机构地区:[1]军事口腔医学国家重点实验室,口腔疾病国家临床医学研究中心,陕西省口腔疾病临床医学研究中心,第四军医大学口腔医院正畸科,西安710032 [2]解放军第967医院口腔科,大连116000
出 处:《中华口腔正畸学杂志》2022年第4期191-195,共5页Chinese Journal of Orthodontics
基 金:中华口腔医学会青年临床科研基金(CSA-02020-01);国家口腔疾病临床医学研究中心2020年度专项课题A类项目(LCA202009)。
摘 要:目的比较不同设计压低量、不同厚度膜片、有无压低附件的隐形矫治器压低个别前牙时三维受力情况,以期为临床压低前牙提供参考。方法使用全牙列三维测力装置,以3种设计压低量(0.1mm、0.15mm和0.2mm),两种膜片厚度(0.625mm和0.75mm),有无附件为分组标准测量128副无托槽隐形矫治器压低右上中切牙的三维向受力情况。采用多因素方差分析探究以上3种因素对于矫治力的影响。结果隐形矫治器设计压低量不同、膜片厚度不同、有无附件,对于右上中切牙的垂直向受力都会产生有统计学意义的差异(P<0.001、P=0.015、P<0.001)。支抗邻牙未设计附件时,采用0.625mm膜片厚度,3种压低设计量在右上中切牙上产生的压低力分别是(1.38±0.19)N、(2.79±0.70)N、(2.64±0.43)N;当膜片厚度增加为0.75mm时,中切牙上产生的压低力(2.12±0.37)N、(4.44±0.56)N、(3.87±0.66)N。邻牙设计附件时,用0.625mm膜片厚度,3种压低设计量在右上中切牙上产生的压低力分别是(1.16±0.44)N、(1.90±1.17)N、(3.02±0.30)N;当膜片厚度增加为0.75mm时,中切牙上产生的压低力(0.78±0.43)N、(1.66±1.19)N、(3.03±0.59)N。不同设计压低量右上中切牙唇舌向受力差异有统计学意义(P=0.007);不同设计压低量、有无附件右上中切牙近远中向受力差异均有统计学意义(P<0.001、P=0.002)。结论设计压低量越大、膜片越厚右上中切牙垂直向受力越大;支抗邻牙放置固位附件承担更多支抗力,右上中切牙牙垂直向受力减小。这提示临床上压低前牙时,合理设计压低量、膜片厚度及附件位置,并同时关注压低产生的不希望的唇舌向近远中向受力.Objective The present study aim to compare the three-dimensional force system of clear aligners intruding individual anterior teeth in various conditions:different amount of intrusion.different thickness of the aligner and with/without attachments.for clinical application reference purposes.MethodsThree-dimensional force measurement device was used to measure the force delivery upon a complete dentition.The right maxillary central incisor cxperienced intrusive forces from 128 clear aligners,which were classified by three intrusive activations(0.1 mm.0.15 mm.0.2 mm).two kinds of thickness(0.625 mm.0.75 mm)and with or without attachments.Three-way classification ANOVA was used to analyze the relationship between these factors and orthodontic force.ResultsThe ANOVA revealed statistically significant effect from the amount of intrusive activation,aligner thickness and attachment on the vertical force component(P<0.001.P=0.015.P<0.001).The mean Fz values of the central incisor intruded from 0.1 mm to 0.2 mm were(1.38±0.19)N、(2.79±0.70)N、(2.64±0.43)Nfor0.625mm thicknessandwere(2.12±0.37)N、(4.44±0.56)N、(3.87±0.66)N for 0.75 mm thickness respectively without retentive attachments placed on adjacent anchorage teeth.Whereas the intrusion force was(1.16±0.44)N、(1.90±1.17)N、(3.02±0.30)N for 0.625 mm thickness and was 0.78.1.66.3.03 N when retentive attachments were placed on adjacent anchorage teeth.Meanwhile,there is a statistically significant effect of the intrusive activation on the sagittal force(Fy)component(P=O.007),as well as intrusive activation and attachment on the transverse force(Fx)component(P<0.001.P=0.002).ConclusionsThe clear aligners with higher intrusive activation and thicker material can generate greater vertical force.However,the vertical force components decrease significantly when retentive attachments were placed on adjacent anchorage teeth.This study indicates that orthodontists should design intrusive activation and thickness of clear aligners,as well as the location of attachm
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...