Clinical Performance and Wear Mechanism of Hot-Pressed Ceramic Crowns

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.

Study Overview

• Status: Completed
• Conditions: Ceramic and Dental Enamel Wear
• Intervention / Treatment: Other: lithia-disilicate-based crown

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.

• Study Type: Interventional
• Enrollment (Actual): 30
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Thailand
  • Bangkok, Thailand, 10400
    • faculty of dentistry, Mahidol university

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 60 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

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

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: A; ceramic crown	Other: lithia-disilicate-based crown; all-ceramic crown; Other Names: ceramic crown

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Clinical performance	5 years

Secondary Outcome Measures

Outcome Measure	Time Frame
wear rate	2 years

Collaborators and Investigators

• Sponsor: Mahidol University
• Collaborators: Thailand Research Fund
• Investigators: Principal Investigator: Kallaya Suputtamongkol, Mahidol University

Study record dates

Study Major Dates

• Study Start: May 1, 2004
• Primary Completion (Actual): April 1, 2015
• Study Completion (Actual): April 1, 2015

Study Registration Dates

• First Submitted: April 25, 2009
• First Submitted That Met QC Criteria: April 27, 2009
• First Posted (Estimate): April 28, 2009

Study Record Updates

• Last Update Posted (Estimate): May 15, 2015
• Last Update Submitted That Met QC Criteria: May 14, 2015
• Last Verified: May 1, 2015

More Information

Terms related to this study

• Keywords: ceramic; wear rate; opposing enamel
• Other Study ID Numbers: MRG 4780066

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No