Clinical Performance and Wear Mechanism of Hot-Pressed Ceramic Crowns

The recruitment status of this study is unknown because the information has not been verified recently.
Verified March 2013 by Mahidol University.
Recruitment status was  Active, not recruiting
Thailand Research Fund
Information provided by (Responsible Party):
Kallaya Suputtamongkol, Mahidol University Identifier:
First received: April 25, 2009
Last updated: March 5, 2013
Last verified: March 2013

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.

Condition Intervention
Ceramic and Dental Enamel Wear
Other: lithia-disilicate-based crown

Study Type: Interventional
Study Design: Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Clinical Performance and Wear Mechanism of Hot-Pressed Ceramic Crowns

Further study details as provided by Mahidol University:

Primary Outcome Measures:
  • Clinical performance [ Time Frame: 5 years ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • wear rate [ Time Frame: 2 years ] [ Designated as safety issue: No ]

Enrollment: 30
Study Start Date: May 2004
Estimated Study Completion Date: April 2014
Estimated Primary Completion Date: April 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: A
ceramic crown
Other: lithia-disilicate-based crown
all-ceramic crown
Other Name: ceramic 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.


Ages Eligible for Study:   18 Years to 60 Years
Genders Eligible for Study:   Both
Accepts 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
  Contacts and Locations
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Please refer to this study by its identifier: NCT00889239

Faculty of Dentistry, Mahidol University
Bangkok, Thailand, 10400
Sponsors and Collaborators
Mahidol University
Thailand Research Fund
Principal Investigator: Kallaya Suputtamongkol Mahidol University
  More Information

No publications provided

Responsible Party: Kallaya Suputtamongkol, Dr., Mahidol University Identifier: NCT00889239     History of Changes
Other Study ID Numbers: MRG 4780066
Study First Received: April 25, 2009
Last Updated: March 5, 2013
Health Authority: Thailand: Ethical Committee

Keywords provided by Mahidol University:
wear rate
opposing enamel processed this record on March 26, 2015