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Restorative

207 - Surface Altering of Band-and-Loop Space Maintainers for Retention to SSCs

Friday, May 22, 2026
4:40 PM - 4:55 PM PST
Has Audio

    Presenting Author(s)

  • Blake G. Gerard, DDS

    Dental Resident
    University of Tennessee Health Science Center (UTHSC)
    University of Tennessee Health Science Center College of Dentistry
    Memphis, Tennessee, United States

    • Co-Author(s)

  • AV

    Autheunis Versluis, PhD

    UTHSC College of Dentistry

  • DV

    Daranee Versluis-Tantbirojn, DDS, MS, PhD

    Professor, Department of General Dentistry
    University of Tennessee Health Science Center
    University of Tennessee Health Science Center

  • Martha H. Wells, DMD, MS

    Chief of Dentistry
    St. Jude Childrend's Research Hospital
    St. Jude Children's Research Hospital
    Memphis, Tennessee, United States

  • Ji Min Yochim, DMD, MS, PhD

    Assistant Professor, Research Director
    UTHSC College of Dentistry, Pediatric Dentistry and Community Oral Health
    UTHSC College of Dentistry, Pediatric Dentistry and Community Oral Health
    Memphis, Tennessee, United States

    • Research Mentor(s)

  • Ji Min Yochim, DMD, MS, PhD

    Assistant Professor, Research Director
    UTHSC College of Dentistry, Pediatric Dentistry and Community Oral Health
    UTHSC College of Dentistry, Pediatric Dentistry and Community Oral Health
    Memphis, Tennessee, United States

    • Program Director(s)

  • Volk V. Vinall, DMD

    Program Director
    The University of Tennessee Health Science Center
    Memphis, Tennessee, United States

Abstract:

Purpose: To determine if retention of a unilateral band-and-loop space maintainer on a stainless steel crown (SSC) can be improved by modification of the intaglio surface of the band.

Methods: Size 37½ Denovo and NuSmile band-and-loop space maintainers were cemented with Ketac Cem Glass Ionomer Luting Cement on size 5 stainless steel crowns for lower right second primary molars. Band intaglio surfaces were modified by chemical roughening, sandblasting, or perforation with a 330 bur (six holes on the buccal and lingual surfaces). Unmodified bands served as controls. Sample size was 10 per group. Specimens underwent thermocycling (5,000 between 5 and 55°C) to simulate 6 months of oral conditions. Retention was tested using a universal testing machine applying a simulated occlusal load by pressing on the joint at 1.0 mm/min. Failure loads when the bands dislodged were recorded and statistically analyzed using two-way ANOVA followed by pairwise comparisons (α=0.05).

Results: The effect of surface treatment was significant (P < .001), but no significant effect of band type was found (P=.392). Mean dislodgement forces did not differ significantly between unaltered NuSmile and Denovo bands (138±24N and 159±27N, respectively). Sandblasting increased retention (167 ± 58N and 177±15N, respectively), although not statistically significantly. Bur alteration and chemical roughening tended to reduce retention; in case of the Denovo band significantly (103±43N after bur alteration, and 62±28N after chemical roughening).

Conclusion: Sandblasting tended to improve stainless steel band retention for both brands tested, whereas bur alteration and chemical roughening tended to lower dislodgement forces.

Identify Supporting Agency and Grant Number: Not applicable