Long-term retention behaviour of resin matrix attachment systems for overdentures

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Nicole Passia - , Department of Prosthodontics, Propaedeutics and Dental Materials, Kiel University (Author)
  • Muhamad Ghazal - , Kiel University (Author)
  • Matthias Kern - , Propaedeutics and Dental Materials, Kiel University (Author)

Abstract

OBJECTIVES: The purpose of this laboratory study was to evaluate the long-term retention behaviour of two resin matrix attachment systems for overdentures and the influence of the implant angulation.

METHODS: Sixteen titanium patrices of each attachment system were connected to their corresponding implant analogues and fixed in an auto curing resin either orthogonally (n=8) or 20° tilted (n=8). The corresponding matrices, one made from polyetherketoneketone (PEKK; CM LOC, Cendres+Métaux, Biel, Switzerland), one made from polyethylene (PE; Locator, Zest Anchors, Escondido, California, USA), were fixed in a stylised unilaterally removable dental prosthesis resulting in 4 groups with 8 specimens in each group. Overall, 30,000 joining and separating cycles of the matrix were performed in a chewing simulator. After each joining movement, the unilaterally removable dental prosthesis was loaded eccentrically with 100N at a distance of 12mm from the attachment to simulate clinical loading conditions. Retentive forces were measured during the test using force transducers. The statistical analysis was performed using Tukey-HSD.

RESULTS: Both attachment systems showed a significant decrease in retention over time, which occurred earlier in the tilted groups than in the orthogonal groups. After 5000-30,000 joining and separating cycles the PE matrix attachment provided significantly lower retention than the PEKK matrix attachment system.

CONCLUSION: Within the limitations of this investigation, the combination of a titanium patrix and a matrix made from polyetherketoneketone seems to be a promising material combination for long-term retention, also on tilted implants.

Details

Original languageEnglish
Pages (from-to)88-94
Number of pages7
JournalJournal of the mechanical behavior of biomedical materials
Volume57
Publication statusPublished - Apr 2016
Peer-reviewedYes

External IDs

Scopus 84949908545
ORCID /0000-0002-3548-9462/work/142247482

Keywords

Keywords

  • Denture, Overlay, Ketones/chemistry, Materials Testing, Resins, Synthetic/chemistry, Time Factors

Library keywords