KAI Sadako Kyushu University, Faculty of Dental Science, Assistant Researcher, 大学院・歯学研究院, 助手 (70152577)
SHIMIZU Mayumi Kyushu University, Faculty of Dental Science, Assistant Researcher, 大学院・歯学研究院, 助手 (50253464)
CHIKUI Toru Kyushu University Hospital, Assistant Prof., 歯学部附属病院, 講師 (10295090)
NAKAYAMA Eiji Kyushu University Hospital, Assistant Prof., 歯学部附属病院, 講師 (60172467)
|Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2003: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2002: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
The purpose of this study was to clarify the value of quantitative Doppler waveform analysis of blood-flow as an objective indicator of pain in the region of the temporomandibular joint (TMJ).
Power Doppler sonography was, performed using a Sequoia 512 unit (Acuson, Mountain View, USA) with a linear transducer (15L8) to thirty healthy volunteers who had no pain and six patients who, had pain in the region of the TMJ. An axial power Doppler sonography image parallel to the Frankfurt horizontal plane and,perpendicular to the surface of the skin at the TMJ was obtained to detect the artery running close to the TMJ. With reference to the power Doppler image, a sample gate was placed at the center of the target artery, and then the velocity waveform was traced and a spectral analysis was performed with the built-in soft-ware for the automatic Doppler tracing to obtain the maximum velocity (MAX), the minimum velocity (MIN), the pulsatiity index (PI), and resistive index (RI). The pulse Dopple
r parameters were as follows : pulsed wave, central frequency, 8.0 MHz ; gate, 1mm ; filter, 1; Doppler angle, less than 60 degrees ; sweep speed, 50mm/s. Furthermore ; the Fourier transform of the waveform was performed to analyze the frequency pattern of the waveform. The mean value of each parameter of the velocity waveform was calculated, and the mean values and of volunteer group were compared to these of patient group. The distribution of the frequency of the velocity waveform of each subject was also compared to each other.
As a result, differences between the volunteer group and patient group in MAX and MIN were not significant, but differences between the two groups in P1 and RI were significant. Moreover, the frequency pattern of the waveform of the volunteer group was different from that of the patient group. Furthermore, the vascularity of the TMJ region in patient group was rich rather than that in volunteer group.
In conclusion, the quantitative Doppler waveform analysis of blood-flow, especially the frequency analysis has the potential of an objective indicator, of pain in the region of the TMJ. Less