Maxillary transverse expansion

2021 ◽  
Author(s):  
Samantha Jayne Marti
Keyword(s):  
Transverse Expansion

Soft-Tissue Profile Changes during Widening and Protraction of the Maxilla in Patients with Cleft Lip and Palate Compared with Normal Growth and Development

1993 ◽  
Vol 30 (5) ◽  
pp. 454-468 ◽  
Author(s):  
Rolf S. Tindlund ◽  
Per Rygh
Keyword(s):  
Soft Tissue ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Lower Lip ◽  
Maxillary Protraction ◽  
Transverse Expansion ◽  
Short Period ◽  
Soft Tissue Profile ◽  
Lateral Cephalograms ◽  
Maxillary Deficiency

During the last 15 years, cleft lip and palate (CLP) patients with maxillary deficiency in the care of the Bergen CLP team have undergone an interceptive orthopedic treatment phase during the deciduous and mixed dentition period. The present study includes 68 patients who received maxillary transverse expansion by use of a modified quad-helix appliance and 98 cases given maxillary protraction by a facial mask. All cases were treated until an acceptable normal occlusion was attained. Lateral cephalograms were taken immediately before and after the active treatment periods. Sagittal changes of the soft-tissue profile during transverse expansion and protraction were analyzed separately for unilateral complete cleft lip and palate (UCLP) patients and bilateral complete cleft lip and palate (BCLP) patients. The soft-tissue profiles of the groups were compared to growth changes of noncleft age-matched children (NORM group). During the short period of maxillary transverse expansion (mean period, 3.5 months) no significant change of the soft-tissue profile was found, except in the protrusion of the lower lip in the BCLP group. During the period of maxillary protraction (mean periods, 12 months in the UCLP group and 15 months in the BCLP group) the soft-tissue profile improved significantly by reducing the characteristic tendency towards a concave profile in CLP patients with maxillary deficiency. Significant Increases of the sagittal maxillomandlbular lip relation (angle SS-N-SM: mean Increase, 2.5 degrees) and the Holdaway-angle (H-angle: mean increase, 3.0 degrees) were found to be similar in the UCLP and BCLP groups. However, the use of different reference lines for evaluation of treatment effects upon the soft-tissue profile resulted in conflicting findings suggesting that anteriorly situated reference lines are more suitable for the evaluation of CLP patients. Thus, the esthetic line (E.line) indicated a favorable position of the lips after treatment; the subspinale-pogonlon line (ss.pg) revealed an Improved soft-tissue profile; the soft-tissue-facial line (N.PG) showed a retruded nose and upper lip; whereas basal references such as the nasion-sella line (NSL) and the occlusal-line perpendicular (OLP) mainly showed major differences between the CLP groups and the NORM groups.

scholarly journals Transverse Expansion of Contracted Maxillary Dental Arch in Patients with Cleft Lip and Palate-Application of Surgically Assisted Maxillary Expansion-

2007 ◽  
Vol 17 (3) ◽  
pp. 206-212
Author(s):  
KAZUHIRO ONO ◽  
TADAHARU KOBAYASHI ◽  
CHIKARA SAITO ◽  
JUN-ICHI FUKUDA ◽  
RITSUO TAKAGI ◽  
...  
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Dental Arch ◽  
Maxillary Expansion ◽  
Transverse Expansion

scholarly journals Changes in clinical crown height as a result of transverse expansion of the maxilla in adults

2005 ◽  
Vol 27 (2) ◽  
pp. 121-128 ◽  
Author(s):  
Turi Bassarelli ◽  
Michel Dalstra ◽  
Birte Melsen
Keyword(s):  
Crown Height ◽  
Transverse Expansion

Intraoral craniofacial manipulation by using MRI appliance

2002 ◽  
Vol 26 (1) ◽  
pp. 21-28
Author(s):  
Noor Al-Sulaiti ◽  
G. White
Keyword(s):  
Class I ◽  
Orthodontic Appliances ◽  
Facial Bones ◽  
Correct Position ◽  
Transverse Expansion ◽  
Fixed Orthodontic Appliances ◽  
The Face ◽  
Maxillary Arch

This case illustrates the use of the Maxillary-Rotation-Impaction Appliance (MRI) to rotate and impact the maxilla. When this maneuver was completed the transverse expansion screw widened the maxillary arch. The case was completed using fixed orthodontic appliances. The result is that the facial bones appear in the correct position and the teeth are correctly positioned in the face with a class I occlusion.

scholarly journals Transverse expansion of the electron sheath during laser acceleration of protons

2017 ◽  
Vol 24 (12) ◽  
pp. 123109
Author(s):  
K. Svensson ◽  
F. Mackenroth ◽  
L. Senje ◽  
A. Gonoskov ◽  
C. Harvey ◽  
...  
Keyword(s):  
Transverse Expansion ◽  
Laser Acceleration

scholarly journals The elastic stability of a corrugated plate

1926 ◽  
Vol 111 (757) ◽  
pp. 144-167 ◽  
Keyword(s):  
Critical Stress ◽  
Elastic Stability ◽  
The Other ◽  
Poisson's Ratio ◽  
Perpendicular Direction ◽  
Practical Case ◽  
Numerical Work ◽  
Normal Case ◽  
Transverse Expansion ◽  
Preliminary Work

1. Introduction and Summary .—This paper deals with the elastic stability of a corrugated plate under thrust along its generators. Besides the assumption, common to all such problems, that the plate is thin, it is supposed that the depth of a bay ( d , fig. 1) is a small multiple of h , the semi-thickness, and that the transverse expansion that is the usual accompaniment of a longitudinal thrust, is prevented by a thrust in a perpendicular direction. The equations derived in §§ 2-7 are then soluble, and the critical stress in any case can be found from an equation expressing that an infinite determinant is zero. The numerical work that has been done has been limited to the two cases in which d = 10 h and d = 5 h , respectively. As a preliminary, in §§ 8-11, it has been supposed that σ, Poisson’s ratio, is zero. The equations are greatly simplified by this supposition, and results can easily be obtained which are a valuable guide to the more complicated arithmetic of the normal case in which σ does not vanish. In particular, this preliminary work is used to find the “favourite type of distortion” (that possible under the least stress) in the other case: it can be seen that the favourite types are the same whether a is or is not zero. The necessary exploration is therefore done for σ = 0, and the arithmetic in the more practical case, in which we suppose that σ = ¼, is confined to the calculation of stresses causing definite modes of distortion.

Transverse expansion and effective radii of sources in high energy collisions

1992 ◽  
Vol 293 (3-4) ◽  
pp. 275-281 ◽  
Author(s):  
B.R. Schlei ◽  
U. Ornik ◽  
M. Plümer ◽  
R.M. Weiner
Keyword(s):  
High Energy ◽  
Transverse Expansion ◽  
High Energy Collisions

Hand-held model of a sarcomere to illustrate the sliding filament mechanism in muscle contraction

2009 ◽  
Vol 33 (4) ◽  
pp. 297-301 ◽  
Author(s):  
Karnyupha Jittivadhna ◽  
Pintip Ruenwongsa ◽  
Bhinyo Panijpan
Keyword(s):  
Muscle Contraction ◽  
Striated Muscle ◽  
Computer Graphic ◽  
Alternative Conceptions ◽  
Two Dimensional ◽  
Thin Filaments ◽  
Transverse Expansion ◽  
Thin Elements ◽  
Common Items ◽  
Graphic Displays

From our teaching of the contractile unit of the striated muscle, we have found limitations in using textbook illustrations of sarcomere structure and its related dynamic molecular physiological details. A hand-held model of a striated muscle sarcomere made from common items has thus been made by us to enhance students' understanding of the sliding filament mechanism as well as their appreciation of the spatial arrangements of the thick and thin filaments. The model proves to be quite efficacious in dispelling some alternative conceptions held by students exposed previously only to two-dimensional textbook illustrations and computer graphic displays. More importantly, after being taught by this hand-held device, electronmicrographic features of the A and I bands, H zone, and Z disk can be easily correlated by the students to the positions of the thick and thin elements relatively sliding past one another. The transverse expansion of the sarcomere and the constancy of its volume upon contraction are also demonstrable by the model.

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