Universität zu Köln

Seide, Marlen, Kruse, Teresa, Graf, Isabelle, Bourauel, Christoph, Lapatki, Bernd G., Jaeger, Rudolf and Braumann, Bert . Inadvertent side effects of fixed lingual retainers An in vitro study. J. Orofac. Orthop.. MUNICH: URBAN & VOGEL. ISSN 1615-6714

Full text not available from this repository.

Abstract

Purpose To better understand the side effects of fixed lingual retainers by means of an in vitro study in a two-tooth model determining the three-dimensional (3D) force-moment components acting at adjacent teeth combined with different composite-wire interfaces. Methods Triple-stranded round retainer wires were embedded in cured disks of flowable composite. At one side the composite-wire interface was untreated and checked to be absolutely fix. At the other side the composite-wire interface was configured as either an isolated compound with (1) petroleum jelly coating, or an adhered compound with (2) no manipulation, (3) ethanol degreasing or (4) ethanol degreasing and rectangular bending of the wire ends. The 3D force-moment components were registered, while the intertooth distance was increased in steps of 0.01 mm leading to increasing tension of the wire. Measurements were repeated after artificially aging the specimens. Results Retainer wire specimens with adhered compound (2, 3, 4) showed negative vestibulo-oral moments ranging maximally each between -0.3 and -0.9 Nmm in opposite direction to positive moments of 1.9 Nmm for specimens with isolated compound 1. Significant tipping moments occurred in the group with isolated compound at lower forces than in those groups with adhered compound. Similar effects were observed after artificial aging. Conclusion Side effects emerge under specific circumstances: an altered adhesive compound combined with the presence of oral forces. Compounds with lost adhesion at the composite-wire interface showed rotational moments in the direction of the wire windings even during low tensile forces similar to those that may occur in clinical settings. Opposite rotational moments leading to unwinding of the wire may occur in cases with adhered compounds at higher tensile forces. Utilization of round triple-stranded retainer wires without bent ends are of higher risk to induce inadvertent side effects.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Seide, Marlen UNSPECIFIED UNSPECIFIED UNSPECIFIED Kruse, Teresa UNSPECIFIED UNSPECIFIED UNSPECIFIED Graf, Isabelle UNSPECIFIED UNSPECIFIED UNSPECIFIED Bourauel, Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED Lapatki, Bernd G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jaeger, Rudolf UNSPECIFIED UNSPECIFIED UNSPECIFIED Braumann, Bert UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-672854
DOI:	10.1007/s00056-022-00432-4
Journal or Publication Title:	J. Orofac. Orthop.
Publisher:	URBAN & VOGEL
Place of Publication:	MUNICH
ISSN:	1615-6714
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language UNEXPECTED COMPLICATIONS; BITE FORCE; FOLLOW-UP; WIRES; MORPHOLOGY; RELAPSE Multiple languages Dentistry, Oral Surgery & Medicine Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/67285