Prenatal craniofacial abnormalities: from ultrasonography to three‐dimensional printed models

2019 ◽  
Vol 54 (6) ◽  
pp. 835-836 ◽  
Author(s):  
R. Nicot ◽  
C. Druelle ◽  
E. Hurteloup ◽  
J.‐M. Levaillant
Keyword(s):  
Three Dimensional ◽  
Craniofacial Abnormalities

Prefabricated Implants or Grafts with Reverse Models of Three-Dimensional Mirror-Image Templates for Reconstruction of Craniofacial Abnormalities

1999 ◽  
Vol 104 (5) ◽  
pp. 1413-1418 ◽  
Author(s):  
Sophia C. N. Chang ◽  
Yu-Fang Liao ◽  
Li-Man Hung ◽  
Ching-Shiow Tseng ◽  
Jung-Hsiang Hsu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Mirror Image ◽  
Craniofacial Abnormalities ◽  
Image Templates

scholarly journals VP17.07: Quantification of fetal craniofacial abnormalities in Trisomy 21 and 18 from three‐dimensional ultrasound scans

2021 ◽  
Vol 58 (S1) ◽  
pp. 171-171
Author(s):  
A.E. Clark ◽  
R. Sivera ◽  
A. Dall'Asta ◽  
S. Schievano ◽  
C. Lees
Keyword(s):  
Trisomy 21 ◽  
Three Dimensional ◽  
Craniofacial Abnormalities

scholarly journals The Use of Virtual Surgical Planning in Total Facial Skeletal Reconstruction of Treacher Collins Syndrome: A Case Report

2018 ◽  
Vol 11 (3) ◽  
pp. 230-237 ◽  
Author(s):  
Yifan Guo ◽  
Joseph Lopez ◽  
Robin Yang ◽  
Alexandra Macmillan ◽  
Amir H. Dorafshar
Keyword(s):  
Case Report ◽  
Orthognathic Surgery ◽  
Surgical Planning ◽  
Three Dimensional ◽  
Treacher Collins Syndrome ◽  
Computer Assisted ◽  
Craniofacial Abnormalities ◽  
Virtual Surgical Planning ◽  
Facial Harmony ◽  
Skeletal Reconstruction

Facial skeletal reconstruction of patients with severe Treacher Collins syndrome (TCS) requires correction of both midface and mandibular deficiencies. Implementing virtual surgical planning can provide an accurate three-dimensional analysis of craniofacial abnormalities, creating calvarial donors that match the anatomy of the desired malar augmentation and facilitating bimaxillary movements, positioning, and fixation in orthognathic surgery. We present a case of an 18-year-old patient with TCS, who underwent staged zygomaticomaxillary reconstruction and double-jaw osteotomy with sliding genioplasty, using computer-assisted surgical planning. Following these operations, the patient achieved not only improved facial harmony but also class I occlusion.

Malformazioni dell'orecchio nelle anomalie congenite cranio-facciali

2003 ◽  
Vol 16 (3) ◽  
pp. 411-420 ◽  
Author(s):  
F. Calzolari ◽  
E. Sarti ◽  
A. Sensi ◽  
G. Garani ◽  
L. Clauser ◽  
...  
Keyword(s):  
High Resolution ◽  
Facial Nerve ◽  
Inner Ear ◽  
Three Dimensional ◽  
Petrous Bone ◽  
Complete Characterization ◽  
Craniofacial Abnormalities ◽  
High Resolution Ct ◽  
Inner Ear Malformations ◽  
Ear Malformations

The aim of this study is to describe external, middle and inner ear malformations in children with congenital craniofacial abnormalities. Seventeen patients with craniofacial and external ear anomalies, aged between 12 days and 15 years (mean 3.4 years), were studied. The majority of children had conductive hearing loss. High-resolution CT of the petrous bone was performed in all cases; in 9 cases three-dimensional reconstructions were done. For each child CT findings of external, middle, inner ear, facial nerve and skull base were analysed. Ear malformations have been correlated with anomalies of the auricle. The most serious auricular anomalies were more frequently associated with external auditory canal atresia, dysplasia of the tympanic cavity and malleo-incudal joint and aberration of the mastoid segment of the facial nerve. These anomalies are probably related through a common embryological origin. Inner ear malformations were diagnosed more rarely, but we emphasize that these malformations are more frequent in “syndromic” forms with craniofacial abnormalities rather than in isolated anomalies of the auricle; it is very important because inner ear abnormalities are considered a contraindication to functional surgery in patients with atresia. Diagnostic imaging is useful for an early and complete characterization of the craniofacial and ear malformations; a precise analysis of the ear abnormalities is necessary to give an indication for the eventual audiological treatment. High-resolution CT is the method of choice for the analysis of the external and middle ear; CT and MR should be integrated for the study of the inner ear and facial nerve. CT and MR are helpful to determine the extent of craniofacial abnormalities; MR should be done when encephalic malformations are suspected. Finally, three-dimensional CT is useful for the maxillofacial surgeon to plan surgical treatment.

The orbit of Pluto over a long interval of time

1966 ◽  
Vol 25 ◽  
pp. 227-229 ◽  
Author(s):  
D. Brouwer
Keyword(s):  
Periodic Orbit ◽  
Numerical Integration ◽  
Restricted Problem ◽  
Three Dimensional ◽  
The Third ◽  
Circular Restricted Problem ◽  
Resonance Relation

The paper presents a summary of the results obtained by C. J. Cohen and E. C. Hubbard, who established by numerical integration that a resonance relation exists between the orbits of Neptune and Pluto. The problem may be explored further by approximating the motion of Pluto by that of a particle with negligible mass in the three-dimensional (circular) restricted problem. The mass of Pluto and the eccentricity of Neptune's orbit are ignored in this approximation. Significant features of the problem appear to be the presence of two critical arguments and the possibility that the orbit may be related to a periodic orbit of the third kind.

Conformation of Ribosomes from Escherichia Coli

1974 ◽  
Vol 32 ◽  
pp. 210-211
Author(s):  
M. Boublik ◽  
W. Hellmann ◽  
F. Jenkins
Keyword(s):  
Binding Sites ◽  
Ribosomal Proteins ◽  
Fluorescent Dyes ◽  
Protein Biosynthesis ◽  
Three Dimensional ◽  
Spatial Arrangement ◽  
Dimensional Structure ◽  
Complete Understanding ◽  
And Function

The present knowledge of the three-dimensional structure of ribosomes is far too limited to enable a complete understanding of the various roles which ribosomes play in protein biosynthesis. The spatial arrangement of proteins and ribonuclec acids in ribosomes can be analysed in many ways. Determination of binding sites for individual proteins on ribonuclec acid and locations of the mutual positions of proteins on the ribosome using labeling with fluorescent dyes, cross-linking reagents, neutron-diffraction or antibodies against ribosomal proteins seem to be most successful approaches. Structure and function of ribosomes can be correlated be depleting the complete ribosomes of some proteins to the functionally inactive core and by subsequent partial reconstitution in order to regain active ribosomal particles.

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