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Dentistry Medical and Health News Headlines
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All Recent Dentistry Medical News Headlines |
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Pay Freeze Will Undermine Confidence In NHS Dentistry, Says GDPC Chair
The confidence of general dental practitioners will be undermined by today's announcement of a 0.9 per cent uplift on contract values and a requirement to make efficiency savings in order to offset increases in expenses. That's the verdict of Dr John Milne, Chair of the British Dental Association's General Dental Practice Committee, on what is effectively a freeze on dentists' pay... (Source: Dentistry News From Medical News Today)...
POSTED 03/11/2010 at 04:00 AM --
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Dentists Ask For Review Of Decontamination In Practices In Scotland
The British Dental Association (BDA) has written to the Scottish Intercollegiate Guidelines Network (SIGN) to request the development of a guideline on dental instrument decontamination... (Source: Dentistry News From Medical News Today)...
POSTED 03/11/2010 at 04:00 AM --
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British Dental Association Disappointed At 2010-11 Funding Award
The British Dental Association (BDA) has expressed disappointment at today's announcement of the pay uplift for dentists for 2010/11. The Department of Health has announced that salaried dentists have been awarded a one per cent increase, while general dental practitioners have been awarded an increase that, after efficiency savings have been taken account of, is designed to produce a 0... (Source: Dentistry News From Medical News Today)...
POSTED 03/11/2010 at 04:00 AM --
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2010 Max Planck Research Award For NYU Dental Professor Dr. Timothy Bromage
New York University College of Dentistry's Dr. Timothy Bromage has been selected to receive the 2010 Max Planck Research Award. Dr. Bromage will collaborate with Dr... (Source: Dentistry News From Medical News Today)...
POSTED 03/11/2010 at 02:00 AM --
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Diagnostic delay is not associated with advanced-stage oro-pharyngeal cancer
(Source: European Journal of Oral Sciences)...
POSTED 03/10/2010 at 06:00 PM --
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Thermal/mechanical simulation and laboratory fatigue testing of an alternative yttria tetragonal zirconia polycrystal core-veneer all-ceramic layered crown design
This study evaluated the stress levels at the core layer and the veneer layer of zirconia crowns (comprising an alternative core design vs. a standard core design) under mechanical/thermal simulation, and subjected simulated models to laboratory mouth-motion fatigue. The dimensions of a mandibular first molar were imported into computer-aided design (CAD) software and a tooth preparation was modeled. A crown was designed using the space between the original tooth and the prepared tooth. The alternative core presented an additional lingual shoulder that lowered the veneer bulk of the cusps. Finite element analyses evaluated the residual maximum principal stresses fields at the core and veneer of both designs under loading and when cooled from 900°C to 25°C. Crowns were fabricated and mout......
POSTED 03/10/2010 at 06:00 PM --
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Flexural strength of glass fibre-reinforced posts bonded to dual-cure composite resin cements
Davis P, Melo LSD, Foxton RM, Sherriff M, Pilecki P, Mannocci F, Watson TF. Flexural strength of glass fibre-reinforced posts bonded to dual-cure composite resin cements. Eur J Oral Sci 2010; 118: 197[ndash]201. © 2010 The Authors. Journal compilation © 2010 Eur J Oral Sci The aims of this study were to evaluate the flexural strength of two different types of glass fibre-reinforced posts bonded to dual-cure composite resin cements. Forty glass methacrylate-based fibre posts (GC Fiber Post) and 20 glass fibre inter-polymerizing network posts (everStick POST) were divided into three groups. Group 1 contained 20 GC posts that were bonded to a dual-cure composite cement (UnifilCore). Group 2 contained 20 Stick Tech posts that had adhesive applied (Scotchbond Multipurpose resin) and were bond......
POSTED 03/10/2010 at 06:00 PM --
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Enamel microhardness and bond strengths of self-etching primer adhesives
Adebayo OA, Burrow MF, Tyas MJ, Adams GG, Collins ML. Enamel microhardness and bond strengths of self-etching primer adhesives. Eur J Oral Sci 2010; 118: 191[ndash]196. © 2010 The Authors. Journal compilation © 2010 Eur J Oral Sci The aim of this study was to determine the relationship between enamel surface microhardness and microshear bond strength ([mu]SBS). Buccal and lingual mid-coronal enamel sections were prepared from 22 permanent human molars and divided into two groups, each comprising the buccal and lingual enamel from 11 teeth, to analyze two self-etching primer adhesives (Clearfil SE Bond and Tokuyama Bond Force). One-half of each enamel surface was tested using the Vickers hardness test with 10 indentations at 1 N and a 15-s dwell time. A hybrid resin composite was bonded t......
POSTED 03/10/2010 at 06:00 PM --
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Energy transfer, volumetric expansion, and removal of oral biofilms by non-contact brushing
Busscher HJ, Jager D, Finger G, Schaefer N, van der Mei HC. Energy transfer, volumetric expansion, and removal of oral biofilms by non-contact brushing. Eur J Oral Sci 2010; 118: 177[ndash]182. © 2010 The Authors. Journal compilation © 2010 Eur J Oral Sci Non-contact removal of oral biofilms offers advantages beyond the reach of bristles, but it is unknown how energy transfer for removal from brush-to-biofilm occurs. In the present study we evaluated non-contact, oral biofilm removal by oscillating-rotating and sonic toothbrushes, and their acoustic output up to 6 mm distance. Whereas some brushes removed biofilm when used at a distance of up to 6 mm, others lost efficacy at a distance of 2[ndash]4 mm from the biofilm. Loss of efficacy was accompanied with high standard deviations and vo......
POSTED 03/10/2010 at 06:00 PM --
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Induction of invasion in an organotypic oral cancer model by CoCl2, a hypoxia mimetic
Brusevold IJ, Husvik C, Schreurs O, Schenck K, Bryne M, Søland TM. Induction of invasion in an organotypic oral cancer model by CoCl2, a hypoxia mimetic. Eur J Oral Sci 2010; 118: 168[ndash]176. © 2010 The Authors. Journal compilation © 2010 Eur J Oral Sci Invasion is a hallmark of malignancy. The aim of this study was to develop an in vitro model that can be used for experimental studies of cancer cell invasion. The organotypic oral cancer model was constructed by growing oral squamous cell carcinoma (OSCC) cells on a collagen matrix in which normal human fibroblasts were incorporated. Immunohistochemical staining of the model showed that the expression of invasion-related molecules such as phosphorylated extracellular signal-regulated kinases 1 and 2 (p-ERK1/2), cyclooxygenase-2 (COX-......
POSTED 03/10/2010 at 06:00 PM --
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Expression of the T-cell-specific adapter protein in oral epithelium
This study is the first to show that TSAd is expressed in normal oral mucosa, that it is important for the normal ultrastructural morphology of the epithelium and the basal membrane, and that it is involved in the migration and proliferation of oral keratinocytes. (Source: European Journal of Oral Sciences)...
POSTED 03/10/2010 at 06:00 PM --
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Applying an excessive mechanical stress alters the effect of subchondral osteoblasts on chondrocytes in a co-culture system
Lin Y-Y, Tanaka N, Ohkuma S, Iwabuchi Y, Tanne Y, Kamiya T, Kunimatsu R, Huang Y-C, Yoshioka M, Mitsuyoshi T, Tanimoto K, Tanaka E, Tanne K. Applying an excessive mechanical stress alters the effect of subchondral osteoblasts on chondrocytes in a co-culture system. Eur J Oral Sci 2010; 118: 151[ndash]158. © 2010 The Authors. Journal compilation © 2010 Eur J Oral Sci Osteoarthritis (OA) sometimes occurs as a consequence of repeated microtrauma involved in parafunction, which may lead to microfracture in the subchondral bone. The aim of this in vitro study was to evaluate the effects of subchondral osteoblasts in loading with repeated excessive mechanical stress on the metabolism of overlying chondrocytes. A high-magnitude cyclic tensile stress of 15 kPa (30 cycles min[minus]1) was applied......
POSTED 03/10/2010 at 06:00 PM --
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Down-regulation of hypoxia inducible factor-1α: a possible explanation for the protective effects of estrogen on genioglossus fatigue resistance
We examined the effects of estrogen on the contractility of the genioglossus by exposing rats to alternating cycles of 6[ndash]8% O2 every 15 s for a total duration of 35 d. The results showed that muscle fatigue resistance was significantly decreased after CIH but was partially reversed after estrogen treatment. Compared with the control group, real-time reverse transcription[ndash]polymerase chain reaction and western blotting showed higher levels of HIF-1[alpha] messenger RNA and protein in the CIH group, but estrogen treatment reduced, in a dose-independent manner, the levels of HIF-1[alpha] messenger RNA and protein in rats exposed to CIH. We conclude that CIH induced the expression of HIF-1[alpha] in the genioglossus and altered the physical properties towards a more fatigable phenot......
POSTED 03/10/2010 at 06:00 PM --
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Cholinergic autoantibodies from primary Sjögren's syndrome modulate submandibular gland Na+/K+-ATPase activity via prostaglandin E2 and cyclic AMP
Passafaro D, Reina S, Sterin-Borda L, Borda E. Cholinergic autoantibodies from primary Sjögren's syndrome modulate submandibular gland Na+/K+-ATPaseactivity via prostaglandin E2and cyclic AMP. Eur J Oral Sci 2010; 118: 131[ndash]138. © 2010 The Authors. Journal compilation © 2010 Eur J Oral Sci We demonstrate that patients with primary Sjögren's syndrome (pSS) produce functional IgG autoantibodies that interact with the glandular M3 muscarinic acetylcholine receptors (mAChRs). These autoantibodies act as a partial muscarinic agonist, increasing prostaglandin E2 (PGE2) and cyclic AMP production through modifying Na+/K+-ATPase activity, but also interfere with the secretory effect of the parasympathetic neurotransmitter. The IgG from patients with pSS has two effects on the submandibular......
POSTED 03/10/2010 at 06:00 PM --
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Gene expression and dental enamel structure in developing mouse incisor
Sehic A, Risnes S, Khan Q-E-S, Khuu C, Osmundsen H. Gene expression and dental enamel structure in developing mouse incisor. Eur J Oral Sci 2010; 118: 118[ndash]130. © 2010 The Authors. Journal compilation © 2010 Eur J Oral Sci At the mouse incisor tip the initially differentiated ameloblasts produce a thin, prism-free enamel, while further apically, in the immediate adjacent segment, the enamel thickness increases and the four-layered enamel of mouse incisor is formed. Comparative gene-expression profiling was carried out on RNA isolated from these two segments of incisor tooth germs at embryonic day (E)17.5 and at postnatal days (P)0, 1, 2, and 10 using microarrays to measure messenger RNA (mRNA) and microRNA (miRNA) species present in the segments. Validation of expression data was ac......
POSTED 03/10/2010 at 06:00 PM --
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Absence of lymphatic vessels in human dental pulp: a morphological study
Gerli R, Secciani I, Sozio F, Rossi A, Weber E, Lorenzini G. Absence of lymphatic vessels in human dental pulp: a morphological study. Eur J Oral Sci 2010; 118: 110[ndash]117. © 2010 The Authors. Journal compilation © 2010 Eur J Oral Sci Few and controversial data are available in the literature regarding the presence of lymphatic vessels in the human dental pulp. The present study was designed to examine morphologically the existence of a lymph drainage system in human dental pulp. Human dental pulp and skin sections were immunohistochemically stained with specific antibodies for lymphatic endothelium (D2-40, LYVE-1, VEGFR-3 [vascular endothelial growth factor receptor-3], and Prox-1), with the pan-endothelial markers CD31 and von Willebrand factor (vWF), and with the blood-specific mar......
POSTED 03/10/2010 at 06:00 PM --
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Topical iodine and fluoride varnish combined is more effective than fluoride varnish alone for protecting erupting first permanent molars: a retrospective cohort study
Conclusions: This evaluation of an ongoing dental public health program adds evidence that topical antiseptics applied at the same time as fluoride varnish are more effective than varnish alone. Randomized trials are needed. (Source: Journal of Public Health Dentistry)...
POSTED 03/09/2010 at 06:00 PM --
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Measuring conceptual health knowledge in the context of oral health literacy: preliminary results
Conclusions: This preliminary study yielded a new measure of oral health conceptual knowledge, available for use in future oral health literacy studies. The author presents a conceptual framework of oral health literacy that separates health literacy into four unique components and places decision-making at the center. Future studies are needed to determine whether this framework is supported by empirical data and leads to improvements in oral health and reductions in health disparities. (Source: Journal of Public Health Dentistry)...
POSTED 03/09/2010 at 06:00 PM --
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Doctor, my tooth hurts: the costs of incomplete dental care in the emergency room
Conclusions: Access to preventive and restorative dental care is a critical public health problem in the United States, particularly for those without insurance and those covered by public programs. Public health policy initiatives such as the use of dental therapists should be expanded to improve access and to provide alternatives that offer more complete and less costly care for oral health problems than do hospital ERs. (Source: Journal of Public Health Dentistry)...
POSTED 03/09/2010 at 06:00 PM --
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The mandible advancement may alter the coordination between breathing and the non-nutritive swallowing reflex
We examined the effect of mandible advancement associated with mouth opening on the coordination between nasal breathing and non-nutritive swallowing induced by continuous infusion of distilled water into the pharyngeal cavity. The combination of mandible advancement and mouth opening increased the duration of swallowing apnoea and submental electromyographic burst duration. When the mandible was advanced with the mouth open, the duration of swallowing apnoea increased significantly compared with the centric position (0·79 ± 0·23 vs. 0·64 ± 0·12 s, P < 0·05, n = 12), and the duration of submental electromyographic activity increased significantly (2·11 ± 0·63 vs. 1·46 ± 0·25 s, P < 0·05, n = 12). Mandible advancement with mouth opening altered the respiratory phase resetting ......
POSTED 03/09/2010 at 06:00 PM --
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