Sažetak sa skupa

Gradual Loss of Partial Denture Retentive Forces

B. Novaković
Maja Pavić
Vlado Carek

Sažetak

A partial denture can be oppropriately accommodated physiologically on the denture base only with good understanding of the stomatognathic system biostatics. A force can either act as a physiological stimulus or can lead to pathological alterations in supporting tissue, wich depends on a great number of factors.
The aim of the study was to determine the initial retentive force values of cast clasps, anchors and magnets as wel as their gradual loss of force after a certain number of retentive elements, extraction and insertion cycles.
Measurement were carried out at the Materials Department, School Engineering and Naval Architecture, University of Zagreb. The examined specimens were made of materials and ready-made elements in accordance with the manufacturer’s declaration. They satisfy the DIN 13912 and DIN 13906-1 criteria and comply with other
international standards. The device for retentive force measurement can periodically both include and exclude retentive elements thus continually collecting measurement data.
Gradual loss of the examined retentive element forces was analysed by these measurings. The obtained values of the examined retentive elements qualitative analysis are presented in graphs and tables.
In the course of analysis it was dicovered that the retentive force value of both clasps and anchors gradually decreases whereas the magnetic force of the alloys remains unchanged.
The key factors which have a great impact on the retnetive force value are wear and material fatigue. A clasp in a wet environment (saliva) has less retentive force, but due to decreased wear the retnetive force decrease will progress more slowly.

Ključne riječi

Hrčak ID:

3463

URI

https://hrcak.srce.hr/3463

Datum izdavanja:

15.9.2003.

Podaci na drugim jezicima: hrvatski

Posjeta: 1.829 *