Effects of high-intensity curing lights on microleakage under orthodontic bands.

Uysal, T ; Ramoglu, SI ; et al.

In: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, Jg. 138 (2010-08-01), Heft 2, S. 201-7

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Introduction: Our objective was to compare the effects of 3 light-curing units (LCUs) (quartz-tungsten-halogen [QTH], light-emitting diode [LED], and plasma-arc curing [PAC]) on the microleakage patterns of a polyacid-modified composite (PAMC) for band cementation between the cement-enamel and the cement-band interfaces from the buccal, lingual, occlusal, and gingival margins.

Methods: Sixty freshly extracted third molars were randomly divided into 3 groups of 20 teeth each. Microetched molar bands were cemented in all groups with the PAMC (Ultra Band-Lok, Reliance Orthodontic Products, Itasca, Ill) and cured for 30 seconds with the QTH (Hilux 350, Express Dental Products, Toronto, Ontario, Canada), for 20 seconds with the LED (Elipar Freelight 2, 3M Espe, Seefeld, Germany), or for 6 seconds with the PAC (Power-Pac, American Medical Technologies, Hannover, Germany). A dye penetration method was used for microleakage evaluation. Microleakage was determined with a stereomicroscope for the cement-band and cement-enamel interfaces from the buccal and lingual sides at the occlusal and gingival margins. Statistical analyses were performed with the Kruskal-Wallis and Mann-Whitney U tests. The level of significance was set at P <0.05.

Results: The gingival sides in the LED and PAC groups had higher microleakage scores compared with those observed on the occlusal sides at both the cement-band and cement-enamel interfaces. The buccal sides had similar microleakage values compared with those on the lingual sides for the cement-enamel and cement-band interfaces in all LCU types. Statistical comparisons showed that there were statistically significant differences among the investigated LCUs at the cement-enamel interface (P <0.05). Post hoc comparisons showed statistically significant microleakage differences between the PAC (median, 0.950 mm), the QTH (median, 0.383 mm) (P <0.01), and the PAC and the LED (median, 0.558 mm) (P <0.05) LCUs at the cement-enamel interfaces.

Conclusions: The high-intensity curing device PAC is associated with more microleakage than the LED and QTH at the cement-enamel interface.

Titel:	Effects of high-intensity curing lights on microleakage under orthodontic bands.
Autor/in / Beteiligte Person:	Uysal, T ; Ramoglu, SI ; Ulker, M ; Ertas, H
Zeitschrift:	American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, Jg. 138 (2010-08-01), Heft 2, S. 201-7
Veröffentlichung:	St. Louis : Elsevier ; <i>Original Publication</i>: [St. Louis, Mo.] : C.V. Mosby, [c1986-, 2010
Medientyp:	academicJournal
ISSN:	1097-6752 (electronic)
DOI:	10.1016/j.ajodo.2008.09.032
Schlagwort:	Compomers radiation effects Dental Enamel drug effects Dental Enamel radiation effects Humans Orthodontic Brackets Resin Cements radiation effects Compomers chemistry Curing Lights, Dental Dental Leakage prevention & control Light-Curing of Dental Adhesives instrumentation Resin Cements chemistry
Sonstiges:	Nachgewiesen in: MEDLINE Sprachen: English Publication Type: Comparative Study; Journal Article Language: English [Am J Orthod Dentofacial Orthop] 2010 Aug; Vol. 138 (2), pp. 201-7. MeSH Terms: Curing Lights, Dental* ; Compomers / chemistry ; Dental Leakage / prevention & control ; Light-Curing of Dental Adhesives / instrumentation ; Resin Cements / chemistry ; Compomers / radiation effects ; Dental Enamel / drug effects ; Dental Enamel / radiation effects ; Humans ; Orthodontic Brackets ; Resin Cements / radiation effects Substance Nomenclature: 0 (Compomers) ; 0 (Resin Cements) Entry Date(s): Date Created: 20100810 Date Completed: 20100913 Latest Revision: 20101118 Update Code: 20231215

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