Analysis of reversed L-loops as closing loops with anterior intrusive force

Paiboon Techalertpaisarn, Antheunis Versluis

Research output: Contribution to journalArticle

Abstract

Objective: Intrusive forces on anterior brackets are preferable for avoiding overbite deepening. Reversing plain L-loops may create such advantageous force system during space closure. Design: Force systems of reversed L-loops were compared with T-loops at three interbracket distances (IBD). Setting: Computational study. Methods: Using finite element analysis, loop response during simulated loop-pulling was determined for plain reversed L- and T-loop configurations at three IBDs and two sizes. Force systems were calculated on both loop ends for two activation forces. Results: The 12 mm IBD reversed L-loops had almost equal M/F ratios in opposite directions at both ends. A small intrusive force was found at the canine bracket (CB). The 6 mm IBD reversed L-loops showed larger M/F ratios and extrusive forces at the premolar bracket (PB) and smaller M/F with intrusive forces at CB. The force system of 12 mm IBD T-loops showed the similar force systems as off-centered V-bends with extrusive force at CB, whilst plain 6 mm IBD T-loops showed properties similar to centered V-bends with less extrusive force at CB. Conclusions: Reversed L closing loops placed no extrusive force on the CB end at various IBDs, indicating that reversed loops will generate an intrusive force at anterior teeth during space closure.

Original languageEnglish (US)
Pages (from-to)192-197
Number of pages6
JournalJournal of Orthodontics
Volume45
Issue number3
DOIs
StatePublished - Jul 3 2018

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Canidae
Overbite
Finite Element Analysis
Bicuspid
Tooth

All Science Journal Classification (ASJC) codes

  • Orthodontics

Cite this

Analysis of reversed L-loops as closing loops with anterior intrusive force. / Techalertpaisarn, Paiboon; Versluis, Antheunis.

In: Journal of Orthodontics, Vol. 45, No. 3, 03.07.2018, p. 192-197.

Research output: Contribution to journalArticle

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