Clinical Performance and Wear Mechanism of Hot-Pressed Ceramic Crowns

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00889239

Enrollment

Registered

2009-04-28

Start date

2004-05-31

Completion date

2015-04-30

Last updated

2015-05-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Ceramic and Dental Enamel Wear

Keywords

ceramic, wear rate, opposing enamel

Brief summary

The objectives of this study are to characterize the clinical performance and wear mechanisms of all-ceramic posterior crowns. The wear rate of all-ceramic crowns and opposing enamel in selected patients will be quantified. The relationship of each subject's maximum clenching force and wear rate will also be analyzed.

Detailed description

High strength ceramics have been used in dentistry for constructing fixed partial denture. Their advantages are their acceptable fracture resistance, excellent biocompatibility, moderate opacity, etc. Because the increase in demand for more esthetic restoration, various ceramic materials have been used as a core material for several all-ceramic systems. Their properties have been investigated extensively in many in vitro studies. Currently, there are not much results regarding clinical performance and wear mechanism of ceramic-based prosthesis and more information are required for future research.

Interventions

OTHERlithia-disilicate-based crown

all-ceramic crown

Study design

Allocation

Intervention model

SINGLE_GROUP

Primary purpose

TREATMENT

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to 60 Years

Healthy volunteers

Yes

Inclusion criteria

* Occlusion: At least 20 remaining teeth for each patient, and at least one posterior endodontically treated tooth with natural opposing teeth * Bruxism: No evidence based on an intraoral examination * Dental history: No evidence of either moderate or severe periodontal disease * Medical history: Good to excellent general health

Exclusion criteria

* Periodontal status: Pocket depth greater than 4 mm * Occlusion: * Evidence of bruxism or excessive biting or clenching force * Abutment tooth that opposes a removable partial denture * Abutment tooth for fixed partial dentures * Gingival recession of an abutment tooth more than 1 mm from the cementoenamel junction * Tooth with first or second degree of tooth mobility * Tooth with extensive carious lesions

Design outcomes

Primary

Measure	Time frame
Clinical performance	5 years

Secondary

Measure	Time frame
wear rate	2 years

Countries

Thailand

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026