| Dokumentenart: | Artikel | ||||
|---|---|---|---|---|---|
| Titel eines Journals oder einer Zeitschrift: | Clinical Oral Investigations | ||||
| Verlag: | SPRINGER HEIDELBERG | ||||
| Ort der Veröffentlichung: | HEIDELBERG | ||||
| Band: | 20 | ||||
| Nummer des Zeitschriftenheftes oder des Kapitels: | 2 | ||||
| Seitenbereich: | S. 275-281 | ||||
| Datum: | 2016 | ||||
| Institutionen: | Medizin > Lehrstuhl für Kieferorthopädie Medizin > Lehrstuhl für Zahnärztliche Prothetik | ||||
| Identifikationsnummer: |
| ||||
| Stichwörter / Keywords: | WEAR-RESISTANCE; ACRYLIC RESIN; LABORATORY SIMULATION; FRACTURE STRENGTH; ZIRCONIA CROWNS; TEETH; FAILURE; ANTAGONISTS; SURVIVAL; HARDNESS; Dentureteeth; Implant/gingivabearing; Anterior/posterior teeth; Chewing simulation; Fracture resistance | ||||
| Dewey-Dezimal-Klassifikation: | 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin | ||||
| Status: | Veröffentlicht | ||||
| Begutachtet: | Ja, diese Version wurde begutachtet | ||||
| An der Universität Regensburg entstanden: | Ja | ||||
| Dokumenten-ID: | 41859 |
Web of ScienceZusammenfassung
Objectives Removable dentures with different denture teeth may provide different performance and resistance in implant and gingival situations, or anterior and posterior applications. Materials and methods Two situations of removable dentures were investigated: gingiva (flexible) and implant (rigid) bearing. For simulating the gingiva/jaw situation, the dentures were supported with flexible ...
Zusammenfassung
Objectives Removable dentures with different denture teeth may provide different performance and resistance in implant and gingival situations, or anterior and posterior applications. Materials and methods Two situations of removable dentures were investigated: gingiva (flexible) and implant (rigid) bearing. For simulating the gingiva/jaw situation, the dentures were supported with flexible lining material. For the implant situation, implants (d=4.1 mm) were screwed into polymethylenmethacrylate (PMMA) resin. Two commercial (Vita-Physiodens MRP, SR Vivodent/Orthotyp DCL) and two experimental materials (EXP1, EXP2) were investigated in anterior (A) and posterior (P) tooth locations. Chewing simulation was performed, and failures were analyzed (microscopy, SEM). Fracture strength of surviving dentures was determined. Results Only EXP1 revealed failures during chewing simulation. Failures varied between anterior and posterior locations, and between implant (P:4x; A:7x) or gingiva (P:1x; A:2x) situations. Kaplan-Meier log-rank test revealed significant differences for implant situations (p<0.002), but not for gingiva bearing (p>0.093). Fracture testing in the implant situation provided significantly highest values for EXP2 (1476.4 +/- 532.2 N) in posterior location, and for DCL (1575.4 +/- 264.4 N) and EXP2 (1797.0 +/- 604.2 N) in anterior location. For gingival bearing, significantly highest values were found for DCL/P (2148.3 +/- 836.3 N), and significantly lowest results for EXP1/A (308.2 +/- 115.6 N). For EXP1+ EXP2+ Vita/P and for EXP1/A no significant differences were found between implant-or gingiva-supported situations. Conclusions Anterior and posterior teeth showed different material-dependent in vitro performance, further influenced by implant/gingiva bearing. While an implant in anterior application increased fracture strength of two materials, it decreased fracture values of 3/4 of the materials in posterior application. Clinical relevance Survival of denture teeth may be influenced by material, oral position, and bearing situation.
Metadaten zuletzt geändert: 17 Mrz 2020 11:01
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