Measurement of initial displacement of canine and molar in human maxilla under different canine retraction methods using digital holographic interferometry

Manoj Kumar, Anshu Singh Birhman, Sridhar Kannan, Chandra Shakher

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

An application of digital holographic interferometry for the measurement of the initial displacement of canine and molar in the human maxilla, under different canine retraction mechanisms, is presented. The objective of this study is to determine and compare the canine and molar displacements with and without transpalatal arch (TPA) on 0.018-in. stainless steel (SS) and 0.019- × 0.025-in: SS arch-wires, using three different canine retraction sliding mechanism methods: nickel-titanium (Ni-Ti)-closed coil-spring, active tie-back, and elastomeric chains. The proposed technique is highly sensitive and enables the displacement measurement of the canine and molar in human maxilla under different canine retraction methods, more precisely and accurately compared with its counterparts. The experiment was conducted on a dry human skull without mandible with intact dental arches and aligned teeth. The experimental results reveal that Ni-Ti-closed coil-spring produces maximum initial canine displacement, followed by active-tie back and elastomeric chain. It was also found that initial canine and molar displacements were more on 0.018-in. SS arch-wire as compared with 0.019 × 0.025-in: SS arch-wire. Further, the initial displacement of the molar was less when TPA was taken as an anchorage in comparison to without anchorage.

Original languageEnglish
Article number094106
JournalOptical Engineering
Volume57
Issue number9
DOIs
StatePublished - 1 Sep 2018
Externally publishedYes

Keywords

  • Canine retraction mechanism.
  • Digital holographic interferometry
  • Displacement measurement
  • Human maxilla

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Engineering

Fingerprint

Dive into the research topics of 'Measurement of initial displacement of canine and molar in human maxilla under different canine retraction methods using digital holographic interferometry'. Together they form a unique fingerprint.

Cite this