29576578/release-of-antimicrobial-compounds-from-a-zinc-oxide-chelate-cement
#12
Tamer Tüzüner, Zeynep A Güçlü, Andrew Hurt, Nichola J Coleman, John W Nicholson
This study examined the release of cetylpyridinium chloride and benzalkonium chloride from fatty acid chelate temporary dental cement and their antimicrobial effects. The cement was Cavex Temporary, and either cetylpyridinium chloride or benzalkonium chloride was added (1% or 5% by mass), incorporating into the base paste. Release of the additives was determined by reverse-phase high-performance liquid chromatography. Possible chemical interactions between the cement components and additives were examined by Fourier transform infrared (FTIR) spectroscopy...
2018: Journal of Oral Science
https://www.readbyqxmd.com/read/29575555/in-vitro-and-in-vivo-effects-of-a-novel-bioactive-glass-based-cement-used-as-a-direct-pulp-capping-agent
#13
Kaori Hanada, Takahiko Morotomi, Ayako Washio, Naomi Yada, Kou Matsuo, Hiroki Teshima, Kazuyoshi Yokota, Chiaki Kitamura
Direct pulp capping is an important procedure for preserving pulp viability. The pulp capping agent must possess several properties, including usability, biocompatibility, and the ability to induce reparative dentin formation. In this study, a novel bioactive glass-based cement was examined to determine whether the cement has the necessary properties to act as a direct pulp capping agent. Physicochemical properties of the bioactive glass-based cement and in vitro effects of the cement on odontoblast-like cells, as well as in vivo effects on the exposed dental pulp, were analyzed...
March 25, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29570021/effect-of-resin-modified-glass-ionomer-cement-dispensing-mixing-methods-on-mechanical-properties
#14
T A Sulaiman, A A Abdulmajeed, A Altitinchi, S N Ahmed, T E Donovan
STATEMENT OF THE PROBLEM: Resin-modified glass ionomer cements (RMGIs) are often used for luting indirect restorations. Hand-mixing traditional cements demands significant time and may be technique sensitive. Efforts have been made by manufacturers to introduce the same cement using different dispensing/mixing methods. It is not known what effects these changes may have on the mechanical properties of the dental cement. PURPOSE: The purpose of this study was to evaluate the mechanical properties (diametral tensile strength [DTS], compressive strength [CS], and fracture toughness [FT]) of RMGIs with different dispensing/mixing systems...
March 23, 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29570019/effect-of-various-bleaching-agents-on-the-surface-composition-and-bond-strength-of-a-calcium-silicate-based-cement
#15
S Kucukkaya Eren, H Aksel, O Uyanık, E Nagas
This study aimed to evaluate the morphological and elemental changes that occur on the surface of calcium silicate-based cement (CSC) and to analyze the bond strength of composite resin to CSC after application of various bleaching agents. One hundred twenty-five CSC blocks (Biodentine) were prepared and randomly divided into five groups according to the bleaching agent applied over the material surface (n=25): SP-DW (sodium perborate-distilled water mixture), SP-HP (sodium perborate-3% hydrogen peroxide [H2 O2 ] mixture), CP (37% carbamide peroxide gel), HP (35% H2 O2 gel), and a control group (no bleaching agent)...
March 23, 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29569451/a-comparative-assessment-of-changes-in-dental-arches-associated-with-different-activation-protocols-of-rapid-maxillary-expansion
#16
A Baldini, A Nota, C Santariello, V Assi, F Ballanti, P Cozza
AIM: The aim of this study is to compare dental arch changes associated with different activation protocols of maxillary expander. MATERIALS AND METHODS: A sample of 101 subjects with constricted maxillary arches (49 males and 52 females; mean age 10.96 ± 1.91 years) was enrolled in the study. All subjects underwent RME with a stainless steel banded expander cemented to the maxillary first molars and the expansion screw was randomly activated with two different rapid maxillary expansion protocols (one- quarter per day or two quarters per day)...
March 2018: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/29567317/improvement-of-the-mechanical-tribological-and-antibacterial-properties-of-glass-ionomer-cements-by-fluorinated-graphene
#17
Li Sun, Zhuanjun Yan, Youxin Duan, Junyan Zhang, Bin Liu
OBJECTIVE: The aim of this study was to improve the mechanical properties, wear resistance and antibacterial properties of conventional glass ionomer cements (GICs) by fluorinated graphene (FG), under the premise of not influencing their solubility and fluoride ion releasing property. MATERIALS AND METHODS: FG with bright white color was prepared using graphene oxide by a hydrothermal reaction. Experimental modified GICs was prepared by adding FG to the traditional GICs powder with four different weight ratios (0...
March 19, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29563434/nanoclay-reinforced-glass-ionomer-cements-in-vitro-wear-evaluation-and-comparison-by-two-wear-test-methods
#18
Muhammad A Fareed, Artemis Stamboulis
Glass ionomer cement (GIC) represents a major transformation in restorative dentistry. Wear of dental restoratives is a common phenomenon and the determination of the wear resistance of direct-restorative materials is a challenging task. The aim of this paper was to evaluate the wear resistance of novel glass ionomer cement by two wear-test methods and to compare the two wear methods.The wear resistance of a conventional glass ionomer cement (HiFi Advanced Health Care Kent, UK) and cements modified by including various percentages of nanoclays (1, 2 and 4 wt %) was measured by a reciprocating wear test (ball-on-flat) and Oregon Health and Sciences University's (OHSU) wear simulator...
October 19, 2017: Dentistry journal
https://www.readbyqxmd.com/read/29563361/dental-implant-treatment-with-computer-assisted-surgery-for-bilateral-agenesis-of-maxillary-lateral-incisors-a-case-report
#19
Hodaka Sasaki, Tomoki Hirano, Syuntaro Nomoto, Yasushi Nishii, Yasutomo Yajima
Here, we report a case of dental implant treatment involving computer-assisted surgery for bilateral agenesis of the maxillary lateral incisors. The patient was a 39-year-old woman with the chief complaint of functional and esthetic disturbance due to maxillary and mandibular malocclusion. The treatment plan comprised non-extraction comprehensive orthodontic treatment and prosthodontic treatment for space due to the absence of bilateral maxillary lateral incisors. A preliminary examination revealed that the mesiodistal spaces left by the absent bilateral maxillary lateral incisors were too narrow for implant placement (right, 5...
2018: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/29557400/posterior-atrophic-jaws-rehabilitated-with-prostheses-supported-by-5-%C3%A3-5-mm-implants-with-a-nanostructured-calcium-incorporated-titanium-surface-or-by-longer-implants-in-augmented-bone-3-year-results-from-a-randomised-controlled-trial
#20
Giorgio Gastaldi, Pietro Felice, Valeria Pistilli, Carlo Barausse, Daniela Rita Ippolito, Marco Esposito
PURPOSE: To evaluate whether 5.0 × 5.0 mm dental implants with a novel nanostructured calcium-incorporated titanium surface could be an alternative to implants of at least 10.0 mm long placed in bone augmented with bone substitutes in posterior atrophic jaws. MATERIALS AND METHODS: Forty patients with atrophic posterior (premolar and molar areas) mandibles with 5.0 mm to 7.0 mm bone height above the mandibular canal, and 40 patients with atrophic maxillas with 4...
2018: European Journal of Oral Implantology
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