The Telemetered Measurement of Strain on the Surface of a Maxillary Denture in Function

Intraoral strain gauge measurements on complete dentures: a methodological study

This paper discusses the advantages and the limitations of strain gauge clinical research in prosthodontics. It also demonstrates the possibility of long term studies by explaining a methodological study that was undertaken on a group of 19 patients on two occasions a year apart. Of this group six were supplied with maxillary and mandibular complete dentures, five had maxillary complete dentures and mandibular osseointegrated fixed 10-12 unit bridges, and eight had maxillary and mandibular complete dentures at the first experimental session and osseointegrated fixed 10-12 unit bridges in the mandible at the second. It was found that during maximum biting the direction of functional strain was comparatively stable at a given point of a denture. It was evident that in experiments 12 months apart no major changes had taken place in the experimental dentures nor the denture bearing tissues. The accuracy of the strain gauges used was maintained and there were no failures due to loss of retention of the gauges. Loss of insulation and short circuiting was an occasional problem but instantly recognized if it occurred.

In vivo forces on dental implants: hard-wiring and telemetry methods

Methods are presented for measuring vertical force components on bridged titanium dental implants in dog mandibles. These methods have included custom-made strain-gauge transducers, plus hard-wiring and telemetric schemes for data collection. The essential components of the measurement system are described, and typical bite force data are illustrated.

The use of strain gauges for biometrics in Europe

Strain gauges have a relevant role in mechanical measurements, and it is therefore quite natural that they find widespread use in biomechanics. They are used for the evaluation of the strain and stress distribution in particular points of structures of biomechanical interest, and, moreover, for the validation of numerical analyses.

This work reviews the use that European researchers make of this technique, mainly in orthopaedics, dentistry, and sport biomechanics.