Original scientific paper
Measurement of orthodontic appliance forces by means of originally constructed sensors
Mladen Šlaj
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Željko Goja
; Zavod za mehaničke konstrukcije Fakulteta strojarstva i brodogradnje, Sveučilište u Zagrebu, Zagreb, Hrvatska
Vladimir Lapter
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Abstract
In introductory remarks the most important biomechanical principles, which are relevant for the research, and conditions which must be satisfied presented in intraoral measuring of orthodontic forces were pointedout. First the aim of the research was defined, and then the investigation of mechanical properties of acrylics as a material for orthodontic appliances were carried out. The type of strain gauges, bonds and measuring system configurations, as well as measuring amplifiers and recording instruments were discussed. Some of measuring sensors, their principles and applicability were discussed. The calibration apparatus was modified for the sensor developed, and the calibration results were analysed by means of statistical methods (linear regression). The behaviour of all used sensors were found to be linear, which enables their application and reduces the measuring results interpretation.
Keywords
orthodontics forces; strain gauges
Hrčak ID:
101233
URI
Publication date:
15.6.1989.
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