Lombardo Luca, Calabrò Michele, Squarci Virginia, Colonna Anna, Siciliani Giuseppe
Department of Orthodontics, University of Ferrara, Ferrara, Italy. Via Montebello 31, 44100 Ferrara, Italy.
Private Practise Via Carlo Pezzani, 37, 27058 Voghera PV.
J Clin Exp Dent. 2019 Jan 1;11(1):e97-e102. doi: 10.4317/jced.55399. eCollection 2019 Jan.
To assess the efficacy of a multibracket appliance-Straight-wire Mirabella (SWM) prescription-in terms of achieving the ideal first-, second- and third-order values proposed by Andrews.
A total sample of 46 Caucasian subjects was divided into two groups: 23 with class I malocclusion (Group 1), and 23 with class II malocclusion (Group 2). The treatment protocol involved fixed multibracket appliances-SWM prescription-for both groups, with the addition of class II elastics for Group 2. Values for ΔU1-PP, ΔIMPA, in-out, tip and torque were measured on digital scans, and the results obtained were compared with the ideal values proposed by Andrews.
Statistically significant differences were revealed between the entire sample and Andrews' values for: in-out on upper lateral incisors and upper canines; tip on the upper first premolars, upper second premolars, upper first molars and upper canines; and torque on the lower central incisors, lower lateral incisors, lower canines and lower first premolars. However, comparison of Groups 1 and 2 revealed statistically significant differences only at the lower lateral incisors. The use of class II elastics influenced ΔIMPA values, but not ΔU1-PP.
The efficacy of the multibracket appliance-SWM prescription-in expressing first- second- and, to a lesser extent, third-order information was demonstrated in both class I and class II malocclusions. Class II elastics only influenced the third-order expression on the lower lateral incisors and the ΔIMPA. Straight wire fixed appliances, prescription efficacy, Class I malocclusions, Class II malocclusions.
评估多托槽矫治器——直丝米拉贝拉（SWM）矫治方案——在实现安德鲁斯提出的理想一阶、二阶和三阶数值方面的疗效。
总共46名白种人受试者被分为两组：23名安氏I类错牙合患者（第1组）和23名安氏II类错牙合患者（第2组）。两组的治疗方案均包括使用固定多托槽矫治器——SWM矫治方案，第2组额外使用II类牵引。在数字化扫描上测量ΔU1-PP、ΔIMPA、唇舌向、倾斜和转矩值，并将所得结果与安德鲁斯提出的理想值进行比较。
整个样本与安德鲁斯的数值之间在以下方面存在统计学显著差异：上颌侧切牙和上颌尖牙的唇舌向；上颌第一前磨牙、上颌第二前磨牙、上颌第一磨牙和上颌尖牙的倾斜；以及下颌中切牙、下颌侧切牙、下颌尖牙和下颌第一前磨牙的转矩。然而，第1组和第2组的比较显示仅在下颌侧切牙处存在统计学显著差异。II类牵引的使用影响了ΔIMPA值，但不影响ΔU1-PP。
多托槽矫治器——SWM矫治方案——在表达一阶、二阶以及在较小程度上三阶信息方面的疗效在安氏I类和安氏II类错牙合中均得到了证实。II类牵引仅影响下颌侧切牙的三阶表达和ΔIMPA。直丝固定矫治器、矫治效果、安氏I类错牙合、安氏II类错牙合。
