sidebar-ad

European Journal of Prosthodontics and Restorative Dentistry

The Effect of Surface Preparation of Acrylic Teeth

Abstract

Purpose: The impact of material on the adaptation of lithium disilicate inlays is poorly documented. This in vitro study aims at comparing the fit accuracy of pressed and milled inlays obtained from conventional impression and laboratory-based computer-aided design and computer-aided manufacturing. Material and Methods: A typodont molar was prepared for a mesio-occlusal ceramic inlay. The stone die generated from one conventional impression was scanned once using a laboratory scanner and the same design was used to produce 15 pressed lithium disilicate inlays from milled wax patterns (group CIDW), and 15 inlays from lithium disilicate blanks (group CICAD) with
a 5-axis milling machine. Marginal and internal discrepancies were measured using the replica technique. Mixed-model ANOVA was applied to assess differences according to material and gap location at P<0.05. Results: Material and discrepancy location had a significant effect on fit measurements. Group CIDW showed significantly smaller marginal (37.4 μm) and internal (69.2 μm) discrepancies than group CICAD (59.6 μm and 93.7 μm respectively). Marginal discrepancies were significantly smaller than internal discrepancies within both groups. Conclusions: Pressed inlays generated from conventional impression and milled wax patterns yielded better fit accuracy than milled inlays obtained from conventional impression and subtractive manufacturing.

Authors

Dr. Maria Pispili, Prof. Argirios Pissiotis, Prof. Konstantinos Michalakis

Articles from this issue

Title / DOI Access Page Start Page End Purchase
An Investigation into the Trueness and Precision of Copy Denture Templates Produced by Rapid Prototyping and Conventional Means
10.1922/EJPRD_01716Davda07
no access 186 192 £10.00
A Measurement Protocol for the Marginal and Internal Fit of All-Ceramic Crowns
10.1922/EJPRD_01735Abdulhameed08
no access 193 200 £10.00
The Effect of Core and Veneering Design on the Optical Properties of Polyether Ether Ketone
10.1922/EJPRD_01720Zeighami08
no access 201 208 £10.00
The Effect of Surface Preparation of Acrylic Teeth
10.1922/EJPRD_01713Pispili10
no access 209 218 £10.00
A Randomised Controlled Trial of a Universal Bonding Agent at Three Years: Self Etch vs Total Etch
Etching10.1922/EJPRD_01692Burke08
no access 220 227 £10.00
Adhesion and Early Colonization of S. Mutans on Lithium Disilicate Reinforced Glass-Ceramics, Monolithic Zirconia and Dual Cure Resin
10.1922/EJPRD_01711Viitaniemi07
no access 228 234 £10.00
  • free access Free Access
  • no access No Access
  • full access Full Access

Subscriptions