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1.
Ciênc. rural (Online) ; 51(4): e20200599, 2021. tab
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1153883

RESUMO

ABSTRACT: The effect of sunflower oil (SO), sunflower oil-pomegranate sauce (PS1) and sunflower oil-plum sauce (PS2) on shelf life of marinated carp fillets was investigated in terms of sensory evaluation, chemical (peroxide value (POV), thiobarbituric acid (TBA), free fatty acids (FFA), total volatile basic nitrogen (TVB-N) and pH), and microbiological properties (Total viable count (TVC), Escherichia coli, Total coliform, Staphylococci/Micrococci, Salmonella spp.) during 30 days of storage. Proximate composition, which includes total crude protein%, fat%, moisture% and ash% of fresh carp fillets before marination process was analyzed and found 18.69±0.86, 4.08±0.19, 74.33±0.63 and 2.17±0.45, respectively. Sensory evaluation analysis showed that total appearance, odor-taste and texture scores decreased during storage. TVB-N significantly increased in all group after 1 month of storage (P<0.05). At the end of storage, the lowest TBA value (1.38 mg MA/kg carp fillet) was determined in the PS1 group. During storage, the highest POV value was observed in the control group (8.49 mEq O2/kg) compared to other groups. Initial TVC of 1.5 log CFU/g, 1.7 log CFU/g and 1.8 log CFU/g increased to 3.7 log CFU/g, 2.9 log CFU/g and 3.2 log CFU/g in SO, PS1 and PS2 groups, respectively. Results showed that the shelf life of marinated carp fillets treated with sunflower oil and in combination with pomegranate and plum sauce was more than 1 month.


RESUMO: O efeito do óleo de girassol (SO), molho de óleo de girassol-romã (PS1) e molho de óleo de girassol-ameixa (PS2) na vida útil de filetes de carpa marinados foi investigado em termos sensorial, químico (valor de peróxido (PV), ácido tiobarbitúrico) (TBA), ácidos graxos livres (AGL), nitrogênio básico volátil total (TVB-N) e pH) e propriedades microbiológicas (contagem viável total (TVC), Escherichia coli, coliforme total, estafilococos/Micrococos, Salmonella spp.). Durante 30 dias de armazenamento. A composição aproximada, que inclui % de proteína bruta total, % de gordura, % de umidade e % de cinzas de filés de carpa frescos antes do processo de marinação foi analisada e encontrada 18,69 ± 0,86, 4,08 ± 0,19, 74,33 ± 0,63 e 2,17 ± 0,45, respectivamente. A análise sensorial mostrou que os escores totais de aparência, odor e sabor diminuíram durante o armazenamento. TVB-N aumentou significativamente (P <0,05) em todos os grupos após 1 mês de armazenamento. No final do armazenamento, o menor valor de TBA (1,38 mg MA / kg de filé de carpa) foi determinado no grupo PS1. Durante o armazenamento, o maior valor de POV foi observado no grupo controle (8,49 mEq O2/kg) em comparação com outros grupos. O TVC inicial de 1,5 log CFU/g, 1,7 log UFC/g, 1,8 log CFU/g aumentou para 3,7 log CFU/g, 2,9 log CFU/g, 3,2 log CFU/g nos grupos SO, PS1 e PS2, respectivamente. Os resultados mostraram que a vida útil dos filés de carpa marinados tratados com óleo de girassol e em combinação com molho de romã e ameixa era superior a um mês.

2.
Anim Reprod Sci ; 221: 106545, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32861109

RESUMO

The study was conducted to evaluate effects of different dietary oils on egg quality and reproductive performance in rainbow trout. Broodfish (≈ 870 g) were fed four iso-nitrogenous and iso-lipidic diets differing in lipid sources: fish oil (FO), linseed oil (LO) and sesame oil (SO) as well as a commercial trout diet (CD) for about 5 months prior to spawning. Growth performance did not differ among the trout in the treatment groups. Mean diameter, volume and weight of eggs did not differ among the dietary treatments. Absolute fecundity, relative fecundity and gonadosomatic index were not affected by dietary treatment. A sub-set of eggs from females fed the experimental diets were fertilized to assess the reproductive performance of broodfish. When diets were fed, devoid of fish oil, fertilization rates were 89.2 ±â€¯5.8 and 92.1 ±â€¯4.9 %, eyeing rates were 87.3 ±â€¯5.3 and 84.1 ±â€¯4.4 % and hatching rates were 81.2 ±â€¯4.3 and 78.3 ±â€¯3.4 % in LO and SO fed fish, respectively. Fatty acid content of the eggs from broodstocks with a different nutritional history was affected by the dietary lipid sources. Eicosapentaenoic acid (EPA), arachidonic acid (ARA), and docosahexaenoic acid (DHA) concentrations in females fed vegetable oil based diets were greater than the dietary concentrations. Overall, results from the present study indicate there can be inclusion of LO or SO as dietary lipid sources without compromising egg quality and reproductive performance. Furthermore, there is efficient bioconversion of 18C fatty acids to 20-22 C fatty acids in rainbow trout.


Assuntos
Gorduras Insaturadas na Dieta/farmacologia , Ácidos Graxos Insaturados/farmacologia , Oncorhynchus mykiss/fisiologia , Oócitos/efeitos dos fármacos , Oviposição/efeitos dos fármacos , Animais , Gorduras Insaturadas na Dieta/administração & dosagem , Ácidos Graxos Insaturados/administração & dosagem , Oócitos/fisiologia
3.
Eur Oral Res ; 54(1): 16-24, 2020 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-32518906

RESUMO

PURPOSE: Cavity disinfection, in addition to routine caries removal methods, is recommended to eliminate the microorganisms. The aim of this study was to compare the effect of various systems Er,Cr:YSGG lasers, diode lasers and FotoSan and agents Corsodyl; Cervitec and Cervitec Plus and Fluor Protector-on the nanoleakage of compomer restorations when used for cavity disinfection. MATERIALS AND METHODS: A total of 40 intact human deciduous molar teeth containing Black V cavities (3×2×1.5 mm) on the buccal and lingual surfaces parallel to the cementoenamel junction were randomly divided into 8 groups according to the cavity disinfection methods. The antibacterial agents and systems were applied according to the manufacturer's instructions. Restorations were completed using a compomer. The restored teeth were then subjected to thermocycling for 500 cycles in a water bath at 5°C and 55°C with a dwell time of 30 seconds. After the thermocycling procedures, 1-mm sticks were obtained from the center of each cavity to prepare for the nanoleakage test. After the teeth were sectioned, they were immersed in 50 wt % ammoniacal silver nitrate solution for 24 hours and dipped in photo-developing solutions for 8 hours with fluorescent light irradiation. The samples were examined under a scanning electron microscope (SEM). The non-parametric Kruskal-Wallis and Mann-Whitney U test (p<0.05) were applied. RESULTS: The Er,Cr:YSGG laser group showed significantly less nanoleakage than all of the tested groups (p<0.01). The diode laser, Fluor protector and FotoSan groups showed similar nanoleakage to that of the control group (p>0.05). The Corsodyl (p<0.01) and Cervitec (p<0.001) groups showed significantly higher nanoleakage than the control group. CONCLUSION: Er,Cr:YSGG laser irradiation which showed lower nanoleakage scores from either control or tested groups can be recommended for cavity disinfection Additionally, a diode laser and FotoSan, which have antibacterial effects and no negative effect on leakage, can be used for cavity disinfection.

4.
Scanning ; 2019: 5452919, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31531156

RESUMO

OBJECTIVES: The aim of this study is to investigate the shear bond strength of an acrylic resin to titanium after different surface treatment methods. MATERIAL AND METHODS: A total of seventy-two disc-shaped specimens (10 mm × 10 mm × 2 mm) were prepared from titanium alloy. The specimens were randomly allocated to six equal groups: Group S (sandblasting), Group MP (metal primer), Group 10W (fiber laser 10 W), Group 20W (fiber laser 20 W), Group 10WMP (fiber laser 10 W+metal primer), and Group 20WMP (fiber laser 20 W+metal primer). All of the specimens were thermocycled up to 5000 cycles. After thermal cycling, a shear bond strength test was conducted. The shear bond strength data were analyzed with one-way ANOVA and Tukey's post hoc pairwise comparisons (p < 0.05). RESULTS: While the highest values were determined in Group MP, the lowest values were observed in Group S. Additionally, Group MP exhibited significantly higher shear bond strength values than any of the other groups (p < 0.05) except Group 10WMP. Similar results were observed between Group MP and Group 10WMP (p > 0.05). The groups in which a metal primer was applied (Group MP, 10WMP, and 20WMP) showed significantly higher values than Group S. The shear bond strength values of Group 10W and Group 20W were similar. CONCLUSIONS: The application of a metal primer significantly improved the bond strength of acrylic resin to titanium. Fiber laser application may be an alternative method to sandblasting for improving the bond strength of acrylic resin to titanium.

5.
Eur Oral Res ; 53(1): 12-20, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31309187

RESUMO

PURPOSE: Educators can also contribute to the prevention of early childhood caries (ECC) by educating children about oral diseases and hygiene practices. The aim of this study was to assess the knowledge, attitudes, and behaviors of pre-school teachers concerning oral and dental health in Trabzon. SUBJECTS AND METHODS: The study was carried out with 226 pre-school teachers in the city center using a self-administered questionnaire to evaluate their knowledge, attitudes, and behaviors concerning the oral and dental health of children. RESULTS: Only 29.8% of the respondents had a prior dental education. Although 83% of the teachers said that regular visits to the dentist were effective for caries prevention, only 13.2% said that they made regular visits to a dentist. Approximately 65.8% of the teachers agreed that fluoride strengthens tooth enamel and 35.1% of the teachers said that there were oral health activities in their schools. Additionally, 74.6% of teachers said that they would participate in dental education about children's oral health in the future. CONCLUSION: Preventive dental health program could be implemented including the proper behaviors related to the importance and treatability of primary teeth, first tooth cleaning, dental visits, the use of fluoride toothpaste, and oral hygiene into the pre-school teachers' undergraduate education programs in the future. This program should be repeated at certain intervals for the prevention of ECC.

6.
Lasers Med Sci ; 32(5): 1121-1129, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28466197

RESUMO

The purpose of this study was to investigate the effect of ultrafast fiber laser treatment on the bond strength between titanium and resin cement. A total of 60 pure titanium discs (15 mm × 2 mm) were divided into six test groups (n = 10) according to the surface treatment used: group (1) control, machining; group (2) grinding with a diamond bur; group (3) ultrafast fiber laser application; group (4) resorbable blast media (RBM) application; group (5) electro-erosion with copper; and group (6) sandblasting. After surface treatments, resin cements were applied to the treated titanium surfaces. Shear bond strength testing of the samples was performed with a universal testing machine after storing in distilled water at 37 °C for 24 h. One-way ANOVA and Tukey's HSD post hoc test were used to analyse the data (P < 0.05). The highest bond strength values were observed in the laser application group, while the lowest values were observed in the grinding group. Sandblasting and laser application resulted in significantly higher bond strengths than control treatment (P < 0.05). Ultrafast fiber laser treatment and sandblasting may improve the bond strength between resin cement and titanium.


Assuntos
Colagem Dentária , Lasers , Teste de Materiais , Cimentos de Resina/química , Titânio/química , Microscopia Eletrônica de Varredura , Espectrometria por Raios X , Propriedades de Superfície
7.
Comput Biol Med ; 86: 47-54, 2017 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-28500959

RESUMO

BACKGROUND AND OBJECTIVE: The purpose of this study is to evaluate and compare bone stress that occurs as a result of using vertical implants with simultaneous sinus augmentation with bone stress generated from oblique implants without sinus augmentation in atrophic maxilla. METHODS: Six, three-dimensional (3D) finite element (FE) models of atrophic maxilla were generated with SolidWorks software. The maxilla models were varied for two different bone types. Models 2a, 2b and 2c represent maxilla models with D2 bone type. Models 3a, 3b and 3c represent maxilla models with D3 bone type. Five implants were embedded in each model with different configurations for vertical implant insertion with sinus augmentation: Model 2a/Model 3a, 30° tilted insertion; Model 2b/Model 3b and 45° tilted insertion; Model 2c/Model 3c. A 150 N load was applied obliquely on the hybrid prosthesis. The maximum von Mises stress values were comparatively evaluated using color scales. RESULTS: The von Mises stress values predicted by the FE models were higher for all D3 bone models in both cortical and cancellous bone. For the vertical implant models, lower stress values were found in cortical bone. Tilting of the distal implants by 30° increased the stress in the cortical layer compared to vertical implant models. Tilting of the distal implant by 45° decreased the stress in the cortical bone compared to the 30° models, but higher stress values were detected in the 45° models compared to the vertical implant models. CONCLUSIONS: Augmentation should be the first treatment option in atrophic maxilla in terms of biomechanics. Tilted posterior implants can create higher stress values than vertical posterior implants. During tilting implant planning, the use of a 45° tilted implant results in better biomechanical performance in peri-implant bone than 30° tilted implant due to the decrease in cantilever length.


Assuntos
Osso Cortical , Prótese Dentária , Maxila , Modelos Biológicos , Levantamento do Assoalho do Seio Maxilar , Estresse Mecânico , Osso Cortical/patologia , Osso Cortical/fisiopatologia , Humanos , Maxila/patologia , Maxila/fisiopatologia
8.
J Indian Soc Periodontol ; 21(1): 66-70, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29386805

RESUMO

This report presents the clinical results of peri-implant plastic surgical approaches for hard and soft tissues before and during the implant placement in a patient with vertical ridge deformation and a shallow vestibule sulcus, and the subsequently performed prosthetic rehabilitation. The surgical approaches used in this case reduced the crown-height space and crown-to-implant ratio and ensured that the implants were placed in their ideal positions, and peri-implant tissue health was maintained. In conclusion, developments in the peri-implant plastic surgery enable the successful augmentation of hard and soft tissue defects and provide the implant-supported fixed prosthetic rehabilitation.

9.
Acta Biomater Odontol Scand ; 2(1): 1-6, 2016 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-27335898

RESUMO

Objective To determine whether the antimicrobial nature of a fatty acid chelate temporary dental cement can be enhanced by the addition of 5% cetyl pyridinium chloride (CPC). Materials and methods The temporary cement, Cavex Temporary was employed, and additions of CPC were made to either the base or the catalyst paste prior to mixing the cement. Release of CPC from set cement specimens was followed using reverse-phase HPLC for a period of up to 2 weeks following specimen preparation. Potential interactions between Cavex and CPC were examined by Fourier transform infrared spectroscopy (FTIR) and antimicrobial effects were determined using zone of inhibition measurements after 24 h with disc-shaped specimens in cultured Streptococcus mutans. Results FTIR showed no interaction between CPC and the components of the cement. CPC release was found to follow a diffusion mechanism for the first 6 h or so, and to equilibrate after approximately 2 weeks, with no significant differences between release profiles when the additive was incorporated into the base or the catalyst paste. Diffusion was rapid, and had a diffusion coefficient of approximately 1 × 10-9 m2 s-1 in both cases. Total release was in the range 10-12% of the CPC loading. Zones of inhibition around discs containing CPC were significantly larger than those around the control discs of CPC-free cement. Conclusions The antimicrobial character of this temporary cement can be enhanced by the addition of CPC. Such enhancement is of potential clinical value, though further in vivo work is needed to confirm this.

10.
J Oral Maxillofac Surg ; 74(9): 1728-40, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27058964

RESUMO

PURPOSE: Hyaluronic acid (HA) injections and occlusal splints have been suggested in the treatment of temporomandibular joint (TMJ) derangements, but no sufficient data are available from controlled clinical trials comparing HA injection with another treatment modality. This study compared the effectiveness of a single HA injection, a double HA injection, and splint therapy for the treatment of TMJ disc displacement with reduction (DDR). MATERIALS AND METHODS: A prospective clinical trial was designed. The study sample included patients with TMJ DDR. The primary predictor variable was treatment method. Patients were divided into 4 groups: control, single HA injection, double HA injection, and stabilization splint therapy. Patients were randomly assigned to 1 of 3 treatment groups. The control group was self-selected. The primary outcome variable was pain at rest and during mastication. The secondary outcome variables were TMJ noise, quality of life, and level of jaw movements. Clinical symptoms and jaw movements were evaluated at baseline and at 6-month follow-up. Descriptive, comparative, correlation, and multivariate analyses were conducted. RESULTS: The sample included 51 patients (66 TMJs) 18 to 48 years old. All treatment groups showed significant improvement compared with baseline values for pain, TMJ noise, quality of life, and maximum mouth opening (MMO) at 6-month follow-up (P < .05). However, the 2 HA injection groups indicated superior improvement for pain, MMO, and quality of life compared with the stabilization splint group (P < .05). CONCLUSIONS: The results of this study showed that HA injection and stabilization splinting are acceptably successful treatment modalities to alleviate the clinical signs and symptoms of TMJ DDR.


Assuntos
Ácido Hialurônico/uso terapêutico , Transtornos da Articulação Temporomandibular/tratamento farmacológico , Viscossuplementos/uso terapêutico , Adolescente , Adulto , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Placas Oclusais , Medição da Dor , Estudos Prospectivos , Amplitude de Movimento Articular/fisiologia , Transtornos da Articulação Temporomandibular/diagnóstico , Transtornos da Articulação Temporomandibular/fisiopatologia
11.
Quintessence Int ; 47(4): 307-18, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26824087

RESUMO

OBJECTIVE: In this study, 12-month follow-up clinical results of a combined peri-implant plastic surgery approach for hard and soft tissue augmentation in implant rehabilitation in the esthetic zone are presented. METHOD AND MATERIALS: Ten individuals who required extraction due to severe periodontal destruction in the maxillary and mandibular area were included in the study. Implant surgery was performed in the same session as the combined peri-implant plastic surgeries, which involved guided bone regeneration and free periosteal grafts. Prosthetic treatment was administered in the sixth month following the surgeries. RESULTS: Hard and soft tissue augmentation with sufficient keratinized mucosa width (≥ 2 mm) was achieved with the combined surgical approaches. Pleasing esthetic results were obtained by careful positioning of the implants. CONCLUSIONS: In implant rehabilitation, in cases where there are insufficient hard and soft tissues in the esthetic zone, a combined peri-implant plastic surgery approach not only enables the ideal implant position where both function and esthetics are ensured but also provides effective protection of peri-implant tissue health.


Assuntos
Implantação Dentária Endóssea/métodos , Implantes Dentários para Um Único Dente , Estética Dentária , Doenças Periodontais/complicações , Adulto , Regeneração Óssea , Feminino , Seguimentos , Regeneração Tecidual Guiada , Humanos , Carga Imediata em Implante Dentário , Masculino , Pessoa de Meia-Idade , Periósteo/transplante , Procedimentos de Cirurgia Plástica , Extração Dentária , Resultado do Tratamento
12.
J Appl Biomater Funct Mater ; 13(1): 17-27, 2015 Mar 18.
Artigo em Inglês | MEDLINE | ID: mdl-24700261

RESUMO

AIM: The purpose of this study was to evaluate the effect of different surface treatments on the bond strength of veneering ceramic to zirconia. METHODS: Square (15 mm x 10 mm x 2 mm) zirconia specimens (n=18) received one of the following surface treatments: Group 1, sandblasting; Group 2, Clearfil ceramic primer application; Group 3, grinding; Group 4, alloy primer application; and Group 5, RelyX ceramic primer application. The zirconia core specimens were layered with a veneering porcelain (5 mm x 3 mm x 3 mm). Mean shear bond strength values (MPa) were calculated. Data were analyzed with one-way ANOVA and Tukey's post hoc pairwise comparisons (α=0.05). Fractured surfaces of the specimens were examined with scanning electron microscope (SEM). RESULTS: This study showed that bond strengths of the metal primer-treated zirconia specimens (Group 4) were significantly higher than those of the other paired groups. The application of metal primer affected the specimens' failure mode. SEM analysis demonstrated that Group 4 had mainly cohesive fractures, while the other groups showed approximately equal levels of adhesive and mixed fracture types. The mean and SD values for shear bond strengths ranged from 8.90 ± 3.42 MPa (Group 2) to 19.74 ± 4.96 MPa (Group 4). CONCLUSIONS: In conclusion, the application of a metal primer to a zirconia core increased the bond strength of veneering ceramics. The use of chemical agents to improve the strength of the zirconia core's bond to veneering ceramic may have more benefits than the use of mechanical pretreatments.


Assuntos
Cerâmica/química , Materiais Revestidos Biocompatíveis/química , Zircônio/química
13.
J Oral Implantol ; 41(3): e73-81, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24456001

RESUMO

The long-term efficacy of adequate keratinized mucosa (>2 mm) in dental implants is controversial. Peri-implant plastic surgeries are currently used because they increase keratinized mucosa width (KMW), helping to regain peri-implant health and maintaining it over the long-term. We present the clinical findings using free-gingival-graft (FGG) and free-periosteal-graft (FPG) techniques in peri-implant plastic surgery for implant rehabilitation patients. We included 20 patients with implant indications of inadequate KMW (KMW < 2 mm for postimplantation) in the maxilla and mandible. All underwent clinical and radiographic measurements and a treatment protocol was prepared for implant rehabilitation and subsequent peri-implant plastic surgery. A decision as to whether and when FGG or FPG techniques would be used was made. FGG/FPG was performed pre-implantation (before monocortical block-bone augmentation) or postimplantation (before/during/after stage 2 surgery). KMW was ≥ 2 mm after application of FGG/FPG pre- or post-implantation. Moreover, peri-implant tissue health was regained/maintained in all cases from 6 months to 4 years. Peri-implant plastic surgery techniques can prevent hard- and soft-tissue problems after implant rehabilitation and during treatment of developing problems. However, surgical design and timing, and an interdisciplinary perspective determine the success of peri-implant plastic surgery.


Assuntos
Implantes Dentários , Procedimentos de Cirurgia Plástica , Humanos , Mandíbula , Maxila , Mucosa
14.
Open Dent J ; 8: 207-12, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25489351

RESUMO

This case report presents an implant-aided prosthetic treatment in which peri-implant plastic surgery techniques were applied in combination to satisfactorily attain functional aesthetic expectations. Peri-implant plastic surgery enables the successful reconstruction and restoration of the balance between soft and hard tissues and allows the option of implant-aided fixed prosthetic rehabilitation.

15.
ScientificWorldJournal ; 2014: 832947, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25162066

RESUMO

The aim of this study was to evaluate the effects of nanofilled protective resin coating (RC) on the surface roughness (Ra) and color stability (ΔE) of resin-based restorative materials (RM) (compomer (C), nanofilled composite (NF), and microhybrid composite (MH)) after being submitted to the ultraviolet aging (UV) method. Thirty-six specimens were prepared (n = 6 for each group). The Ra and (ΔE) values and SEM images were obtained before and after UV. Significant interactions were found among the RM-RC-UV procedures for Ra (P < 0.001). After the specimens were submitted to UV, the Ra values were significantly increased, regardless of the RC procedure (with RC; P < 0.01 for all, without RC; C (P < 0.01), NF (P < 0.001), and MH (P < 0.001)) for each RM. Significant interactions were found between the RM-RC (P < 0.001) procedures for the ΔE values. The ΔE values were increased in each group after applying the RC procedures (P < 0.001). Protective RC usage for RM could result in material-related differences in Ra and ΔE as with used UV method.


Assuntos
Resinas Compostas/efeitos da radiação , Cor , Resinas Compostas/química , Teste de Materiais , Microscopia Eletrônica de Varredura , Propriedades de Superfície , Raios Ultravioleta
16.
J Prosthet Dent ; 112(3): 618-24, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24840909

RESUMO

STATEMENT OF PROBLEM: Surface treatments may affect the optical properties of ceramic veneers before cementation. PURPOSE: The purpose of this study was to evaluate whether various surface treatments affect the optical properties of different types of ceramic veneers. MATERIAL AND METHODS: Disk-shaped ceramic veneers (N=280) were prepared from the IPS e.max Press, e.max CAD, Empress Esthetic, e.max Ceram, and Inline ceramic systems with 0.5-mm and 1.0-mm thicknesses. The ceramics were divided into 4 groups: no surface treatments; etched with hydrofluoric acid; airborne-particle abraded with 30-µm Al2O3; and irradiated with erbium:yttrium-aluminum-garnet laser. A translucent shade of resin was chosen for cementation. Color parameters were examined with a colorimeter. Statistical analyses were done with 3-way ANOVA and the Bonferroni test (P=.05). RESULTS: Significant interactions were noted between the surface treatments, ceramic type, and thickness for ΔE values (P=.01), and no significant interactions were noted for L* (P=.773), a* (P=.984), and b* (P=.998). The greatest color change occurred after airborne-particle abrasion with 0.5-mm-thick e.max Press (2.9 ΔE). Significant differences in ΔE values were found among the hydrofluoric acid, airborne-particle abrasion, and laser groups for 0.5-mm-thick ceramics, except IPS Inline, and among the hydrofluoric acid, airborne-particle abrasion, and laser groups for 1.0-mm-thick ceramics, except Empress Esthetic ceramics. CONCLUSIONS: The color change of the ceramics increased after the surface treatments, particularly as the ceramics became thinner.


Assuntos
Porcelana Dentária/química , Facetas Dentárias , Condicionamento Ácido do Dente/métodos , Óxido de Alumínio/química , Silicatos de Alumínio/química , Silicatos de Alumínio/efeitos da radiação , Apatitas/química , Apatitas/efeitos da radiação , Cor , Colorimetria/métodos , Corrosão Dentária/métodos , Porcelana Dentária/efeitos da radiação , Humanos , Ácido Fluorídrico/química , Lasers de Estado Sólido , Teste de Materiais , Cimentos de Resina/química , Silanos/química , Propriedades de Superfície
17.
J Adv Prosthodont ; 6(1): 8-13, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24605200

RESUMO

PURPOSE: The purpose of this study was to evaluate whether surface treatments affect the translucency of laminate veneers with different shades and thicknesses. MATERIALS AND METHODS: A total of 224 disc-shaped ceramic veneers were prepared from A1, A3, HT (High Translucent) and HO (High Opaque) shades of IPS e.max Press (Ivoclar Vivadent) with 0.5 mm and 1.0 mm thicknesses. The ceramics were divided into four groups for surface treatments. Group C: no surface treatments; Group HF: etched with hydrofluoric acid; Group SB: sandblasted with 30-µm Al2O3 [corrected]; and Group L; irradiated with an Er;YAG laser. A translucent shade of resin cement (Rely X Veneer, 3M ESPE) was chosen for cementation. The color values of the veneers were measured with a colorimeter and translucency parameter (TP) values were calculated. A three-way ANOVA with interactions for TP values was performed and Bonferroni tests were used when appropriate (α=0.05). RESULTS: There were significant interactions between the surface treatments, ceramic shades and thicknesses (P=.001). For the 0.5-mm-thick specimens there were significant differences after the SB and L treatments. There was no significant difference between the HF and C treatments for any shades or thicknesses (P>.05). For the 1-mm-thick ceramics, there was only a significant difference between the L and C treatments for the HT shade ceramics (P=.01). There were also significant differences between the SB and C treatments except not for the HO shades (P=.768). CONCLUSION: The SB and L treatments caused laminate veneers to become more opaque; however, HF treatment did not affect the TP values. When the laminate veneers were thinner, both the shade of the ceramic and the SB and laser treatments had a greater effect on the TP values.

18.
J Adv Prosthodont ; 5(3): 287-95, 2013 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24049570

RESUMO

PURPOSE: This study investigated the effect of laser parameters and air-abrasion on the peel strength of silicon-based soft denture liner to different denture resins. MATERIALS AND METHODS: Specimens (N=180) were prepared out of three different denture base resins (Rodex, cross-linked denture base acrylic resin; Paladent, heat-cured acrylic resin; Deflex, Polyamide resin) (75 mm × 25 mm × 3 mm). A silicon-based soft denture liner (Molloplast B) was applied to the denture resins after the following conditioning methods: a) Air-abrasion (50 µm), b) Er,Cr:YSGG laser (Waterlase MD Turbo, Biolase Technology) at 2 W-20 Hz, c) Er,Cr:YSGG laser at 2 W-30 Hz, d) Er,Cr:YSGG laser at 3 W-20 Hz, e) Er,Cr:YSGG laser at 3 W-30 Hz. Non-conditioned group acted as the control group. Peel test was performed in a universal testing machine. Failure modes were evaluated visually. Data were analyzed using two-way ANOVA and Tukey's test (α=.05). RESULTS: Denture liner tested showed increased peel strength after laser treatment with different parameters (3.9±0.4 - 5.58±0.6 MPa) compared to the control (3.64±0.5 - 4.58±0.5 MPa) and air-abraded groups (3.1±0.6 - 4.46±0.3 MPa), but the results were not statistically significant except for Paladent, with the pretreatment of Er,Cr:YSGG laser at 3 W-20 Hz. Polyamide resin after air-abrasion showed significantly lower peel strength than those of other groups (3.1±0.6 MPa). CONCLUSION: Heat-cured acrylic resin, PMMA, may benefit from Er,Cr:YSGG laser treatment at 3 W-20 Hz irradiation. Air-abrasion of polyamide resins should be avoided not to impair their peel bond strengths to silicon-based soft denture liners.

19.
Int J Med Sci ; 10(11): 1503-9, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-24046524

RESUMO

PURPOSE: Oral rinses are widely used to promote periodontal health with provisional restorations during the interim period. The aim of this study was to compare the discoloration of provisional restoration materials with different oral rinses. MATERIAL AND METHODS: A total of 140 disc-shaped specimens (shade A2) (10 mm x 2 mm) were prepared from one PMMA-based (TemDent Classic(®)) and three different bis-acrylic-based (Protemp II(®), Luxatemp(®) and Fill-In(®)) provisional restoration materials (n=7). The color values (L*, a*, and b*) of each specimen were measured before and after exposure with a colorimeter, and the color changes (∆E) were calculated according to the CIE L*a*b* system. The specimens were immersed in each of the 4 oral rinses (alcohol-containing mouthwash, chlorhexidine, benzydamine HCl, benzydamine HCl and chlorhexidine) twice a day for 2 minutes. After 2 minutes of immersion in the oral rinses, the specimens were immersed in artificial saliva. The specimens were exposed to the oral rinses and the artificial saliva for 3 weeks. Two-way ANOVA, the Bonferroni test and the paired sample t-test were used for statistical analyses (p<0.05). RESULTS: Comparison of the discoloration from the oral rinses after immersion for three weeks revealed no significant differences (p>0.05). The lowest color change was observed in PMMA-based Temdent in all oral rinses (p<0.05). There were no significant differences between the bis-acryl composites after immersion in saliva or the mixture of benzydamine HCl and chlorhexidine and the alcohol-containing mouthwash for 3 weeks (p>0.05). After immersion in chlorhexidine, the color change values of Protemp II and Fill-in showed significant differences (p=0.018). Protemp II also showed less discoloration than the other bis-acryl composites, and this color change was statistically significant (p <0.05). For all oral rinses, the L* value decreased while b* values increased, and this color change was found to be statistically significant (p <0.05). A* values were found to be significantly higher with oral rinses (p<0.05), except Protemp II immersed in benzydamine HCl or alcohol-containing mouthwash. CONCLUSIONS: The type of the oral rinse did not affect the discoloration process. For long-term esthetic results, choosing MMA-based materials for provisional restorations appears to be more effective.


Assuntos
Antissépticos Bucais/química , Benzidamina/química , Clorexidina/química , Humanos , Saliva/química
20.
J Prosthet Dent ; 110(2): 107-15, 2013 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-23929372

RESUMO

STATEMENT OF PROBLEM: The failure of fixed dental restorations is commonly associated with caries. The use of conventional luting cements containing antibacterial agents may overcome this problem. PURPOSE: The purpose of this study was to evaluate the antibacterial activity (ABA), surface roughness (Ra), flexural strength (FS), and solubility (SL) patterns of the conventional dental luting cements zinc phosphate (ZP), zinc polycarboxylate (PC), and glass ionomer (GIC) after the addition of 5% chlorhexidine diacetate/cetrimide (CHX+CT). MATERIAL AND METHODS: Antibacterial agents with a total concentration of 5% (2.5% CHX+2.5% CT) were added to antibacterial agent-free conventional luting cement powders (ZPC, PCC, and GICC) and designated as experimental groups (ZPE, PCE, and GICE). ABA against Streptococcus mutans (SM) and Lactobacillus casei (LB) was examined by using the agar diffusion test method. Ra, FS, and SL values were obtained after storage in distilled water at 37°C for 24 hours. The Kruskal-Wallis and Mann Whitney U with Bonferroni correction tests were used to test for agar diffusion (α=.05) and 2-way ANOVA and Fisher Least Significant Difference (LSD) test were used to measure Ra, FS, and SL (α=.05). RESULTS: The control groups exhibited limited ABA. With the exception of PCE>PCC on day 1 for SM, all experimental groups showed significantly greater and longer-lasting protection against SM and LB bacteria for up to 180 days than their controls (P<.05). Ra values decreased (ZPC>ZPE; P>.05, PCC>PCE; P<.05) except that GICE>GICC (P>.05) when compared with their individual controls. Control groups exhibited higher FS values than did the experimental groups (ZPC>ZPE; P<.05, PCC>PCE; P<.05, GICC>GICE; P>.05). The experimental groups exhibited higher solubilities than did their controls in the ZPC (P>.05) and GICC groups (P<.05) but were lower in PCC group (P<.05). CONCLUSIONS: Incorporating a 5% CHX+CT mixture into conventional dental luting cements and altering their Ra, FS, and SL values may provide greater antibacterial protection against SM and LB.


Assuntos
Antibacterianos/química , Compostos de Cetrimônio/química , Clorexidina/química , Cimentos Dentários/química , Antibacterianos/farmacologia , Cetrimônio , Compostos de Cetrimônio/farmacologia , Clorexidina/farmacologia , Cimentos Dentários/farmacologia , Cimentos de Ionômeros de Vidro/química , Humanos , Lacticaseibacillus casei/efeitos dos fármacos , Óxido de Magnésio/química , Teste de Materiais , Maleabilidade , Cimento de Policarboxilato/química , Solubilidade , Streptococcus mutans/efeitos dos fármacos , Estresse Mecânico , Propriedades de Superfície , Temperatura , Fatores de Tempo , Água/química , Óxido de Zinco/química , Cimento de Fosfato de Zinco/química
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