IN-VITRO CROWN-DENTIN INTERFACE ANALYSIS OF A NEW MINIINVASIVE TOOTH-PREPARATION TECHNIQUE FOR MONOLITHIC CERAMIC CROWN RESTORATIONS
C. Lorenzi*, A. Pinto, D. Severino and F. Lio
Department of Chemical Science and Technologies, University of Rome “Tor Vergata”, Rome, Italy.
Correspondence to:
Claudia Lorenzi, MD,
Department of Chemical Science and Technologies,
University of Rome “Tor Vergata”,
Rome, Italy.
e-mail: claudialorenzimartinez@gmail.com
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Received: 12 February, 2019 |
ISSN: 2038-4106
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ABSTRACT
Modern restorative dentistry developed safe adhesive bonding techniques, which improved invasiveness minimally in restoring compromised teeth. However, ceramic restoration failures result from a combination of several complex factors, such as the geometry of teeth preparation, mechanical properties of the material, cementum and function and parafunction of the patients. The present study investigated differences between a new technique (anatomical, functional geometry -AFG) and a standard preparation technique (ST) in the crow-dentin area. Sixty human-extracted teeth were duplicated, prepared and digitized to analyze the preparation area. The difference was statistically significant as in the ST group; the crown-dentin surface was 112,16 ± 25,51 mm2, while for AFG was 138,89 ± 39,06 mm2 (p = 0.001). The proposed preparation technique could be a reliable option to provide a more uniform and mini-invasive reduction of restored teeth when performing a monolithic ceramic restoration.
KEYWORDS: Tooth preparation, mini-invasive, adhesive restoration, monolithic crown