Abstract:
Purpose: The present study evaluated the penetration behavior of three low viscosity elastomeric impression materials of different material classes to penetrate the gingival sulcus during the dental impression under visulal representation.
With a specially designed, producted and discussed simulation model of physiological oral conditions the penetration deeps of each impression material could be illustrated and analysed. Material and methods: A anatomical implant model of brass, titan and gelatine gel was made to test the penetration qualities of two addition-curring silicons and one polyether material by human sulci and clinical gingival conditions.
Moreover, the experimentally series were led with and without moisture and weight.
Visual data recording results with a macro camera.
Subsequently, the evaluation fo the recorded film data was analysed with a detail picture survey programm, named Image Pro Plus. Results: The tested polyether impression material behaved under absolutly try conditions with and without weight most reliable and reached maximal sulcuspenetraion deeps.
Under moist conditions, penetraions deeps of the two addition-curring silicons lay over them of polyether impession materials.
Weight application toied only for the addition-curring silcons a role.
Under clinical conditions polyether sulcus penetraion behavior were reduced.
A 100 % filling rate was only reached from the additon-curring silicons during moisture trails with sulcus deeps of 2,75 mm and breaths of 0,5 mm. Conclusion: The tested addition-curring silicons behave against the applied polyether impression material more promising relative to the effective penetration deep under moist trail conditions with weight.
The development and proof of the implant sulcus model designed by university of Tübingen, offers altogether a great promis of in vitro studies for simulations of oral milieu.
Especially the variability of the model konstruction delivered a high potential for futher studies relative to evaluation of clinical questions.