Your browser doesn't support javascript.
loading
Evaluation of intensity standards of tungsten-halogen and led curing units / Evaluación de estándares de intensidad de unidades de curado tugsteno-halógenas y leds
Mackenney-Palamara, María; Sarmiento-Cornejo, Jaime.
  • Mackenney-Palamara, María; Armada de Chile. Servicio Odontológico. Central Odontológica 1ª Zona Naval. Valparaíso. CL
  • Sarmiento-Cornejo, Jaime; Universidad de Valparaíso. Facultad de Odontología. CL
J. oral res. (Impresa) ; 8(2): 104-107, abr. 30, 2019. tab
Article in English | LILACS | ID: biblio-1145300
ABSTRACT
Current evidence indicates that the minimum light intensity of photo curing units required to polymerize in a reliable way a composite resin, in increments of 2mm, is 300mW/cm2. The recent introduction of new generations of composite resin materials for large volume increments, partially contrasts with ISO 4049 (2009), calling for the use of light intensity of 1,000mW/cm2. Therefore, it is considered relevant to carry out periodic measurements of the emission intensity of light-curing units of clinical use. The aim of this study was to test the intensity [mW/cm2] of a representative sample of tungsten-halogen and LED photopolymerization units used in private and public health service in different areas of the Valparaíso Region in Chile. This was achieved through the use of dental radiometers, without considering the variables of intensity modification over time (either spontaneously, by undesirable inherent characteristics of the device, or by programs of intensity modification in time), or the density of accumulated power needed. This in vitro diagnostic test, evaluated a sample of 507 units, 107 halogen and 400 LED, for a period of around one month, using two radiometers as measuring instruments. For LED units the Bluephase Meter® radiometer, from Ivoclar-VivadentTM was used, and for halogen units we used the Coltolux® from ColténeTM. As a result, 85% of the LED and halogen units achieved the minimum requirements of intensity needed for the polymerization of conventional dental biomaterials. However, only 25% from the tested units achieved a power density of 1,000mW/cm2.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Technology, Dental / Composite Resins / Dental Equipment Limits: Humans Country/Region as subject: South America / Chile Language: English Journal: J. oral res. (Impresa) Journal subject: Dentistry Year: 2019 Type: Article Affiliation country: Chile Institution/Affiliation country: Armada de Chile/CL / Universidad de Valparaíso/CL

Similar

MEDLINE

...
LILACS

LIS


Full text: Available Index: LILACS (Americas) Main subject: Technology, Dental / Composite Resins / Dental Equipment Limits: Humans Country/Region as subject: South America / Chile Language: English Journal: J. oral res. (Impresa) Journal subject: Dentistry Year: 2019 Type: Article Affiliation country: Chile Institution/Affiliation country: Armada de Chile/CL / Universidad de Valparaíso/CL