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. 2014 Apr 1;6(2):e145-9.
doi: 10.4317/jced.51379. eCollection 2014 Apr.

Clinical evaluation of bond failures and survival between mandibular canine-to-canine retainers made of flexible spiral wire and fiber-reinforced composite

Maria F Sfondrini  1 , Danilo Fraticelli  2 , Linda Castellazzi  3 , Andrea Scribante  4 , Paola Gandini  5
Affiliations

Clinical evaluation of bond failures and survival between mandibular canine-to-canine retainers made of flexible spiral wire and fiber-reinforced composite

Maria F Sfondrini et al. J Clin Exp Dent. .

Abstract

Objectives: The purpose of this longitudinal prospective randomized study was to evaluate the clinical reliability of two different types of postorthodontic treatment retainers: a silanised-treated glass fibers-reinforced resin composite (FRC) and a directly bonded multistranded stainless steel wire. The hypothesis of the study was to assess if significant differences are present between failure rates of the two retainers.

Study design: This prospective study was based on an assessment of 87 patients (35 men and 52 women),with an average age of 24 years who required a lower arch fixed retainer after orthodontic treatment. Patients were divided in two groups. Assignment was carried out with random tables. A follow-up examination was carried out once a month. The number, cause, and date of single bond adhesive failures were recorded for both retainers over 12 months. Teeth that were rebonded after failure were not included in the success analysis. Statistical analysis was performed by means of a Fisher's exact test, Kaplan-Meier survival estimates, and log rank test.

Results: Bond failure rate was significantly higher (P=0.0392) for multistranded metallic wire than for FRC.

Conclusions: Glass fiber-reinforced resin composite retainers and multistranded metallic wires showed no significant difference in single bond failure rates over a one-year follow up. Key words:Fiber reinforced composite, fixed retention, multistranded wire, orthodontics, retainer, splint.

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Conflict of interest statement

Conflict of interest statement: The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Kaplan Meier survival plots for stainless steel wire and FRC retainers.
See this image and copyright information in PMC

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