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IRCT20160213026538N7 IRCT 2022-01-28 Kermanshah University of Medical Sciences Clinical evaluation of marginal adaptation Clinical evaluation of marginal adaptation of three-unit metal ceramic restoration fabricated using conventional impression technique and the new CAD/CAM technology in a randomized clinical trial study 2022-01-30 anticipated 33 Complete https://irct.ir/trial/61511 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Prevention, Randomization description: A table of random numbers is used for randomization. In Excel software environment, four-digit codes are generated using the RANDBETWEEN command. Each patient is assigned a 4-digit code. If the last digit on the right is 1, 2 or 5, the patient is in the casting group, and if the last digit is 6, 3 or 8, the patient is assigned to the CAD Milling group. And if it is 7, 9 or 4, it is assigned to the CAD Ceramill Sintron group (Number zero is not considered). All codes are Written on papers and are kept in specific envelopes, which are randomly arranged. Registration and evaluation of entrance criteria is done by the secretary. When all the criteria for entering the study have been reviewed and the patient's information have been recorded, the secretary in charge of conducting the study will give one of these envelopes to the doctor. The doctor will decide on the treatment plan based on the specified code. Random sequencing is performed by a statistical and epidemiological consultant using Excel software. The secretary only cooperates to conduct the study and has no information about the study hypothesis or the group codes. The outcome assessor also has no information on how patients are coded and assigned, but the doctor doing the assignment of intervention is aware of the group codes, Blinding description: This study is a double-blinded trail. Patients will not be aware of the process of fabricating restorations and will also not be aware of which study group they are in. Also, the person in charge of evaluating the outcome has no information about how restorations are made. Therefore, both the patient and the outcome assessor will be unaware of how the allocation process is done. N/A Marginal mismatch. Intervention 1: Intervention group: Traditional casting method. Intervention 2: Intervention group: CAD / Milling method from hard metal blocks. Intervention 3: Intervention group: CAD / Ceramill Sintron method from soft metal blocks. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no more information
public Vahid Vahedi
The school of Dentistry, shariati Street, Kermanshah
Kermanshah Iran (Islamic Republic of) 6713954658 +98 83 3724 8531 v.vahedidds@gmail.com Kermanshah University of Medical Sciences scientific Hedaiat Moradpour
Department of Prosthodontics, The school of Dentistry, Kermanshah University of Medical Sciences , Iran
Kermanshah Iran (Islamic Republic of) 6713954658 +98 83 3729 6910 h.moradpour@gmail.com Kermanshah University of Medical Sciences Iran (Islamic Republic of) Periodontal health, plaque index and BOP should be below 20% before prosthetic treatment Abutment teeth require restoration Abutment teeth Have enough periodontal support for three-unit restoration. Abutment Teeth have sufficient length of preparation Abutment teeth have a positive long-term prognosis The patient is willing to participate in our study and sign the consent form 22 years no limit Both The patient has a systemic disease that affects clinical outcomes The patient is unwilling or unable to maintain adequate oral hygiene The patient has periodontitis, severe gingivitis and high caries activity The patient has obvious signs and symptoms of bruxism or clenching Abutment teeth require periodontal surgery before preparation Abutment teeth have second or higher degree of mobility Abutment teeth have clinical signs Prevention Prevention Prevention Intervention group: Traditional casting method Intervention group: CAD / Milling method from hard metal blocks Intervention group: CAD / Ceramill Sintron method from soft metal blocks Marginal restoration adaptation. Timepoint: Before and after veneering. Method of measurement: 1. Parallel bitwing radiograph 2. Probe 3. Silicone replica. Internal and occlusal adaptation. Timepoint: Before and after veneering. Method of measurement: 1. Parallel byte wing radiography 2. Probe 3. Silicone replica. Kermanshah University of Medical Sciences Approved 2022-01-24 Ethics committee of Kermanshah University of Medical Sciences Shahid Beheshti Boulevard - Central Building of Kermanshah University of Medical Sciences Kermanshah Kermanshah Iran (Islamic Republic of)