This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Clinical Performance and Wear Mechanism of Hot-Pressed Ceramic Crowns

This study has been completed.
Thailand Research Fund
Information provided by (Responsible Party):
Kallaya Suputtamongkol, Mahidol University Identifier:
First received: April 25, 2009
Last updated: May 14, 2015
Last verified: May 2015
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: Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Clinical Performance and Wear Mechanism of Hot-Pressed Ceramic Crowns

Further study details as provided by Kallaya Suputtamongkol, Mahidol University:

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

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

Enrollment: 30
Study Start Date: May 2004
Study Completion Date: April 2015
Primary Completion Date: April 2015 (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   (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
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

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

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: May 14, 2015

Keywords provided by Kallaya Suputtamongkol, Mahidol University:
wear rate
opposing enamel processed this record on September 20, 2017