Artigos Científicos - FOUFPA/ICS

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Percepção de mulheres em situação de violência sobre o suporte e apoio recebido em seu contexto social
(Universidade Federal do Pará, 2010-09) NASCIMENTO, Liliane Silva do; NAKANO, Ana Marcia Spano; VIANA, Angelina Lettiere
We seek to identify the perceptions of women in situations of violence concerning the support and assistance received in its social context, particularly, the institutionalized resources to combat violence against women. A descriptive exploratory qualitative approach was developed at the Institute of Forensic Medicine in Ribeirão Preto, Brazil. We interviewed 57 women victims of aggravated assault domestic violence and analyzed the results thematically. The search for help occurs in its own social environment, together with family and friends. The use of health services depends on the perception of the severity of the condition and does not always result in adequate responses to these women's demands. In justice, the reality of helplessness and disbelief points to dislocation and failure of available social support institutions for victims. For integral and humanized care, the actions should go beyond the protocols of action, thinking of prevention and reduced violence strategies.
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Oral health assessment in school program health: who and how?
(Universidade Federal do Pará, 2018-06) OLIVEIRA, Erick Ely Gomes de; ARANTES, Diandra Costa; NASCIMENTO, Liliane Silva do; PONTES, Flávia Sirotheau Corrêa
Oral health is a constitutional right, with its own national policy which guides the relevance of its interrelation to general health within the integrality principles. This manuscript aims at understanding how oral health assessment and actions are observed within the School Program Health, through a qualitative study performed in the city of Belém, State of Pará, Brazil. The sample criterion consisted of 5 nurses, 5 teachers and 5 parents. A semi-structured script was used, written and transcribed with subsequent thematic analysis. The analysis revealed three thematic categories emphasizing the need for policy empowerment and practice in order to understand the meanings of oral health within the SHP as well as to enlarge its specificity in the interdisciplinary work scenario. Thus, it is clear that for the effective functioning of the school / health relationship, it is of utmost importance that SHP policy is applied and recognized while continuously seeking to strengthen the principle of integrality and extended clinic. The study also highlights permanent education and constant need for the participants’ skill improvement so that both students’ health care and life quality can be fully promoted.
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Utilização da tomografia computadorizada para o diagnóstico da articulação temporomandibular
(Universidade Federal do Pará, 2014-12) SILVEIRA, Olívia dos Santos; SILVA, Fernanda Cristina Santos; TUJI, Fabrício Mesquita; SERAIDARIAN, Paulo Isaias; MANZI, Flávio Ricardo; ALMEIDA, Carlos Eduardo Neves de
The computed tomography plays an important role in the diagnosis of anomalies and pathological conditions of the TMJ, providing a complete visualization of joint region, providing a more accurate diagnosis. For evaluation of the images is necessary to the professional the knowledge of sectional anatomy of the joint region, so he can recognize the structural changes. Therefore, it was explained and described in this study the characteristics of normal CT, morphological and pathological conditions commonly found in the region of the temporomandibular joint. The Computed tomography is an imaging exam superior than the conventional imaging exam for TMJ, because it allows an adequate and accurate three-dimensional visualization of all details of the bone, without the limitation of overlap, providing the real size and shape of the anatomical structures, morphological changes and pathological conditions.
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Relationship among local and functional factors in the development of denture stomatitis in denture wearers in northern Brazil
(Universidade Federal do Pará, 2014-10) GAUCH, Lurdete Maria Rocha; GOMES, Fabíola Silveira; PEDROSA, Simone Soares; ESTEVES, Renata Antunes; SILVA, Silvia Helena Marques da
Objective: The aim of this study was to evaluate the relationship among functional and qualitative factors in the development of denture stomatitis (DS) (according to Newton’s classification) in acrylic-based denture wearers residents from northern Brazil. Material and method: A total of 99 patients who wore partial or total acrylic resin-based upper dentures were included in this study. The subjects completed an epidemiological data form that includes the patient’s gender, age, local factors (hygiene habits, remove denture to sleep, use of mouthwash, present condition of the denture, age of the denture) and functional factors (vertical dimension at rest, vertical dimension of occlusion, occlusion, retention, and static and dynamic stability). To detect yeasts, samples were collected from the inner surface of the dentures and from the palatal mucosa in contact with it. Subsequently, the samples were cultured on Sabouraud dextrose agar, observing macro and microscopic characteristics. Result: In the present study, we did not find any significant relationship between the gender and disease onset. Based on the Newton classification, 36.3% of the patients presented with DS and 89.0% were colonized by yeasts; of these subjects, 50% had type I lesions, 33.3% had type II lesions, and 16.6% had type III lesions. All of the qualitative and local factors, except the use of mouthwash, were clinically relevant to the development of disease. Conclusion: Denture stomatitis in denture users in northern Brazil was multifactorial, involving local, functional and microbiological factors.
Acesso aberto (Open Access)
Analysis of the mental foramen using cone beam computerized tomography
(Universidade Federal do Pará, 2015-08) SAITO, Kunihiro; ARAÚJO, Ney Soares de; SAITO, Miki Taketomi; PINHEIRO, João de Jesus Viana; CARVALHO, Pedro Luiz de
Introduction: Knowledge of the anatomical structures located in the region between the mental foramina is of critical importance in pre-operative planning. Objective: To evaluate the position of the mental foramen relative to the apices of the teeth and the distance to the edges of the mandible, using cone beam computerized tomography. Material and method: One hundred cone beam computerized tomographs of the mandible were evaluated; the tomographs were taken using a single tomographic device. Each image chosen was evaluated repeatedly from both sides of the mandible, the position of the mental foramen, indicating the region in which the foramen was found and the measures of the mental foramen, the lingual cortex and the mandibular base. Initially, the data were analyzed descriptively. A value of p<0.05 was chosen as the level of significance. Result: Forty-two percent of the mental foramina were located in the apex of the second pre-molar. The lingual margin of the mental foramen was located, on average, 3.1mm from the lingual cortex. The lower margin of the mental foramen was located 7.25 mm above the lower edge of the mandible. Conclusion: The mental foramen was located more frequently at a level of the apices of the second pre-molars, with a distance to the lingual cortex, on average, of 3.1mm and to the base of the mandible, on average, of 7.25 mm.
Acesso aberto (Open Access)
Factors influencing orthodontic treatment time for non-surgical Class III malocclusion
(Universidade Federal do Pará, 2016-10) BICHARA, Lívia Monteiro; ARAGÓN, Mônica Lídia Castro de; BRANDÃO, Gustavo Antônio Martins; NORMANDO, Antonio David Corrêa
To improve orthodontic treatment efficiency, orthodontists must know which variables could interfere with orthodontic treatment time. Objective: To identify variables and their effect size on orthodontic treatment time of Class III malocclusion. Material and Methods: Forty-five Class III malocclusion cases were selected from 2008 patients’ records. Clinical charts, cephalometric radiographs, and pre and posttreatment dental casts were evaluated. Age, sex, PAR index at T1 and T2, overjet, missing teeth, extractions, number of treatment phases, missed appointments, appliance breakages, and cephalometric variables SNA, SNB, ANB, Wits, SnGoGn, CoA, CoGn, IMPA, 1.PP were investigated by multiple linear regression analysis and stepwise method at p<0.05. The sample was also divided into two groups: Group 0-2 (patients who had missed two clinical appointments or less) and Group >2 (patients who missed more than 2 appointments), to detect the influence of this data on treatment time and the quality of the treatment (PAR T2). Results: Average treatment time was 30.27 months. Multiple regression analysis showed that missed appointment (R2=0.4345) and appliance breakages (R2=0.0596) are the only variables able to significantly predict treatment duration. Treatment time for patients who missed more than 2 appointments was nearly one year longer. However, no significant influence on PAR T2 was observed for those patients. Conclusion: Orthodontic treatment duration in Class III patients is mainly influenced by factors related to patient compliance. Patients who missed more appointments did not show worse orthodontic finishing, but longer treatment. No occlusal, cephalometric, or demographic variable obtained before treatment was able to give some significant prediction about treatment time in Class III patients.
Acesso aberto (Open Access)
Randomized clinical trial of the effect of NovaMin and CPP-ACPF in combination with dental bleaching
(Universidade Federal do Pará, 2017-06) ALEXANDRINO, Larissa Dias; ALENCAR, Cristiane de Melo; SILVEIRA, Ana Daniela Silva da; ALVES, Eliane Bemerguy; SILVA, Cecy Martins
Objective This randomized, controlled, double-blind clinical study evaluated the effect of calcium sodium phosphosilicate (NovaMin) and casein phosphopeptide-amorphous calcium phosphate with fluoride (CPP-ACPF) on the prevention of post-operative sensitivity and on the effects of clinical bleaching treatment. Material and Methods Sixty volunteers were selected according to inclusion and exclusion criteria and were randomly assigned into three groups (n=20): CG (control group) patients, who were treated with 35% hydrogen peroxide; NOVAG (NovaMin group) patients, who were treated with 35% hydrogen peroxide followed by the application of NovaMin; and CPPG (CPP group) patients, who were treated with 35% hydrogen peroxide followed by the application of CPP-ACPF. Both bioactive agents were applied for five minutes. An evaporative stimulus associated with a modified visual scale was used to analyze sensitivity 24 hours after each bleaching session. The color evaluation was performed on the maxillary central incisors using a spectrophotometer. Associations between the intervention group, bleaching session, and reported sensitivity were tested using Chi-square partitioning. Results Color change values (ΔE) were analyzed using analysis of variance (ANOVA). The significance level used for both tests was 5%. In the intragroup assessment, the Friedman test showed that only the CPP-ACPF group showed no statistically significant difference (p<0.05) between baseline and first bleaching session. In the intergroup assessment, the Kruskal–Wallis test showed that the CPPG had less postoperative sensitivity after the first session, when compared to the other groups (p<0.05). Color change analysis (ΔE) showed a significant difference between the means obtained in the different bleaching sessions in all groups (p<0.05). Conclusions This study showed that the combination of CPP-ACPF with 35% hydrogen peroxide significantly reduced post-operative sensitivity in the first session, compared with the other evaluated treatments. The association of CPP-ACPF and NovaMin did not affect the color change induced by tooth bleaching.
Acesso aberto (Open Access)
Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment
(Universidade Federal do Pará, 2015-06) MAUAD, Bruno Aldo; SILVA, Robson Costa; ARAGÓN, Mônica Lídia Castro de; PONTES, Luana Farias; SILVA JÚNIOR, Newton Guerreiro da; NORMANDO, Antonio David Corrêa
Objective: The aim of this longitudinal study, comprising young adults without orthodontic treatment, was to assess spontaneous changes in lower dental arch alignment and dimensions. Methods: Twenty pairs of dental casts of the lower arch, obtained at different time intervals, were compared. Dental casts obtained at T1 (mean age = 20.25) and T2 (mean age = 31.2) were compared by means of paired t-test (p < 0.05). Results: There was significant reduction in arch dimensions: 0.43 mm for intercanine (p = 0.0089) and intermolar (p = 0.022) widths, and 1.28 mm for diagonal arch length (p < 0.001). There was a mild increase of approximately 1 mm in the irregularity index used to assess anterior alignment (p < 0.001). However, regression analysis showed that changes in the irregularity index revealed no statistically significant association with changes in the dental arch dimensions (p > 0.05). Furthermore, incisors irregularity at T2 could not be predicted due to the severity of this variable at T1 (p = 0.5051). Conclusion: Findings suggest that post-growth maturation of the lower dental arch leads to a reduction of dental arch dimensions as well as to a mild, yet significant, increase in dental crowding, even in individuals without orthodontic treatment. Furthermore, dental alignment in the third decade of life cannot be predicted based on the severity of dental crowding at the end of the second decade of life
Acesso aberto (Open Access)
Alterations in plaque accumulation and gingival inflammation promoted by treatment with self-ligating and conventional orthodontic brackets
(Universidade Federal do Pará, 2015-04) CARDOSO, Mauricio de Almeida; SARAIVA, Patrícia Pinto; BRANGELI, Liliana Ávila Maltagliati; RHODEN, Fernando Kleinübing; COSTA, Carla Cristina Alvarenga ; NORMANDO, Antonio David Corrêa; CAPELOZZA FILHO, Leopoldino
Objective: The aim of the present study was to evaluate, comparatively, the periodontal response during orthodontic treatment performed with self-ligating and conventional brackets.Methods: Sixteen Caucasian individuals of both sexes, aged between 12 and 16 years old and in permanent dentition were selected. Eight individuals were treated with conventional brackets installed on the lower dental arch and self-ligating brackets on the upper arch. Another eight individuals received self-ligating brackets in the lower arch and conventional brackets in the upper arch. The subjects received material and instructions for oral hygiene. Visible plaque index (VPI), gingival bleeding index (GBI) and clinical attachment level (CAL) were evaluated just after installation of orthodontic appliances, and 30, 60 and 180 days later. Mann-Whitney test was used to compare differences between groups (self-ligating and conventional), twoway ANOVA followed by Tukey’s test was used to assess CAL at each site of each tooth. Significance level was set at 5%. Results: No significant changes were found with regard to the assessed parameters (VPI, GBI and CAL) in either one of the systems.Conclusion: No significant changes were found with regard to the periodontal response to orthodontic treatment for the variables assessed and between subjects receiving passive self-ligating and conventional brackets. All individuals had received oral hygiene instructions and had their periodontal conditions monitored.
Acesso aberto (Open Access)
Deflection test evaluation of different lots of the same nickel-titanium wire commercial brand
(Universidade Federal do Pará, 2016-02) NEVES, Murilo Gaby; LIMA, Fabrício Viana Pereira; GURGEL, Júlio de Araújo; VERCELINO, Célia Regina Maio Pinzan; REZENDE, Fernanda Soares; BRANDÃO, Gustavo Antônio Martins
Introduction: The aim of this in vitro study was to compare the elastic properties of the load-deflection ratio of orthodontic wires of different lot numbers and the same commercial brand. Methods: A total of 40 nickel-titanium (NiTi) wire segments (Morelli OrtodontiaTM - Sorocaba, SP, Brazil), 0.016-in in diameter were used. Groups were sorted according to lot numbers (lots 1, 2, 3 and 4). 28-mm length segments from the straight portion (ends) of archwires were used. Deflection tests were performed in an EMIC universal testing machine with 5-N load cell at 1 mm/minute speed. Force at deactivation was recorded at 0.5, 1, 2 and 3 mm deflection. Analysis of variance (ANOVA) was used to compare differences between group means. Results: When comparing the force of groups at the same deflection (3, 2 and 1 mm), during deactivation, no statistical differences were found. Conclusion: There are no changes in the elastic properties of different lots of the same commercial brand; thus, the use of different lots of the orthodontic wires used in this research does not compromise the final outcomes of the load-deflection ratio.
Acesso aberto (Open Access)
Cleansing orthodontic brackets with air-powder polishing: effects on frictional force and degree of debris
(Universidade Federal do Pará, 2016-08) LEITE, Brisa dos Santos; FAGUNDES, Nathália Carolina Fernandes; ARAGÓN, Mônica Lídia Castro de; DIAS, Carmen Gilda Barroso Tavares; NORMANDO, Antonio David Corrêa
Introduction: Debris buildup on the bracket-wire interface can influence friction. Cleansing brackets with air-powder polishing can affect this process. Objective: The aim of this study was to evaluate the frictional force and amount of debris remaining on orthodontic brackets subjected to prophylaxis with air-powder polishing. Methods: Frictional force and debris buildup on the surface of 28 premolar brackets were evaluated after orthodontic treatment. In one hemiarch, each bracket was subjected to air-powder polishing (n = 14) for five seconds, while the contralateral hemiarch (n = 14) served as control. Mechanical friction tests were performed and images of the polished bracket surfaces and control surfaces were examined. Wilcoxon test was applied for comparative analysis between hemiarches at p < 0.05. Results: Brackets that had been cleaned with air-powder polishing showed lower friction (median = 1.27 N) when compared to the control surfaces (median = 4.52 N) (p < 0.01). Image analysis showed that the control group exhibited greater debris buildup (median = 2.0) compared with the group that received prophylaxis with air-powder polishing (median = 0.5) (p < 0.05). Conclusion: Cleansing orthodontic brackets with air-powder polishing significantly reduces debris buildup on the bracket surface while decreasing friction levels observed during sliding mechanics.
Acesso aberto (Open Access)
Color changes of esthetic orthodontic ligatures evaluated by orthodontists and patients: a clinical study
(Universidade Federal do Pará, 2016-10) KAWABATA, Edilene; DANTAS, Vera Lucia; KATO, Carlos Brito; NORMANDO, Antonio David Corrêa
Objective: To evaluate in vivo changes in the color of esthetic elastomeric ligatures from different manufacturers. Methods: Four widely used commercial brands of elastomeric ligatures were selected and used in 20 adult patients in a splitmouth design. The ligatures were evaluated by orthodontists and patients in a double-blind manner on the day the ligatures were placed (T0 ) and 30 days after intraoral exposure (T1 ) by means of a system of staining scores. Groups were compared by Friedman test with p < 0.05. Results: Orthodontists and patients reported similar staining scores (p > 0.05). Results showed that all brands underwent significant staining when exposed to the intraoral environment. Modularcrystal MorelliTM (Sorocaba, SP, Brazil) showed the highest degree of staining with the median reaching the maximum value (3); while the other brands (3M UnitekTM, American OrthodonticsTM and GAC DentsplyTM) showed the median equal to 1 (p < 0.001). A large individual variability in the degree of staining was also found for all brands. Conclusions: All four brands of esthetic ligatures showed significant staining, which appeared to be more pronounced for the MorelliTM brand. Changes in color of the elastomeric ligatures were perceived similarly by patients and orthodontists. The industry needs to improve the color stability of esthetic ligatures.
Acesso aberto (Open Access)
Air-powder polishing on self-ligating brackets after clinical use: effects on debris levels
(Universidade Federal do Pará, 2016-10) ARAGÓN, Mônica Lídia Castro de; LIMA, Leandro Santiago; NORMANDO, Antonio David Corrêa
Introduction: Debris buildup on brackets and arch surfaces is one of the main factors that can influence the intensity of friction between bracket and orthodontic wire. Objective: This study sought to evaluate the effect of air-powder polishing cleaning on debris levels of self-ligating ceramic brackets at the end of orthodontic treatment, compared to the behavior of conventional brackets. Methods: Debris levels were evaluated in metal conventional orthodontic brackets (n = 42) and ceramic self-ligating brackets (n = 42) on canines and premolars, arranged in pairs. There were brackets with and without air-powder polishing. At the end of orthodontic treatment, a hemiarch served as control and the contralateral hemiarch underwent prophylaxis with air-powder polishing. Debris buildup in bracket slots was assessed through images, and Wilcoxon test was used to analyze the results. Results: The median debris levels were statistically lower in the conventional metal brackets compared to self-ligating ones (p = 0.02), regarding brackets not submitted to air-powder polishing. Polishing significantly reduced debris buildup to zero in both systems, without differences between groups. Conclusions: Ceramic self-ligating brackets have a higher debris buildup in comparison to conventional metal brackets in vivo, but prophylaxis with sodium bicarbonate jet was effective in reducing debris levels in self-ligating and also in conventional brackets.
Acesso aberto (Open Access)
Avaliação das ações de saúde bucal no Programa Saúde da Família no distrito de Mosqueiro, Pará
(Universidade Federal do Pará, 2008-02) EMMI, Danielle Tupinambá; BARROSO, Regina Fátima Feio
The extension of Brazil's Family Health Program Teams through the introduction of Oral Health Teams (OHT) as required by Decree N° 1,444 dated December 28, 2000, was an important step in the restructuring of the Oral Healthcare System, ensuring easier access to good quality dental care and treatment for less privileged segments of the population. In the Mosqueiro district of Pará State, an Oral Health Team was added to the Family Health Program in 2002, working closely with the local community through home calls and school visits, as well as at the Family Health Unit. In order to assess these Oral Health activities, 103 users of the Family Health Program Unit responded to a questionnaire with closed and semi-open questions in July 2004. The resulting data were tabulated, showing that most of these users were young adult women with high school diplomas but lacking access to higher education. This public felt that Oral Health quality had improved considerably, being satisfied with the performance of the current team.
Acesso aberto (Open Access)
Survival analysis of banding and bonding molar tubes in adult patients over a 12-month period: a split-mouth randomized clinical trial
(Universidade Federal do Pará, 2016) OEIRAS, Valéria Jacques; SILVA, Valéria Assis Almeida e; AZEVEDO, Leidiana Aguiar; LOBATO, Vanessa Soares; NORMANDO, Antonio David Corrêa
This split-mouth randomized clinical trial aimed to compare the survival rate of bonding and banding molar tubes in adult orthodontic patients. Eligibility criteria included adults (aged >18 years), no active caries, restorations, or fractures in the upper and lower molars. The main outcome was any type of first-time failure in molar tubes. A computer-generated randomization scheme was used in a 1:1 ratio. The survival rate was estimated for 32 adult patients, in whom a tube was bonded to a molar tooth using composite resin on one side and a band was cemented with glass ionomer onto the same tooth in the contralateral arch. A total of 59 banded and 59 bonded molars were followed up for 12 months. Blinding was not applicable. Survival analysis including Cox regression was used at p < 0.05. The survival rate of bonded molars was not statistically different from that of banded molars (log-rank test, p = 0.97). Hazard ratio (HR) was 0.72 (95%CI, 0.38-1.31). Bonded upper molars yielded a survival rate of 81.25% (26 out of 32) compared to 71.87% (23 out of 32) for banded upper molars. The survival rate was 66.66% (18 out of 27) for banded lower molars and 59.25% for bonded lower molars (16 out of 27). The HR for lower vs. upper arch was 2.16 (95%CI, 1.18-3.98). No serious problem was observed other than gingivitis associated with plaque accumulation. In contrast to previous studies in young patients, in adults, bonding orthodontic tubes to molars is similar to molar banding. However, both procedures had a high failure rate in the lower arch.
Acesso aberto (Open Access)
Odontalgia associada a variáveis socioeconômicas, psicossociais e saúde bucal
(Universidade Federal do Pará, 2012-12) FERREIRA, Luale Leão; BRANDÃO, Gustavo Antônio Martins; GARCIA, Gustavo; COSTA, Ludmila da Silva Tavares; POSSOBON, Rosana de Fátima
BACKGROUND AND OBJECTIVES: Knowing factors associated with dental pain is important to provide adequate intervention and attention to this major health care problem. This study aimed at understanding the prevalence of dental pain as reason for the most recent dental appointment among 15-year old adolescents and at checking its association with socioeconomic factors, behavioral variables and oral health. METHOD: The probabilistic sample was made up of 592 students of 10 state schools. Dental pain variable was evaluated by questionnaires applied at the school. Clinical oral exam was performed according to World Health Organization’s criteria and remaining variables were investigated by self-applicable questionnaires. Data were classified by the Excel program and Odds Ratio was used to associate variables. RESULTS: From 592 participants, 33.44% have reported dental pain as reason for their most recent dental appointment. After statistical analysis, dental pain was associated with low income (p = 0.04), higher number of people living in the same home (p < 0.01), low frequency of daily tooth brushing (p = 0.01), long interval between dental appointments (p < 0.001), longer time elapsed since last dental appointment (p < 0.001), dental anxiety (p < 0.01), consumption of cariogenic food (p = 0.03), high dental caries experience (p < 0.01) and with the presence of untreated dental caries (p < 0.001). CONCLUSION: Dental pain is related to dental caries experience and activity and to socioeconomic and psychosocial factors, showing the need for further attention to these conditions. Keywords: Adolescent’s behavior, Dental pain, Oral health, Social conditions.
Acesso aberto (Open Access)
Avaliação do conhecimento em odontologia e educação física acerca dos protetores bucais
(Universidade Federal do Pará, 2009-08) SIZO, Sérgio Rodrigues; SILVA, Edilson Santos da; ROCHA, Max Pinto da Costa da; KLAUTAU, Eliza Burlamaqui
This study had the aim to assess the level of knowledge of 150 Odontology and Physical Education undergraduation students concerning mouth guards in the city of Belém, Brazil. Besides that, we tried to provide further information to these future professionals through speeches and distribution of folders in which the main focus was the mouth guards, their indications, types as well as hygienization and storage. The participants in the research were in the last year of their specific undergraduation courses. The analysis of the results showed that 68% of the interviewed students still do not have suitable information on the mouth guards, but despite of that, in their majority they are aware of the risks many athletes face in sports which have physical impact. The authors believe the spread of the information on the use of mouth guards in sportive practice is relevant and aims to prevent trauma and promote health of general population.
Acesso aberto (Open Access)
Estudo morfológico do efeito radioprotetor da vitamina E (dl-alfa-tocoferil) na reparação tecidual em ratos
(2003-12) MANZI, Flávio Ricardo; BÓSCOLO, Frab Norberto; ALMEIDA, Solange Maria de; TUJI, Fabrício Mesquita
The purpose of this work was to evaluate the action of the vitamin E as a radioprotective agent in the process of tissue reparation in rats submitted to a surgical procedure, which consisted of a wound done in the fore dorsal area. The animals were divided into five groups: group C (controls) - wound; group VE - previous treatment with vitamin E (90 UI); group IR - wound and irradiation of the borders three days after surgery; group VEIR - previous treatment with 90 UI of the vitamin E and irradiation of the borders three days after the surgery; group OIR - previous treatment with olive oil and irradiation of the borders three days after surgery. The radioprotective effect of the vitamin E was evaluated using hematoxylin-eosin stained specimens in order to identify granulation tissue, at 4, 7, 14 and 21 days after the surgical procedures. The results showed that 6 Gy of electron irradiation with a beam of 6 MeV caused retardation of the tissue repairing process and that vitamin E was effective as a radioprotective agent.
Acesso aberto (Open Access)
Influence of bioactive materials used on the dentin surface whitened with carbamide peroxide 16%
(2010-06) PINHEIRO, Helena Burlamaqui; LOPES, Bruno; KLAUTAU, Eliza Burlamaqui; CARDOSO, Jomara; SILVA, Bruna Rozzetti; CARDOSO, Paulo Eduardo Capel
This study investigated the influence of bioactive materials on the dentin surface whitened. MATERIAL AND METHODS: Three bovine teeth were shaped into three dentin wafers. Each wafer was then sectioned, into six dentin slices. One slice from each tooth was distributed into one of 6 groups: 1.CG = control group (distilled water); 2.WT = whitening treatment; 3.WT + MI Paste Plus, applied once a day; 4.WT + Relief ACP30, applied once a day for 30 mintes; 5.WT + Relief ACP60, applied once a day for 60 minutes; 6.WT + Biosilicate®, applied once a week. All groups were treated over 14 days. RESULTS: CG presented all dentinal tubules occluded by smear layer; WT group was observed all dentinal tubules opened. In the groups 3, 4 and 6, tubules were occluded. Group 5, dentinal tubules were completely occluded by mineral deposits. CONCLUSION: The use of bioactive materials immediately after whitening treatment can reduce or even avoid the demineralization effect of whitening and avoid exposing dentinal tubules.
Acesso aberto (Open Access)
Clinical evaluation of multisurface ART restorations
(2005-03) CEFALY, Daniela Francisca Gigo; BARATA, Terezinha de Jesus Esteves; TAPETY, Celiane Mary Carneiro; BRESCIANI, Eduardo; NAVARRO, Maria Fidela de Lima
The aim of this study was to evaluate the performance of two different glass-ionomer cements: a high-density (Ketac Molar - ESPE) and a resin-modified cement (Fuji VIII – GC) using the Atraumatic Restorative Treatment technique to restore multisurface cavities in permanent teeth. A total of 60 ART restorations (30 with each material) were placed in schoolchildren (9-16 years of age) by two operators. After a period of 6 months, two independent examiners evaluated 59 restorations according to the criteria used in previous ART studies. Data were submitted to McNemar and Fischer tests. The success rate of the treatment was 98.3%. One restoration (Ketac Molar) was replaced by another material and was recorded as failure. The success rates of the restorations were 100% and 96.6% for Fuji VIII and Ketac Molar, respectively. There was no statistically significant difference in the restorations success between baseline and 6 months (p>0.05). In the same way, no significant differences were found between materials, cavity types or operators (p>0.05). The ART approach was highly appropriate and effective in restorations involving two or more tooth surfaces, after 6 months. The results showed a promising performance of the ART technique with both materials.