Comparision the effect of different materials and fabrication techniques of provisional crowns on its fracture strength (In vitro study)

Authors

  • Abdullah Amin Tishreen university
  • Rima Saker Tishreen University

Abstract

Aim: The aim of the study is to evaluate the effect of the fabrication technique and material type on the fracture strength of provisional crowns to determine the best material and the best fabrication technique of provisional crowns that achieves the benefits of using them .

Materials and Methods : Using 3D max software a Model of prepared tooth (Upper right incisor) was designed for receving a full-ceramic crown with (1) mm rounded shoulder finish line and convergence angel of (6°) then 20 metal specimens in a form of the previous designed model were printed using a metal printer .

Using Exocad software 20 provisional crowns in a form of upper right incisor were designed then using CAD-CAM technique 20 provisional crowns were fabricated and divided into two groups (each group contain 10 provisional crowns) :

The first Group : (10) Poly methyl methacrylate (PMMA) provisional crowns in a form of upper right incisor fabricated using milling technique (Shade A1) .

The second Group : (10) photopolymer resin provisional crowns in a form of upper right incisor fabricated using 3D printing technique (Shade A2) .

Each provisional crown was cemented to its metal model by using non-eugenol temporary cement then all specimens were stored in distilled water at 37°c for 48 hours in an incubator, later all specimens were subjected to 45° load on the incisal-middle thirds junction of the palatal surface under universal testing machine and the maximum load to produce fracture for each specimen was recorded in newton (N) .

Results: Significant difference was observed between groups in the fracture strength values at a 95% confidence norm and P-value ˂ 0.05 . The first group specimens (PMMA provisional crowns group fabricated using milling technique) had a higher fracture strength than the second group specimens .

Conclusions: It is recommended to fabricate provisional crowns of PMMA material using milling technique to achieve the benefits of using them, superiorly than photopolymer resin material using 3D printing technique . 

Downloads

Published

2023-12-03

How to Cite

1.
أمين ع, ريمة صقر. Comparision the effect of different materials and fabrication techniques of provisional crowns on its fracture strength (In vitro study) . Tuj-hlth [Internet]. 2023Dec.3 [cited 2024Nov.28];45(5):381-96. Available from: https://journal.tishreen.edu.sy/index.php/hlthscnc/article/view/16149

Issue

Vol. 45 No. 5 (2023): Tishreen University Journal for Research and Scientific Studies - Health Sciences Series

Section

Master student researches

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

The authors retain the copyright and grant the right to publish in the magazine for the first time with the transfer of the commercial right to Tishreen University Journal for Research and Scientific Studies - Health Sciences Series

 Under a CC BY- NC-SA 04 license that allows others to share the work with of the work's authorship and initial publication in this journal. Authors can use a copy of their articles in their scientific activity, and on their scientific websites, provided that the place of publication is indicted in  Tishreen University Journal for Research and Scientific Studies - Health Sciences Series   .  The Readers have the right to send, print and subscribe to the initial version of the article, and the title of  Tishreen University Journal for Research and Scientific Studies - Health Sciences Series  Publisher

journal uses a CC BY-NC-SA license which mean

You are free to:

  • Adapt — remix, transform, and build upon the material
  •  
  • The licensor cannot revoke these freedoms as long as you follow the license terms.

 

  • Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • NonCommercial — You may not use the material for commercial purposes.
  • ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
  • No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.