Study on the Effect of Implantation Site for Microimplant Anchorage on the Correction of Adult Gingival Smile
ZHANG Jinling
PAN Jie
HUANG Jiyan
Abstract：Objective To analyze the effect of implantation site for microimplant anchorage(MIA)on the correction of adult gingival smile.Methods A total of 118 patients with vertical hyperplasia of anterior maxillary alveolar bone who un-derwent MIA implantation from January 2019 to January 2022 were selected.The patients were divided into two groups accord-ing to the random number table method,among whom there were 3 cases of detachment in the intercentral incisor group(im-planted between maxillary central incisors)and 2 cases of detachment in the interlateral incisor group(implanted between maxillary central incisor and lateral incisor).Finally,56 cases in intercentral incisor group and 57 cases in interlateral incisor group were included.The clinical orthodontic effect of the two groups was compared at 12 months after operation.Results There was no significant difference in vertical gingival volume and anterior overbite difference between the two groups before and after treatment(P＞0.05).The upper incisor and sella nasion plane(UI-SN)and upper incisor-true horizontal plane(UI-T)before and after treatment in intercentral incisor group were higher than those in interlateral incisor group(P＜0.05).There was no significant difference in sella-nasion-A point angle(SNA),sella-nasion-B point angle(SNB),A point-nasion-B point angle(ANB),upper first permanent molar-sella nasion plane(U6-SN),upper incisor-palatal plane(UI-PP),upper first permanent molar-true horizontal plane(U6-T)and upper first permanent molar-palatal plane(U6-PP)between the two groups before and after treatment(P＞0.05).The difference value of root length before and after treatment in intercentral incisor group was greater than that in interlateral incisor group(P＜0.05).There were no significant differences in the length of central incisors,the probing depth of periodontal pocket,and gingival index between the two groups before and after treatment(P＞0.05).Conclusion The clinical symptoms of gingival smile could be improved when the maxillary ante-rior teeth were depressed by microimplants in different parts,but the root resorption of the anterior teeth implanted between the central and lateral incisors was less.
Keywords：Gingival smileImplantation siteMicro-implantAnchorage nailRoot resorptionTooth lengthHy-perplasiaGingival index
Publication Date：2025-02-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 71-76 )