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Typenprüfung von Lichtpolymerisationsgeräten I: Prüfungsprotokoll


Thormann, J; Lutz, F (1999). Typenprüfung von Lichtpolymerisationsgeräten I: Prüfungsprotokoll. Schweizer Monatsschrift für Zahnmedizin SMfZ, 109(11):1191-1202.

Abstract

DEUTSCH: Mit der Verbreitung der Lichtpolymerisation in der Zahnmedizin zur Aushärtung von lichthärtenden Füll- und Befestigungsmaterialen wurde das Lichtpolymerisationsgerät zu einem Standardgerät in der zahnärztlichen Praxis. Ist seine Lichtleistung einer der Hauptfaktoren für das Ausmass der Lichtpolymerisation, d. h. ihrer Qualität, so spielen im täglichen Gebrauch am Patienten noch weitere Faktoren wie Komfort, Handhabung, Leistungskontrolle eine Rolle. Der Markt von Lichtpolymerisationsgeräten ist gross und in einem ständigen Wandel. Objektive Konsumenteninformationen sind selten und meist schon überholt. Angesichts dieser Tatsachen wurde in dieser Untersuchung ein Konzept zu einer Typenprüfung von Lichtpolymerisationsgeräten erarbeitet. Mit dieser Typenprüfung sollen in einer weiteren Untersuchung alle sich auf dem schweizerischen Markt befindlichen Geräte getestet werden. Diese Ergebnisse sollen dann laufend durch neu auf dem Markt erscheinende Geräte aktualisiert werden.

ENGLISH: With the spread of light polymerisation in dentistry for curing light-activated filling and luting materials the visible-light curing unit has become a standard device in the dental office. The light intensity is the main factor for the degree of polymerisation. However, there are other factors like comfort, handling and intensity control influencing daily use. The light curing unit industry is large and always changing. Consumer information is rare and often out of date. Considering these facts the present study presents a concept of investigating light curing units. In a further study all light curing units available on the Swiss market will be investigated using this protocol. Newly released light curing units should be investigated in this manner to actualize the existing results. Initially specifications and features are summarised using a questionnaire. Several tests are performed to investigate the parameters of the units. The light intensity emitted from the curing tip is analysed by the radiant power, the radiance and the light distribution across the face of the light curing tip as a function of time. Precise radiometers and a camera for picture processing are used for these measurements. Density filters are used to reduce the radiant power. The measurements of the precise radiometer are compared with those of the integrated radiometer of the light-curing unit. In this way the precision of integrated radiometers is controlled at maximum and reduced output. For evaluating the presence and the quality of integrated voltage stabilizer, the line voltage is varied from 230 V down to 207 V and up to 244 V and the radiant power is measured. The integrated timer is measured for its accuracy in each unit. The time intervals are controlled using a stopwatch. Finally the cooling device is tested. Using a phonometer the noise of the cooling fan is measured. Furthermore, the overheating protector is controlled by recording the activating and resetting time.

DEUTSCH: Mit der Verbreitung der Lichtpolymerisation in der Zahnmedizin zur Aushärtung von lichthärtenden Füll- und Befestigungsmaterialen wurde das Lichtpolymerisationsgerät zu einem Standardgerät in der zahnärztlichen Praxis. Ist seine Lichtleistung einer der Hauptfaktoren für das Ausmass der Lichtpolymerisation, d. h. ihrer Qualität, so spielen im täglichen Gebrauch am Patienten noch weitere Faktoren wie Komfort, Handhabung, Leistungskontrolle eine Rolle. Der Markt von Lichtpolymerisationsgeräten ist gross und in einem ständigen Wandel. Objektive Konsumenteninformationen sind selten und meist schon überholt. Angesichts dieser Tatsachen wurde in dieser Untersuchung ein Konzept zu einer Typenprüfung von Lichtpolymerisationsgeräten erarbeitet. Mit dieser Typenprüfung sollen in einer weiteren Untersuchung alle sich auf dem schweizerischen Markt befindlichen Geräte getestet werden. Diese Ergebnisse sollen dann laufend durch neu auf dem Markt erscheinende Geräte aktualisiert werden.

ENGLISH: With the spread of light polymerisation in dentistry for curing light-activated filling and luting materials the visible-light curing unit has become a standard device in the dental office. The light intensity is the main factor for the degree of polymerisation. However, there are other factors like comfort, handling and intensity control influencing daily use. The light curing unit industry is large and always changing. Consumer information is rare and often out of date. Considering these facts the present study presents a concept of investigating light curing units. In a further study all light curing units available on the Swiss market will be investigated using this protocol. Newly released light curing units should be investigated in this manner to actualize the existing results. Initially specifications and features are summarised using a questionnaire. Several tests are performed to investigate the parameters of the units. The light intensity emitted from the curing tip is analysed by the radiant power, the radiance and the light distribution across the face of the light curing tip as a function of time. Precise radiometers and a camera for picture processing are used for these measurements. Density filters are used to reduce the radiant power. The measurements of the precise radiometer are compared with those of the integrated radiometer of the light-curing unit. In this way the precision of integrated radiometers is controlled at maximum and reduced output. For evaluating the presence and the quality of integrated voltage stabilizer, the line voltage is varied from 230 V down to 207 V and up to 244 V and the radiant power is measured. The integrated timer is measured for its accuracy in each unit. The time intervals are controlled using a stopwatch. Finally the cooling device is tested. Using a phonometer the noise of the cooling fan is measured. Furthermore, the overheating protector is controlled by recording the activating and resetting time.

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Additional indexing

Other titles:The type testing of light-polymerization equipment, I: the testing protocol
Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic for Preventive Dentistry, Periodontology and Cariology
Dewey Decimal Classification:610 Medicine & health
Language:German
Date:1999
Deposited On:11 Feb 2008 12:24
Last Modified:05 Apr 2016 12:19
Publisher:Schweizerische Zahnärzte-Gesellschft
ISSN:0256-2855
Additional Information:Free full text article
Related URLs:http://www.sso.ch/index.cfm?96C25F51A069452DB6E6B3C053EABC64
PubMed ID:10598516
Permanent URL: http://doi.org/10.5167/uzh-1603

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