Three-dimensional analysis of positional plagiocephaly before and after molding helmet therapy in comparison to normal head growth

Objective The treatment of a positional head deformity in infancy is a controversial issue. The aim of this study was to explore the effects of helmet therapy on positional plagiocephaly and brachycephaly. Patients and Methods We determined cranial vault shape parameters in 348 healthy children during the second year of life, combined them with preexisting data from more than 400 subjects younger than 12 months, and related retrospectively the data of 1,531 children obtained before and after treatment with individual molding helmets to these newly generated normative values. Results The number of subjects with cranial vault asymmetry values > 97th percentile decreased by 85.5% from 1,361 before to 197 (p < 0.01) after helmet therapy, while the number of individuals with cranial vault asymmetry index values > 97th percentile declined by 87.7% from 1,353 to 167 (p < 0.01). Similarly, the number of infants with cranial index values > 97th percentile diminished by 66.8% from 885 to 294 (p < 0.01). Conclusions These findings do not finally prove, but they support the idea that helmet treatment is effective and meaningful in preventing permanent head deformities in infants with severe deformation. The normative anthropometric data generated in this study will allow investigating the natural course and effects of various therapies on infant cranial shape objectively.

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Three-dimensional analysis of facial morphology before and after orthognathic surgery

Journal of Cranio-Maxillofacial Surgery ◽

10.1016/s1010-5182(05)80201-x ◽

1990 ◽

Vol 18 (2) ◽

pp. 68-73 ◽

Cited By ~ 23

Author(s):

Tadaharu Kobayashi ◽

Ken Ueda ◽

Katsuhiko Honma ◽

Hitoshi Sasakura ◽

Kooji Hanada ◽

...

Keyword(s):

Dimensional Analysis ◽

Orthognathic Surgery ◽

Three Dimensional ◽

Facial Morphology ◽

Before And After

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Natural-Course Evaluation of Infants with Positional Severe Plagiocephaly Using a Three-Dimensional Scanner in Japan: Comparison with Those Who Received Cranial Helmet Therapy

Journal of Clinical Medicine ◽

10.3390/jcm10163531 ◽

2021 ◽

Vol 10 (16) ◽

pp. 3531

Author(s):

Takanori Noto ◽

Nobuhiko Nagano ◽

Risa Kato ◽

Shin Hashimoto ◽

Katsuya Saito ◽

...

Keyword(s):

Three Dimensional ◽

Course Evaluation ◽

Natural Course ◽

3D Scanner ◽

Positional Plagiocephaly ◽

Helmet Therapy ◽

Matched Case ◽

The Difference ◽

Matched Case Control Study ◽

Control Study

This study aimed to clarify the natural course of positional plagiocephaly using a three-dimensional (3D) scanner and investigate the effectiveness of cranial helmet therapy (CHT). One hundred infants with severe plagiocephaly who visited our institutions between April 2020 and March 2021 were included. Cranial shape was measured using an Artec Eva 3D scanner. A cranial asymmetry (CA) >12 mm was diagnosed as severe plagiocephaly. An infant whose CA subsided to <12 mm was considered to have improved naturally or by CHT. The difference in CA between the second and initial scans was defined as the improvement value (median scan interval was two months). In the natural-course group comprising 56 infants with severe plagiocephaly, 37 (66%) with a median CA of 15.6 mm exhibited no improvement after two months. In the scan age- and evaluation interval-matched case-control study, the CA value in the CHT group improved by three times that in the natural-course group (−4.6 mm [n = 33] vs. −1.55 mm [n = 24], p < 0.001). Severe plagiocephaly did not improve naturally in 66% of the cases. Therefore, CHT should be considered if the CA is >12 mm on the initial evaluation.

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278 THE THREE-DIMENSIONAL ANALYSIS OF KINEMATIC GAIT PARAMETERS OF SUBJECTS WITH GONARTHROSIS BEFORE AND AFTER TOTAL KNEE REPLACEMENT

Parkinsonism & Related Disorders ◽

10.1016/s1353-8020(10)70279-0 ◽

2010 ◽

Vol 16 ◽

pp. S79

Author(s):

K. Ogrodzka ◽

T. Niedźwiedzki ◽

W. Chwała

Keyword(s):

Total Knee Replacement ◽

Dimensional Analysis ◽

Knee Replacement ◽

Three Dimensional ◽

Gait Parameters ◽

Before And After ◽

Total Knee

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In situ investigation of the primary recrystallization of alpha titanium in HVEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100110313 ◽

1978 ◽

Vol 36 (1) ◽

pp. 634-635

Author(s):

S. Naka ◽

R. Penelle ◽

R. Valle

Keyword(s):

Dimensional Analysis ◽

Texture Evolution ◽

Cold Work ◽

Three Dimensional ◽

Primary Recrystallization ◽

Thin Foils ◽

In Situ Investigation ◽

Grain Growth Model ◽

Alpha Titanium

The in situ experimentation technique in HVEM seems to be particularly suitable to clarify the processes involved in recrystallization. The material under investigation was unidirectionally cold-rolled titanium of commercial purity. The problem was approached in two different ways. The three-dimensional analysis of textures was used to describe the texture evolution during the primary recrystallization. Observations of bulk-annealed specimens or thin foils annealed in the microscope were also made in order to provide information concerning the mechanisms involved in the formation of new grains. In contrast to the already published work on titanium, this investigation takes into consideration different values of the cold-work ratio, the temperature and the annealing time.Two different models are commonly used to explain the recrystallization textures i.e. the selective grain growth model (Beck) or the oriented nucleation model (Burgers). The three-dimensional analysis of both the rolling and recrystallization textures was performed to identify the mechanismsl involved in the recrystallization of titanium.

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