This paper presents a robot periphery prototyped for the 6 degrees-of-freedom (DOF) Robotic Dental Testing Simulator, simulating the wear of materials on dental components, such as individual teeth, crowns, bridges or a full set of teeth. The robot periphery consists of the artificial jaws and compliance module. The jaws have been reverse engineered and represent a human-like mandible and maxilla with artificial teeth. Each clinically fabricated tooth consists of a crown and glass ceramic roots which are connected using resin cement. Normal clinical occlusion of the artificial jaws assembly was emulated by a dental articulator based on ‘Andrew’s six keys to occlusion’. The radii of the curves of Spee, Monson and Wilson were also measured as important jaw characteristic indicators to aid normal occlusion. A compliance module had to be built between the lower jaw and the robot platform to sustain the fluctuating forces that occur during normal chewing in the occlusal contact areas, where these high bite forces are major causes of dental component failure. A strain gauge force transducer has been integrated into the machined lower jaw, underneath the second molars, to measure axial biting forces applied to the posterior teeth. The experiments conducted have shown that the sensor is able to satisfactorily sense small changes in the compression force, when applied perpendicular to the occlusal surfaces of the teeth.
|Translated title of the contribution||Prototyping Artificial Jaws for the Robotic Dental Testing Simulator|
|Pages (from-to)||1209 - 1220|
|Number of pages||12|
|Journal||Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine|
|Volume||222 No H8|
|Publication status||Published - Nov 2008|