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Maxillary anterior en masse retraction using different antero-posterior position of mini screw: a 3D finite element study.

Overview of attention for article published in Progress in Orthodontics, December 2016
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Title
Maxillary anterior en masse retraction using different antero-posterior position of mini screw: a 3D finite element study.
Published in
Progress in Orthodontics, December 2016
DOI 10.1186/s40510-016-0143-z
Pubmed ID
Authors

Zohreh Hedayati, Zohreh Hedayati, Mehrdad Shomali

Abstract

Nowadays, mini screws are used in orthodontic tooth movement to obtain maximum or absolute anchorage. They have gained popularity among orthodontists for en masse retraction of anterior teeth after first premolar extraction in maximum anchorage cases. The purpose of this study was to determine the type of anterior tooth movement during the time when force was applied from different mini screw placements to the anterior power arm with various heights. A finite element method was used for modeling maxillary teeth and bone structure. Brackets, wire, and hooks were also designed for modeling. Two appropriate positions for mini screw in the mesial and distal of the second premolar were designed as fixed nodes. Forces were applied from the mini screw to four different levels of anterior hook height: 0, 3, 6, and 9 mm. Initial tooth movement in eight different conditions was analyzed and calculated with ANSYS software. Rotation of anterior dentition was decreased with a longer anterior power arm and the mesial placement of the mini screw. Bodily movements occurred with the 9-mm height of the power arm in both mini screw positions. Intrusion or extrusion of the anterior teeth segment depended on the level of the mini screw and the edge of the power arm on the Z axis. According to the findings of this study, the best control in the sagittal plane during anterior en masse retraction was achieved by mesial placement of the mini screw and the 9-mm height of the anterior power arm. Where control in the vertical plane was concerned, distal placement of the mini screw with the 6-mm power arm height had minimum adverse effect on anterior dentition.

Twitter Demographics

The data shown below were collected from the profile of 1 tweeter who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 64 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Japan 1 2%
Germany 1 2%
Unknown 62 97%

Demographic breakdown

Readers by professional status Count As %
Student > Master 20 31%
Student > Postgraduate 13 20%
Other 5 8%
Student > Ph. D. Student 4 6%
Researcher 4 6%
Other 8 13%
Unknown 10 16%
Readers by discipline Count As %
Medicine and Dentistry 42 66%
Agricultural and Biological Sciences 2 3%
Materials Science 2 3%
Psychology 2 3%
Engineering 2 3%
Other 4 6%
Unknown 10 16%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 06 October 2016.
All research outputs
#6,131,204
of 8,482,675 outputs
Outputs from Progress in Orthodontics
#91
of 135 outputs
Outputs of similar age
#163,518
of 253,558 outputs
Outputs of similar age from Progress in Orthodontics
#6
of 10 outputs
Altmetric has tracked 8,482,675 research outputs across all sources so far. This one is in the 24th percentile – i.e., 24% of other outputs scored the same or lower than it.
So far Altmetric has tracked 135 research outputs from this source. They receive a mean Attention Score of 1.7. This one is in the 18th percentile – i.e., 18% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 253,558 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 30th percentile – i.e., 30% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 10 others from the same source and published within six weeks on either side of this one. This one has scored higher than 4 of them.