Survival of flexible, braided, bonded stainless steel lingual retainers: a historic cohort study

The objectives of this study were to retrospectively evaluate the clinical survival rate of flexible, braided, rectangular bonded stainless steel lingual retainers, and to investigate the influence of gender, age of the patient, and operator experience on survival after orthodontic treatment at the...

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Veröffentlicht in:European journal of orthodontics 2008-04, Vol.30 (2), p.199-204
Hauptverfasser: Lie Sam Foek, D. J., Özcan, M., Verkerke, G. J., Sandham, A., Dijkstra, P. U.
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container_end_page 204
container_issue 2
container_start_page 199
container_title European journal of orthodontics
container_volume 30
creator Lie Sam Foek, D. J.
Özcan, M.
Verkerke, G. J.
Sandham, A.
Dijkstra, P. U.
description The objectives of this study were to retrospectively evaluate the clinical survival rate of flexible, braided, rectangular bonded stainless steel lingual retainers, and to investigate the influence of gender, age of the patient, and operator experience on survival after orthodontic treatment at the Department of Orthodontics, University of Groningen, between the years 2002 and 2006. The study group comprised of 277 patients [162 females: median age 14.8 years, interquartile range (IQR) 13.6–16.5 years and 115 males: median age 15.3 years, IQR 14.2–16.7 years]. After acid etching the lingual surfaces of each tooth, an adhesive resin was applied and retainers were bonded using a flowable resin composite. Data concerning, failures, gender, age of the patient, and operator experience were retrieved from the patient files that were updated by chart entries every 6 months or when failure was reported by the patient. The maximum follow-up period was 41.7 months. All 277 patients received flexible, braided, bonded mandibular canine-to-canine retainers. Eighteen failures were observed in the maxilla. A failure was recorded when there was debonding, fracture, or both, occurring in one arch. Only first failures were used for statistical analysis. When failures occurred in both jaws, these were considered as two separate incidences. Ninety-nine debonding (35.7 per cent), two fractures (0.7 per cent), and four debonding and fracture (1.4 per cent) events were observed. No significant effect (P > 0.05) of gender (females: 41 per cent, males: 32 per cent) or patient age ( 0.05; chi-square test). Kaplan–Meier survival curves showed a 63 per cent success rate for the bonded lingual retainers over a 41.7 month period.
doi_str_mv 10.1093/ejo/cjm117
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Data concerning, failures, gender, age of the patient, and operator experience were retrieved from the patient files that were updated by chart entries every 6 months or when failure was reported by the patient. The maximum follow-up period was 41.7 months. All 277 patients received flexible, braided, bonded mandibular canine-to-canine retainers. Eighteen failures were observed in the maxilla. A failure was recorded when there was debonding, fracture, or both, occurring in one arch. Only first failures were used for statistical analysis. When failures occurred in both jaws, these were considered as two separate incidences. Ninety-nine debonding (35.7 per cent), two fractures (0.7 per cent), and four debonding and fracture (1.4 per cent) events were observed. No significant effect (P &gt; 0.05) of gender (females: 41 per cent, males: 32 per cent) or patient age (&lt;16 years: 37 per cent, ≥16 years 38.7 per cent) was observed. The failure rate did not differ due to operator experience (n = 15; less experienced: 38.0 per cent; moderately experienced: 28.9 per cent, professional: 46.7 per cent; P &gt; 0.05; chi-square test). 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After acid etching the lingual surfaces of each tooth, an adhesive resin was applied and retainers were bonded using a flowable resin composite. Data concerning, failures, gender, age of the patient, and operator experience were retrieved from the patient files that were updated by chart entries every 6 months or when failure was reported by the patient. The maximum follow-up period was 41.7 months. All 277 patients received flexible, braided, bonded mandibular canine-to-canine retainers. Eighteen failures were observed in the maxilla. A failure was recorded when there was debonding, fracture, or both, occurring in one arch. Only first failures were used for statistical analysis. When failures occurred in both jaws, these were considered as two separate incidences. Ninety-nine debonding (35.7 per cent), two fractures (0.7 per cent), and four debonding and fracture (1.4 per cent) events were observed. No significant effect (P &gt; 0.05) of gender (females: 41 per cent, males: 32 per cent) or patient age (&lt;16 years: 37 per cent, ≥16 years 38.7 per cent) was observed. The failure rate did not differ due to operator experience (n = 15; less experienced: 38.0 per cent; moderately experienced: 28.9 per cent, professional: 46.7 per cent; P &gt; 0.05; chi-square test). 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U.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Survival of flexible, braided, bonded stainless steel lingual retainers: a historic cohort study</atitle><jtitle>European journal of orthodontics</jtitle><addtitle>Eur J Orthod</addtitle><date>2008-04-01</date><risdate>2008</risdate><volume>30</volume><issue>2</issue><spage>199</spage><epage>204</epage><pages>199-204</pages><issn>0141-5387</issn><eissn>1460-2210</eissn><coden>EJOODK</coden><abstract>The objectives of this study were to retrospectively evaluate the clinical survival rate of flexible, braided, rectangular bonded stainless steel lingual retainers, and to investigate the influence of gender, age of the patient, and operator experience on survival after orthodontic treatment at the Department of Orthodontics, University of Groningen, between the years 2002 and 2006. The study group comprised of 277 patients [162 females: median age 14.8 years, interquartile range (IQR) 13.6–16.5 years and 115 males: median age 15.3 years, IQR 14.2–16.7 years]. After acid etching the lingual surfaces of each tooth, an adhesive resin was applied and retainers were bonded using a flowable resin composite. Data concerning, failures, gender, age of the patient, and operator experience were retrieved from the patient files that were updated by chart entries every 6 months or when failure was reported by the patient. The maximum follow-up period was 41.7 months. All 277 patients received flexible, braided, bonded mandibular canine-to-canine retainers. Eighteen failures were observed in the maxilla. A failure was recorded when there was debonding, fracture, or both, occurring in one arch. Only first failures were used for statistical analysis. When failures occurred in both jaws, these were considered as two separate incidences. Ninety-nine debonding (35.7 per cent), two fractures (0.7 per cent), and four debonding and fracture (1.4 per cent) events were observed. No significant effect (P &gt; 0.05) of gender (females: 41 per cent, males: 32 per cent) or patient age (&lt;16 years: 37 per cent, ≥16 years 38.7 per cent) was observed. The failure rate did not differ due to operator experience (n = 15; less experienced: 38.0 per cent; moderately experienced: 28.9 per cent, professional: 46.7 per cent; P &gt; 0.05; chi-square test). Kaplan–Meier survival curves showed a 63 per cent success rate for the bonded lingual retainers over a 41.7 month period.</abstract><cop>England</cop><pub>Oxford University Press</pub><pmid>18222927</pmid><doi>10.1093/ejo/cjm117</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record>
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source Oxford University Press Journals All Titles (1996-Current); MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection
subjects Adolescent
Age Factors
Clinical Competence
Cohort Studies
Composite Resins
Dental Alloys
Dental Bonding
Dental Stress Analysis
Dentistry
Female
Humans
Kaplan-Meier Estimate
Male
Orthodontic Appliance Design
Orthodontic Retainers
Pliability
Resin Cements
Retrospective Studies
Sex Factors
Stainless Steel
title Survival of flexible, braided, bonded stainless steel lingual retainers: a historic cohort study
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