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Long-term stability of combined rapid palatal expansion-lip bumper therapy followed by full fixed appliances.

Abstract

INTRODUCTION

The purpose of this study was to evaluate the long-term postretention stability of rapid palatal expansion-lip bumper therapy followed by full fixed appliances.

METHODS

The sample included 20 treated patients (11 women and 9 men) who were recalled to obtain postretention records. The subjects were out of retention for a minimum of 4 years and an average of 7.9 years. They had begun treatment in the late mixed dentition at a mean age of 11.1 with considerable incisor crowding but, on average, no tooth size-arch length discrepancies. Pretreatment, posttreatment (mean age, 13.6 years), and postretention (mean age, 24.3 years) models were digitized, and the computed measurements were compared with untreated reference data.

RESULTS

The majority of treatment increases in maxillary and mandibular arch dimensions were statistically significant (P < .05) and greater than expected for untreated controls. Although many measurements decreased postretention, net gains were maintained for 21 of the 30 measurements evaluated. The notable exception was arch perimeter, which decreased to less than pretreatment values. Postretention incisor irregularity increased 0.5 +/- 1.2 mm in the maxillary arch and 1.1 +/- 1.5 mm in the mandibular arch.

CONCLUSIONS

Based on the good long-term stability observed in this study, we concluded that use of rapid palatal expansion-lip bumper expansion therapy in the late mixed dentition followed by full fixed appliances is an effective form of treatment for patients with up to moderate tooth size-arch length discrepancies.

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    MeSH

    Child
    Dental Arch
    Extraoral Traction Appliances
    Female
    Humans
    Incisor
    Lip
    Male
    Malocclusion
    Mandible
    Odontometry
    Orthodontic Appliances
    Orthodontic Retainers
    Palatal Expansion Technique
    Recurrence
    Reproducibility of Results
    Retrospective Studies
    Treatment Outcome

    Pub Type(s)

    Evaluation Studies
    Journal Article

    Language

    eng

    PubMed ID

    16168328

    Citation

    Ferris, Tyler, et al. "Long-term Stability of Combined Rapid Palatal Expansion-lip Bumper Therapy Followed By Full Fixed Appliances." American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, vol. 128, no. 3, 2005, pp. 310-25.
    Ferris T, Alexander RG, Boley J, et al. Long-term stability of combined rapid palatal expansion-lip bumper therapy followed by full fixed appliances. Am J Orthod Dentofacial Orthop. 2005;128(3):310-25.
    Ferris, T., Alexander, R. G., Boley, J., & Buschang, P. H. (2005). Long-term stability of combined rapid palatal expansion-lip bumper therapy followed by full fixed appliances. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 128(3), pp. 310-25.
    Ferris T, et al. Long-term Stability of Combined Rapid Palatal Expansion-lip Bumper Therapy Followed By Full Fixed Appliances. Am J Orthod Dentofacial Orthop. 2005;128(3):310-25. PubMed PMID: 16168328.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Long-term stability of combined rapid palatal expansion-lip bumper therapy followed by full fixed appliances. AU - Ferris,Tyler, AU - Alexander,R G, AU - Boley,Jimmy, AU - Buschang,Peter H, PY - 2003/08/23/received PY - 2003/11/22/revised PY - 2005/01/04/accepted PY - 2005/9/20/pubmed PY - 2005/10/5/medline PY - 2005/9/20/entrez SP - 310 EP - 25 JF - American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics JO - Am J Orthod Dentofacial Orthop VL - 128 IS - 3 N2 - INTRODUCTION: The purpose of this study was to evaluate the long-term postretention stability of rapid palatal expansion-lip bumper therapy followed by full fixed appliances. METHODS: The sample included 20 treated patients (11 women and 9 men) who were recalled to obtain postretention records. The subjects were out of retention for a minimum of 4 years and an average of 7.9 years. They had begun treatment in the late mixed dentition at a mean age of 11.1 with considerable incisor crowding but, on average, no tooth size-arch length discrepancies. Pretreatment, posttreatment (mean age, 13.6 years), and postretention (mean age, 24.3 years) models were digitized, and the computed measurements were compared with untreated reference data. RESULTS: The majority of treatment increases in maxillary and mandibular arch dimensions were statistically significant (P < .05) and greater than expected for untreated controls. Although many measurements decreased postretention, net gains were maintained for 21 of the 30 measurements evaluated. The notable exception was arch perimeter, which decreased to less than pretreatment values. Postretention incisor irregularity increased 0.5 +/- 1.2 mm in the maxillary arch and 1.1 +/- 1.5 mm in the mandibular arch. CONCLUSIONS: Based on the good long-term stability observed in this study, we concluded that use of rapid palatal expansion-lip bumper expansion therapy in the late mixed dentition followed by full fixed appliances is an effective form of treatment for patients with up to moderate tooth size-arch length discrepancies. SN - 0889-5406 UR - https://www.unboundmedicine.com/medline/citation/16168328/Long_term_stability_of_combined_rapid_palatal_expansion_lip_bumper_therapy_followed_by_full_fixed_appliances_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(05)00006-5 DB - PRIME DP - Unbound Medicine ER -