抄録
Clinical estimation of a diagnostic stent for mandibular implant using a multimodal radiography system has been shown.The purpose of this study was to estimate the availability in a cross-section of the mandible by tracing on a panoramic tomogram for evaluation of edentulous mandible and the effect of inclined positioning for measurement of the mandible. The reference markers were placed on the phantom for indicating X-ray beam to compare panoramic radiograph with panoramic tomogram.
The edentulous mandible was cut in the incisor,premolar, and molar regions to be 3 pieces and fixed to the mandibular positioner by resin. The metal tube was placed in each region vertical to the crest of the mandibular corpus. Subsequently, the mandible on the mandibular positioner was tilted up to 0° (standard position in our method), 5°,10° and 15°. The cross-sectional tomographic image of four angles was obtained by AZ 3000 to determine the width and the length of the alveolar process about three sections.
It was possible to direct X-ray beam using the metal tube for multimodal radiography.
The shape of each section (incisor, premolar, and molar) could be determined by the metal tube on the cross-sectional tomographic image. When the angle of mandibular positioner was tilted over 10°, the width and length of the alveolar process became significantly inaccurate by the paired t-test (p＜0.05). The results suggested that our method using the mandibular positioner and metal tubes was useful to obtain the information of morphometry in edentulous mandible.
