PDF(Pubmed)
Abstract：
BACKGROUND: Despite the popularity of clear aligners, their predictability has not been assessed adequately. Moreover, no study has investigated their effects on numerous dentomaxillary variables. Therefore, this study was conducted for the first time, assessing several new or controversial items. The aim of the study was to evaluate the effects of clear aligners on the vertical position of the molar teeth and the vertical and sagittal relationships of the face.
METHODS: This preliminary retrospective before-after non-randomized clinical trial was performed on 168 observations of 84 patients (33.60±9.28 years, 54 females) treated with 0.75mm Invisalign appliances. Pretreatment and posttreatment values were measured for: mandibular plane angle, occlusal plane angle, Y-Axis, ANB, facial angle, lower anterior facial height, overbite, and the distances of the molars from the palate and mandibular plane were measured. The alterations in parameters caused by treatment (delta values) were calculated for each measurement. Effects of treatment and some parameters on delta values were analyzed statistically (α=0.05).
RESULTS: Mean±SD of ΔMP-FH, ΔOP-FH, ΔY-Axis, ΔLAFH, ΔNPog-FH, ΔANB, ΔOverbite, ΔSNB, Δ6-PP, Δ7-PP, Δ6-MP, and Δ7-MP were respectively 0.11±1.61, 0.80±1.56, 0.15±1.18, 0.07±0.91, -0.22±1.25, 0.03±0.62, 0.04±1.15, -0.06±1.14, -0.36±0.94, -0.32±1.14, 0.19±0.96, 0.18±1.10. Only the alterations in OP-FH, 6-PP, and 7-PP were significant (P≤0.011). Age, sex, treatment duration, or pretreatment mandibular plane angle were not correlated with any delta values. However, the pretreatment occlusal plane angle was negatively correlated with ΔOP-FH and ΔY-Axis. Crowding was correlated negatively with ΔOP-FH and ΔY-Axis and positively with ΔNPog-FH. Overjet was negatively correlated with ΔANB and ΔOverbite (P≤0.035).
CONCLUSIONS: Invisalign intruded first/second maxillary molars and increased the occlusal plane angle. Age, sex, and treatment duration were not correlated with post-treatment anatomic alterations.
METHODS: This preliminary retrospective before-after non-randomized clinical trial was performed on 168 observations of 84 patients (33.60±9.28 years, 54 females) treated with 0.75mm Invisalign appliances. Pretreatment and posttreatment values were measured for: mandibular plane angle, occlusal plane angle, Y-Axis, ANB, facial angle, lower anterior facial height, overbite, and the distances of the molars from the palate and mandibular plane were measured. The alterations in parameters caused by treatment (delta values) were calculated for each measurement. Effects of treatment and some parameters on delta values were analyzed statistically (α=0.05).
RESULTS: Mean±SD of ΔMP-FH, ΔOP-FH, ΔY-Axis, ΔLAFH, ΔNPog-FH, ΔANB, ΔOverbite, ΔSNB, Δ6-PP, Δ7-PP, Δ6-MP, and Δ7-MP were respectively 0.11±1.61, 0.80±1.56, 0.15±1.18, 0.07±0.91, -0.22±1.25, 0.03±0.62, 0.04±1.15, -0.06±1.14, -0.36±0.94, -0.32±1.14, 0.19±0.96, 0.18±1.10. Only the alterations in OP-FH, 6-PP, and 7-PP were significant (P≤0.011). Age, sex, treatment duration, or pretreatment mandibular plane angle were not correlated with any delta values. However, the pretreatment occlusal plane angle was negatively correlated with ΔOP-FH and ΔY-Axis. Crowding was correlated negatively with ΔOP-FH and ΔY-Axis and positively with ΔNPog-FH. Overjet was negatively correlated with ΔANB and ΔOverbite (P≤0.035).
CONCLUSIONS: Invisalign intruded first/second maxillary molars and increased the occlusal plane angle. Age, sex, and treatment duration were not correlated with post-treatment anatomic alterations.
摘要：
背景：尽管清晰的对准器很受欢迎，他们的可预测性没有得到充分评估。此外，没有研究调查它们对许多牙颌变数的影响.因此,这项研究是第一次进行，评估几个新的或有争议的项目。该研究的目的是评估清晰的矫正器对磨牙的垂直位置以及面部的垂直和矢状关系的影响。
方法：这项初步的回顾性非随机前后临床试验是对84例患者的168个观察结果进行的（33.60±9.28年，54名女性）用0.75毫米Invisalign矫治器处理。测量治疗前和治疗后的值：下颌平面角，咬合平面角度，Y轴,ANB,面部角度,较低的前面部高度，过位,并测量了磨牙与腭和下颌平面的距离。对于每次测量,计算由处理引起的参数变化(δ值)。对治疗效果和一些参数对delta值的影响进行统计学分析(α=0.05)。
结果：ΔMP-FH的平均值±SD，ΔOP-FH,ΔY-轴,ΔLAFH,ΔNPog-FH,ΔANB,Δ重叠,ΔSNB,Δ6-PP,Δ7-PP,Δ6-MP,Δ7-MP分别为0.11±1.61、0.80±1.56、0.15±1.18、0.07±0.91、-0.22±1.25、0.03±0.62、0.04±1.15、-0.06±1.14、-0.36±0.94、-0.32±1.14、0.19±0.96、0.18±1.10。只有OP-FH的改变，6-PP,7-PP差异有统计学意义(P≤0.011)。年龄,性别,治疗持续时间,或预处理下颌平面角与任何delta值无关。然而,治疗前咬合面角与ΔOP-FH和ΔY-轴呈负相关。拥挤与ΔOP-FH和ΔY-轴呈负相关，与ΔNPog-FH呈正相关。过度喷射与ΔANB和Δ过度咬合呈负相关(P≤0.035)。
结论：Invisalign侵入第一/第二上颌磨牙并增加咬合平面角度。年龄,性别,和治疗持续时间与治疗后的解剖改变无关。
方法：这项初步的回顾性非随机前后临床试验是对84例患者的168个观察结果进行的（33.60±9.28年，54名女性）用0.75毫米Invisalign矫治器处理。测量治疗前和治疗后的值：下颌平面角，咬合平面角度，Y轴,ANB,面部角度,较低的前面部高度，过位,并测量了磨牙与腭和下颌平面的距离。对于每次测量,计算由处理引起的参数变化(δ值)。对治疗效果和一些参数对delta值的影响进行统计学分析(α=0.05)。
结果：ΔMP-FH的平均值±SD，ΔOP-FH,ΔY-轴,ΔLAFH,ΔNPog-FH,ΔANB,Δ重叠,ΔSNB,Δ6-PP,Δ7-PP,Δ6-MP,Δ7-MP分别为0.11±1.61、0.80±1.56、0.15±1.18、0.07±0.91、-0.22±1.25、0.03±0.62、0.04±1.15、-0.06±1.14、-0.36±0.94、-0.32±1.14、0.19±0.96、0.18±1.10。只有OP-FH的改变，6-PP,7-PP差异有统计学意义(P≤0.011)。年龄,性别,治疗持续时间,或预处理下颌平面角与任何delta值无关。然而,治疗前咬合面角与ΔOP-FH和ΔY-轴呈负相关。拥挤与ΔOP-FH和ΔY-轴呈负相关，与ΔNPog-FH呈正相关。过度喷射与ΔANB和Δ过度咬合呈负相关(P≤0.035)。
结论：Invisalign侵入第一/第二上颌磨牙并增加咬合平面角度。年龄,性别,和治疗持续时间与治疗后的解剖改变无关。
