Preliminary clinical study on intrusion of overerupted molars with a removable appliance
Yang, Y.-m.; Weng, S.-e.; Chen, L.-l.
Shanghai Kou Qiang Yi Xue 16(2): 161-167
2007
ISSN/ISBN: 1006-7248 PMID: 17546384 Document Number: 612208
To evaluate the clinical effect of molar intrusion with a removable appliance and determine its clinical value. Seven patients were selected in the study.The clinical effect of intrusion was evaluated,the periodontal attachments and root resorption post-treatment were accessed by models,clinical examination, periapical radiograph analysis via CygnusRay2TM digital X-ray system pre and post-treatment.The data was analyzed using SAS6.12 software package. All the overerupted molars had been intruded successfully within an average time of 3.7 months.Pre and post-treatment model analysis demonstrated the maximum intrusion amount was 3.05mm,minimum 1.03mm and mean 0.58mm per month.Analysis of pre and post-treatment periapical radiographs and periodontal probing depth showed no significant difference in probing depth,distance from cemento-enamel junction to alveolar bone crest,mesial and distal tooth length between pre- and post- treatment (P>0.05). Molar intrusion with the removable appliance has a significant effect without apparent destruction of the periodontal tissue and root resorption.