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Clinical Performance and Wear Mechanism of Hot-Pressed Ceramic Crowns

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ClinicalTrials.gov Identifier: NCT00889239
Recruitment Status : Completed
First Posted : April 28, 2009
Last Update Posted : May 15, 2015
Information provided by (Responsible Party):

Study Description
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.

Condition or disease Intervention/treatment
Ceramic and Dental Enamel Wear 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 Design

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 30 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Clinical Performance and Wear Mechanism of Hot-Pressed Ceramic Crowns
Study Start Date : May 2004
Primary Completion Date : April 2015
Study Completion Date : April 2015
Arms and Interventions

Arm Intervention/treatment
Experimental: A
ceramic crown
Other: lithia-disilicate-based crown
all-ceramic crown
Other Name: ceramic crown

Outcome Measures

Primary Outcome Measures :
  1. Clinical performance [ Time Frame: 5 years ]

Secondary Outcome Measures :
  1. wear rate [ Time Frame: 2 years ]

Eligibility Criteria

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
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

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): 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

Responsible Party: Kallaya Suputtamongkol, Dr., Mahidol University
ClinicalTrials.gov Identifier: NCT00889239     History of Changes
Other Study ID Numbers: MRG 4780066
First Posted: April 28, 2009    Key Record Dates
Last Update Posted: May 15, 2015
Last Verified: May 2015

Keywords provided by Kallaya Suputtamongkol, Mahidol University:
wear rate
opposing enamel