IADR Abstract Archives
Objective Maintenance Method for Maintaining Permanent Function in Patients with Partial Denture Wearing
Objectives: The purpose of this study was to measure retentive force of various maintenance devices of partial denture by oral cavity management using simple maintenance force measuring device which can easily measure on chair side developed.
Methods: The way of producing simplified maintenance force measuring device was as follows: after applying coating treatment on a point of band removing pliers without a tip, we attached a strain gauge, and then welded the gauge terminal to the handle.
We vertically placed the point with a strain gauge of the simplified maintenance force measuring device to the retaining tooth occlusal surface which is the lower part of the retentive arm in the undercut area of maintenance device attached to the retaining teeth so that we can measure the strain force at the time of withdrawal by closing the handle part.
We calculated the retentive force of the maintenance device using a small digital display (Kyowa Electronic Instruments Co., Ltd. WDS-190AS1) as a conditioner for the sensor.
We measured Periotest values (PT values) of a retaining tooth in the 3 patients who had partial denture by using Periotest M (the Tokyo dental industry), and we also measured the retentive force (RF values) of the maintenance device on a continuous basis using the present measurement device.
Results: We regularly measured the values of PT and RF in patients wearing partial denture from the time when they started wearing it.
When the RF values was statistically significantly decreased, the retentive force was appropriately adjusted so that the RF values would be the same as at the beginning of wearing the denture.
There was no statistically significant change in the PT values when the RF value was significantly decreased.
Conclusions: We made it possible to adjust retentive force of partial denture using objective numerical values.
It was found that good long - term course can be obtained by oral cavity management using RF value and PT value for partial denture wearing patient.
Methods: The way of producing simplified maintenance force measuring device was as follows: after applying coating treatment on a point of band removing pliers without a tip, we attached a strain gauge, and then welded the gauge terminal to the handle.
We vertically placed the point with a strain gauge of the simplified maintenance force measuring device to the retaining tooth occlusal surface which is the lower part of the retentive arm in the undercut area of maintenance device attached to the retaining teeth so that we can measure the strain force at the time of withdrawal by closing the handle part.
We calculated the retentive force of the maintenance device using a small digital display (Kyowa Electronic Instruments Co., Ltd. WDS-190AS1) as a conditioner for the sensor.
We measured Periotest values (PT values) of a retaining tooth in the 3 patients who had partial denture by using Periotest M (the Tokyo dental industry), and we also measured the retentive force (RF values) of the maintenance device on a continuous basis using the present measurement device.
Results: We regularly measured the values of PT and RF in patients wearing partial denture from the time when they started wearing it.
When the RF values was statistically significantly decreased, the retentive force was appropriately adjusted so that the RF values would be the same as at the beginning of wearing the denture.
There was no statistically significant change in the PT values when the RF value was significantly decreased.
Conclusions: We made it possible to adjust retentive force of partial denture using objective numerical values.
It was found that good long - term course can be obtained by oral cavity management using RF value and PT value for partial denture wearing patient.