Vol. 5, Issue 12 (2019)
Clinical and histological study to evaluate the miniscrew penetration effect into dental root on dental pulp vitality during orthodontic treatment
Author(s): D Eisa Wahbi
Abstract: The purpose of this study was to evaluate the clinical and histological effects after the miniscrew penetration into dental root on dental pulp vitality during orthodontic treatment. 63 patients who their ages between 13-23 years old with 95 first premolars to be extracted as part of their orthodontic treatment participated in the study.80 miniscrews were inserted into the root with the intention of penetration into dental root.the sample that the miniscrews were inserted into their root divided into 8 groups depended on the depth of miniscrew insertion (dentin –cementum), orthodontics movement presence and extract period (after a week – after 3 months). The clinical syndrome was evaluated directly from the first day of miniscrew insertion until tooth extraction. After the extraction histological sections were tacken to evaluate the effects caused by the miniscrews insertion. The pain was the only clinical syndrome observed. Pain Frequent increased in the group that the miniscrews were inserted into the dentin and associated with orthodontic movement. The pain was slight, impermanent and overwrought by biting. The reparative cementumregenerated in all groups that extracted after 3 months of miniscrew insertion and histological changes (vitrification- hyperemia- chronic inflammation) were observed in the pulp in all groups that the miniscrews were inserted into the dentin regardless of extraction period or the presence of orthodontic movement. Histological change degree was higher in the groups that the miniscrews were inserted into the dentin of the groups that the miniscrews were inserted into the cementum, and increased at the presence of orthodontic movemet, and decreased by the time. When miniscrews penetrate root that could causes light pain, impermanent and overwrought by biting. Reparativecementum regenerated at every injury site regardless of insertion depth or the presence of orthodontic movement, also the pulp associated with clear histological changes include: vitrification, hyperemia and chronic inflammation. Histological change degree increased at increase the insertion depth but the orthodontic movement had not clear effect on this changes and decreased by the time.