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Year : 2016  |  Volume : 4  |  Issue : 1  |  Page : 13-17

Bond strength of aged lingual retainers

1 Department of Orthodontics, Bezmialem Vakif University, Istanbul, Turkey
2 Department of Orthodontics, Abant Izzet Baysal University, Bolu, Turkey
3 Department of Restorative Dentistry, Selcuk University, Konya, Turkey
4 Department of Orthodontics, Inonu University, Malatya, Turkey

Correspondence Address:
Sertac Aksakalli
Bezmialem Vakif University, Di? Hekimli?i Fakültesi, Ortodonti Anabilim Dali, Fatih, Istanbul
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2321-3825.172219

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Introduction: The purpose of this study was to examine the tensile bond strength (TBS) of two different lingual retainer (LR) composite systems and three LR wires after they were aged by loadcycling and thermocycling. Materials and Methods: A 15 mm length of wire was bonded to the lingual surfaces of pairs of human incisors using two bonding techniques. Seventy-two pairs of incisors were placed into six groups, and loadcycling (50,000 times) and thermocycling (10,000 times) were performed. The failure characteristics examined included the maximum force for debonding and the site of failure. The adhesive remnant index scores were calculated. Data were compared by two-way analysis of variance and Tukey highly significant difference analysis. Results: All groups generally showed statistically significant differences in TBS score (P < 0.05). For each group, the highest average TBS score (P < 0.05) was obtained from a Transbond LR + Remalloy LR combination. The main failure type was a mixed failure. Conclusions: Retainer wire and composite combinations had significant differences. One of the best selection criteria for LRs is the determination of the bond strength needs of a case.

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