Geometric morphometric analysis of growth patterns among facial types.
Geometric morphometric analysis of growth patterns among facial types.
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DOI：
10.1016/j.ajodo.2020.04.038
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发表时间：
2021-09
期刊：
影响因子：
--
通讯作者：
Sherwood RJ
中科院分区：
文献类型：
--
作者：
Knigge RP;McNulty KP;Oh H;Hardin AM;Leary EV;Duren DL;Valiathan M;Sherwood RJ
垂直面部分化的极端模式对临床医生来说非常重要，因为它们与牙错和口面复合体的功能问题有关。了解与垂直面部分化相关的生长模式对临床医生提供最佳治疗至关重要。本研究利用颅面生长联盟研究的纵向、侧位脑电图，评估和比较了儿童期到成年期三种垂直面部分化类型的生长模式。研究对象（183名女性，188名男性）根据成年下颌平面角（MPA）分为三种面部类型：超发散型（MPA >39°，n = 40）、非收敛型（28°≤MPA≤39°，n = 216）和低发散型（MPA <28°，n = 115）。每个人在6岁到20岁之间都做过5次脑电图。每张脑电图上的一组36个头颅测量标志被数字化。标记配置叠加，对齐前颅底的5个同源标记，并缩放为单位质心大小。使用多元回归计算每个面部类型和性别组合的生长轨迹。在不同的面部类型中发现了不同的生长轨迹，在正常和低发散的生长模式中发现了更多的相似之处，而不是与超发散组共享。通过使用几何形态计量学方法，识别了与垂直面部分化相关的面部生长新模式。超发散生长表现为上颌下颌复合体相对于前颅底向下旋转，以及下前面部的相对生长增加。相反，正常收敛组和低发散组的上颌骨相对于前颅底的定位稳定，下颌骨向前旋转。上颌和下颌骨的超发散随着年龄的增长而变短，且位置相对后移。本研究表明，上颌骨的生长发育，特别是上颌骨的生长和定位受限，会导致II类错颌畸形的潜在风险增加。未来的工作将研究每一种面部分化分类中的生长模式。
Extreme patterns of vertical facial divergence are of great importance to clinicians because of their association with dental malocclusion and functional problems of the orofacial complex. Understanding the growth patterns associated with vertical facial divergence is critical for clinicians to provide optimal treatment. This study evaluates and compares growth patterns from childhood to adulthood among 3 classifications of vertical facial divergence using longitudinal, lateral cephalograms from the Craniofacial Growth Consortium Study. Participants (183 females, 188 males) were classified into 1 of 3 facial types on the basis of their adult mandibular plane angle (MPA): hyperdivergent (MPA >39°; n = 40), normodivergent (28° ≤ MPA ≤ 39°; n = 216), and hypodivergent (MPA <28°; n = 115). Each individual had 5 cephalograms between ages 6 and 20 years. A set of 36 cephalometric landmarks were digitized on each cephalogram. Landmark configurations were superimposed to align 5 homologous landmarks of the anterior cranial base and scaled to unit centroid size. Growth trajectories were calculated using multivariate regression for each facial type and sex combination. Divergent growth trajectories were identified among facial types, finding more similarities in normodivergent and hypodivergent growth patterns than either share with the hyperdivergent group. Through the use of geometric morphometric methods, new patterns of facial growth related to vertical facial divergence were identified. Hyperdivergent growth exhibits a downward rotation of the maxillomandibular complex relative to the anterior cranial base, in addition to the increased relative growth of the lower anterior face. Conversely, normodivergent and hypodivergent groups exhibit stable positioning of the maxilla relative to the anterior cranial base, with the forward rotation of the mandible. Furthermore, the hyperdivergent maxilla and mandible become relatively shorter and posteriorly positioned with age compared with the other groups. This study demonstrates how hyperdivergent growth, particularly restricted growth and positioning of the maxilla, results in a higher potential risk for Class II malocclusion. Future work will investigate growth patterns within each classification of facial divergence.
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DOI：
10.1002/ar.22918
发表时间：
2014-07-01
影响因子：
2
作者：
Nahhas, Ramzi W.;Valiathan, Manish;Sherwood, Richard J.
通讯作者：
Sherwood, Richard J.
影响因子：
3
作者：
GOWER, JC
通讯作者：
GOWER, JC
DOI：
10.1016/s0889-5406(94)70036-2
发表时间：
1994-08-01
影响因子：
3
作者：
BISHARA, SE;TREDER, JE;JAKOBSEN, JR
通讯作者：
JAKOBSEN, JR
影响因子：
3.2
作者：
Mitteroecker, P;Gunz, P;Bookstein, FL
通讯作者：
Bookstein, FL
影响因子：
3.1
作者：
Han, Seong Ho;Park, Young-Seok
通讯作者：
Park, Young-Seok