Grant Data
Project Title
Magnets in dentistry
Principal Investigator
Dr Dias, Andrew Paul Lakshman Henry   (Principal investigator)
Duration
73
Start Date
1992-01-01
Completion Date
1998-01-31
Amount
0
Conference Title
Presentation Title
Grant Type
Other Funding Scheme
Funding Year
1991/1992
Status
Completed
Objectives
Magnets have been used in dentistry for over 50 years. With the development of the rare-earth-cobalt alloy magnets, their use became widespread both as retention aids for prostheses and for orthodontic tooth movement. Such magnetic systems are available commercially. However, in the development of such systems the available literature reveals that basic physical principles have largely been ignored or erroneous baseless assemptions made. The force-distance relationship has been said to be according to the inverse-square law or some other "laws". The keeper has largely been ignored. Retention has been claimed to be dependant on the speed of separation. These claims and others will be examined both theoretically and experimentally.