Study On Mandibular Bone Mineral Density Of Trigeminal Neuralgia After Radiofrequency Thermogangliocoagulation

Objective:To study on the mandibular bone mineral density of trigeminal neuralgia treated with radiofrequency thermogangliocoagulation. Methods:Taking digital panoramic radiographs to the newly diagnosed patients with trigeminal neuralgia in same condition, the voltage is 70K V, current constant 16 mA. To avoid the distortion of the image conversion process (Zoom in or out) and the loss of information, the photos were import-ed into the picture archiving and communication system(PACS) in image acquisition processing and saved in the same format of TIFF. To analysis the photos with quantity one:foramen and extension of two lines connecting was the horizontal axis, its perpendicular bisector is the axis of symmetry, selecting 7 points symmetry and respectively in two sides with line spacing and constant area of each point, the point 3 is in the mental foramen. Then making statistical analysis with t test to study the mandibular bone mineral density, less than 3 years were in one group, more than 3 years were in another group. Analysising the patients with recurrent using the same method. In the more than 3 years group, it was divided into two groups:one was in gender and the other was in age which was divided on 50 years. Results:There was no significant difference between the contralateral and ipsilateral mandibular bone mineral density in patients with trigeminal neuralgia who are untreated (P>0.05); There was no significant difference between the contralateral and ipsilateral mandibular bone mineral density in patients with trigeminal neuralgia who are treated in 3 years (P>0.05); In the patients with trigeminal neuralgia who are treated more than 3 years, there was significant difference between the contralateral and ipsilateral mandibular bone mineral density (*P<0.05,**P<0.01). In the gender group, there was no significant difference between men (P>0.05) but significant difference between women (P<0.05). In the age group, there was no significant difference between the age less than 50 and the age more than 50 (P>0.05). Conclusions:On digital panoramic radiographs of mandibular bone mineral density measurement, the study proved that it was important to make quantitative research of mandibular bone mineral density in the X-rays, trigeminal neuralgia has no significant difference to the mandibular bone mineral density, but after radiofrequency thermogangliocoagulation 3 years there was significant changes and with age and difference of gentle, it became clear differences. Meanwhile, the menopause has great affect on bone less, the women should attach more importance to the decrease of bone density.