Abstract
This study is to investigate the change of pulp sensibility on maxillary teeth after performing the combined surgical methods, that we used Le Fort I type osteotomy with anterior maxillary ostotomy.
12 months to 42 months after operation, electric pulp test was carried out on 10 patients who underwent Le Fort I type osteotomy (Le Fort I type group), and 8 patients who underwent Le Fort I type osteotomy with anterior maxilary ostotomy (combination group).
12 months after operation, the positive ratio of pulp sensibility show 92.3% in the combination group, 94.5% in the Le Fort I type group, from now on, the positive ratio in these two groups ascended with time. And for the 42 months after operation, positive ratio shows 98.9%, 99.1%. No significant difference could be found in the positive ratio between these two groups, and in positive ratio of the groups between the anterior region and the molar region.
As a result, it seemed that disturbance of pulp sensibility didn't increase when Le Fort I type osteotomy together with maxillary anterior osteotomy were used.
It seemed that a postoperative observation over 1 year was necessary.
