bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of sterilization methods on the absorption capacity of absorbent paper points
Authors: Aguiar Carlos Menezes , Torres Thaísa , Mendes Daniela , Farias Bruna , Câmara Andréa Cruz
Published: May 2015

The purpose of the present study was to analyze the influence of sterilization methods on the absorption capacity of different brands of standardized absorbent paper points, testing the hypothesis that there is a positive correlation between the percentage of increased absorption capacity and sterilization method. Standardized endodontic absorbent paper points (size rank from #15 to #40) from three different brands of three manufacturers were used for this study (Dentsply, Endopoints, Tanari). Twenty absorbent paper points of each size were used. The initial weight (iw) of each absorbent paper point was recorded using a digital scale. After sterilization, the dry weight (dw) of each absorbent paper point was determined. Each paper point was then introduced into a 2% methylene blue solution during 20 seconds until complete saturation. The paper points were removed from the solution and the wet weight (ww) was determined, with absorption capacity calculated from a difference between ww-dw. Data was statistically analyzed using Tukey’s test and the Student’s t-test (p<0.05). Tanari paper points exhibited the best absorption capacity among the brands analyzed, but the difference was non-significant. Sterilization process did not influence the absorption capacity of absorbent paper points.
Evaluation of the increase in orthodontic treatment demand in adults
Authors: Werneck Eduardo César , Mattos Fernanda Silva , Da Silva Márcio Garcia , Do Prado Renata Falchete , Araújo Adriano Marotta
Published: May 2015

Preventive measures in Dentistry and the modernization of the orthodontics appliances led adult patients to seek orthodontic treatment to improve their appearance and social acceptance, as well as function and oral health. Adult patients present some peculiarities such as periodontal disease and tooth loss which complicates the mechanotherapy, requiring a multidisciplinary team and a more complex mechanics. Thus, the aim of this study was to verify the proportion of young and adult patients who started orthodontic treatment in the period from 2000 to 2010, as well as the total percentage, and to correlate male and female values. The sample of 3,272 patients was divided into three groups according to the age: up to 20 (group 1), from 20 to 40 (group 2) and above 40 years-old (group 3), according to gender. It was found that most patients were young (group 1: 71.85%). However, the number of adults from 20 to 40 years-old represents a considerable share of 26.52%. Above 40 years-old, 1.61% patients sought for orthodontic treatment. If we consider the patient in the age-range above 20 years-old as adult, there was a considerable increasing in the values from 12.14%, in 2000 to 27.81% in 2010, especially in females (31.26%), mainly in groups 2 and 3, showing that dental aesthetics is an important factor for the individual social insertion.
Durable bonds at the adhesive/dentin interface:an impossible mission or simply a moving target?
Authors: Spencer Paulette , Ye Qiang , Park Jonggu , Misra Anil , Bohaty Brenda S. , Singh Viraj , Parthasarathy Ranga , Sene Fabio , Gonçalves Sergio , Laurence Jennifer
Published: May 2015

Composite restorations have higher failure rates, more recurrent caries and increased frequency of replacement as compared to dental amalgam.  Penetration of bacterial enzymes, oral fluids, and bacteria into the crevices between the tooth and composite undermines the restoration and leads to recurrent decay and failure.  The gingival margin of composite restorations is particularly vulnerable to decay and at this margin, the adhesive and its seal to dentin provides the primary barrier between the prepared tooth and the environment.    The intent of this article is to examine physico-chemical factors that affect the integrity and durability of the adhesive/dentin interfacial bond; and to explore how these factors act synergistically with mechanical forces to undermine the composite restoration.  The article will examine the various avenues that have been pursued to address these problems and it will explore how alterations in material chemistry could address the detrimental impact of physico-chemical stresses on the bond formed at the adhesive/dentin interface.
Evaluation and development of a bone age assessment method in patients with Down syndrome
Authors: Moraes Michelle Bianchi de , Moraes Mari Eli Leoneli de , Raldi Fernando Vagner , Ragone Simone Maria Guimarães , Holleben Déborah
Published: May 2015

This study evaluated the applicability of the method developed by Caldas to measure vertebral bone age for Brazilians suffering from Down syndrome. A database comprised of 57 case records of individuals with this syndrome, both male and female, with age ranging between 5 and 18 years, was assessed. These records had lateral cefalometric radiographies and radiographies of hand and wrist, being all obtained on the same date. Also, 48 records of individuals not suffering from Down syndrome were assessed. For the hand and wrist radiographies the Tanner and Whitehouse (TW3) method was used, and bone age was obtained. The Caldas method was employed on the lateral cefalometric radiographies in order to obtain the vertebral bone age. From the information about the bone age, vertebral bone age and chronological age, the Wilcoxon test was used to compare all the ages in pairs. There was a statistically significant difference between the three ages mentioned above for both male and female control group and female Down syndrome group. Therefore, this method was only suitable for  Down syndrome male individuals. Based on the results, a formula to obtain the bone age for Down syndrome individuals was developed.
Scanning Electron Microscopy in modern dentistry research
Authors: Paradella Thaís Cachuté , Bottino Marco Antonio
Published: May 2015

The purpose of this article was to review the usage of Scanning Electron Microscopy (SEM) in dentistry research nowadays, through a careful and updated literature review. By using the key-words Scanning Electron Microscopy and one of the following areas of research in dentistry (Endodontics, Periodontics and Implant), in international database (PubMed), in the year of 2012 (from January to September), a total of 112 articles were found. This data was tabled and the articles were classified according to the usage of SEM (magnification and type of detector) and if this information was obtained either in the summary or only in the full-text article. A critical review was also performed, with new guidelines regarding the usage of SEM in modern dentistry research.
Depression and TMD among elderly: A pilot study
Authors: Vilalta Valéria C. , Dos Santos Mateus Bertolini Fernandes , Da Cunha Vicente P.P. , Marchini Leonardo
Published: May 2015

Objectives: Temporomandibular dysfunction (TMD) is a painful syndrome that affects orofacial region, with deleterious effects in patients’ quality of life. Several aspects of TMD among the elderly are still controversial in the literature. The aim of this paper is to verify the prevalence of TMD among the elderly in Taubaté – Brazil, and its possible association with other co-morbidities. Material and Methods: Sixty-eight elderly individuals, presenting an average age of 69.5 years (SD 8.5), participated in this study, 37 of which were female. The Research Diagnostic Criteria for Temporomandibular Dysfunction (RDC/TMD) was used to verify TMD and its possible association with other co-morbidities. Results: The studied sample presented a low prevalence of TMD according to RDC/TMD (10.3%). Women presented more non-specific physical symptoms than men (pain items included, p=0.016, x2 test). Depression and non-specific physical symptoms (pain items excluded) did not correlate with patients’ gender. Associations were found among depression and characteristic pain intensity (p=0.027, ANOVA), non-specific physical symptoms (pain items included, p<0.001), non-specific physical symptoms (pain items excluded, p=0.001) and chronic pain grade (p=0.004), whereas the more depressed the patients were, the higher were their pain scores. Conclusions: One can conclude that psychological factors, such as depression, were associated with TMD prevalence, thus reinforcing the need for a multidisciplinary approach for TMD treatment. Key-words: Clinical Assessment; Depression; Elderly; Research Diagnostic Criteria for Temporomandibular Disorders; Temporomandibular Disorder.
Impact of excess cement removal on vertical misfit and cement line quality in onlays
Authors: Soares Matteo Baiotto , Inoue Ricardo Tatsuo , Naves Lucas Zago , Martinelli Janisse , Gonçalves Luciano de Souza
Published: May 2015

Aim: To evaluate the vertical misfit and cement line quality of partial ceramic restorations cemented with resin luting cements using two different methods for cement remove excess. Materials & Methods: Lithium di-silicate restorations were fabricated and cemented at 24 human molars that receive onlay type preparations. The specimens were randomly divided in two groups (n=12): Group 1 (G1) where the cement excess was removed at pre-gel stage and Group 2 (G2) with the cement excess removed after the polymerization. The vertical misfits at cement line were measurements twice, before and after cementation. Epoxy resin replicas of the specimens were obtained and the cement line quality was analyzed with the scanning electron microscope before and after the finishing and polishing procedures and classified as unsatisfactory, acceptable or good conditions. The vertical misfits values were submitted to Student test (p<0.05) and the quality line data were analyzed with Mann-Whitney for independent samples (p<0.05) and Wilcoxon test for paired specimens (p<0.05).Results: The statistical analysis showed that vertical misfit and the cement line quality presented no difference values to G1 and G2. However, finishing and polishing procedures affect positively the cement line quality in the both groups. Conclusion: The excess cement removal methods had no influence on the vertical misfit and cement line quality for the restorations. The finishing and polishing procedures improved the cement line quality in both groups.
824 - The use of lasers in restorative dentistry: truths and myths
Authors: Steiner Oliveira Carolina , Müller Ramalho Karen , Bello-Silva Marina Stella , Côrrea Aranha Ana Cecília , De Paula Eduardo Carlos
Published: May 2015

As pesquisas tem investigado do uso do laser na odontologia
Study of the psychological preparation on the dental care of children with special needs
Authors: Rocha João Carlos
Published: May 2015

The psychology in Dentistry is a great challenge for the clinicians during the care of their patients. The conditioning of a patient to achieve a behavior meeting the professional’s needs for developing a procedure within the quality standards is necessary. When this conditioning focuses on the child patients the challenge is even greater because the child will use all ways to make difficult the action of the clinician due to fear or discomfort. The ability of the dentist to condition the patient will be directly proportional to the training and theoretical knowledge acquired. Considering the Patients with Special Needs (PSN), this training should be differentiated because there is the physical, cognitive, and the previous dental/medical history in addition to the psychological and emotional difficulties. The aim of this study was to evaluate the profile of the patient to be conditioned satisfactorily and which conditioning techniques would be more efficient to ambulatory dental care of PSN.  Thirty patients, both genders, aged from 20 months to 11 years-old who were enrolled at the ambulatory treatment of NEAPE were observed.  It was concluded that when there is the cognitive development of the individual, they are able to be conditioned for the ambulatory care; the use of auxiliary methods is important in the conditioning for the ambulatory care of the individuals; the syndromic patients had the best results for the conditioning aiming to the ambulatory care; there was a significant improvement in the behavior of individuals between the first and last appointments.
Complementary and integrative practices inoral health: A Systematic Review
Authors: Filice de Barros Nelson
Published: May 2015

Abstract Objective: To present a systematic literature review on the use of Complementary and Integrative Practices (CIP) in the field of dentistry. Methods: Randomized, controlled clinical trials (RCT) were selected from the PubMed-MEDLINE data base (2000-2010). The articles were classified according to the type of therapy, level of significance of results, impact factor and area of knowledge of the periodicals. Results: Ninety-one RCTs were included: 42(47%) are on Laser therapy, 32(35%) Phytotherapy, 14(15%) Acupuncture, 2(2%) Homeopathy and 1(1%) on Hypnosis. The results showed negative evidences, particularly for Laser therapy (n=28;31%), whereas Phytotherapy (n=20;22%), Acupuncture (n=11;12%) and Homeopathy (n=2;2%) presented higher frequency of positive results. The RCTs researched were published in journals related to dentistry (n=59;64%), medicine (n=21;23,5%), other areas (n=7;8%) and CIP (n=4;4,5%). Conclusions: It was concluded that there are positive evidences for the use of some types of CIP in oral health. However, they are limited as regards their quality and consistency, with little difference between the positive and negative results, characterizing little force of evidence, and consequently low potential for clinical application, in accordance with the principles of evidence-based dentistry. Keywords: Acupuncture; Homeopathy; Phytotherapy; Hypnosis; Flower Therapy; Laser Therapy.
Sintering dental porcelain with CO2 laser: porosity and mechanical characterization
Authors: Sgura Ricardo , Reis Mariana Cavalcante , Andreeta Marcello Rubens Barsi , Hernandes Antônio Carlos , Medeiros Igor Studart
Published: May 2015

Aim: This work evaluated dental porcelain sintering by CO2 laser irradiation. Methods: Two commercial veneering porcelains were used: VM7 and VM9 (VITA Zahnfabrik).  Porcelain disks (0.35 mm dia. x 2.0 mm) were sintered by a continuous CO2 laser (Coherent, USA – 35 W e ?= 10.6 ?m) in two irradiances (20 and 23 W/cm2) and exposure times: 5 and 10 min. A control group was sintered in a conventional oven following manufacturer’s instructions. After sintering, one of the disks surfaces was mirror polished. Superficial pores (%) were assessed by images obtained in an optical microscope (100x) submitted to the software Image J analysis. Apparent density was measured by Archimedean’s method. Microhardness and fracture toughness (Indentation Fracture - IF) were determined with a Vickers indenter (Shimadzu). Results: Porosity ranged between 4.0 and 5.9% for irradiated specimens; control group had 6.0 and 4.7% of porosity for porcelain VM7 and VM9 respectively. Density of porcelain VM7 irradiated for 10 min. with irradiance of 23 W/cm2 was significantly higher than control group. Microhardness and fracture toughness of irradiated specimens were similar to control. The measurements of some irradiated groups were not possible to achieve because the tests revealed irregular marks after indentation. Conclusions: Porcelain sintering with CO2 laser in some fluences produced a material with superficial porosity similar to that obtained in conventional oven. Microhardness and fracture toughness could not be measured for all irradiated groups suggesting some subsuperficial defect caused by entrapped gases or cracks originated by temperature gradient along the specimen.
Schwartz-Jampel Syndrome: a paediatric dentistry approach
Authors: Turrioni Ana Paula Silveira , Sakima Sarah Ayumi , Giro Elisa Maria Aparecida
Published: May 2015

Schwartz-Jampel syndrome (SJS) is a rare recessive disorder characterized mainly by myotonia. As the clinical signs and symptoms are manifested in the oromaxillofacial region, paediatric dentists may be first choice of parents that seek information and assistance to their children. A female patient diagnosed with SJS was brought to our clinic for dental treatment with main complain of difficulty on oral hygiene and mastication due to tooth crowding. The treatment included preventive measures, extraction of a supernumerary tooth and the maxillary primary second molars. Furthermore, the patient was referred to orthodontic treatment for correction of tooth crowding. When dealing with children with confirmed diagnosis of SSJ, paediatric dentists should be understand the need of planning the dental treatment considering the characteristics and possible complications associated with the syndrome in order to reduce the risks to patients, especially when surgical procedures are necessary.
Influence of ultrasound and irrigant solutions on the bond strength of glass fiber posts to root canal dentine
Authors: Lacerda Ana Júlia Farias , Gullo Marina Augusto , Xavier Ana Claudia Carvalho , Pucci César Rogério , Carvalho Cláudio Antonio Talge , Huhtala Maria Filomena Rocha Lima
Published: May 2015

Objective: Assessment of the influence of theultrasound and irrigant solutions on the bondstrength (BS) of glass fiber posts. Material andMethods: Sixty-six roots of bovine teeth standardizedat 16 mm were used. The roots were submitted to abiomechanical preparation up to size #80 Kerr file,with irrigation of 5ml of saline solution at everyfile change and then filled. The canals underwentpartial desobturation and were divided into 6 groupsaccording to the irrigant solution and the use ofultrasound prior to the post cementation: S – salinesolution; C – 2% chlorhexidine solution; H –2.5%sodium hypochlorite solution; US – saline solution+ ultrasound; UC – 2% chlorhexidine solution +ultrasound; UH – 2.5% sodium hypochlorite solution+ ultrasound. After the cementation of the posts, thespecimens were cut into 3 slices of 2 mm of thickness,perpendicular to its long axis. The samples weresubmitted to push-out test with crosshead speed of1 mm/min and load of 50kgf. The data obtainedwere submitted to ANOVA and Tukey test (level ofsignificance of 5%). Results: Groups C 7.77(±1.8)a,UC 7.82(±1.6)a, S 7.33(±2.2)a, US 6.16(±2.3)a, H5.43(±1.3)b, UH 5.01(±2.3)b values in Mpa. Onlythe irrigant solutions showed statistically significantdifferences (<0.05). Tukey test revealed smallerbond strength for the specimens treated with SodiumHypochlorite (b). Conclusions: The ultrasoundtreatment did not show significant differencecompared with the other groups; therefore, its usecan be indicated prior to the cementation of glassfiber posts without damage to the bond strength. Thesodium hypochlorite solution showed the smallest BSvalues compared with the other groups.
Cytotoxicity of non-vital dental bleaching agents in human gingival fibroblasts
Authors: Fernandes Aletéia Massula , Marques Marcia Martins , Camargo Samira Esteves Afonso , Cardoso Paula Elaine , Camargo Carlos Henrique Ribeiro , Valera Marcia Carneiro
Published: May 2015

Purpose: The aim of this study was to compare several non-vital dental bleaching agents for their in vitro cytotoxicity to human gingival fibroblasts primary cell line.Methods: The cells were cultivated in DMEM and were seed in plates of 96 wells; then, it was exposed to the conditioned medium according to the experimental groups (n=12): G1- SP (sodium perborate) + distilled water; G2- SP + 20% CP (carbamide peroxide); G3- 20% CP; G4- SP + 35% HP (hydrogen peroxide); G5- 35% HP. In the control group (n=12), corresponded to the curve of cell growth and viability, the cells did not receive any treatment. Cell viability was measured photometrically using a MTT assay after a 24h and 48h of exposure period. Data were submitted to ANOVA and Tukey’s tests.Results: All the experimental groups presented high cytotoxicity statically in comparison to the control group. The rank of  the most to the least toxic material after 24 hours was: SP + DW > 35% PH > PS + 20% PC > PS + 35% PH > 20% PC; and after 48 hours was: SP + DW > PS + 20% PC > 35% PH > PS + 35% PH > 20% PC. All the bleaching agents had presented cytotoxicity effects, reducing significantly the cell viability, however, in the conditions that the study was conducted the association of sodium perborate with distilled water was the most toxic bleaching agent.
Dental Erosion: an overview on definition, prevalence, diagnosis and therapy
Authors: Picchi Comar Livia , Salomão Priscila Maria Aranda , Martines de Souza Beatriz , Magalhães Ana Carolina
Published: May 2015

Currently, it has been observed a significant increase in the prevalence of dental erosion as a consequence of frequent exposure to acids from foods, drinks and gastric juice. The aim of this review was to give some new insights about the definition and diagnosis of this condition, to clarify the causal factors and to show the preventive strategies and restorative therapy. Dental erosion is complex condition dependent on the interaction of chemical, biological and behavior factors. The diagnosis is generally performed by the analysis of the clinical appearance of the lesions in combination with the patient’s history. Some new technologies have been developed to help in early diagnosis and to quantify dental erosion in different phases. Preventive measures are established according to the causal factors, which may include the dietary intervention, modification of acidic drinks, and behavioral changes, or the modification of the tooth surface to increase its resistance against acidic attacks. The restorative treatment may range from minimally invasive therapies to multidisciplinary interventions. The clinicians should know how to detect the condition early, so that preventive measures can be applied before the lesions progress. Therapeutic strategies in high-risk patients should be as conservative as possible, involving multidisciplinary and preventive approaches with a periodic control for the success of the treatment.  Key-words: Epidemiology, Prevention, Rehabilitation, Treatment, Tooth erosion
Strain Gauge analysis of non-axial loads in three-element implant-supported prostheses
Authors: Sousa Talitha de Cássia Silva , De Lelis Vanda , Miyazi Santos Vivian Mayumi , Nogueira de Melo Nishioka Gabriela , De Oliveira Vasconcellos Luis Gustavo , Sussumu Nishioka Renato
Published: May 2015

This study evaluated “in vitro”, the microstrain around three external hexagon implants linearly placed after static loadings on non-axial points of Co-Cr superstructures. The implants were inserted into a polyurethane block and their microunit prosthetic abutments were screwed with torque of 20 Ncm. Four strain gauges were linked to the block around the implants. Onto the abutments, Co-Cr superstructures (n = 5) were screwed with torque of 10 Ncm. The static vertical loads of 30 kg were applied for 10 s during 3 repetitions in four non-axial points located perpendicularly to the long axis (A and B) and another two points at the extremity of the superstructure (A` and B`). The data were recorded with the aid of a conditioner of electrical signals and the Strain-Smart software. The results obtained were submitted to Analysis of Variance (ANOVA). It could be concluded that there were no significant differences in the effects of the applications of non-axial loads of this present study (p = 0.6464). Also, there were no differences between the displacement means, 3 mm for A and B; 5 mm for A’ and B’ (p = 0.8731). KeywordsBiomechanics, Dental implant, Dental prosthesis.
Effectiveness of low level laser therapy in the treatment of TMD myalgia - Two case reports
Authors: Rêgo Heleine Maria Chagas , Gutierrez Natalia Cortez , Esper Maria Ângela Lacerda Rangel , Corazza Pedro Henrique , Martinelli Carolina da Silva Machado , Campos Fernanda , Torres Carlos Rocha Gomes , Gonçalves Sérgio Eduardo de  Paiva
Published: May 2015

Objective: To report two cases of low level laser therapy used in the treatment of muscle pain caused by temporomandibular disorders (TMDs). Methods: Two patients of the São José dos Campos Dental School (UNESP) were selected and subjected to eight applications of low level laser therapy (diode). Laser was punctually applied on masseter and temporalis muscles bilaterally. Three methods were used to evaluate the effectiveness of treatment: pressure algometer, visual analog scale (VAS) and maximal mouth opening. Each measure was performed before and after the laser therapy session. The results were subjected to statistical analysis (ANOVA two factors and Tukey's test, ? = 0.05). Results: For both patients, no significant difference was found between the results obtained by algometer before and after laser application within each session. Nonetheless, VAS showed a tendency to lower values after laser application. The highest values obtained by the pressure algometer were found between days 9 (fourth application) and 16 (sixth application), in both cases. Both patients had an improvement in mouth opening. Conclusions: The assessment methods used were quite practical to register the pain before and after treatment. Therapy with low level laser seems to have a beneficial effect for muscle pain of temporomandibular joint (TMJ).
Effects of Typified Propolis on Mutans Streptococci and Lactobacilli: a Randomized Clinical Trial
Authors: Anauate-Netto Camillo , Marcucci Maria Cristina , Paulino Niraldo , Anido-Anido Andréa , Amore Ricardo , Mendonça Sergio de , Borelli Neto Laurindo , Bretz Walter Antonio
Published: May 2015

Objective: The aim of this study was to determine in arandomized, double-blind, placebo-controlled clinicaltrial the effects of typified propolis and chlorhexidinerinses on salivary levels of mutans streptococci (MS)and lactobacilli (LACT). Methods: One hundredpatients were screened for salivary levels of MS>100,000 CFUs/mL of saliva. All patients presentedwith at least one cavitated decayed surface. Sixtypatients met entry criteria. Subjects were adults 18-55 years old. After restoration of cavitated lesionspatients were randomized to 3 experimental groups:1) PROP-alcohol-free 2% typified propolis rinse (n =20); 2) CHX- 0.12% chlorhexidine rinse; 3) PL-placebomouthrinse. Patients rinsed unsupervised 15 mL ofrespective rinses twice a day for 1 min for 28 days.Patients were assessed for the salivary levels of MS(Dentocult SM) and LACT (Dentocult LB) at baseline,7-day, 14-day, and at 28-day visits (experimentaleffects) and at 45-day visit (residual effects). Generallinear models were employed to analyze the data.Results: PROP was superior to CHX at 14-day and28-day visits in suppressing the salivary levels of MS(p<.05). PROP was superior to PL at all visits (p < .01).The residual effects of PROP in suppressing the salivarylevels of MS could still be observed at the 45-day visit,where significant differences between PROP and CHX(p < .05), were demonstrated. PROP was significantlysuperior than CHX in suppressing the levels of salivaryLACT at the 28-day visit (p < .05).Conclusion: Typifiedpropolis rinse was effective in suppressing cariogenicinfections in caries-active patients when compared toexisting and placebo therapies.
Microtensile test in dental research. controversial aspects in statistical analysis (experimental unit and premature failures)
Authors: Barcellos Daphne Camara , Pagani Clovis , Cardoso Mayra , Balducci Ivan
Published: May 2015

Aims: The aim of this study was to present the controversial aspects in performing inferential statistical analysis with regard to selection of the experimental unit and procedures adopted in the case of pre-test failures.Material and Method: Eighty-seven dissertations and theses in the field of dentistry were evaluated, in which microtensile testing available at three public Universities in the State of São Paulo were performed, namely:  School of Dentistry, USP; School of Dentistry, Unesp (Araraquara and São José dos Campos) and the Piracicaba School of Dentistry (Unicamp).Results: As regards the experimental unit, 34 (39.08%) theses and/or dissertations used the “stick” and 53 (60.91%) the “tooth/block” type. With regard to pre-test failures, 9 (10.34%) theses and/or dissertations  attributed the value “0”, 6 (6.89%) disregarded the sticks,  2 (2.29%) attributed the minimum value of 2 MPa, 1 (1,14%) the minimum value of 4 MPa, 1 (1.14%) attributed half the minimum value of the group and 68 (78.16%) did not mention the occurrence of pre-test failures.Conclusion: As regards the experimental unit, at present the experimental unit is considered the tooth (or ceramic bloc) and not the stick. With regard to pre-test failures, the following are considered: Attribution of a minimum bond strength value under the experimental condition or in the group considered; expressing the number and percentage of cases of failures under each experimental condition; which failures were included in the statistical analysis and making a comparison between the analysis with exclusion of the sticks and analysis without inclusion of the sticks.
New Trends in Dentin Bonding: Treatment with chlorhexidine, hyaluronic acid, vitaminc C and green tea
Authors: Fonseca Beatriz Maria da , Pleffken Patrícia Rondon , Balducci Ivan , Tay Franklin , Pucci Cesar Rogerio , Araujo Maria Amélia Maximo
Published: May 2015

Objective: The aim of this study was to evaluate the bond strength of dentin treated with chlorhexidine, hyaluronic acid, vitamin C and green tea. Material and Methods: The roots of 50 bovine teeth were removed and buccal coronal dentin was exposed. After acid-etching, the specimens were divided into 5 groups (n = 10), according to the dentin treatment strategy: CO - untreated dentin; CHX - treated with 2 wt% chlorhexidine for 30 sec; HA - treated with 1 wt% hyaluronic acid for 30 sec; VC - treated with 10 wt% vitamin C for 30 sec; GT - treated a 1% green tea extract for 30 sec.  Adper Single Bond was then applied to the treated according to the manufacturer's recommendations. The specimens were restored with a 4-mm thick layer of the resin composite, which was polymerized for 40 sec. The specimens were stored in distilled water at 37°C for 24 h and sectioned into 1x1 mm2 sticks containing the adhesive interface. Microtensile bond strength testing was performed with a universal testing machine at a cross-head speed of 1.0 mm/min. Results: The results were analyzed with one-factor ANOVA and Tukey’s multiple comparison tests. GT group presented the highest values bond strength (29.4±3.1)a, but no significant difference compared to the other experimental groups HA(26.7±3.1)ab, CHX(25.4±2.6)ab and VC(22.4±6.0)b. Bond strengths of experimental groups were not significantly different from the CO. Conclusion: Immediate bond strength was preserved after acid-etched dentin was treated.Keywords: Chlorhexidine. Hyaluronic acid. Vitamin C. Green tea. Bond strength.
Antifungal effect of plant extracts on Candida albicans biofilm on acrylic resin
Authors: Oliveira Jonatas Rafael de , Vilela Polyana das Graças Figueiredo , Oliveira Felipe Eduardo de , Belato Kely Karina , Carvalho Cláudio Antonio Talge , Jorge Antonio Olavo Cardoso , Oliveira Luciane Dias de
Published: May 2015

Objective: Evaluating the antifungal potential ofEquisetum arvense L. (horsetail), Glycyrrhiza glabraL. (licorice), Punica granatum L. (pomegranate) andStryphnodendron barbatimam Mart. (barbatimão)extracts, after Candida albicans biofilm formationon acrylic resin. Material and methods: C. albicansstandard strain was cultured on Sabourauddextroseagar for 24 h at 37 °C. After standardizedin a spectrophotometer, 100 ?L of the inoculum(106 cells/mL) and a sterile acrylic resin discwere maintained in Brain Heart Infusion brothsupplemented with sucrose (5%), for 5 days at 37ºC. The samples of the treated groups (n = 10) wereseparately exposed to a concentration of 50 mg/mLof each extract for 5 minutes or to nystatin (48.83IU/mL). For the untreated group (control, n = 10),it was used sterile saline (0.9% NaCl). Biofilmswere disaggregated from the acrylic resin discs byan ultrasonic homogenizer for 30 s. After decimaldilutions, sowings in Sabouraud-dextrose plateswere made with incubation for 48 h at 37°C. Later,CFU/mL was verified and the values were convertedto log10 and they had their statistical analysis done(ANOVA and Tukey Test, p ? 0.05). Results: It wasfound that all plant extracts and nystatin resultedin significant reduction of C. albicans biofilm (p <0.01) compared to the control group (0.9% NaCl).However, all of them showed similar reductions toeach other (p = 0.1567). Conclusion: There wasbiofilm formation of C. albicans on acrylic resin andall plant extracts were effective against this yeast,acting similarly to nystatin.
Impact of prenatal protein-calorie malnutrition on the odontogenesis of wistar rats
Authors: Rocha Juliana Schaia , Baldani Márcia Helena , Lopes Célia Maria da Lozzo
Published: May 2015

Objective: This study aimed to determine changes in odontogenesis arising from prenatal and postnatal protein-calorie malnutrition. Materials and methods: Twelve adult Wistar rats were selected; 8 females and 4 males. The females were divided into two groups, one of which received a normoproteic diet (NG) and the other received a hypoproteic diet (HG). After the birth of the litters, 24 pups were randomly separated from each group. The animals were sacrificed, 12 at five-days old and 12 at eight-days old, and their jaws were subjected to histological preparation to obtain cuts of tooth germs. Forty-eight slides were selected that presented the germs properly cut (24 from each group), which were analyzed by microscopy and measured by a calibrated examiner. The differences between means were verified by the nonparametric Mann-Whitney test. Results: The results showed that at 5 days the differences in thickness of enamel and dentin were statistically significant between NG (84.08 ± 28.9 and 141.51 ± 33.2; p = 0.026) and HG (47.26 ± 43.8 and 91.19 ± 54.7; p = 0.006). At 8 days of life there were no significant differences between the groups. Conclusion: The results showed evidence of the impact of malnutrition on the thickness of dental tissues. It is suggested that further work is carried out in this line of research with more complex designs.
Masticatory muscle activity evaluation by electromyography in removable partial denture users
Authors: Amorim José Benedito Oliveira , Rabelo Sylvia Bicalho , Souza Ana Carolina , Corazza Pedro Henrique , De Araújo Rodrigo Máximo , Cavalcanti Sâmia Carolina Mota , Valera Márcia Carneiro
Published: May 2015

Objectives: The aim of this study was to evaluateby electromyography the activity of the temporalisand masseter muscles in removable partial dentures(RPDs) users, before and after new RPDs installation.Material and Methods: Ten patients were selectedfor this study. All subjects were edentulous in theposterior mandibular region (Kennedy class I orII), fully dentate in the antagonist arch, and dentalprosthesis users, which needed to be replaced. Theelectromyographic activity (EMG) recorded thesuperficial masseter and temporalis muscles, duringthe maximum voluntary bite force and the restposition. Maximum mouth opening was also verified.The measurements were recorded at four specifictimes: using the old prosthesis (T0), right after thenew prosthesis installation (T1), two weeks (T2) andfour weeks (T4) after installing the new prosthesis.All the RPDs were made by an experienced dentistand the same laboratory. Data were statisticallyanalyzed by ANOVA and Tukey tests (? = 0.05).Results: EMG values had high standard deviation atthe time T0. Generally, the mean values decreasedafter new prosthesis installation, especially aftertwo weeks from the installation (T2). During therest position, the left masseter and left temporalismuscles showed statistically significant gradualdecrease in their activities over time. Conclusion:New prostheses have positive effect on the patient’smuscular activity. However, an adaptation period ofthe muscle fibers to the new prosthesis is needed.KeywordsElectromyographic activity; Dental occlusion; Masseter; Removable partial dentures; Temporalis.
Conservative esthetic treatment of a discoloured calcified permanent tooth: five-year clinical evaluation
Authors: Ramos Thaysa Monteiro , Ramos Oliveira Thayanne Monteiro , Azevedo Cynthia Soares de , Gois Diego Noronha de , Oliveira Alaíde Hermínia de Aguiar , Freitas Patricia Moreira de
Published: May 2015

Objective: Pulp calcification can compromise toothcolor and negatively affect esthetics. Definitivetreatment for discolored anterior teeth withcalcification is usually provided by endodontictreatment with the use of internal and externalbleaching agents, as necessary. This article presentsthe conservative management of a vital tooth withan obliterated pulp chamber that led to changes intooth color. The benefits and limitations of the use ofin-office and home supervised bleaching techniquesare discussed.KeywordsTooth bleaching; Dental pulp calcification.
Surface roughness of indirect composites using different polishing systems
Authors: Barcellos Daphne Camara , Borges Alexandre Luiz Souto , Borges Alessandra Buhler , Pleffken Patricia Rondon , Rode Sigmar Mello
Published: May 2015

Objective: The aim of this study was to evaluatethe surface roughness of indirect composites afterpolishing with aluminum oxide (Al2O3) discs. Materialand Methods: One-hundred and eighty specimenswere confectioned with 6 indirect composites using aprefabricated matrix, resulting in six groups (n-30):Group SO - Solidex, Group SI - Signum, Group SF- Sinfony, Group OP - Opallis; Group RE - Resilab,Group EP - Epricord, Group AD - Adoro. Each groupwas divided into three subgroups according to thepolishing (n-10): Subgroup C (Control) - withoutpolishing (polyester strip); Subgroup S - polishingwith Sof-Lex discs; Subgroup T - polishing with TDVdiscs. The surface roughness was measured with aprofilometer. Results: The results were analyzed byANOVA and Tukey tests (5%), resulting in p = 0.00.The mean values (±standard-deviation) measured inRa (?m) for each Group/Subgroup were: RE/C - 0.14(± 0.14) a; EP/C - 0.18 (± 0.46) ab; SO/C - 0.24 (±0.22) abc; SF/S - 0.24 (± 0.17) abc; SF/C - 0.26 (±2.54)abc; SI/C - 0.30 (± 0.34)abcd; SO/T - 0.33(±0.42) abcd; AD/S - 0.34(± 0.88)abcd; AD/C - 0.37(±0.60)ab; SI/S - 0.37(± 1.39)bcd; SO/S - 0.43(± 0.26)cd; EP/S – 0.44 (± 1.02) cd; RE/S - 0.54(±2.02) de;SI/T - 0.65(± 0.88)ef; RE/T - 0.83 (± 0.54) fg; SF/T- 0.85 (± 0.21) fg; AD/T - 0.88 (± 1.74) fg; EP/T- 0.91(± 0.89) g. Conclusion: It is concluded thatpolyester strip resulted in significantly lowest surfaceroughness; polishing with TDV discs resulted insignificantly higher surface roughness compared toSof-Lex discs and that the surface roughness resultsdepend on the composite tested.KeywordsComposite resins; Dental polishing; Biofilms.
Ultimate tensile strength and microhardness of glass ionomer materials
Authors: Perondi Paula Roberta , Oliveira Pedro Henrique Cabral , Cassoni Alessandra , Reis André Figueiredo , Rodrigues José Augusto
Published: May 2015

Objective: This study evaluated the ultimate tensile strength (UTS) and microhardness (µKH) of conventional (CO) and hybrid resin-modified glass ionomer (RM). Material and methods: Nine specimens to UTS and twelve for µKHN of glass ionomer materials were obtained using special molds. The materials were manipulated and CO groups were allowed to self-cure for five minutes and RM were subjected to light-activation as indicated by manufactures through a glass slide. All specimens were dark-stored in 100% relative humidity for 24h. For UTS test, specimens were tested in tension in a universal testing machine (crosshead speed of 1 mm/min) until failure. For µKHN test a Knoop diamond indenter was used to make five indentations in the upper/light irradiated surface of the specimens. UTS and µKHN data were submitted to one-way ANOVA, followed by Tukey’s test (?= 5%).  Results: The results for UTS were: Ionomaster: 7.0 (±1.6)A; Maxxion R: 8.8 (±3.7)A Vidrion R: 8.8 (±3.9)A; ChemFil Rock: 10.7 (±4.6)AB; Vitremer: 13.1 (±3.3)BC; Vitrofil R: 14.9 (±7.8)CD; Ionoseal: 14.5 (±8.2)CD; Resiglass: 16.3 (±2.3)D. The results for µKH: Ionomaster: 24.3 (±6.6)B; Maxxion R: 17.7 (±4.7)A, Vidrion R: 31.0 (±9.4) B; ChemFil Rock: 31.1 (±8.5)B; Vitremer: 20.3 (±3.3)A; Vitrofil R: 16.5 (±5.1)A; Ionoseal: 13.1 (±8.5)A; Resiglass: 21.6 (±5.2)A. Conclusion: It was observed that the hybrid resin-modified ionomers generally have higher cohesive strength than conventional ones, but lower microhardness.
Atraumatic restorative treatment in Brazilian schoolchildren: 12 months preliminary clinical results
Authors: Sacramento Patrícia Almada , Borges Ana Flávia Sanches , Rodrigues Raphaela Farias , Puppin-Rontani Regina Maria
Published: May 2015

Objective: To evaluate the clinical efficacy between two GICs, Fuji IX (GC Int. Corp.) and Ketac Molar (3M ESPE), used in Atraumatic Restorative Treatments (ART).Materials and Methods: A total of 82 children age between 6 and 9 years old are included in this study. The materials criteria application followed the “split mouth” design, 71 restorations and 98 sealants were carried out with the Fuji IX in the left hemi arches and 70 restorations and 99 sealants were carried out with the Ketac Molar in the right hemi arches. The procedures were conducted in a school that did not have any dentistry equipment. Previously to the restorative procedure, the children were supervised during tooth brushing. A trained dentist carried out all the restorations and sealants at the school playground with natural light and the teeth were isolated with cotton rolls. The performance of the restorations and sealants was evaluated for visual inspection in a 12 month preliminary follow up by one blinded trained examiner.Results: No significant difference was shown between the success rate of the GICs Fuji IX and Ketac Molar for the restorations (p>0.05) and sealants (p>0.05). Regardless of the material, the success rates were 82% for the sealants, 76% for the class I and 73% for the class II restorations.Conclusion: The Atraumatic Restorative Treatment preliminary results provided curative and preventive treatments for patients who do not have access to conventional treatment.
4th Interdisciplinary Congress of Temporomandibular Dysfunction and Orofacial Pain
Authors: Rampani Marta Solange , Oliveira Wagner de , Rode Sigmar de Melo
Published: May 2015

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Prevalence of oral lesions in elderly patients on oral cancer prevention campaigns in Parana state Brazil 1989-2013.
Authors: Sassi Laurindo Moacir , Patussi Cleverson , Ramos Gyl Henrique A. , Bixofis Regiane Benez , Schussel Juliana Lucena , Guebur Maria Isabela
Published: May 2015

Objective: recently, there has been a rapid aging process of the world population. Despite of a longer permanence of natural teeth and a reduction of oral diseases caused by the improvement of life conditions and the provision of health care, the prevalence of oral diseases in the elderly is still considered significant. Therefore, the aim of this study is to evaluate the epidemiological profile of elderly patients (above 60 years old) attended in 25 years of campaigns oral cancer prevention in the Paraná state, Brazil, between 1989 and 2013. Material and Methods: Patients, volunteers, were evaluated during 25 years of oral cancer prevention by the campaign team and all patients were evaluated in a methodical way with inspection of all intra-oral areas. Results: a total of 22.909 patients were attended during the 25 years of projects. Of these, 6.134 were older than 60 years old, with appearance of 1.523 oral lesions during the examination and 4.611 patients had no oral alterations during the dentist evaluation, among those were found injuries by traumatic origin, inflammatory lesions and others types of injury. Conclusion: it is clear the necessity for specialized care and active surveillance of these patients, since it is a consensus in the literature that the best treatment is early diagnosis. It is also necessary the development of epidemiological studies of the elderly population, which are scarce and difficult to elaboration of plans for effective action to meet the specific demands of this age group. Key words: oral cancer, Oral Examination, Oral Health, elderly cancer.
Assessment of dental implant site dimensions in cone beam computed tomography systems
Authors: Shokri Abbas , Khajeh Samira , Falah-kooshki Sepideh , Ostovarrad Farzaneh , Karimi Atena , Khavid Atefeh
Published: May 2015

Objective: The aim was to investigate the accuracy of linear measurements the mandibular ridge recorded using two CBCT systems. Materials and Methods: Eleven human dry skull were used in which mandibles were chosen to measure width and height in 6 sites. Before scanning, the points were marked using barium sulfate radiopaque contrast media. Mandible imaging was done using two systems: Newtom3G and Cranex3D. Alveolar ridge dimensions were recorded by two observers under uniform condition using special software for each system. The measurement errors and inter-examiner reliability were calculated for each modality and compared with each other and analyzed via SPSS software version 18. The level of significance was set at P< 0.05. Results: The overall mean absolute error was 0.08 mm for Cranex system and 0.5 for Newtom system. The mean absolute error of two systems had no statistically significant difference in comparison with each other or with the gold standard. The statistical analysis showed high inter-observer reliability (P < 0.05). Conclusion: CBCT is highly accurate and reproducible in linear measurements in the axial and coronal images planes and in different areas of the maxillofacial region.Keywords: Barium sulfate; Cranex3D; Cone beam computed tomography; Dental implant; Newtom3G.
Evaluation of stabilizing plate therapeutic effects of different types of temporomandibular disorders - painful evolution of patients treated in a reference center
Authors: Cordeiro Patricia Cataldo de Felipe , Bonato Letícia Ladeira , Dias Isabela Maddalena , Guimarães Josemar Parreira
Published: May 2015

Objective: Evaluation of the symptomatic outcome of patients of various types of TMD treated exclusively with stabilizing plate for a period of three months patients comparing painful muscle and joint symptoms , and clinical aspects , both before and after treatment periods . Material and methods: A retrospective study of medical records of 628 rescue the last ten years (2004-2013 ) of subjects treated at the Serviço de Diagnóstico e Orientação a pacientes com Desordem Temporomandibular (Serviço ATM), Faculty of Dentistry/UFJF. The sample was divided into subgroups distinct diagnoses, in which the evaluation of symptomatic progression of patients through the analysis of pain scores, measuring the amplitude of mouth opening and the presence of joint sounds was performed. Data were obtained in early stages and after treatment with stabilizing plate. Results: The group of individuals diagnosed with muscular disorder (47.45% ) and those with multiple diagnoses ( 3.34 % ) had a higher prevalence of chronic orofacial pain ( 90.26 % and 95.23 % ) . The remission of painful symptoms was visible in groups accompanied by increased amplitude of mouth opening. Additional way, we obtained reduction joint sounds in patients with intracapsular and degenerative disorders, respectively. Conclusion: The stabilizing plate has shown efficacy in various types of temporomandibular disorders evaluated. However, in an attempt to encompass all  etiological factors in therapy, emphasizes the importance of multidisciplinary therapies for the treatment of temporomandibular disorders.