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Lower Bonded Retainers: Survival and Failure Rates Particularly Considering Operator Experience

Unterkiefer-Kleberetainer: Überlebensraten und Defektverhalten unter besonderer Berücksichtigung der Behandlererfahrung

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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie Aims and scope Submit manuscript

Abstract

Objective:

The aim of this study was to retrospectively assess the frequency and type of lower bonded retainer failures and to analyze the possible influence of operator experience.

Patients and Methods:

The records of 1062 patients with lower bonded retainers were analyzed with respect to retainer type and failure, timing of failure and differences among operators.

Results:

34.9% of all patients experienced retainer failure. Cuspid retainers with two bonding sites failed significantly less often than multiple teeth retainers with six bonding sites. One or more bonding sites became detached in 22.8% of the patients, 17.9% had at least one total retainer loss, while only 0.8% of the patients suffered from retainer fractures. Experienced orthodontists exhibited significantly fewer failures than postgraduate students.

Conclusions:

The present cohort presented a relatively high failure rate of 34.9%. Lower bonded cuspid retainers failed somewhat less often than 3-3 retainers. In addition less operator experience was likely to correlate with a higher failure rate.

Zusammenfassung

Fragestellung:

Ziel der Studie war es, retrospektiv die Haufigkeit und Art von Unterkiefer-Retainerdefekten zu bestimmen sowie zu analysieren, ob die Erfahrung des Behandlers einen Einfluss auf die Defektrate hat.

Patienten und Methodik:

Die Patientenakten von 1062 Patienten mit Kleberetainern wurden hinsichtlich der Retainerart, der Defektart, des Zeitpunkts der Defekte sowie der Unterschiede zwischen Behandlern untersucht.

Ergebnisse:

34,9% aller Patienten wiesen Retainerdefekte auf, wobei Cuspidretainer mit zwei Klebestellen signifikant weniger von Defekten betroffen waren als Einzelzahnkleberetainer mit sechs Klebestellen. Bei 22,8% der Patienten losten sich eine oder mehrere Klebestellen, 17,9% hatten mindestens einen totalen Retainerverlust zu verzeichnen, wahrend nur 0,8% der Patienten von Retainerbruchen betroffen waren. Erfahrene Kieferorthopaden hatten signifikant weniger Defekte zu verzeichnen als Weiterbildungsassistenten.

Schlussfolgerungen:

Das untersuchte Patientengut wies mit 34,9% eine vergleichsweise hohe Defektrate auf und Cuspidretainer im Unterkiefer zeigten ein etwas besseres Defektverhalten als 3-3-Einzelzahnkleberetainer. Ferner zeigte sich, dass bei geringerer Behandlererfahrung mit einer erhohten Defektrate zu rechnen ist.

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Correspondence to Sabine Ruf.

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Scheibe, K., Ruf, S. Lower Bonded Retainers: Survival and Failure Rates Particularly Considering Operator Experience. J Orofac Orthop 71, 300–307 (2010). https://doi.org/10.1007/s00056-010-1015-7

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  • DOI: https://doi.org/10.1007/s00056-010-1015-7

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