Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: denture retention

Sortuj według:

Ogranicz wyniki do:

The effect of saturation by artificial saliva on the effectiveness of denture adhesives

Kasperski J., Chladek G., Żmudzki J., Lipski T.

Archives of Materials Science and Engineering

2011

Vol. 51, nr 1

25-32

Purpose: of this examination was to evaluate the impact of saturation of adhesive materials by artificial saliva upon the generated bonding force. Design/methodology/approach: Four selected types of denture adhesives have been chosen. Measurements of bonding forces of the materials of different degree of saturation by artificial saliva have been carried out by dynamometer. The stamp covered by denture adhesive was pressed against the glass with force of 30 - 40 N and then keeping perpendicular movement against the glass, the stamp was pulled off and the joining was broken. It has been assumed that the bonding force was the equivalent of maximal pulling off force obtained in the test. The samples of different degree of saturation by artificial saliva have been exposed to tests of extensibility in a device of own design. The final denture adhesives have been put on the complete denture. It was pressed down against the denture bearing area model and next the values of retention forces were determined on a universal testing machine. Findings: Proper saturation of the samples by artificial saliva makes it possible to obtain approximate values of retention force for the majority of denture adhesives. However excessive saturation of adhesive materials can result in considerable reduction of their effectiveness. Research limitations/implications: The samples are handmade as well as part of the measurements are carried out manually and this is justified by the specific clinical conditions. Practical implications: Analysis of the impact of the level of saturation of denture adhesives by artificial saliva upon the generated bonding force highlights the need for individual selection of adhesive creams. The choice of material should be related to individual features such as secretion of saliva. It is advisable to introduce into clinical practice the option of adjusting the optimum saturation of particular denture adhesives by artificial saliva materials. Originality/value: The presented research work results allow to combine the secretion of saliva with the effectiveness of denture adhesives.

Influence of tongue activity on lower complete denture retention under biting forces

Żmudzki J., Chladek G., Lipski T.

Acta of Bioengineering and Biomechanics

2008

Vol. 10, nr 3

13-20

Tongue activity constitutes a helpful factor in using complete dentures. It has not however been identified, to what extent the force of the tongue can directly stabilize the denture during the occurrence of biting forces. Dislodgement force of the denture held by the patients tongue shows a significant dependence on the tongue strength efficiency, however only few patients are able to analyze the mechanisms of using their tongues to stabilize the denture. The results of the FEM analysis show that the tongue has a strong advantageous influence on denture lateral stability during chewing and also during biting, and a slightly lower ability of counteracting the denture destabilization towards the front. The role played by the tongue in denture retention is not only that it locates the denture by means of tactile sensation but also that it supports the forces counteracting denture dislodgement.