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Research Article

JCDR. 2020; 11(3): 137-143


Comparative evaluation of conventional and mini-implants anchorage for en-masse retraction in Class II Division 1 malocclusion

Dr. Nadira Hassan, Dr. Saurav Kumar, Dr. DevleenaBhowmick, Dr. Ravi Anjan,Dr. Krishna Kumar, Dr. Atul Kumar.


Abstract

Aim & Objective- There has never been a comparison of the treatment results of en-masse retraction of maxillary anterior teeth assisted by mini-implants versus the two-step sliding retraction procedure using traditional anchorage devices.
Methodology- A 133 patients with maxillary dentoalveolar protrusion were examined, out of those only 80 fulfil inclusion criteria with class II division 1 malocclusion were treated. Computer-generated tables were used for randomization, and allocation was concealed using sequentially numbered opaque and sealed envelopes.A total of 56 people (mean age- 22.34±4.56 years) examined. They were divided into two classes at random, each with 28 patients (1:1 allocation ratio). Closure ofspace was achieved using either the en-masse technique with mini-implants or the two-step technique with transpalatal arches after first premolar extraction (TPAs).On lateral cephalograms, the antero-posterior shift of upper incisal edges and upper first molars were assessed at three separate assessment times. The blinding of the assessors was used.
Results-The mini-implants group achieved bodily movement (-4.42 mm; P

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