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1.
J Prosthet Dent ; 2020 Nov 26.
Artículo en Inglés | MEDLINE | ID: mdl-33250196

RESUMEN

STATEMENT OF PROBLEM: Biofilms can be retained on dental prostheses leading to the development of infections. The indiscriminate use of antifungal drugs can result in the development of microorganisms that are resistant to these antimicrobial agents. Whether probiotics are a suitable alternative for reducing the prevalence of oral candidiasis is unclear. PURPOSE: The purpose of this in vitro study was to evaluate the influence of 6 different live strains of probiotics and 2 commercially available probiotic supplements used for inhibiting the growth of Candida albicans biofilm in heat-polymerized acrylic resin denture base material and to determine whether biofilm byproducts modify the surface of specimens. MATERIAL AND METHODS: Biofilms of C. albicans were formed on acrylic resin specimens in the presence of probiotics and quantified by colony-forming units (CFUs), and the surface roughness (Ra) of the specimens was assessed before and after the formation of biofilms. The CFU and roughness data were analyzed by analysis of variance and the Tukey HSD test (α=.05). RESULTS: A significant decrease in the number (CFU/mL) of C. albicans cells was found when they were cultured with 4 probiotics: B. lactis (P=.045), B. longum (P<.001), L. casei (P<.001), and L. helveticus (P<.001) and with the commercially available probiotic Prolive (P=.05). The Ra of specimens decreased after exposure to different microbial biofilms (P≤.05) except in 3 experimental groups. CONCLUSIONS: In general, the tested probiotics had an antagonistic effect on the growth of C. albicans, and the surface of acrylic resin was altered after exposure to biofilm byproducts.

2.
J Adv Prosthodont ; 12(2): 55-60, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-32377317

RESUMEN

PURPOSE: The aim was to evaluate the effect of four acidic beverages on the roughness (Ra) and color change (ΔEab) of two brands of artificial teeth and a heat-polymerized acrylic resin (HPAR) for use in a prosthetic base. MATERIALS AND METHODS: All materials were divided into 5 groups, according to the used acidic beverage (artificial saliva - control, red wine, orange juice, coke-based, and lemon juice-based soft drink). The immersion process was divided into two stages: T1 - immersion in the acidic solutions for 10 minutes for 14 days; T2 - after T1, the samples were immersed in grape juice for 14 days. The Ra of the samples was evaluated in a rugosimeter and the ΔEab in a spectrophotometer, before and after the immersions. The analysis of variance of one (ΔEab) and two factors (Ra) and Tukey were performed (α=.05). RESULTS: There was a statistical difference for roughness after immersion (T1) for Trilux and Tritone teeth, regardless of the acid solution. For Trilux teeth, all acid solutions increased Ra (P<.05). For Tritone teeth, only the coke-based soft drink did not statistically change Ra. Grape juice (T2) altered Ra only of artificial teeth (P<.05). The color was changed for all materials, after T1 and T2. CONCLUSION: In general, the acidic solutions changed the Ra and ΔEab of HPAR and artificial teeth after T1. The grape juice altered the roughness only of the artificial teeth, promoting a clinically acceptable color change in the materials.

3.
Arch Oral Biol ; 109: 104577, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31606567

RESUMEN

Although the effectiveness of some mouthwashes has been proven, phytotherapy is still a field to be explored as an alternative to commercial products. OBJECTIVE: To evaluate, in vitro, the cytotoxicity and efficacy of two solutions based on citronella oil (CN), on S. aureus and C. albicans biofilms (in formation-adhesion phase and 24 h-biofilm formation) on acrylic resin and nickel-chromium alloy samples (one trademark of each material), compared to two alcohol-free commercial mouthwashes. MATERIAL AND METHODS: Two solutions containing CN at concentrations of 5x and 10x the minimum bactericidal/fungicidal concentration (MBC/MFC) were prepared by microdilution. After contamination of the samples surfaces with these microorganisms, the mouthwashes (CN - 5x and 10x; CHX - 0,12% alcohol-free chlorhexidine and LT - alcohol-free essential oils) were evaluated. Mouthwash simulation was performed for 1 min at two moments, the first simulation after 4 h of microbial adhesion and 24 h-biofilm formation, and the second simulation, 6 h after the first simulation. For biofilm quantification, the number of cultured cells was evaluated by CFUs. The cytotoxicity assay was performed on HaCat epithelial cells and quantified by the MTT method. RESULTS: Tested solutions completely inhibited the growth of both microorganisms in the adhesion phase. All solutions showed inhibitory activity against 24 h-biofilm formation. However, CN led to greater microbial reduction, regardless of the surface of the sample. All solutions demonstrated a toxic effect. However, after serial dilution, CN presented the lowest cytotoxic effect. CONCLUSION: Citronella had a lower cytotoxic effect and a higher action compared to commercial solutions.


Asunto(s)
Biopelículas/efectos de los fármacos , Cymbopogon/química , Prótesis Dental/microbiología , Antisépticos Bucales/farmacología , Aceites Vegetales/farmacología , Antiinfecciosos/farmacología , Candida albicans/efectos de los fármacos , Línea Celular , Humanos , Pruebas de Sensibilidad Microbiana , Staphylococcus aureus/efectos de los fármacos
4.
Rev. Odontol. Araçatuba (Impr.) ; 38(3): 27-33, set.-dez. 2017. tab, graf, ilus
Artículo en Portugués | LILACS, BBO - Odontología | ID: biblio-881656

RESUMEN

Este é um estudo cuja finalidade foi demonstrar as possíveis deformações que podem ocorrer nos modelos obtidos de moldes de alginato, dependentes da forma de vazamento. Foram obtidos 20 moldes de alginato da marca Hydrogum 5 (Zhermack, Badia Polesine, Italy), através de um modelo de resina acrílica previamente preparado, divididos em dois grupos de 10: com vazamento invertido e não invertido. Os modelos foram analisados por fotografias, mensurados por um programa de computação (Corel Draw X3 Graphics Suíte (Corel Corporation ­ USA) e comparados com o modelo padrão. Os resultados mostraram que os vazamentos invertidos e não invertidos apresentaram valores clínicos diferentes do modelo padrão, mas que na comparação entre as técnicas, dos quatro segmentos analisados, apenas um apresentou diferença estatística significante(AU)


This is a study whose purpose was to demonstrate the possible deformations that may occur in the models obtained from alginate molds, depending on the form of flow. 20 alginate molds of Hydrogum 5 (Zhermack, Badia Polesine, Italy) were obtained through a previously prepared acrylic resin model, divided into two groups of 10: with inverted and non inverted casting. The models were analyzed by photographs, measured by a computer program (Corel Draw X3 Graphics Suite (Corel Corporation - USA) and compared with the standard model.The results showed that inverted and non inverted flow presented clinical values different from the standard model, But that in the comparison between the techniques, of the four analyzed segments, only one presented significant statistical difference(AU)


Asunto(s)
Alginatos , Materiales de Impresión Dental
5.
J Acupunct Meridian Stud ; 10(2): 131-134, 2017 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-28483185

RESUMEN

Paresthesia is defined as an alteration in local sensibility, associated with numbness, tingling, or unpleasant sensations caused by nerve lesions or irritation. It can be temporary or permanent. The treatment protocol for facial paresthesia is primarily based on the use of drugs and implant removal, which may not be completely effective or may require other risk exposure when there is no spontaneous regression. However, other therapeutic modalities such as acupuncture can be used. The aim of this study is to report a case of a patient with paresthesia of the inferior alveolar nerve and pain caused by an implant surgery performed 2 years earlier. The patient received acupuncture treatment during 4 months of weekly sessions. Six points were used: Large Intestine (LI4), Large Intestine (LI11), Stomach (ST36), Liver (LR3), Extra Head and Neck (E-HN-18), and Stomach (ST5). The visual analog scale was used before and after each session for the analysis of paresthesia and pain, together with assessment of the paresthesia by delimitation of the desensitized region of the skin and presented discomfort. Pain remission and reduction in the size of the paresthesia area occurred after four sessions.


Asunto(s)
Terapia por Acupuntura/métodos , Implantes Dentales/efectos adversos , Parestesia/etiología , Parestesia/terapia , Animales , Femenino , Humanos , Nervio Mandibular/fisiopatología , Persona de Mediana Edad
6.
J Prosthet Dent ; 118(3): 430-436, 2017 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-28222886

RESUMEN

STATEMENT OF PROBLEM: The stability of the optical characteristics of dental ceramics is essential. Degradation of these materials resulting from pH or temperature alterations in the oral cavity can lead to treatment failure. PURPOSE: The purpose of this in vitro study was to evaluate the color change (ΔE), the L* coordinate, the translucency parameter, and the contrast ratio of lithium disilicate ceramic exposed to commonly used and potentially colorant solutions. MATERIAL AND METHODS: Fifty lithium disilicate specimens were prepared and divided into 5 groups according to the immersion solution (artificial saliva, orange juice, cola, coffee, and red wine). Immersions in acidic beverages were alternated in a thermocycler with artificial saliva. The control group was immersed in artificial saliva at 37°C throughout the immersion period. After 168 hours of immersion, the color parameters were assessed with a spectrophotometer and calculated using the because system on 2 backgrounds (black and white) and in 2 time periods, before thermocycling and after thermocycling. Data were submitted to analysis of variance followed by the Tukey honest significant difference test (α=.05). RESULTS: Greater color change (ΔE) and lower L* coordinate values were observed after immersion in orange juice and cola. Regarding the translucency parameter and contrast ratio, the immersion in coffee resulted in greater opacity and lower translucency of the material. CONCLUSIONS: Alterations in the color stainability, the L* coordinate values, the translucency parameter, and the contrast ratio of the lithium disilicate ceramic were observed, according to the acidic solutions tested.


Asunto(s)
Porcelana Dental/química , Bebidas , Humanos , Ensayo de Materiales/métodos , Saliva Artificial , Espectrofotometría , Propiedades de Superficie
7.
Rev. Odontol. Araçatuba (Impr.) ; 38(1): 46-51, Jan.-Abr. 2017. ilus
Artículo en Portugués | LILACS, BBO - Odontología | ID: biblio-876044

RESUMEN

A fratura de côndilo mandibular é um dos tipos de traumas faciais mais comuns, podendo ser diagnosticado por diversos meios, sendo que uma variedade de planos de tratamentos podem ser instaurados. Este tipo de fratura configura também uma das etiologias da disfunção temporomandibular (DTM), portanto, é indispensável que o profissional realize exames minuciosos, inclusive por meio de exames complementares de imagem para o correto diagnóstico e conduta curativa, tanto da fratura, quanto da disfunção. Sendo assim, o objetivo deste estudo foi descrever um caso de fratura de côndilo mandibular não tratada seguida de DTM. Paciente de 36 anos do gênero masculino com histórico de acidente automobilístico há cinco anos, resultando em fratura de côndilo, com diagnóstico tardio e consolidação em posição inadequada buscou tratamento na Faculdade de Odontologia de Araçatuba - UNESP. A conduta por meio do uso de placa interoclusal levou à eliminação da sintomatologia dolorosa(AU)


The condylar fracture is one of the most common types of facial trauma and can be diagnosed by different methods, and a variety of treatment plans can be used. This type of fracture also constitutes one of the etiologies of temporomandibular disorders (TMD). Therefore, it is essential that the professional conduct thorough examinations, including complementary imaging tests for the correct diagnosis and treatment of the fracture and the dysfunction. Thus, the aim of this study was to describe a case of untreated condylar fracture followed by the development of TMD. A 36-year-old male patient with a history of automobile accident five years ago, resulting in condylar fracture, sought treatment at the Aracatuba Dental School - UNESP. The fracture had late diagnosis and consolidation in a wrong position. The conduct treatment through the use of occlusal splint led to the elimination of the painful symptomatology(AU)


Asunto(s)
Humanos , Masculino , Adulto , Fracturas Mandibulares , Ferulas Oclusales , Articulación Temporomandibular
8.
Arch Oral Biol ; 67: 34-8, 2016 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-27019139

RESUMEN

OBJECTIVE: To compare electrical activity in the anterior temporal and masseter muscles on the habitual (HMS) and non-habitual mastication side (NHMS), during mastication and in the mandibular postural position. In addition, the increase in electrical activity during mastication was assessed for the HMS and NHMS, analysing both working (WSM) and non-working side during mastication (NWSM). METHODS: A total of 28 healthy women (18-32 years) participated in the study. They were submitted to Kazazoglu's test to identify the HMS. Bioresearch 'Bio EMG' software and bipolar surface electrodes were used in the exams. The exams were conducted in the postural position and during the unilateral mastication of raisins, on both the HMS and NHMS. The working and non-working side on HMS and NHMS were assessed separately. The obtained data were then statistically analysed with SPSS 20.0, using the Paired Samples Test at a significance level of 95%. RESULTS: The differences in the average EMG values between HMS and NHMS were not statistically significant in the postural position (Temporal p=0.2; Masseter p=0.4) or during mastication (Temporal WSM p=0.8; Temporal NWSM p=0.8; Masseter WSM p=0.6; Masseter NWSM p=0.2). Differences in the increase in electrical activity between the masseter and temporal muscles occurred on the working side, on the HMS and NHMS (p=0.0), but not on the non-working side: HMS (p=0.9) and NHMS (p=0.3). The increase in electrical activity was about 35% higher in the masseter than in the temporal muscle. CONCLUSIONS: Mastication side preference does not significantly impact electrical activity of the anterior temporal and masseter muscles during mastication or in postural position.


Asunto(s)
Masticación/fisiología , Músculos Masticadores/fisiología , Adolescente , Adulto , Fenómenos Biomecánicos , Electrodos , Electromiografía/métodos , Femenino , Humanos , Maxilares/fisiología , Mandíbula/fisiología , Músculo Masetero/fisiología , Músculo Temporal/fisiología , Adulto Joven
9.
J Prosthet Dent ; 116(1): 136-43, 2016 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-26922209

RESUMEN

STATEMENT OF PROBLEM: Dentists often note problems with infection in patients with maxillofacial prostheses. Conventional disinfection protocols are not always effective and may alter the properties of the polymer used in the prosthesis. Thus, the search for improved disinfection methods is important. PURPOSE: The purpose of this in vitro study was to evaluate and compare the antimicrobial activity of conventional disinfectant solutions (water and neutral soap and 4% chlorhexidine) and plant extracts (Cymbopogon nardus and Hydrastis canadensis) on specimens of maxillofacial silicone contaminated with Candida albicans and Staphylococcus aureus biofilms. MATERIAL AND METHODS: Seventy-two silicone (MDX4-4210) specimens were fabricated (5×2 mm) and sterilized. Thirty-six were contaminated with C albicans (10(6) cells/mL) and 36 with S aureus (10(8) cells/mL) to evaluate the antimicrobial activity of the cleaning protocols. After incubation (37°C/72 hours), the specimens were divided into 5 groups: not disinfected (positive control), soaking in saline solution for 10 minutes, soaking in 4% chlorhexidine for 10 minutes, soaking in C nardus for 10 minutes, soaking in H canadensis for 10 minutes, and washing by hand with water and neutral soap for 30 seconds. The viability of cells was evaluated by XTT (2,3-bis-(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide) assay and by scanning electron microscope analysis. The results were analyzed by ANOVA and the Tukey HSD test (α=.05). RESULTS: All disinfection solutions provided a statistically significant reduction in biofilm viability compared with the control group for both microorganisms (P<.05). Washing with water and neutral soap was significantly more effective in reducing biofilm viability than immersion in the disinfection solutions, with persistence of viable microorganisms between 1.05% for C albicans and 0.62% for S aureus after this cleaning protocol. Photomicrographs revealed that 4% chlorhexidine altered the surface of the polymer. CONCLUSIONS: Within the limitations of this in vitro study, it was concluded that the cleaning protocols with different disinfectant solutions produced a significant reduction in the viability of C albicans and S aureus biofilms on the silicone polymer. Washing with water and neutral soap was the most effective protocol against both microorganisms.


Asunto(s)
Antiinfecciosos/farmacología , Biopelículas/efectos de los fármacos , Desinfectantes Dentales/farmacología , Extractos Vegetales/farmacología , Prótesis e Implantes/microbiología , Candida albicans/efectos de los fármacos , Cymbopogon/química , Huesos Faciales , Humanos , Hydrastis/química , Maxilar , Siliconas , Staphylococcus aureus/efectos de los fármacos
10.
J Prosthet Dent ; 115(4): 501-8, 2016 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-26602149

RESUMEN

STATEMENT OF PROBLEM: Silicone elastomers undergo physical and chemical degradation with disinfecting solutions. Phytotherapy may be a suitable solution for disinfection. However, its effect on the properties of the silicone material is unknown. PURPOSE: The purpose of this in vitro study was to evaluate the effect of disinfection with conventional and plant-extract solutions and of artificial aging on the hardness and color stability of a facial silicone associated with pigments and an opacifier. MATERIAL AND METHODS: Four hundred specimens of silicone (MDX4-4210) were fabricated (5×6 mm). Two pigment shades and 1 dry opacifier were combined in the tested material, and 4 groups (n=10) were obtained: colorless (GI), colorless with opacifier (GII), medium pigment with opacifier (GIII), and black pigment with opacifier (GIV). Specimens were subjected to disinfection (30 days) using saline solution, water, and neutral soap (digital friction, 30 seconds), chlorhexidine 4%, Hydrastis canadensis, and Cymbopogon nardus extracts (immersion, 10 minutes). Shore A hardness (ASTM D2240) and color analyses were performed before and after disinfection. Specimens were then exposed to 1008 hours of artificial aging (ASTM 53) and subjected to final hardness and color readings. The results were analyzed with ANOVA and the Tukey significant difference test (α=.05). RESULTS: The opacifier increased the hardness (GII). For GII, the H. canadensis solution and the friction with water and soap promoted significantly reduced hardness; the friction also promoted a reduction in this property for GIV. The GIII was not affected after disinfection. A significant difference was found between the ΔE values of the specimens disinfected with H. canadensis, C. nardus, and chlorhexidine, and specimens subjected to saline solution and neutral soap. CONCLUSION: The hardness of MDX4-4210 after the experimental procedure was considered clinically acceptable for facial prostheses. All groups showed clinically unacceptable color alterations regardless of the disinfecting solution.


Asunto(s)
Desinfectantes/farmacología , Elastómeros/química , Dureza , Coloración de Prótesis , Color , Humanos , Ensayo de Materiales , Prótesis Maxilofacial , Elastómeros de Silicona , Factores de Tiempo
11.
J Med Eng Technol ; 39(6): 322-7, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26100976

RESUMEN

The aim of this study was evaluate the biomechanical behaviour of prostheses screwed into conventional (0° angulation) and pre-angled experimental (8, 12 and 20°) external hexagon implants (13 × 4 mm) by photoelastic analysis. Eight casts were made in photoelastic resin. Casts were divided into groups of single crowns or three combined elements. Each unit was positioned in a circular polariscope. By using a universal testing machine, 100 N loads were applied in the axial and oblique (45°) directions to fixed points on the occlusal surfaces of the crowns. Generated stresses were recorded photographically and analysed qualitatively in a graphics program. In single-element prostheses, the number of high-stress fringes increased with increasing implant angle. However, in three-element prostheses, there was no difference in the stress distribution with implant angle, except for the 12° implant that had a higher degree of stress. For the other groups pre-angulation of the implant increases the concentration and intensity of stresses for single prosthesis and has similar stress distribution in three-element fixed prostheses.


Asunto(s)
Implantes Dentales , Huesos/fisiología , Modelos Biológicos , Estrés Mecánico
12.
Eur J Dent ; 9(2): 171-175, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26038645

RESUMEN

OBJECTIVE: The aim of this study was to evaluate the influence of oral contraceptive use on the silent period (SP) of anterior temporal and masseter muscles during the menstrual cycle. MATERIALS AND METHODS: Totally, 28 women on reproductive age were selected including 15 nonusers of any hormone and 13 contraceptive users. All patients were dentate without muscular temporomandibular disorders. Electromyography (SP test) of the anterior temporal and masseter muscles was conducted every week during three consecutive menstrual cycles at 1(st) day of menstruation (P1), 7(th) day (P2), 14(th) day (P3) and 21(st) day (P4). RESULTS: The SP values in the anterior temporal and masseter muscles were measured at both sides. The SP values of the right side (13.49 ms) at P2 were significantly different compared to the left side (12.28 ms). However, there was no significant difference on the interactions among the three factors. CONCLUSION: It can be concluded that the SP values in healthy women in reproductive age may not be influenced by the menstrual cycle with similar results for both muscles.

13.
Ann Med Surg (Lond) ; 4(2): 200-3, 2015 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-26052437

RESUMEN

INTRODUCTION: The treatment of orofacial tumors may cause facial deformities by losses of structures that affect basic functions, i.e. feeding, speech, and the reduction of patient self-steam. PRESENTATION OF CASE: A white male patient was diagnosed with epidermoid cancer on the mandibular alveolar ridge with infiltration staging IV A. The patient was submitted to a mandibulectomy associated with a complete extraction of mandibular teeth. For rehabilitation, a conventional denture for the mandibular arch and a removable partial denture for the maxillary arch were fabricated. A correct occlusal adjustment and a satisfactory amount of alveolar bone was favorable for conventional dentures of the prostheses bases improve their retention and stability. After one year of follow-up, the patient was adapted to the prostheses, satisfied with their retention, and reported an improvement on his feeding. DISCUSSION: The prosthetic rehabilitation of patients after a partial mandibulectomy is essential for their self-steam. Conventional dentures may have their retention and stability improved if they are well fabricated, recorded and have a balanced occlusion. CONCLUSION: A correct occlusal adjustment and an adequate retention of the prostheses bases may improve their retention and stability. Patients without xerostomy and with a satisfactory amount of alveolar bone may have a favorable prognosis for conventional dentures.

14.
J Contemp Dent Pract ; 16(12): 944-9, 2015 12 01.
Artículo en Inglés | MEDLINE | ID: mdl-27018028

RESUMEN

AIM: To evaluate the effect of 37% carbamide peroxide on the bond strength of conventional or resin-modified glass-ionomer cements when used as a cervical barrier in endodontically-treated teeth. MATERIALS AND METHODS: After root canal instrumentation and obturation, 40 specimens of the cement-enamel junction were obtained after transversal root canal sectioning from human extracted canines. The root canal specimens were standardized and filled with the following materials (n = 10, each group): G1: zinc phosphate (control), G2: Ketac glass-ionomer, G3: vitrebond glass-ionomer or G4: GC GL glass-ionomer. After 24 hours, the specimens were subjected to an application of 37% carbamide peroxide for 21 days, changed each 7 days and stored in an artificial pulp chamber. The specimens were then submitted to push-out bond strength testing with an electromechanical test machine (EMIC) and the failure mode in each specimen was analyzed with confocal microscopy (LEXT). RESULTS: G3 and G4 showed higher bond strengths values than the other groups (p < 0.05), and were similar to each other (p > 0.05). G1 showed the lowest bond strength value (p < 0.05). CONCLUSION: Glass-ionomer cements showed higher bond strength values than the zinc phosphate cement, and resin-modified glass-ionomer cements presented the highest push-out values to root canal dentin (GC, GL and Vitrebond). CLINICAL SIGNIFICANCE: Glass ionomer cements are recommended to use as cervical barrier materials before the internal dental bleaching, but its efficiency is questionable.


Asunto(s)
Recubrimiento Dental Adhesivo , Cavidad Pulpar , Cementos de Ionómero Vitreo , Peróxidos/farmacología , Blanqueadores Dentales/farmacología , Urea/análogos & derivados , Peróxido de Carbamida , Resinas Compuestas , Dentina , Humanos , Ensayo de Materiales , Cementos de Resina , Urea/farmacología
15.
Rev. Odontol. Araçatuba (Online) ; 35(1): 9-13, jan.-jun. 2014. ilus, tab, graf
Artículo en Portugués | BBO - Odontología | ID: biblio-856975

RESUMEN

Halitose é o odor desagradável do ar expelido pela cavidade oral, narinas ou faringe. Este odor origina-se principalmente pela presença de compostos sulfurados voláteis produzidos por bactérias presentes na cavidade oral. Pode ter origem fisiológica (estresse, hálito da manhã, jejum prolongado, dietas inadequadas); razões locais (má-higiene bucal, biofilme retido na língua e/ou amígdalas, baixa produção de saliva, gengivites e periodontites) ou mesmo razões sistêmicas (diabetes, problemas renais ou hepáticos, dentre outros). Na Terceira Idade, este problema tende a aumentar significativamente, devido a diversos fatores. Dessa forma, o objetivo deste estudo foi diagnosticar a presença de halitose no grupo geriátrico atendido na clínica odontológica da UNIRP, identificando sua incidência e principais causas. A amostra constituiu-se de 48 pacientes voluntários com 60 anos ou mais e abrangeu mais de 90% dos pacientes nessa faixa etária ali atendidos. Foram realizados uma anamnese e exame físico intra-oral e a halitose foi detectada utilizando um halímetro portátil. No grupo pesquisado, aproximadamente 54,16% apresentou halitose, destes 84,61% eram usuários de prótese. A saburra lingual esteve presente em 80,76% dos indivíduos com halitose. Após a escovação lingual, 88,46% dos portadores de halitose tiveram o índice inicialmente aferido pelo halímetro diminuído. Com base nos resultados deste estudo, concluiu-se que fatores como uso de próteses dentárias e presença de saburra lingual são determinantes etiológicos no surgimento da halitose


Halitosis is the unpleasant odor of exhaust air through the mouth and lungs. There are over 50 causes, and approximately 90% of cases, is of oral origin. May have physiological origin (stress, breath of morning, fasting, and inappropriate diets), local reasons (bad oral hygiene, bacterial plaque retained on the tongue and/or tonsils, lower production of saliva, gum disease) or systemic reasons (diabetes, kidney or liver problems, constipation, etc.). In the Third Age, this problem tends to increase significantly. Thus, the aim of this study was to detect the presence of halitosis in the geriatric group attended in the dental clinic of UNIRP, identifying their incidence and principal causes. The sample consisted of 48 volunteer patients aged 60 years or older and included more than 90% of patients treated in this age group. It was performed a anamnesis and physical examination. The intra-oral halitosis was detected using a breath meter (halimeter). In the group studied, approximately 54.16% had halitosis, 84.61% of these were users of the prosthesis. The tongue coating was present in 80.76% of individuals with halitosis. After brushing the tongue, 88.46% of patients with halitosis have had the initial index oral malodor decreased. Based on the results of this study it was concluded that factors as dental prostheses and tongue coating are critical factors in causing halitosis


Asunto(s)
Humanos , Masculino , Femenino , Persona de Mediana Edad , Anciano , Anciano de 80 o más Años , Prótesis Dental , Odontología Geriátrica , Halitosis , Higiene Bucal
16.
Full dent. sci ; 1(4): 392-399, jul.-set. 2010.
Artículo en Portugués | LILACS, BBO - Odontología | ID: lil-642937

RESUMEN

O objetivo deste trabalho foi o de realizar uma revisão de literatura a respeito dos tratamentos de superfície e tipos de cimentação adesiva existentes para peças protéticas livres de metal. Com base na literatura em relação às restaurações cerâmicas com alto conteúdo de sílica, o tratamento com jateamento ou ácido fluorídrico seguido da aplicação de silano, tem demonstrado bons resultados. Nos sistemas de cerâmicas ricas em alumina, estariam indicados métodos alternativos, como a silicatização ou o uso de cimentos resinosos que contêm monômeros fosfatados.


The purpose of this paper was to review the literature about surface treatment for adhesive cementation of metal free systems. On the basis of the studied literature, it is possible to conclude that for ceramic restorations with a high level of silica, the treatment with sandblasting or fluoridric acid before silane application has showed good results. For alumina-based ceramics are more indicated systems like Rocatec and resin cements with MDP or phosphate monomers.


Asunto(s)
Cementos Dentales/química , Porcelana Dental/química , Silanos
17.
J Craniofac Surg ; 21(2): 323-7, 2010 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-20186092

RESUMEN

The failure of facial prostheses is caused by limitations in the properties of existing materials, especially flexibility and durability. Therefore, this study evaluated the Shore A hardness of silicone used for fabrication of facial prostheses, Silastic MDX4-4210, according to the influence of storage period, daily disinfection, and 2 types of pigmentation. Thirty specimens were fabricated and divided in 3 groups: colorless, pigmented with makeup, and pigmented with iron oxide. Analysis of results was assessed on a Shore A hardness meter immediately, 6 months, and 1 year after fabrication of specimens, following the guidelines of the American Society for Testing and Materials. The hardness values were statistically analyzed by the Tukey test. The silicone exhibited an increase in hardness with time. However, the hardness was stable from 6 months to 1 year. It was concluded that the silicone is within the values of Shore A hardness reported in the literature, regardless of the storage period, pigmentation, and chemical disinfection.


Asunto(s)
Materiales Biocompatibles/química , Desinfectantes/química , Prótesis e Implantes , Diseño de Prótesis , Elastómeros de Silicona/química , Clorhexidina/análogos & derivados , Clorhexidina/química , Color , Colorantes/química , Cosméticos/química , Compuestos Férricos/química , Dureza , Humanos , Ensayo de Materiales , Docilidad , Factores de Tiempo
18.
J Craniofac Surg ; 21(1): 142-5, 2010 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-20072018

RESUMEN

The failure of facial prostheses is caused by limitations in the properties of existing materials, especially flexibility and durability. Therefore, this study evaluated the marginal deterioration of a silicone used for fabrication of facial prostheses (Silastic MDX4-4210, Dow Corning Corporation, Midland, MI, USA) according to the influence of artificial aging, daily disinfection, and 2 types of pigmentation. Thirty specimens were fabricated and subdivided in 6 groups: without pigmentation, pigmented with make-up powder and iron oxide, and evaluated with and without the action of the disinfectant. Analysis of marginal deterioration was performed on a scanning electron microscope (magnification, x5000) immediately 6 months and 1 year after fabrication of specimens, following the guidelines of ASTM International. After visual analysis of the photomicrographs, it was noticed that all groups presented marginal deterioration and alterations in surface texture with time. The use of disinfection did not contribute to the marginal deterioration of polymer (silicone), regardless of the pigmentation and artificial aging.


Asunto(s)
Colorantes/química , Desinfección , Prótesis Maxilofacial , Siliconas/química , Microscopía Electrónica de Rastreo , Fotomicrografía , Propiedades de Superficie , Factores de Tiempo
19.
Ciênc. odontol. bras ; 10(3): 44-52, jul.-set. 2007. ilus, graf, tab
Artículo en Portugués | LILACS, BBO - Odontología | ID: lil-500850

RESUMEN

O objetivo desta pesquisa foi avaliar a influência da desinfecção química e da armazenagem por 3 meses sobre a deformaçãoinicial, deformação permanente e a porosidade de três materiais reembasadores resilientes. Os corpos-de-provaforam divididos em 2 grupos para cada material: sem e com desinfecção química. Foram analisados em relógio indicador,para a verificação da deformação inicial e permanente e visualmente para a porosidade. Essas leituras foram realizadas 3meses após a polimerização dos corpos-de-prova. Concluiu-se que todos os materiais reembasadores resilientes sofreramdeformação inicial e permanente, após o período analisado, independentemente da desinfecção química. O material queapresentou a menor deformação inicial e permanente foi o Dentuflex. Após 3 meses, apenas o material Dentuflex nãoapresentou porosidade.


Asunto(s)
Clorhexidina , Polimetil Metacrilato , Dentadura Completa , Alineadores Dentales
20.
Rev. Assoc. Paul. Cir. Dent ; 60(6): 479-482, nov.-dez. 2006. tab, ilus
Artículo en Portugués | LILACS, BBO - Odontología | ID: lil-543800

RESUMEN

O objetivo deste trabalho foi verificar a relação entre os trespasses vertical, horizontal e as desordens temporomandibulares. Para o estudo, foram selecionados 30 individuos: dez assintomáticos, dez com desordem muscular e dez com desordem articular, por meio de anamnese e exame físico. Os trespasses vertical e horizontal dos indivíduos foram mensurados a partir de imagem digitalizada de modelos de gesso, no programa AutoCAD 2000. De acordo com os resultados obtidos, não houve diferença estatisticamente significativa nos trespasses observados entre os grupos.


The purpose of this study was to analyse the relation between overbite, overjet and temporomandjbular disorders (TMD). To the study were selected 30 patients: ten assintomatic, ten with muscular disorder and ten with articular disorder, by medical history taking, and physical examination. Overbite and overjet were measured on AutoCAD 2000 program, using cast molds. According to the results, there was no significant statistic difference between groups.


Asunto(s)
Humanos , Masculino , Femenino , Adulto , Mandíbula , Estrés Mecánico , Trastornos de la Articulación Temporomandibular , Bruxismo , Maloclusión
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