PEEK crown for the last molar teeth

JRCT ID: jRCTs062210076

Registered date:17/02/2022

Basic Information

• Recruitment status: Not Recruiting
• Health condition(s) or Problem(s) studied: Caries of molar tooth
• Date of first enrollment: 01/07/2022
• Target sample size: 30
• Study type: Interventional
• Intervention(s): Tooth preparation: insurance publication in the future, abutment construction is resin core or the metal core with the silver alloy (in the case of metal allergy, no use the metal core, use the resin core).Crown making with PEEK materials, in order of the design with the scanner, a design by the CAD and cutting by CAM.Intra oral trial and proper adjustment: after adjustment in oral cavity, polishing crown.After alumina sand blast process to inner surface of the crown, setting with adhesive resin cement.

Outcome(s)

• Primary Outcome: Presence or absence of falling or fracture of crown, at the time of one month, three and six months after setting PEEK crown.
• Secondary Outcome: One month, three and six months after setting PEEK crown, crack of crown, condition of occlusal contact, pain, pain, secondary caries, condition of occlusal surface of crown, change in occlusal surface condition by model, dislocated crown color, attached dental plaque, condition of marginal gingiva, occlusal surface of antagonistic teeth, interproximal contact, necessity of retreatment, bite force and recovery of masticatory ability, satisfaction of the patient.

Key inclusion & exclusion criteria

• Age minimum: >= 20age old
• Age maximum: Not applicable
• Gender: Both
• Include criteria: At the time of the agreement, patient of 20 years or older. Upper or lower molar, sing le crown (connected two crowns, possible), antagonistic teeth are necessary (natural teeth or crowns restoration material, including bridges, excluding removable dentures). About 3mm height of abutment tooth can be secured after tooth preparation. Document agreement can be obtained for the participation in this study.
• Exclude criteria: Abutment tooth of the partial denture. The target tooth and the opposing teeth have severe periodontal disease (pockets more than 6mm, bone resorption, attachment loss more than tooth root long 1/2 more than furcation involvement 2 degrees). When root canal treatment is required due to severe caries, etc. Patients with a history of hypersensitivity such as rash or dermatitis to this material or (meth)acrylic acid monomer. Inappropriate though a study partaker or member (of a research project) carried out this study.

Related Information

• Primary Sponsor: Tsuga Kazuhiro
• Source(s) of Monetary Support: ULTI-Medical,Daicel-Evonik Ltd,SHOFU INC.