RESUMO
Objective@#To study the effect of orthodontic traction on the roots and periodontal soft and hard tissues of buried obstructed upper incisors.@*Methods@#This study was reviewed and approved by the ethics committee, and informed consent was obtained from the patients. From January 2018 to December 2022, 40 patients who underwent orthodontic traction on impacted upper incisors were selected; those whose contralateral homonymous apical foramen was not developed were placed in group A (23 cases), and those whose contralateral homonymous apical foramen was developed were placed in group B (17 cases). Software was used to measure the root length of the impacted upper incisors in groups A and B on cone beam CT (CBCT) images before and after traction and compare the changes in alveolar bone (alveolar bone width, labral bone plate thickness, and horizontal height of alveolar bone) and keratinized gingival width between each impacted upper incisor and the corresponding contralateral tooth immediately and one year after traction@*Results@#The root length of the impacted upper incisors increased after traction compared to before traction (P<0.05). The width of the alveolar bone at the completion of traction in group A was similar to that of the contralateral homonymous tooth (P>0.05), whereas the width of the alveolar bone at the completion of traction in group B did not reach that of the contralateral homonymous tooth, with a significant difference in width (P<0.05). Neither the labial bone plate height or width in group A or B reached that of the contralateral homonymous tooth after traction (P<0.05). The keratinized gingival width on the affected side was also significantly smaller than that on the contralateral side (P<0.05), but it was increased significantly in group A at the one-year follow-up visit (P<0.05).@*Conclusion@#Tooth traction is conducive to impacted upper incisor root growth, alveolar bone reconstruction and keratinized gingival growth but cannot produce complete symmetry with respect to the contralateral side.
RESUMO
Objective@#This study aims to understand the awareness, attitude and parent-child communication of child sexual abuse (CSA) prevention among mothers of children with hearing loss.@*Methods@#Data was collected using anonymous self-administered questionnaires among 188 mothers of children with hearing loss in 7 hearing rehabilitation institutes in Beijing, during April to June in 2018.@*Results@#Mothers of children with hearing loss who participated in this study lacked knowledge. Only 3 participants (1.6%) could correctly answer all the 10 items. Besides, 71 participants (37.8%) held positive or supportive attitude towards all the 6 items of CSA prevention education. Most mothers thought CSA prevention education could help to prevent CSA, agreed with school-based relative education, and permitted their children to attend education activities. In addition, the participants lacked parent-child communication of CSA prevention, for only 12 mothers (6.4%) had talked with children about all the topics of the 10 items. Knowledge of mothers with high school or higher education was better than those with middle school or lower education(β=0.98, P<0.01). Scores of communication were significantly higher among mothers of elder children(β=0.33, P<0.01).@*Conclusion@#Further intervention should promote awareness and parent-child communication about CSA prevention among mothers of children with hearing loss.