Clinical Evaluation of Bond Failures and Survival of Mandibular Canine-to-canine Bonded Retainers during a 12-year Time Span.

Marcello Maddalone ,Pier Matteo Venino ,Luca Mirabelli ,Elisa Rota ,G Porcaro

doi:10.5005/jp-journals-10005-1460

Marcello Maddalone , Pier Matteo Venino + Show 3 more

Open Access

https://doi.org/10.5005/jp-journals-10005-1460

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Abstract

AimThe aim of this study was to assess the effectiveness of the 3-3 mandibular lingual stainless steel retainer to prevent a relapse of orthodontic treatment during the 12-year time span of the survey.Materials and methodsFifty patients with canine-to-canine bonded retainers (placed at least 10 years earlier) were recalled. All patients had been followed up annually during this period. Patients were screened for stability of the retainer and for the condition of hard and soft oral tissues.ResultsNone of the patients reported a complete loss of the retainer; 14 patients reported single element partial losses and 13 reported multiple losses. Most partial failures were not perceived by patients, but noted by the orthodontist during the control visit. There was no notable variation of the gingival index occurring in these patients. In two cases patients had caries in the six teeth bonded with the retainer, but never on the lingual side; only in three teeth areas of decalcification in the proximity of bonded sites were reported. All patients showed good compliance with this kind of retention.ConclusionThe composite adhesive technique allowed a reliable positioning system for directly bonded retainers and did not influence the occurrence of carious lesions or demin-eralized spots on fixed teeth. Full teeth fixation offered the possibility of stabilizing the irregularity index highlighted in various studies without increasing any side effects on gums and hard tissues.How to cite this article: Maddalone M, Rota E, Mirabelli L, Venino PM, Porcaro G. Clinical Evaluation of Bond Failures and Survival of Mandibular Canine-to-canine Bonded Retainers during a 12-year Time Span. Int J Clin Pediatr Dent 2017;10(4):330-334.

Highlights

Throughout the past century and recent years, orthodontists have developed different methods to ensure the stability of teeth position achieved during treatments
Of the 46 patients who had the retainer in place at the check-up, 32 reported no loss during the 12-year time span, 14 (28%) had partial losses, whether or not International Journal of Clinical Pediatric Dentistry, October-December 2017;10(4):[330-334]
Graph 1: (1) Patients who wanted to remove the splint—8%; (2) no loss—64%; (3) 1 loss—2%; (4) 2 losses—8%; (5) 3 losses—4%; (6) 4 losses or more—14%—during the 12-year time span associated to dental displacement

Summary

Introduction

Throughout the past century and recent years, orthodontists have developed different methods to ensure the stability of teeth position achieved during treatments. Removable and fixed appliances were used to stabilize the alignment of mandibular incisors after active treatment in this particular area. Tweed demonstrated that a better stability could be gained with premolar extractions, retreating patients with relapse after fixed appliance treatment. Other authors, including Edwards[3] and Rinchuse et al,[6] found that the effect of circumferential supracrestal fiberotomy was not complete in reducing tooth movement after therapy ended, especially with labiolingual relapses. These types of movement were not as stable in the maxilla as in the mandible and they were not stable over time

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