Unbound MEDLINE

Comparison of ball and telescopic crown attachments in implant-retained mandibular overdentures: a 5-year prospective study.

Abstract

PURPOSE
Implant success, peri-implant conditions, and prosthodontic maintenance requirements were evaluated and compared for mandibular overdentures supported by two implants and retained with ball or resilient telescopic crown attachments during a 5-year period.
MATERIALS AND METHODS
Twenty-five patients with an edentulous mandible each received two root-form dental implants in the mandibular interforaminal (canine) region. The type of denture attachment was chosen randomly; 13 patients received ball attachments and 12 patients received resilient telescopic crowns. Implant success and peri-implant conditions (bone resorption, pocket depth, Plaque Index, Gingival Index, Bleeding Index) as well as prosthodontic maintenance and patient satisfaction were evaluated annually during a 5-year follow-up period and compared with respect to the two retention modalities used.
RESULTS
Implant success, peri-implant conditions, and subjective patient satisfaction scores did not differ between the two retention modalities used. However, during the 5-year observation period, significantly more postinsertion complications/interventions for maintenance purposes were registered in the ball group (87 interventions, 61.1%) than in the telescopic crown group (53 interventions, 37.9%; P < .01). Differences in prosthodontic maintenance efforts were most significant in the second and third years (P < .05) of the follow-up period but were similar at the end of the study for both anchorage systems.
CONCLUSION
Both ball attachments and resilient telescopic crowns on isolated implants in the atrophic mandible are viable treatment options for implant-supported overdentures. No implant losses, good peri-implant conditions, and general patient satisfaction were noted. Although the frequency of technical complications was initially higher with ball attachments than with resilient telescopic crowns over a 5-year period, similar frequencies of maintenance efforts may be anticipated for both retention modalities.

Links

  • Aggregator Full Text
  • Authors

    Krennmair G, Seemann R, Weinländer M, Piehslinger E

    Source

    The International journal of oral & maxillofacial implants 26:3 pg 598-606

    MeSH

    Adult
    Aged
    Dental Abutments
    Dental Health Surveys
    Dental Implantation, Endosseous
    Dental Implants
    Dental Prosthesis Design
    Dental Prosthesis Retention
    Dental Prosthesis, Implant-Supported
    Dental Restoration Failure
    Denture Retention
    Denture, Complete, Lower
    Denture, Overlay
    Female
    Humans
    Jaw, Edentulous
    Longitudinal Studies
    Male
    Mandible
    Middle Aged
    Oral Surgical Procedures, Preprosthetic
    Prospective Studies
    Statistics, Nonparametric
    Treatment Outcome
    Weight-Bearing

    Pub Type(s)

    Journal Article
    Randomized Controlled Trial

    Language

    eng

    PubMed ID

    21691608