Lo Russo Lucio, Zhurakivska Khrystyna, Montaruli Graziano, Salamini Angelo, Gallo Crescenzio, Troiano Giuseppe, Ciavarella Domenico
Department of Clinical and Experimental Sciences, University of Foggia, Via Rovelli, 50, 71122, Foggia, Italy.
Sintesi Sud srl, Ariano Irpino, Avellino, Italy.
Odontology. 2018 Oct;106(4):414-421. doi: 10.1007/s10266-018-0370-5. Epub 2018 Jun 12.
Orthodontic treatment has important correlations with periodontal changes. Various mechanical and biological factors are involved in determining such changes, but anatomical and morphological variables, generally addressed as periodontal biotype, play a key role. In measurement of such modifications, digital and non-contact reverse engineering technologies may be of tremendous advantage. The aim of this study is to retrospectively evaluate, in a series of digitized dental casts, some of the parameters addressing periodontal biotype and correlate them to extent and direction of tooth movement. Pre- (T0) and post-treatment (T1) dental casts of 22 patients were scanned by 3Shape TRIOS 3® scanner. A number of variables (crown ratio, gingival margin position, gingival contour, papillae position, gingival scallop) were investigated and their variations calculated after digital measurements on single casts at T0 and T1, or after direct measurement (T1 vs T0) on the superimposition and alignment of digital models. Univariate and multivariate statistics were then performed. No significant correlation was detected between the sagittal or vertical movement of dental crown and displacement of the gingival margin. On the other hand, vestibular gingival contour resulted significantly altered by vestibular and extrusion movements. Further studies are needed to ascertain the differential effect of bone and soft tissue on such modifications. The relationship between orthodontic treatment and the periodontium overcomes the consideration of gingival recession and includes all the concepts of periodontal biotype with its characteristics. Digital technologies and non-contact reverse engineering techniques now available have the potential to allow a more precise definition of such a relationship.
正畸治疗与牙周变化有着重要的关联。多种机械和生物学因素参与决定这些变化，但通常被视为牙周生物型的解剖学和形态学变量起着关键作用。在测量这些改变时，数字和非接触式逆向工程技术可能具有巨大优势。本研究的目的是回顾性评估一系列数字化牙模中的一些牙周生物型参数，并将它们与牙齿移动的程度和方向相关联。22名患者的治疗前（T0）和治疗后（T1）牙模由3Shape TRIOS 3®扫描仪进行扫描。研究了一些变量（冠根比、牙龈边缘位置、牙龈轮廓、乳头位置、牙龈扇贝形），并在T0和T1时对单个牙模进行数字测量后，或在数字模型叠加和对齐后进行直接测量（T1对比T0）后计算其变化。然后进行单变量和多变量统计分析。未检测到牙冠的矢状或垂直移动与牙龈边缘位移之间存在显著相关性。另一方面，前庭牙龈轮廓因前庭和伸长移动而发生显著改变。需要进一步研究以确定骨组织和软组织对这些改变的不同影响。正畸治疗与牙周组织之间的关系不仅涉及牙龈退缩，还涵盖了牙周生物型及其特征的所有概念。现有的数字技术和非接触式逆向工程技术有可能更精确地定义这种关系。
