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1.
Australas J Ageing ; 2020 Nov 06.
Artículo en Inglés | MEDLINE | ID: mdl-33155390

RESUMEN

OBJECTIVES: To determine preferences for health and aged care services in Aboriginal and Torres Strait Islander Australians and explore related factors. METHODS: Mixed-method, cross-sectional study including 336 Aboriginal and Torres Strait Islander people aged 60 years and older from regional and urban areas. RESULTS: Exclusive preference for Aboriginal Community Controlled services was most common. This preference significantly increased when preferences for, and use of, aged care and disability services were considered. The likelihood of holding an exclusive preference for Aboriginal Community Controlled services was higher in regional settings compared to urban and in those reporting lower engagement in traditional activities during childhood. CONCLUSIONS: These findings suggest that the majority of older Australian Aboriginal and Torres Strait Islander people prefer aged and disability care provided by Aboriginal services. Given the anticipated increase in service demand in this population, there is a growing need for culturally safe services, particularly in regional settings.

2.
J Esthet Restor Dent ; 2020 Oct 03.
Artículo en Inglés | MEDLINE | ID: mdl-33009726

RESUMEN

OBJECTIVES: This study examined the in vitro fatigue resistance of maxillary premolars with 2 mm or 3 mm preserved cusp thicknesses restored with lithium disilicate onlays. MATERIALS AND METHODS: Premolars(N = 48) were divided into six groups. Onlays for groups 1 to 4 preserved a 3 mm functional (G1), 2 mm functional (G2), 3 mm nonfunctional (G3), or 2 mm nonfunctional (G4) buccal-lingual cusp width. Onlays for group 5 (G5, control) replaced both cusps. Group 6 (G6) samples were identical to G1 with added retentive boxes. Lithium disilicate onlays were exposed to thermocycling (10 000 cycles, 5°C-55°C, 30s/cycle) and mechanical loading (1.2 million cycles at 1.4 Hz and 70 N). All samples were examined for onlay debonding or cusp or onlay fracture. RESULTS: Failure rates were 75%(G1), 0.0%(G2), 12.5%(G3), 0.0%(G4), 0.0%(G5), and 0.0%(G6). The difference in percent failure between the groups preserving the functional cusps (37.5%) and the groups preserving the nonfunctional cusps (6.3%) was statistically significant (P = .04; 95%CI:2.11-55.66). No cusp or restoration fractures were observed; all failures were due to debonding of the restoration. CONCLUSION: Teeth with thin remaining cusps that were restored with bonded lithium disilicate onlay restorations were not prone to fracture. Retentive preparation features that physically eliminated lateral displacement prevented onlay debonding even though the ceramic-enamel margin was directly at the occlusal contact. CLINICAL SIGNIFICANCE: The use of adhesively retained lithium disilicate ceramic onlays may be a viable alternative to full coverage restorations and may challenge traditionally accepted principals related to preparation resistance and retention form of ceramic partial coverage restorations.

3.
Artículo en Inglés | MEDLINE | ID: mdl-33050541

RESUMEN

While there is strong evidence of the need for healthy ageing programs for older Aboriginal Australians, few are available. It is important to understand older Aboriginal Australians' perspectives on healthy ageing in order to co-design culturally-appropriate programs, including views on technology use in this context. Semi-structured interviews were conducted with 34 Aboriginal Australians aged 50 years and older from regional and urban communities to explore participants' health concerns, preferences for healthy ageing programs, and receptiveness to technology. Qualitative data were analyzed using a grounded theory approach. This study found that older Aboriginal Australians are concerned about chronic health conditions, social and emotional well-being, and difficulties accessing health services. A range of barriers and enablers to participation in current health programs were identified. From the perspective of older Aboriginal people, a successful healthy ageing program model includes physical and cognitive activities, social interaction, and health education. The program model also provides culturally safe care and transport for access as well as family, community, cultural identity, and empowerment regarding ageing well as central tenets. Technology could also be a viable approach for program delivery. These findings can be applied in the implementation and evaluation of culturally-appropriate, healthy ageing programs with older Aboriginal people.

4.
J Prosthodont ; 29(8): 693-698, 2020 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-32767417

RESUMEN

PURPOSE: This study was done to compare the survival rates of cast gold and ceramic onlays placed in a dental school setting. MATERIAL AND METHODS: An electronic search was conducted in the patient records at Adams School of Dentistry, University of North Carolina at Chapel Hill for onlay codes that were in the database (From 1998 until 2018). Progress notes and radiographs were scrutinized to establish the survival time of the restorations. Any complications that occurred during the life time of the restorations were noted. The survival was summarized by categorization based on ranges of survival time in years; group 1: 1 to 5 years, group 2: 6 to 22 years. The mean survival time and standard deviation were calculated. One-way ANOVA was used to determine whether there was a statistically significant difference in the survival times between gold and ceramic onlays. RESULTS: The mean survival rate of cast gold onlays (86.6%) was comparable to that of ceramic onlays (81.1%). The gold onlays in Group 1 had a higher mean survival time (2.43 years) than the ceramic onlays (2.03 years). This difference was statistically significant (p = 0.002). The ceramic onlays in Group 2 had a mean survival time of 19.75 years while gold onlays had a mean survival time of 17.63 years. This difference was not statistically significant (p = 0.91). CONCLUSION: It was concluded that while the survival rate of ceramic onlays (81.1%) was inferior to that of cast gold onlays (86.6%), it was comparable.


Asunto(s)
Oro , Incrustaciones , Cerámica , Porcelana Dental , Fracaso de la Restauración Dental , Humanos , Estudios Retrospectivos
5.
Dent Mater J ; 34(5): 605-10, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26438983

RESUMEN

The effect of staining and vacuum sintering on optical properties and the bi-axial flexural strength of partially and fully stabilized monolithic zirconia (PSZ, FSZ) were evaluated. Disc-shaped specimens divided into three subgroups (n=15): non-stained, stained and non-stained with vacuum sintering. After staining and sintering, optical properties were evaluated using a reflection spectrophotometer and bi-axial flexural strength was tested using the piston-on-three balls technique. Statistical analysis was performed using multivariate analysis of variance (MANOVA) followed by post-hoc Tukey's tests (p<0.05). Staining decreased translucency parameter (TP) values of FSZ (p<0.05). Sintering under vacuum enhanced TP values for PSZ (p<0.05). Staining enhanced surface gloss for both types of zirconia (p<0.05). Staining increased bi-axial flexural strength of FSZ (p<0.05), while it decreased the strength of PSZ (p<0.05). Sintering under vacuum provided minimal benefits with either type of zirconia.


Asunto(s)
Cerámica/química , Materiales Dentales/química , Circonio/química , Análisis del Estrés Dental , Ensayo de Materiales , Fenómenos Mecánicos , Propiedades de Superficie , Vacio
6.
Dent Mater ; 31(12): 1445-52, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-26494266

RESUMEN

OBJECTIVE: To evaluate the surface topography and optical properties of monolithic zirconia after immersion in simulated gastric acid. MATERIALS AND METHODS: Four partially stabilized (PSZ) and one fully stabilized (FSZ) zirconia materials were selected for the study: Prettau (PRT, Zirkonzahn), Zenostar (ZEN, Ivoclar), Bruxzir (BRX, Glidewell), Katana (KAT, Noritake) and FSZ Prettau Anterior (PRTA, Zirkonzahn). IPS e.max (Ivoclar) was used as a control. The specimens (10×10×1.2mm, n=5 per material) were cut, sintered, polished and cleaned before immersed in 5ml of simulated gastric acid solution (Hydrochloric acid (HCl) 0.06M, 0.113% solution in deionized distal water, pH 1.2) for 96h in a 37°C incubator. Specimens were weighed and examined for morphological changes under scanning electron microscope (SEM) coupled with energy dispersive X-ray spectroscopy (EDX). Surface roughness was evaluated by a confocal microscope. Surface gloss and translucency parameter (TP) values were determined by a reflection spectrophotometer before and after acid immersion. The data was analyzed by one-way ANOVA followed by Tukey's HSD post hoc test (p<0.05). RESULTS: PRTA displayed the most weight loss (1.40%) among the zirconia specimens. IPS e.max showed about three times more weight loss (3.05%) than zirconia specimens as an average. SEM examination indicated areas of degradation, bead-like shapes and smoothening of the polishing scratches after acid immersion. EDX displayed ion interactions and possible ion leaching from all specimens. Sa and Sq values for PRTA, ZEN and IPS e.max were significantly lower (p<0.05) after acid immersion. TP values increased significantly for PRT, ZEN and IPS e.max (p<0.05), while the surface gloss of ZEN, PRTA and IPS e.max increased (p<0.05). SIGNIFICANCE: Monolithic zirconia materials show some surface alterations in an acidic environment with minimum effect on their optical properties. Whether a smoother surface is in fact a sign of true corrosion resistance or is purely the result of an evenly progressive corrosive process is yet to be confirmed by further research.


Asunto(s)
Materiales Dentales/química , Ácido Clorhídrico/química , Circonio/química , Corrosión , Ensayo de Materiales , Microscopía Confocal , Microscopía Electrónica de Rastreo , Óptica y Fotónica , Espectrometría por Rayos X , Propiedades de Superficie
7.
Dent Mater ; 31(10): 1180-7, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26198027

RESUMEN

OBJECTIVES: The aims of this study were to: (1) estimate the effect of polishing on the surface gloss of monolithic zirconia, (2) measure and compare the translucency of monolithic zirconia at variable thicknesses, and (3) determine the effect of zirconia thickness on irradiance and total irradiant energy. METHODS: Four monolithic partially stabilized zirconia (PSZ) brands; Prettau® (PRT, Zirkonzahn), Bruxzir® (BRX, Glidewell), Zenostar® (ZEN, Wieland), Katana® (KAT, Noritake), and one fully stabilized zirconia (FSZ); Prettau Anterior® (PRTA, Zirkonzahn) were used to fabricate specimens (n=5/subgroup) with different thicknesses (0.5, 0.7, 1.0, 1.2, 1.5, and 2.0mm). Zirconia core material ICE® Zircon (ICE, Zirkonzahn) was used as a control. Surface gloss and translucency were evaluated using a reflection spectrophotometer. Irradiance and total irradiant energy transmitted through each specimen was quantified using MARC® Resin Calibrator. All specimens were then subjected to a standardized polishing method and the surface gloss, translucency, irradiance, and total irradiant energy measurements were repeated. Statistical analysis was performed using two-way ANOVA and post-hoc Tukey's tests (p<0.05). RESULTS: Surface gloss was significantly affected by polishing (p<0.05), regardless of brand and thickness. Translucency values ranged from 5.65 to 20.40 before polishing and 5.10 to 19.95 after polishing. The ranking from least to highest translucent (after polish) was: BRX=ICE=PRT

Asunto(s)
Materiales Dentales/química , Pulido Dental , Cementos de Resina/química , Circonio/química , Luz , Curación por Luz de Adhesivos Dentales , Ensayo de Materiales , Polimerizacion , Espectrofotometría/métodos , Propiedades de Superficie
8.
J Prosthet Dent ; 114(1): 103-8, 2015 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-25882969

RESUMEN

STATEMENT OF PROBLEM: Monolithic zirconia restorations are increasingly common. Dual-polymerizing cements have been advocated for cementation. The opacious nature of zirconia restoration can attenuate light, compromising optimal resin polymerization and eventually restoration debonding. PURPOSE: The purpose of this in vitro study was to evaluate the influence of material thickness on light irradiance, radiant exposure, and the degree of monomer conversion (DC) of 2 dual-polymerizing resin cements light-polymerized through different brands of monolithic zirconia. MATERIAL AND METHODS: Dual-polymerizing resin cements (RelyX Ultimate; 3M-ESPE, and Variolink II; Ivoclar, Vivadent) were mixed according to the manufacturers' instructions with a film thickness of 40 µm, placed under a 10 × 10 mm specimen of monolithic zirconia (Prettau Anterior by Zirkonzahn, Katana by Noritake, BruxZir by Glidewell, and Zenostar by Wieland) and a zirconia core control (ICE zirkon by Zirkonzahn) at various thicknesses (0.50, 1.00, 1.50, and 2.00 mm, n = 5 of each thickness). Each specimen was irradiated for 20 seconds (RelyX Ultimate) and 40 seconds (Variolink II) with Elipar S10 (3M-ESPE, 1200 mW/cm(2)). The amount of irradiance and radiant exposure was quantified for each specimen. Fourier transform infrared spectroscopy was used to measure the DC from the bottom surface of the resin. Statistical analysis was performed with 2-way ANOVA and post hoc Tukey honest significant difference (HSD) tests (α = .05). RESULTS: Light irradiance and radiant exposure decreased as the thickness of the specimen increased (P < .05) regardless of the brand. The ranking from least to highest was BruxZir < ICE zircon = Wieland < Katana = Prettau Anterior. The zirconia brand, thickness, and cement type had a significant effect on the DC (P < .001). The DC decreased significantly as the thickness of the zirconia increased (P < .001). Katana and Prettau Anterior showed the highest DC and BruxZir showed the lowest. CONCLUSION: The thickness of zirconia affects the DC of resin-based cements. The DC of the resin cements differed significantly between cements and among zirconia brands. More polymerizing time may be needed to deliver sufficient energy through some brands of zirconia.


Asunto(s)
Cerámica/química , Materiales Dentales/química , Curación por Luz de Adhesivos Dentales/métodos , Cementos de Resina/química , Auto-Curación de Resinas Dentales/métodos , Itrio/química , Circonio/química , Humanos , Luz , Ensayo de Materiales , Polimerizacion , Dosis de Radiación , Cementos de Resina/efectos de la radiación , Espectroscopía Infrarroja por Transformada de Fourier/métodos , Propiedades de Superficie , Factores de Tiempo
9.
J Prosthet Dent ; 113(6): 516-9, 2015 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-25794919

RESUMEN

The esthetic outcome of implant-supported restorations is affected by the implant position. A well-placed implant will allow appropriate contours of the restoration and together with an adequate volume of soft tissue will result in a functional and esthetic restoration. When a screw-retained restoration is anticipated, an implant that is angled too far facially would be esthetically unacceptable. In 2004, an abutment called the Dynamic Abutment (Talladium International Implantology) became commercially available. This abutment can allow a deviation of the restoration screw access angle to the implant angle of up to 28 degrees while allowing a screw-retained restoration to be connected directly to the platform of the implant. The purpose of this article was to describe the components, technique, and clinical use of this abutment.


Asunto(s)
Pilares Dentales , Diseño de Implante Dental-Pilar , Prótesis Dental de Soporte Implantado , Adulto , Implantación Dental Endoósea/métodos , Dentadura Parcial Fija con Resina Consolidada , Dentadura Parcial Provisoria , Estética Dental , Femenino , Encía/patología , Humanos , Extracción Dental , Fracturas de los Dientes/cirugía , Raíz del Diente/lesiones , Raíz del Diente/cirugía
10.
J Esthet Restor Dent ; 25(3): 212-6, 2013 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-23936916
11.
Hand (N Y) ; 6(4): 364-72, 2011 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-23204961

RESUMEN

BACKGROUND: This study aims to evaluate patient outcomes associated with use of the Artelon® Spacer for the treatment of arthritis of the carpometacarpal joint (CMCJ) of the thumb. METHODS: Patients with Eaton stage I, II, or III carpometacarpal (CMC) joint arthritis and disabling pain that had failed conservative treatment were evaluated at 12, 36, and 48 months postsurgery for changes in pinch, patient satisfaction, pain, range of motion, grip strength, grind test, operative time, and X-ray evidence of subsidence. RESULTS: Complete data was available for 46 subjects and 49 thumbs. A statistically significant improvement in pain when subjected to a first CMC joint grind test, CMCJ stability and patient perception of hand and wrist function following implant insertion was seen. Patient-oriented outcomes showed statistically significant improvement in the Disabilities of the Arm, Shoulder, and Hand; pain; pinch and grip strength; and range of motion. X-ray analysis revealed that none of the distributions of measures of osteophytes, subluxation, and joint space narrowing showed statistically significant change. Bone erosion/remodeling changes of the first metacarpal were statistically significant. CONCLUSIONS: At a follow-up period of 4 years, patients had measured improvement as well as positive self-reported functional improvements following Artelon® implant insertion for the treatment of arthritis of the thumb CMCJ.

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