口顎機能のテレメータリング

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タイトル別名
  • Telemetering System for Dental Research
  • クチ ガク キノウ ノ テレメータリング

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In the field of dental clinic the radio telemetering technique provides a new fruitful method to study the stomatognathic system and has several advantages to observe physiologically the system of unrestrained subject.<BR>The transmitter available now can send solely such the discrete information as that expressed by on and off of a switch. Though some possibilities of transmitter able to send continuous information were also discussed, practical application has not yet been achieved. Therefore, a telemetering system was developed and applied for analysis of occlusal force.<BR>The transmitter was embeded in a removable partial denture with semiconductor strain gauges which were arranged to be sensitive to the vertical component of occlusal force applied to its metallic occlusal surface.<BR>The transmitter consisted of a blocking oscillator intermitting the 7 MHz carrier from a Hartley type oscillator with rate of 5 kHz. Applied occlusal force change the resistance of strain gauge, which, in turn, was inverted into change in potential difference. The frequency of subcarrier was modulated by this potential difference.<BR>The transmitted radio wave was received outside the oral cavity and demodulated into the potential difference proportional to occlusal force. <BR>Appling the device the temporal pattern of masticatory force against to the denture containing the transmitter was recorded during mastication by teeth of the homolateral as well as contralateral side to the denture.<BR>In contrast with the findings accepted widely, the pattern indicated that masticatory force was largest rather at the early stage of mastication and it decrease gradually during mastication. <BR>From these results it was suggested that working sites of occlusal surfaces in every stroke might change according to the stages of mastication and central area of occlusal surface might work at final stage.

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