Long-term effectiveness of canine-to-canine bonded flexible spiral wire lingual retainers

Anne-Marie Renkema*, Alianne Renkema, Ewald Bronkhorst, Christos Katsaros

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    65 Citations (Scopus)

    Abstract

    Introduction: The flexible spiral wire (FSW) canine-to-canine lingual retainer bonded to all 6 anterior teeth is a frequently used type of mandibular fixed retainer. This study aimed to assess the long-term effectiveness of FSW canine-to-canine lingual retainers in maintaining the alignment of the mandibular anterior teeth after orthodontic treatment. Methods: The sample consisted of dental casts of 221 consecutively treated patients (75 girls, 146 boys) from the archives of the Department of Orthodontics and Craniofacial Biology, Radboud University Nijmegen Medical Center, The Netherlands, who received a FSW canine-to-canine lingual retainer bonded to all 6 anterior teeth after active orthodontic treatment. The casts were studied before treatment (Ts), immediately after treatment (T0), 2 years (T2), and 5 years (T5) posttreatment. Results: The main irregularity index decreased significantly from 5.40 mm (SD, 3.47) at Ts to 0.07 mm (SD, 0.23) at T0. At T5, the alignment of the mandibular anterior teeth was stable in 200 patients (90.5%); in 21 patients (9.5%), a mean increase of 0.81 mm (SD, 0.47) was observed. The increase of irregularity was strongly related to the bonding failures of the retainer. In 6 patients (2.7%), unexpected posttreatment complications (torque differences of the incisors, increased buccal canine inclination) were observed. Conclusions: The FSW canine-to-canine lingual retainer is very effective in maintaining the alignment of the mandibular anterior region after active orthodontic treatment. However, regular checkups are necessary to determine bonding failures, posttreatment changes, and complications as early as possible. (Am J Orthod Dentofacial Orthop 2011;139:614-21)

    Original languageEnglish
    Pages (from-to)614-621
    Number of pages8
    JournalAmerican Journal of Orthodontics and Dentofacial Orthopedics
    Volume139
    Issue number5
    DOIs
    Publication statusPublished - May-2011

    Keywords

    • MANDIBULAR ANTERIOR ALIGNMENT
    • POSTRETENTION EVALUATION
    • ORTHODONTIC TREATMENT
    • STABILITY
    • RELAPSE
    • RETENTION
    • EXTRACTION

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