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IRCT20160213026538N4 IRCT 2019-09-06 Kermanshah University of Medical Sciences Evaluation of single crowns marginal adaptation, fabricated in 3 different methods Clinical evaluation of the effectiveness of 3 laboratory fabrication methods on marginal adaptation of metal-ceramic single crowns, which are impressed digitally 2019-09-23 anticipated 60 Complete https://irct.ir/trial/41892 interventional Randomization: Randomized, Blinding: Triple blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Based on the random allocation rule, after determining 60 maxillary and mandibular first molars based on statistical calculations, 20 cards for the Casting group, 20 cards for the CAD/Milling group, and 20 cards for the CAD/Ceramill Sintron group will be placed in a draw glass, then the cards will be dropped out randomly and without replacement and resulting sequence will be recorded. Then, 60 envelopes are prepared and each random sequence created is recorded on a card and the cards are inserted into the envelope respectively. In order to maintain a random sequence, the envelopes are numbered to the same. In the end, the door covers are enclosed in boxes and placed in a box respectively. At the time of the start of the registration of the participants, according to the order of entry of qualified participants to study, one of the envelopes are opened in sequence and the participant's assigned group is revealed, Blinding description: In this clinical trial study, the main researchers involved in, the prostodontic and student are blind to the assignment of each participant in each of the study groups. Participants in the study are blind toward their own group while they are aware of the similar costs and benefits of clinical treatments based on studies. Also the result analyst and the outcome evaluator, have no information about the data of each group.The Laboratorist is not also aware of each group assignment. Only a health care worker knows about the groups. N/A Marginal adaptation of single unit restorations. Intervention 1: Intervention group: Application of metal ceramic crowns fabricated by CAD/Milling technique. Intervention 2: Intervention group: Application of metal ceramic crowns fabricated by CAD/Ceramill Sintron. Intervention 3: Intervention group: Application of metal ceramic crowns fabricated by traditional and wax removal. 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 No more information
public Hanieh Hamekhani
The school of Dentistry, shariati St.
Kermanshah Iran (Islamic Republic of) 67139546581 +98 83 3727 7030 hanni.hamekhani@yahoo.com Kermanshah University of Medical Sciences scientific Hedaiat Moradpoor
Department of Prosthodontics, The School of Dentistry, Kermanshah University of Medical Siences, Shariati St.
Kermanshah Iran (Islamic Republic of) 67139546581 +98 83 3729 6910 h.moradpour@kums.ac.ir Kermanshah University of Medical Sciences Iran (Islamic Republic of) Good general health (No systemic disease affecting the clinical outcomes) Periodontal health (Plaque index and BOP should be under 20% before prosthodontic treatment) No obvious signs or symptoms of bruxism and/or clenching (Bruxism such as attrition and fractures on the patient's natural tooth or reconstructions, no pain on muscular palpation or tendomyopathy, no pain due to joints, no self reported bruxism or clenching) Abutment teeth requires reconstruction (abutment teeth with existing extensive cavities, fillings or crowns) Non-vital abutment teeth with positive long-term prognosis based on clinical and radiological assessment (No obvious peri-apical or periodontal lesions) Sufficient periodontal support for single crown restoration and minimum mobility Sufficient tooth preparation length to ensure retention and resistance forms Patients should be satisfied to join our study and sign the consent no limit no limit Both Patients that are not willing or able to perform oral hygiene ( Plaque index and BOP more than 20%) Abutment tooth with clinical signs Tooth with grade two or more mobility parafunctional habits Periodontitis, severe gingivitis, poor oral hygiene and high active caries Treatment - Devices Treatment - Devices Treatment - Devices Intervention group: Application of metal ceramic crowns fabricated by CAD/Milling technique Intervention group: Application of metal ceramic crowns fabricated by CAD/Ceramill Sintron Intervention group: Application of metal ceramic crowns fabricated by traditional and wax removal Marginal adaptation of restorations. Timepoint: Before and after veneering the restorations. Method of measurement: Adaptation is measured by using 3 methods: 1.Parallel bite wing radiography 2.Touching by a sonde 3. Silicone Replica technique. Kermanshah Univeristy of Medical Sciences Approved 2019-08-31 Ethic Committee of Kermanshah University of Medical Sciences Ethics Committee, Department of Research and Technology, Central Building, Shahid Beheshti Blvd. Kermanshah Kermanshah Iran (Islamic Republic of)