Caries Disease
Conditions
Interventions
The preparation steps for metal-free crowns will be performed according to the methods already elucidated in the scientific literature. For teeth preparation will be used the diamond tips: 1014, 4138,
Ivoclar Vivadent AG) and 2º Zirconia single crowns (Y-TZP - IPS e.max ZirCAD
Ivoclar Vivadent AG), with n=120 per group, with a total number of 240 crowns.
Procedure/surgery
Sponsors
Faculdade de Odontologia de Bauru
Faculdade de Odontologia de Bauru
Eligibility
Age
18 Years to 60 Years
Inclusion criteria
Inclusion criteria: Participants from 18 to 60 years old; which are indicated for total crowns on posterior permanent teeth; which are available for clinical follow-up throughout the evaluation period; participants willing to pay for laboratory costs; willing and able to undergo periapical / interproximal radiographic examination when necessary; be in accordance with the Informed Consent Form (TCLE); general health consistent with the clinical evaluation period; maxillo-mandibular relationship and occlusal stability.
Exclusion criteria
Exclusion criteria: History of allergy to some of the materials to be used in the research; pregnancy at the beginning of the experiment; use of drugs that may interfere with the oral environment; systemic or malignant diseases at the start of the study; impossibility to be submitted to the specific techniques for conducting the research; insufficient space for proper preparation of crowns; patients with parafunctional habits; pillars that endodontically and periodontally do not show predictability until the end of the evaluation period; periodontal disease; high risk of caries; absence of more than one tooth in the posterior region; unsatisfactory oral hygiene; use of removable partial dentures.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Metal-free crowns exhibit a similar clinical performance to that of conventional metaloceramic crowns, with the probable advantage of presenting better performance in the aesthetic aspect, because they do not have metal, and because they are made by CAD / CAM systems, usually have a better marginal adaptation. working with monolithic materials will be eliminated one of the failure factors of the metal-free restorations bilayer, which is the chippings of the ceramic cover. Will be used the modified criteria USPHS to clinically evaluate the crowns in this study, which evaluates: marginal adaptation, color alteration, marginal discoloration, restoration fracture, tooth fracture, restoration wear, wear of the antagonist, the presence of cavities, and postoperative sensitivity. | — |
Secondary
| Measure | Time frame |
|---|---|
| In relation to zirconia, there may be more zirconia crown decimations than with lithium disilicate crowns, since zirconia/tooth adhesion is known to be more difficult to achieve than for lithium disilicate/tooth disilicate. For clinical evaluation of the crowns will be used USPHS modified criteria. | — |
Countries
Brazil
Contacts
Public ContactAna;José Sanches Borges;Rubo
Faculdade de Odontologia de Bauru;Faculdade de Odontologia de Bauru
Outcome results
None listed