Evidence map›Paper›PMID 25836004›Full record

Trial reportAmerican journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics2015

Hounsfield unit change in root and alveolar bone during canine retraction.

Feifei Jiang, Sean S-Y Liu, Zeyang Xia, Shuning Li, Jie Chen, Katherine S Kula, George Eckert

Open access · greenAbstract readComparative StudyRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
0.8field-weighted citation impact, top 28% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed, 11 citations in OpenAlex.

  1. Trial
  2. Article
  3. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 2 countries.

Feifei JiangPostgraduate student, Department of Mechanical Engineering, Indiana University-Purdue University, Indianapolis, Ind.
Sean S-Y LiuAssistant professor, Department of Orthodontics and Oral Facial Genetics, Indiana University, Indianapolis, Ind.
Zeyang XiaAssociate professor, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences and Chinese University of Hong Kong, Hong Kong, China.
Shuning LiVisiting assistant professor, Department of Mechanical Engineering, Indiana University-Purdue University, Indianapolis, Ind.
Jie ChenProfessor and chair, Department of Mechanical Engineering, Indiana University-Purdue University, Indianapolis, Ind; professor, Department of Orthodontics and Oral Facial Genetics, Indiana University, Indianapolis, Ind. Electronic address: jchen3@iupui.edu.
Katherine S KulaProfessor and chair, Department of Orthodontics and Oral Facial Genetics, Indiana University, Indianapolis, Ind.
George EckertBiostatistician supervisor, Department of Biostatistics, Indiana University, Indianapolis, Ind.
Chinese University of Hong Kong · CNChinese Academy of Sciences · CNIndiana University – Purdue University Indianapolis · US

Funding

Evaluation of Canine Retraction StrategiesR01DE018668 · NIDCR · INDIANA UNIVERSITY INDIANAPOLIS · PI CHEN, JIE · 2009 to 2012
$1.2M
NIDCR NIH HHS 1R01DE018668NIDCR NIH HHS R01 DE018668
6 · The paper itself

Abstract

introductionThe objective of this study was to determine the Hounsfield unit (HU) changes in the alveolar bone and root surfaces during controlled canine retractions.

methodsEighteen maxillary canine retraction patients were selected for this split-mouth design clinical trial. The canines in each patient were randomly assigned to receive either translation or controlled tipping treatment. Pretreatment and posttreatment cone-beam computed tomography scans of each patient were used to determine tooth movement direction and HU changes. The alveolar bone and root surface were divided into 108 divisions, respectively. The HUs in each division were measured. Mixed-model analysis of variance was applied to test the HU change distribution at the P <0.05 significance level.

resultsThe HU changes varied with the directions relative to the canine movement. The HU reductions occurred at the root surfaces. Larger reductions occurred in the divisions that were perpendicular to the moving direction. However, HUs decreased in the alveolar bone in the moving direction. The highest HU reduction was at the coronal level.

conclusionsHU reduction occurs on the root surface in the direction perpendicular to tooth movement and in the alveolar bone in the direction of tooth movement when a canine is retracted.

Indexed as

AdolescentAdultAlveolar ProcessBone DensityChildCone-Beam Computed TomographyCuspidFemaleHumansImage Processing, Computer-AssistedImaging, Three-DimensionalMaleMiddle AgedOrthodontic Space ClosureOrthodontic WiresProspective Studies

Identifiers

PMID25836004
PMCPMC4385197
OpenAlexW2171885290

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.