Measurement Of Bony Structure And Clinic Significance Of The Clivus

foramen to pharyngeal tubercle, anterior part of condyle occipital to pharyngeal tubercle, inner border of outer entrance of oval foramen to pharyngeal tubercle, inner border of lacerated foramen to pharyngeal tubercle, inner border of outer entrance of carotid canal to pharyngeal tubercle , inner border of outer entrance of hypoglossal canal to pharyngeal tubercle; (2) inner border of outer entrance of oval foramen to central line, inner border of lacerated foramen to central line, inner border of outer entrance of carotid canal tocentral line, inner border of outer entrance of hypoglossal canal to central line; (3) the outer height of slope,FML,AOCP,OCA,the distance of two occipital condyles.3 The statistics of data .4 To calculate the general average and standard error of all the items by the statistics software .5 Compare the data to the articles of same kind . To observe if is there some questons .[Results] 1 The distances from foramen incisive to pharyngeal tubercle, spina nasalis anterior to pharyngeal tubercle, spina nasalis posterior to pharyngeal tubercle, anterior part of greatoccipital foramen to pharyngeal tubercle are as follows: 72. 12±4. 25,77. 77±3. 89,33. 73±2. 07,13. 14±1. 91mm. Among the above the distances from anterior part of greatoc-cipital foramen to pharyngeal tubercle is new, which is significant to define the area of making a window in the clivus region which centered with pharyngeal tubercle.2 The distances from anterior part of condyle occipital to pharyngeal tubercle, inner border of outer entrance of oval foramen to pharyngeal tubercle, inner border of lacerated foramen to pharyngeal tubercle, inner border of outer entrance of carotid canal to pharyngeal tubercle and inner border of outer entrance of hypoglossal canal to pharyngeal tubercle are as follows: 15.71±1.74,27.51±2.12,15.98±1.98,25.93±2.23,19.15±1. 49mm. Among the above The distances from Anterior part of condyle occipital to pharyngeal tubercle is new, which seems with help in the operation of lateral transcondylar approach. The key data of the distance from inner border of lacerated foramen to pharyngeal tubercle is 15. 98±1. 98mm, which is bigger than 13. 2±2. 0mm from the article of the same kind.3 The distances from inner border of outer entrance of oval foramen to central line, inner border of lacerated foramen to central line, inner border of outer entrance of carotid canal tocentral line, inner border of outer entrance of hypoglossal canal to central line are as follows: 25.55±1. 63,11. 72±1. 70,25. 75±1. 98,17. 41±1. 41mm. The key data of the distance from inner border of lacerated foramen to central line is 11. 72±1. 70mm, which is bigger than 10.5±2. 0mm from the article of the same kind.4 The outer height of slope,FML,AOCP,OCA,the distance of two occipital condyles are as follows: 28.80±2.67,35.84±2.59,17.10±1.13,24.55±2.35,21.07±1.92mm. Among the above, The outer height of slope andthe distance of two occipital condyles are new.[Conclusions]Having obtained relatively complete bulbosacral anatomical date by measuring 20 skulls. In the operation from oropharynx to clivus, making a window in the clivus region which centered with pharyngeal tubercle and definited the radius of 15mm is secure. With the endoscope, in the operations from oropharynx to the middle and lower part of the clivus, making a rectangle window which definited 20mm×25mm.