| 1710 Occlusal accuracy of RPDs relined with Versyo.com HD® | ||
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A. ZOELLNER, University of Witten/Herdecke, Germany, and S. ZOELLNER, University of Witten/Herdecke, Germany Objectives: Relining of removable partial dentures (RPDs) is frequently required in clinical routine. It was the aim to investigate changes in occlusion as a consequence of direct and indirect relining of RPDs processed and relined with a lightcuring resin. Methods: The in vitro study comprised interim dentures in the maxilla, interim dentures and RPDs in the mandible (Premium teeth®, Versyo.com®: Heraeus-Kulzer). Each of the three dentures was relined with a lightcuring relining material (Veryo.com HD®, Heraeus-Kulzer) ten times in the indirect technique, five times in the direct mouth open technique and five times in the direct mouth closed technique. Occlusal contacts of a total of 60 relinings were documented before and after relining. For the descriptive statistical analysis of the occlusal contacts (0= no contact, 1= contact) the program Microsoft® Excel 97 SR-1 was used. Results: The results for the indirect procedure documented for each denture design an ideal occlusal stability (at least one contact per tooth) after relining. The results of the direct, mouth open procedure revealed for interim dentures in the maxilla a loss of all occlusal contacts on natural teeth (0.0) and only reduced contact on the artificial teeth (0.6). Similarities were found for interim dentures and RPDs in the mandible (RPD, natural teeth/artificial teeth: 0.10/0.3; interim dentures mandible, natural teeth/artificial teeth: 0.5/0.2). The direct mouth closed relining revealed good occlusal stability (all types of dentures, natural teeth: 1.0). For artificial teeth the following mean values were calculated: 0.8 (interim denture maxilla), 0.9 (interim denture and RPD mandible). However, the visual inspection documented slightly malpositioned clasp retainers. Conclusions: It can be concluded that indirect relining of RPDs in the dental laboratory with Versyo.com HD® is a reliable procedure for the preservation of occlusion. The direct relining technique revealed specific limitations not related to the material. | ||
| Seq #198 - Removable Partial Denture Research 10:15 AM-11:30 AM, Friday, 12 March 2004 Hawaii Convention Center Exhibit Hall 1-2 | ||
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