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Odontology

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https://www.readbyqxmd.com/read/28197773/change-in-tongue-pressure-in-patients-with-head-and-neck-cancer-after-surgical-resection
#1
Yoko Hasegawa, Kazuma Sugahara, Tatsuyuki Fukuoka, Shota Saito, Ayumi Sakuramoto, Nobuhide Horii, Saori Sano, Kana Hasegawa, Yuta Nakao, Tomoki Nanto, Kanenori Kadoi, Kuniyasu Moridera, Kazuma Noguchi, Kazuhisa Domen, Hiromitsu Kishimoto
Tongue pressure is reportedly associated with dysphagia. This study investigated relationships among characteristics of head and neck cancer, tongue pressure and dysphagia screening tests performed in patients with head and neck cancer during the acute phase after surgical resection. Fifty-seven patients (36 men, 21 women; age range 26-95 years) underwent surgical resection and dysphagia screening tests (Repetitive Saliva Swallowing Test, Water Swallowing Test, Modified Water Swallowing Test and Food Test) and pre- and postoperative measurement of tongue pressure at 5 time points (preoperatively, and 1-2 weeks and 1, 2, and 3 months postoperatively)...
February 14, 2017: Odontology
https://www.readbyqxmd.com/read/28194543/a-comparative-study-of-the-bone-contact-to-zirconium-and-titanium-implants-after-8%C3%A2-weeks-of-implantation-in-rabbit-femoral-condyles
#2
Abdullah Aldosari AlFarraj, Anil Sukumaran, D Mohammad Amri Al, Aja Bart Van Oirschot, John A Jansen
Zirconium (Zr) has been found to have comparable characteristics to titanium with a favorable modulus of elasticity. In addition, the release of Zr-ions of a Zr implant is supposed to further increase the bone-to-implant response. Therefore, the objective of this study is to compare the bone contact to Zr and Ti implants in the femoral trabecular bone of rabbits. In addition, implants provided with a hydroxyapatite (HA) coating were included, as such a coating was proven before to enhance the secondary implant stability...
February 13, 2017: Odontology
https://www.readbyqxmd.com/read/28160094/marginal-adaptation-and-microleakage-of-a-bulk-fill-composite-resin-photopolymerized-with-different-techniques
#3
Vania Stephanie Sánchez Gamarra, Gilberto Antonio Borges, Luiz Henrique Burnett Júnior, Ana Maria Spohr
The purpose of this study was to investigate the marginal adaptation and microleakage of SonicFill composite with different photopolymerization techniques. Class II cavities were prepared in 40 premolars and divided into groups according to the photopolymerization technique (n = 10): G1:1200 mW/cm(2) for 20 s; G2:1200 mW/cm(2) for 40 s; G3:Soft-start with 650 mW/cm(2) for 5 s and 1200 mW/cm(2) for 15 s; G4:Soft-start with 650 mW/cm(2) for 10 s and 1200 mW/cm(2) for 30 s. The cavities were restored with OptiBond FL adhesive and SonicFill...
February 3, 2017: Odontology
https://www.readbyqxmd.com/read/28150182/changes-in-mandibular-movement-during-chewing-of-different-hardness-foods
#4
Marie Komino, Hiroshi Shiga
In order to clarify the change in mandibular movement during chewing of foods with different hardness, 20 healthy subjects were asked to chew 3 types of gummy jellies (containing 6, 8, and 10% gelatin), and the masseter muscular activity and the mandibular movement were recorded. The indicators representing the muscular activity (integral value of masseter muscular activity), the mandibular movement (opening distance, masticatory width, cycle time, opening maximum velocity and closing maximum velocity), and the stability of masticatory movement were calculated, respectively, and compared among the three foods...
February 1, 2017: Odontology
https://www.readbyqxmd.com/read/28120171/shear-bond-strengths-of-tooth-coating-materials-including-the-experimental-materials-contained-various-amounts-of-multi-ion-releasing-fillers-and-their-effects-for-preventing-dentin-demineralization
#5
Shoko Arita, Masaya Suzuki, Miku Kazama-Koide, Koichi Shinkai
We examined shear bond strengths (SBSs) of various tooth-coating-materials including the experimental materials to dentin and demineralization resistance of a fractured adhesive surface after the SBS testing. Three resin-type tooth-coating-materials (BC, PRG Barrier Coat; HC, Hybrid Coat II; and SF, Shield force plus) and two glass-ionomer-type tooth-coating-materials (CV, Clinpro XT Varnish; and FJ, Fuji VII) were selected. The experimental PRG Barrier Coat containing 0, 17, and 33 wt% S-PRG filler (BC0, BC17, and BC33, respectively) were developed...
January 24, 2017: Odontology
https://www.readbyqxmd.com/read/28074386/the-effect-of-ceramic-thickness-and-resin-cement-shades-on-the-color-matching-of-ceramic-veneers-in-discolored-teeth
#6
Wenzhong Xing, Xiaodong Chen, Dafei Ren, Kangru Zhan, Yining Wang
The objective of this study was to analyze the effects of ceramic material thickness and resin cement shade on the color matching of ceramic veneers at the gray tooth structures. Seventy-two artificial maxillary right central incisor teeth (C2 shade) were prepared according to veneer tooth preparation in practice. Ceramic materials (LT, A2 shade, IPS e.max Press) were selected to fabricate the 0.50- and 0.75-mm thick veneers at the body region. The ceramic veneer specimens were bonded to the artificial teeth by the 6 shades of resin cements (Variolink Veneer: shades of HV+3, LV-2, LV-3; and RelyX(TM) Veneer: shades of WO, TR, A3)...
January 10, 2017: Odontology
https://www.readbyqxmd.com/read/28070702/effects-of-tributylborane-activated-adhesive-and-two-silane-agents-on-bonding-computer-aided-design-and-manufacturing-cad-cam-resin-composite
#7
Ayano Shinohara, Yohsuke Taira, Takashi Sawase
The present study was conducted to evaluate the effects of an experimental adhesive agent [methyl methacrylate-tributylborane liquid (MT)] and two adhesive agents containing silane on the bonding between a resin composite block of a computer-aided design and manufacturing (CAD/CAM) system and a light-curing resin composite veneering material. The surfaces of CAD/CAM resin composite specimens were ground with silicon-carbide paper, treated with phosphoric acid, and then primed with either one of the two silane agents [Scotchbond Universal Adhesive (SC) and GC Ceramic Primer II (GC)], no adhesive control (Cont), or one of three combinations (MT/SC, MT/GC, and MT/Cont)...
January 9, 2017: Odontology
https://www.readbyqxmd.com/read/28070701/use-of-a-continual-sweep-motion-to-compare-air-polishing-devices-powders-and-exposure-time-on-unexposed-root-cementum
#8
Mandy L Herr, Ralph DeLong, Yuping Li, Scott A Lunos, Jill L Stoltenberg
Low abrasive air polishing powders are a viable method for subgingival biofilm removal. This in vitro study evaluated the effects of air polishing using a standard tip on cementum following clinically recommended protocols. Forty-eight teeth were randomly divided into eight groups with six teeth per group. Teeth were treated using either a Hu-Friedy EMS or DENTSPLY Cavitron(®) air polishing device. One of three glycine powders (Air-flow 25 µm, Clinpro 45 μm, Clinpro+TCP 45 μm) or a sodium bicarbonate powder (NaHCO3  85 μm) was sprayed on cementum using a clinically relevant sweeping motion...
January 9, 2017: Odontology
https://www.readbyqxmd.com/read/28058515/relationship-between-tongue-strength-and-1-year-life-expectancy-in-elderly-people-needing-nursing-care
#9
Yuri Yajima, Takeshi Kikutani, Fumiyo Tamura, Mitsuyoshi Yoshida
Tongue strength is a useful indicator of oral function and has been found to decrease with aging and reduced physical functioning. The present study aimed to assess the relationships of tongue strength with physical function, mental function, and nutritional status, and also between these factors and 1-year outcomes, to determine whether tongue strength is related to life expectancy in elderly people needing nursing care. The subjects were 140 elderly individuals requiring needing nursing care (49 men and 91 women; ≥65 years)...
January 5, 2017: Odontology
https://www.readbyqxmd.com/read/27913930/letter-to-the-editor-enigmatic-morphological-traits-in-human-teeth-from-early-bronze-age
#10
LETTER
Iztok Štamfelj
No abstract text is available yet for this article.
December 2, 2016: Odontology
https://www.readbyqxmd.com/read/27888369/prevalence-of-periodontal-pathogens-as-predictor-of-the-evolution-of-periodontal-status
#11
Miriam Puig-Silla, José María Montiel-Company, Francisco Dasí-Fernández, José Manuel Almerich-Silla
The aim of this study was to determine the relationship between the prevalence of Porphyromonas gingivalis, its fimA genotypes, Aggregatibacter actinomycetemcomitans, Tannerella forsythia, and Treponema denticola and the evolution of periodontal health. In a longitudinal prospective study, samples of subgingival plaque were taken from 114 patients (37 with chronic periodontitis, 17 with gingivitis, and 60 periodontally healthy) in the course of a full periodontal examination. PCR was employed to determine the presence of the periodontopathogenic bacteria...
November 25, 2016: Odontology
https://www.readbyqxmd.com/read/27878641/dental-arch-spatial-changes-after-premature-loss-of-first-primary-molars-a-systematic-review-of-controlled-studies
#12
Eleftherios G Kaklamanos, Dimitra Lazaridou, Dimitra Tsiantou, Nikolaos Kotsanos, Athanasios E Athanasiou
Studies investigating dental arch spatial changes following first primary molar premature loss are controversial regarding clinical significance. The purpose of this review was to systematically investigate the relevant literature. Controlled studies investigating changes before and after premature loss of first primary molars were searched in various databases. Split-mouth design studies were considered eligible for inclusion. The risk of bias was judged according to ADA Clinical Practice Guidelines. Only two analyzable split-mouth studies on mandibular first primary molar loss were identified...
November 23, 2016: Odontology
https://www.readbyqxmd.com/read/27933414/re-enigmatic-morphological-traits-in-human-teeth-from-early-bronze-age
#13
LETTER
Agnieszka Przystańska, Mariusz Glapiński, Tomasz Kulczyk
No abstract text is available yet for this article.
January 2017: Odontology
https://www.readbyqxmd.com/read/27853978/sex-differences-of-dental-pathology-in-early-modern-samurai-and-commoners-at-kokura-in-japan
#14
Joichi Oyamada, Yoshikazu Kitagawa, Masahito Hara, Junya Sakamoto, Takayuki Matsushita, Toshiyuki Tsurumoto, Yoshitaka Manabe
So-called "Ohaguro", teeth blackening, in the married females was a general custom regardless of class in the early modern period. As a result, Ohaguro was thought to have enhanced the acid resistance of tooth substance and tightened gingiva and prevented tooth morbidity due to periodontal disease. For investigation into the influence of Ohaguro, the skeletal remains of early modern samurai and commoners at Kokura were examined for differences in the dental pathology based on sex. Though females from archeological sites have significantly more carious teeth and antemortem tooth loss (AMTL) than males in the previous studies, the prevalence of caries and AMTL in males was higher than in females among the early modern samurai and commoners in Kokura...
November 16, 2016: Odontology
https://www.readbyqxmd.com/read/27848100/stress-distribution-difference-between-lava-ultimate-full-crowns-and-ips-e-max-cad-full-crowns-on-a-natural-tooth-and-on-tooth-shaped-implant-abutments
#15
Ivo Krejci, René Daher
The goal of this short communication is to present finite element analysis comparison of the stress distribution between CAD/CAM full crowns made of Lava Ultimate and of IPS e.max CAD, adhesively luted to natural teeth and to implant abutments with the shape of natural teeth. Six 3D models were prepared using a 3D content-creating software, based on a micro-CT scan of a human mandibular molar. The geometry of the full crown and of the abutment was the same for all models representing Lava Ultimate full crowns (L) and IPS e...
November 15, 2016: Odontology
https://www.readbyqxmd.com/read/27848099/dental-pulp-tissue-engineering-of-pulpotomized-rat-molars-with-bone-marrow-mesenchymal-stem-cells
#16
Takafumi Ito, Tomoatsu Kaneko, Yukiko Sueyama, Reika Kaneko, Takashi Okiji
The major goal of dental pulp tissue engineering is to enable the healing of inflamed tissue or to replace necrotic pulp tissue with newly formed dental pulp tissue. Here, we report a protocol for pulp tissue engineering in vivo in pulpotomized rat teeth using constructs of rat bone marrow mesenchymal stem cells, preformed biodegradable scaffolds, and hydrogel. The constructs were implanted into pulpotomized pulp chambers for 3, 7, or 14 days. At 3 days, cells were located mainly along the preformed scaffolds...
November 15, 2016: Odontology
https://www.readbyqxmd.com/read/27807653/localization-and-expression-pattern-of-amelotin-odontogenic-ameloblast-associated-protein-and-follicular-dendritic-cell-secreted-protein-in-the-junctional-epithelium-of-inflamed-gingiva
#17
Yohei Nakayama, Ryoki Kobayashi, Sari Matsui, Hiroyoshi Matsumura, Yasunobu Iwai, Keisuke Noda, Mizuho Yamazaki, Tomoko Kurita-Ochiai, Atsutoshi Yoshimura, Tamayuki Shinomura, Bernhard Ganss, Yorimasa Ogata
The purpose of this study is to elucidate the localization of amelotin (AMTN), odontogenic ameloblast-associated protein (ODAM) and follicular dendritic cell-secreted protein (FDC-SP) at the junctional epithelium (JE) in Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans infected mice and inflamed and non-inflamed human gingiva. We performed immunostaining to determine the localization and expression pattern of AMTN, ODAM and FDC-SP. AMTN, ODAM and FDC-SP in A. actinomycetemcomitans infected mice did not change dramatically compared with non-infected mice...
November 2, 2016: Odontology
https://www.readbyqxmd.com/read/27803985/marginal-integrity-of-low-shrinking-versus-methacrylate-based-composite-effect-of-different-one-step-self-etch-adhesives
#18
Ladislav Gregor, Lefever Dorien, Tissiana Bortolotto, Albert J Feilzer, Ivo Krejci
The aim of the study was to evaluate the influence of composite type and adhesive system on the quality of marginal adaptation in standardized Class V cavities before and after thermo-mechanical loading (TML). The cavities were restored using different combinations of three adhesive systems [(Silorane System Adhesive (SSA), Clearfil S(3) Bond (S3), G-Bond (G-B)] and two resin composite materials (Filtek Silorane, Clearfil AP-X). Six groups (n = 10): Group A (SSA-Primer + SSA-Bond, Filtek Silorane), Group B (SSA-Primer + SSA-Bond, Clearfil AP-X), Group C (S3 + SSA-Bond, Filtek Silorane), Group D (S3 + SSA-Bond, Clearfil AP-X), Group E (G-B + SSA-Bond, Filtek Silorane) and Group F (G-B + SSA-Bond, Clearfil AP-X) were defined...
November 1, 2016: Odontology
https://www.readbyqxmd.com/read/27796598/soft-tissue-changes-after-a-mandibular-osteotomy-for-symmetric-skeletal-class-iii-malocclusion
#19
Seigo Ohba, Haruka Kohara, Takamitsu Koga, Takako Kawasaki, Kei-Ichirou Miura, Noriaki Yoshida, Izumi Asahina
The soft tissue profile is crucial to esthetics after orthognathic surgery. The aim of this study was to assess the soft tissue changes of the subnasal and submental regions more than 1 year after a sagittal split ramus osteotomy (SSRO) in patients with skeletal class III malocclusion. A total of 22 patients with mandibular prognathism were included in this study. Patients had lateral cephalograms before and more than 1 year after they underwent an isolated SSRO. Soft and hard tissue changes were assessed using the lateral cephalograms...
October 31, 2016: Odontology
https://www.readbyqxmd.com/read/27778135/effect-of-adhesive-system-application-for-cavities-prepared-with-erbium-chromium-yttrium-scandium-gallium-garnet-laser-on-rat-dental-pulp-tissue
#20
Mayo Takada, Masaya Suzuki, Maiko Haga-Tsujimura, Koichi Shinkai
We examined the effects of adhesive systems under study applied for a laser-cut cavity using an Er,Cr:YSGG laser on rat dental pulp at 24 h and 14 days postoperatively. Group 1, laser-cut cavities were treated with a self-etching-primer and bonding agent; group 2, pretreated with a phosphoric-acid, and then treated with a self-etching-primer and bonding agent; group 3, pretreated with a phosphoric-acid and sodium-hypochlorite, and then treated with a self-etching-primer and bonding agent; and group 4, treated with an all-in-one adhesive...
October 24, 2016: Odontology
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