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Archives of Oral Biology

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https://www.readbyqxmd.com/read/29156417/the-effect-of-magnesium-hydroxide-containing-dentifrice-using-an-extrinsic-and-intrinsic-erosion-cycling-model
#1
Vanara Florêncio Passos, Lidiany Karla Azevedo Rodrigues, Sérgio Lima Santiago
OBJECTIVE: To evaluate, in vitro, the effect of Mg(OH)2 dentifrice, and the influence of the number of experimental days, on the extrinsic (citric acid -CA) and intrinsic (hydrochloric acid -HCl) enamel erosion models. DESIGN: Human enamel slabs were selected according to surface hardness and randomly assigned to 3 groups (n=9) as follows: non-fluoridated (negative control), NaF (1450ppm F- positive control) and Mg(OH)2 (2%) dentifrices. The slabs were daily submitted to a 2-h period of pellicle formation and, over a period of 5days, submitted to cycles (3×/day) of erosive challenge (CA 0...
November 14, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29153956/effect-of-laser-activated-bleaching-on-the-chemical-stability-and-morphology-of-intracoronal-dentin
#2
Fabiane Carneiro Lopes, Renato Roperto, Anna Akkus, Ozan Akkus, Regina Guenka Palma-Dibb, Manoel Damião de Sousa-Neto
OBJECTIVES: To evaluate the effect of the bleaching with 35% hydrogen peroxide either activated or not by a 970nm diode laser on the chemical stability and dentin surface morphology of intracoronary dentin. METHODS: Twenty-seven slabs of intracoronary dentin specimens (3×3mm) were distributed into three groups (n=9), according to surface treatment: HP - 35% hydrogen peroxide (1×4'), DL - 970nm diode laser (1×30"/0,8W/10Hz), HP+DL - 35% HP activated with 970nm diode laser (1×30"/0,8W/10Hz leaving the gel in contact to the surface for 4' after activation)...
November 13, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29149622/the-chemokine-receptor-type-4-antagonist-amd3100-interrupts-experimental-tooth-movement-in-rats
#3
Kasumi Hatano, Yuji Ishida, Hiroyuki Yamaguchi, Jun Hosomichi, Jun-Ichi Suzuki, Risa Usumi-Fujita, Yasuhiro Shimizu, Naoki Shibutani, Sawa Kaneko, Takashi Ono
OBJECTIVE: The aim of this study was to clarify the role of the stromal cell-derived factor-1 (SDF-1)/C-X-C chemokine receptor type 4 (CXCR4) axis in osteoclast accumulation, and the influence of orthodontic tooth movement (OTM) under mechanical force application to periodontal tissues, by administration of the CXCR4 antagonist AMD3100. DESIGN: The upper right first molar (M1) of rats was moved mesially with a 10-g force titanium-nickel closed coil spring. Rats were treated with phosphate-buffered saline or AMD3100 (5mg/kg), which is a SDF-1 antagonist...
November 11, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29149621/the-risk-factors-related-to-bruxism-in-children-a-systematic-review-and-meta-analysis
#4
REVIEW
Huaqi Guo, Tongxia Wang, Xiaohong Niu, Hui Wang, Weihan Yang, Jie Qiu, Lan Yang
OBJECTIVE: This systematic review was performed to determine the risk factors related to bruxism in children. DESIGN: This systematic review was conducted with reporting in agreement to the PRISMA statement and according to guidelines from the Cochrane Handbook for Systematic Reviews of Interventions. We conducted a systematic search of seven online databases, with the last search updated on 1st October 2016. The seven databases were Pubmed, Embase, Cochrane Library database, Web of Science, CNKI, CBM, and WF...
November 11, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29132068/secretoneurin-and-pe-11-immunoreactivity-in-the-human-dental-pulp
#5
René Steiner, Reiner Fischer-Colbrie, Athanasia Bletsa, Johannes Laimer, Josef Troger
OBJECTIVE: To explore whether there are differences in the concentration of the secretogranin II-derived peptide secretoneurin and the chromogranin B-derived peptide PE-11 between the healthy and inflamed human dental pulps. Furthermore, colocalization studies with calcitonin gene-related peptide were performed to confirm the sensory origin of the peptidergic nerves in the dental pulp. DESIGN: The concentrations of secretoneurin and PE-11 were determined by highly sensitive radioimmunoassays in extracts of dental pulps, the molecular form of secretoneurin immunoreactivities by RP-HPLC with subsequent radioimmunoassay and colocalization studies with calcitonin gene-related peptide were performed by double immunofluorescence...
November 9, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29128675/regionally-variant-collagen-alignment-correlates-with-viscoelastic-properties-of-the-disc-of-the-human-temporomandibular-joint
#6
Shawn Gutman, Daniel Kim, Solaiman Tarafder, Sergio Velez, Julia Jeong, Chang H Lee
OBJECTIVE: To determine the regionally variant quality of collagen alignment in human TMJ discs and its statistical correlation with viscoelastic properties. DESIGN: For quantitative analysis of the quality of collagen alignment, horizontal sections of human TMJ discs with Pricrosirius Red staining were imaged under circularly polarized microscopy. Mean angle and angular deviation of collagen fibers in each region were analyzed using a well-established automated image-processing for angular gradient...
November 8, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29132069/risk-factors-for-tooth-loss-in-middle-and-older-age-after-up-to-10-years-an-observational-cohort-study
#7
Alexander Jochen Hassel, Volkan Safaltin, Sabine Grill, Johannes Schröder, Hans-Werner Wahl, Anna-Luisa Klotz, Edriss Habibi, Peter Rammelsberg, Andreas Zenthöfer
OBJECTIVE: The objective of this research was to identify risk factors for tooth loss in two birth cohorts, quinquagenarians and septuagenarians, after up to 10 years of clinical observation. DESIGN: One hundred and twenty-three participants were recruited from the Interdisciplinary Study of Adult Development (ILSE) and examined at baseline and up to 10 years after. Thirty-nine and 84 participants belonged to the older (OC; born in 1930/32) cohort and younger (YC; born in 1950/52) cohort, respectively...
November 6, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29128587/selection-in-mixtures-of-food-particles-during-oral-processing-in-man
#8
Hilbert W van der Glas, Esther H-J Kim, Anis Z Mustapa, Wijdan R Elmanaseer
OBJECTIVES: Two processes underlie food comminution during chewing: (1) selection, i.e. every particle has a chance of being placed between the teeth and being subjected to (2) breakage. Selection decreases with particle number by saturation of breakage sites, and it depends on competition between smaller and larger particles for breakage sites. Theoretical models were tested which describe competition between various sizes X. In the one-way model, small particles cannot compete with larger ones because of their smaller height...
October 31, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29101872/evaluation-of-the-bisphosphonate-effect-on-stem-cells-derived-from-jaw-bone-and-long-bone-rabbit-models-a-pilot-study
#9
Jun-Beom Park, Seung-Hyun Cho, InSoo Kim, Won Lee, Seung-Hwan Kang, Heesung Kim
BACKGROUND AND OBJECTIVE: Bisphosphonates have been widely used and the number of patients experiencing medication-related osteonecrosis of the jaw (MRONJ) has been increasing. This study was designed to evaluate the effect of zoledronate on stem cells derived from different tissues. DESIGN: Stem cells derived from four different tissues were compared using rabbit models (JPO: periosteum from the jaw bone (mandible), JBM: bone marrow from the jaw bone, LPO: periosteum from long bone (tibia), and LBM: bone marrow from long bone)...
October 31, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29089101/a-novel-18-bp-in-frame-deletion-mutation-in-runx2-causes-cleidocranial-dysplasia
#10
Li Zeng, Jiahui Wei, Na Zhao, Shichen Sun, Yixiang Wang, Hailan Feng
OBJECTIVES: Runt-related transcription factor 2 (RUNX2) gene is known to cause rare autosomal dominant skeletal disorder Cleidocranial dysplasia (CCD). Here, we explored a novel, large deletion in RUNX2 gene in a Chinese patient with CCD and the function associated with the mutation. DESIGN: Genomic DNA was extracted from the peripheral blood and subjected to do DNA sequencing. Sanger sequencing was used to do mutational analysis of the RUNX2 gene. Function associated with RUNX2 mutation was investigated by performing conservation analysis, secondary structure analysis, subcellular localization study and reporter assay...
October 27, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29127889/nitric-oxide-and-arginase-levels-in-peri-implant-tissues-after-delayed-loading
#11
Ceren Gokmenoglu, Nurdan Ozmeric, Caglar Sungur, Raziye Sahin Bildik, Imge Erguder, Serenay Elgun
OBJECTIVE: Nitric oxide (NO) is synthesized from the conversion of L-arginine to L-citrulline by NO synthase (NOS). Arginase can compete with NOS for the common substrate L-arginine, and thus inhibit NO production. NO levels and arginase ezyme might affect the bone remodeling cycle around implants. The aim of this studywas to investigate NO and arginase levels in gingival crevicular fluid (GCF), peri-implant sulcular fluid (PISF), and saliva. MATERIALS AND METHODS: Twenty patients with one or more implants (Straumann(®); Institute Straumann AG, Basel, Switzerland) restored with fixed crown prostheses were included in the study...
October 23, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29102860/presence-of-dental-signs-of-congenital-syphilis-in-pre-modern-specimens
#12
REVIEW
Stella Ioannou, Renata J Henneberg, Maciej Henneberg
OBJECTIVE: Tooth morphology can vary due to genetic factors, infectious diseases and other environmental stresses. Congenital syphilis is known to interrupt tooth formation i.e. odontogenesis and amelogenesis, producing specific dental characteristics. Variation of those characteristics can occur, resulting in dental signs "not typical" of the disease, however, they are described in the 19th century literature. Past treatments of congenital syphilis with mercury also interrupted dental processes resulting in significantly different dental signs...
October 20, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29102859/three-dimensional-mammalian-tooth-development-using-dicect
#13
Qamariya Nasrullah, Marilyn B Renfree, Alistair R Evans
OBJECTIVE: This study aims to develop the Diffusible Iodine-based Contrast-Enhanced CT (diceCT) method for non-destructive imaging of both soft and mineralised tissues. We sought to document the 3D spatio-temporal pattern of mammalian tooth development including multiple tooth classes and generations, using the tammar wallaby (Macropus eugenii) as a model species. DESIGN: We took microCT scans of developing fetuses and pouch young stained using Lugol's Iodine (I2KI) contrast agent...
October 20, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29080481/the-effects-of-storage-time-and-temperature-on-the-stability-of-salivary-phosphatases-transaminases-and-dehydrogenase
#14
Damaris Raissa Dos Santos, Rayne Oliveira Souza, Layani Bertaglia Dias, Tayná Buffulin Ribas, Luis Cezar Farias de Oliveira, Doris Hissako Sumida, Rita Cássia Menegati Dornelles, Ana Cláudia de Melo Stevanato Nakamune, Antonio Hernandes Chaves-Neto
OBJECTIVES: To investigate the influence of temperature and storage time on salivary acid phosphatase (ACP), tartrate-resistant acid phosphatase (TRAP), alkaline phosphatase (ALP), aspartate aminotransferase (AST) and alanine aminotransferase (ALT) and lactate dehydrogenase (LDH). DESIGN: Unstimulated whole expectorated saliva was collected from healthy men and women subjects (n=26) between 8 and 10a.m. The saliva samples were centrifuged, and the supernatants were measured for ACP, TRAP, ALP, AST, ALT and LDH activities immediately (without freezing) [baseline values] and after time intervals of 3, 7, 14 and 28days (d) of storage at -20°C and -80°C using spectrophotometric methods The influence of storage time was analyzed by one-way ANOVA followed by the Dunnett post-test, while the paired Student's-t-test was used to compare the differences between the temperature (p<0...
October 20, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29073562/dipeptidyl-peptidase-4-inhibitor-enhances-restoration-of-salivary-glands-impaired-by-obese-insulin-resistance
#15
Jitjiroj Ittichaicharoen, Nattayaporn Apaijai, Pongpan Tanajak, Piangkwan Sa-Nguanmoo, Nipon Chattipakorn, Siriporn Chattipakorn
OBJECTIVE: Chronic high-fat diet consumption causes not only obese- insulin resistance, but also leads to pathological changes in salivary glands, including increased mitochondrial dysfunction, apoptosis, oxidative stress, and inflammation. Dipeptidyl peptidase-4 inhibitor (vildagliptin) is an oral anti-diabetic drug, using for treatment of type 2 diabetes. Vildagliptin has been shown to exert beneficial effects on several organs in cases of obese-insulin resistant condition. However, the effect of vildagliptin on salivary glands impaired by obese-insulin resistance has not been investigated...
October 20, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29127888/histamine-stimulates-secretion-of-extracellular-vesicles-with-nucleotidase-activity-in-rat-submandibular-gland
#16
Débora Alejandra González, Martín Matías Barbieri van Haaster, Emmanuel Quinteros Villarruel, Macarena Brandt, María Belén Benítez, Graciela Mabel Stranieri, Betina Orman
BACKGROUND: Extracellular vesicles released by different cells have been isolated from diverse fluids including saliva. We previously reported that rat submandibular glands secrete nanovesicles that catalyze hydrolysis of ATP, ADP and AMP, which are actors of the purinergic signaling system along with adenosine. Extracellular nucleotides like ATP and adenosine are involved in the regulation of inflammatory processes and apoptosis. Histamine, a widely distributed biogenic amine, is involved in inflammatory response...
October 18, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29102025/lupinifolin-from-albizia-myriophylla-wood-a-study-on-its-antibacterial-mechanisms-against-cariogenic-streptococcus-mutans
#17
Surasak Limsuwan, Kotchakorn Moosigapong, Siriporn Jarukitsakul, Nantiya Joycharat, Sasitorn Chusri, Patcharawalai Jaisamut, Supayang Piyawan Voravuthikunchai
OBJECTIVE: To determine the anti-Streptococcus mutans mechanisms of action of lupinifolin from Albizia myriophylla Benth. (Fabaceae) wood and provide scientific evidence to support the traditional use of the plant against dental caries. METHODS: The minimum inhibitory concentration (MIC) was evaluated using the broth micro-dilution method. The effects of lupinifolin on bactericidal activity, bacterial cell walls, and membranes were investigated by time-kill, lysis, and leakage assays, respectively...
October 18, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29100105/effectiveness-of-three-age-estimation-methods-based-on-dental-and-skeletal-development-in-a-sample-of-young-brazilians
#18
Marcelo Afonso Machado, Eduardo Daruge Júnior, Mário Marques Fernandes, Igor Felipe Pereira Lima, Graziela Oro Cericato, Ademir Franco, Luiz Renato Paranhos
OBJECTIVE: This study compared three methods designed for age estimation. METHODS: A sample of 468 radiographs (234 panoramic and 234 carpal radiographs) collected from patients ranging from 5 to 14 years old (mean age: 11.27years old±2.27years) was used. Three age estimation methods: were applied: one founded on dental development, one founded on hand and wrist development, and a method combining both measurements. For each method, the mean error (ME), mean absolute error (MAE), root mean square error (RMSE), and mean percentage of absolute error (MPAE) were quantified...
October 18, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29073563/effect-of-chronic-stress-on-capsaicin-induced-dental-nociception-in-a-model-of-pulpitis-in-rats
#19
Maryam Raoof, Ehsan Ashrafganjoui, Razieh Kooshki, Mehdi Abbasnejad, Jahangir Haghani, Sara Amanpour, Mohammad-Reza Zarei
OBJECTIVE: Chronic stress can alter nociceptive sensitivity. However, the effect of stress exposure on dental nociception has been less addressed. Therefore, the present study investigated the effects of chronic exposures to some social and psychological stresses on pulpal nociceptive responses. DESIGN: The stress groups were constructed as follows: forced swimming (n=6), restraint (n=6), and mild (n=10) and severe (n=15) crowding stresses. Rats were subjected to stress for 1h per day for a week...
October 18, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29100106/l-mimosine-and-hypoxia-enhance-angiopoietin-like-4-production-involving-hypoxia-inducible-factor-1alpha-insights-from-monolayer-and-spheroid-cultures-of-dental-pulp-derived-cells-and-tooth-slice-cultures
#20
Klara Janjić, Umar Alhujazy, Andreas Moritz, Hermann Agis
OBJECTIVE: Angiopoietin-like 4 (Angptl4) is an angiogenesis modulating signaling factor and as such involved in blood vessel formation but also in hard tissue resorption. Here we hypothesized that the hypoxia mimetic agent L-mimosine (L-MIM) and hypoxia stimulate the production of Angptl4 in the dental pulp. MATERIAL AND METHODS: Monolayer and spheroid cultures of primary human dental pulp-derived cells (DPC) were treated with L-MIM or hypoxia. Furthermore, tooth slice cultures were performed...
October 16, 2017: Archives of Oral Biology
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