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Predictors of postretention stability of mandibular dental arch dimensions in patients treated with a lip bumper during mixed dentition followed by fixed appliances.

Abstract

OBJECTIVE

To identify which dental and/or cephalometric variables were predictors of postretention mandibular dental arch stability in patients who underwent treatment with transpalatal arch and lip bumper during mixed dentition followed by full fixed appliances in the permanent dentition.

MATERIALS AND METHODS

Thirty-one patients were divided into stable and relapse groups based on the postretention presence or absence of relapse. Intercuspid, interpremolar, and intermolar widths; arch length and perimeter; crowding; and lower incisor proclination were evaluated before treatment (T0), after lip bumper treatment (T1), after fixed appliance treatment (T2), and a minimum of 3 years after removal of the full fixed appliance (T3). Logistic regression analyses were performed to evaluate the effect of changes between T0 and T1, as predictive variables, on the occurrence of relapse at T3.

RESULTS

The model explained 53.5 % of the variance in treatment stability and correctly classified 80.6 % of the sample. Of the seven prediction variables, intermolar and interpremolar changes between T0 and T1 (P = .024 and P = .034, respectively) were statistically significant. For every millimeter of increase in intermolar and interpremolar widths there was a 1.52 and 2.70 times increase, respectively, in the odds of having stability. There was also weak evidence for the effect of sex (P = .047).

CONCLUSIONS

The best predictors of an average 4-year postretention mandibular dental arch stability after treatment with a lip bumper followed by full fixed appliances were intermolar and interpremolar width increases during lip bumper therapy. The amount of relapse in this crowding could be considered clinically irrelevant.

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    Source

    The Angle orthodontist 87:2 2017 Mar pg 209-214

    MeSH

    Cephalometry
    Child
    Dental Arch
    Dentition, Mixed
    Female
    Humans
    Male
    Malocclusion, Angle Class I
    Malocclusion, Angle Class II
    Mandible
    Orthodontic Anchorage Procedures
    Orthodontic Appliance Design
    Orthodontic Appliances, Functional
    Recurrence
    Tooth Movement Techniques
    Treatment Outcome

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    27654628

    Citation

    Raucci, Gaetana, et al. "Predictors of Postretention Stability of Mandibular Dental Arch Dimensions in Patients Treated With a Lip Bumper During Mixed Dentition Followed By Fixed Appliances." The Angle Orthodontist, vol. 87, no. 2, 2017, pp. 209-214.
    Raucci G, Pachêco-Pereira C, Elyasi M, et al. Predictors of postretention stability of mandibular dental arch dimensions in patients treated with a lip bumper during mixed dentition followed by fixed appliances. Angle Orthod. 2017;87(2):209-214.
    Raucci, G., Pachêco-Pereira, C., Elyasi, M., d'Apuzzo, F., Flores-Mir, C., & Perillo, L. (2017). Predictors of postretention stability of mandibular dental arch dimensions in patients treated with a lip bumper during mixed dentition followed by fixed appliances. The Angle Orthodontist, 87(2), pp. 209-214. doi:10.2319/051216-379.1.
    Raucci G, et al. Predictors of Postretention Stability of Mandibular Dental Arch Dimensions in Patients Treated With a Lip Bumper During Mixed Dentition Followed By Fixed Appliances. Angle Orthod. 2017;87(2):209-214. PubMed PMID: 27654628.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Predictors of postretention stability of mandibular dental arch dimensions in patients treated with a lip bumper during mixed dentition followed by fixed appliances. AU - Raucci,Gaetana, AU - Pachêco-Pereira,Camila, AU - Elyasi,Maryam, AU - d'Apuzzo,Fabrizia, AU - Flores-Mir,Carlos, AU - Perillo,Letizia, Y1 - 2016/09/21/ PY - 2016/11/2/pubmed PY - 2018/3/20/medline PY - 2016/9/23/entrez KW - Cephalometry KW - Dental arch KW - Lip bumper KW - Malocclusion KW - Relapse and mixed dentition SP - 209 EP - 214 JF - The Angle orthodontist JO - Angle Orthod VL - 87 IS - 2 N2 - OBJECTIVE: To identify which dental and/or cephalometric variables were predictors of postretention mandibular dental arch stability in patients who underwent treatment with transpalatal arch and lip bumper during mixed dentition followed by full fixed appliances in the permanent dentition. MATERIALS AND METHODS: Thirty-one patients were divided into stable and relapse groups based on the postretention presence or absence of relapse. Intercuspid, interpremolar, and intermolar widths; arch length and perimeter; crowding; and lower incisor proclination were evaluated before treatment (T0), after lip bumper treatment (T1), after fixed appliance treatment (T2), and a minimum of 3 years after removal of the full fixed appliance (T3). Logistic regression analyses were performed to evaluate the effect of changes between T0 and T1, as predictive variables, on the occurrence of relapse at T3. RESULTS: The model explained 53.5 % of the variance in treatment stability and correctly classified 80.6 % of the sample. Of the seven prediction variables, intermolar and interpremolar changes between T0 and T1 (P = .024 and P = .034, respectively) were statistically significant. For every millimeter of increase in intermolar and interpremolar widths there was a 1.52 and 2.70 times increase, respectively, in the odds of having stability. There was also weak evidence for the effect of sex (P = .047). CONCLUSIONS: The best predictors of an average 4-year postretention mandibular dental arch stability after treatment with a lip bumper followed by full fixed appliances were intermolar and interpremolar width increases during lip bumper therapy. The amount of relapse in this crowding could be considered clinically irrelevant. SN - 1945-7103 UR - https://www.unboundmedicine.com/medline/citation/27654628/Predictors_of_postretention_stability_of_mandibular_dental_arch_dimensions_in_patients_treated_with_a_lip_bumper_during_mixed_dentition_followed_by_fixed_appliances_ L2 - http://www.angle.org/doi/10.2319/051216-379.1?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -