]>
IRCT20160213026538N6 IRCT 2021-01-07 Kermanshah University of Medical Sciences Determining the effectiveness of various gingival retraction techniques included cord,paste,laser Determining the effectiveness of various gingival retraction techniques included cord,paste,laser on the periodontal indicators ,after impression in fixed prosthesis:a randomized clinical trial study 2021-01-02 anticipated 60 Complete https://irct.ir/trial/53196 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Based on the random allocation law, after determining 60 maxillary and mandibularfirst molars based on statistical calculations, 20 cards for the cord group and 20 cards for paste group and 20 cards for laser group will be placed in a draw glass, then the cards will be dropped out randomly and without replacement and the 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, only the prosthodontist who do gingival retraction techniques knows about the groups and the outcome evaluators(other prosthodontist and the calibrated examiner) are blind to the assignment of each participant in each of the study groups. Participants in the study are blind toward their own group when they are aware of the similar costs and benefits of clinical treatments based on studies. Also the result analyst, have no information about the data of each group.It should be mentioned as the retraction have no differences in appearance after do ,double blinding is available. N/A Gingival retraction; impression in fixed prosthesis. Intervention 1: Intervention group: retraction gingiva with paste. Intervention 2: Intervention group: retraction gingiva with laser. Intervention 3: Intervention group: retraction gingiva with cord. 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 further information
public Ali Naeemi
The school of Dentistry, shariati St.
Kermanshah Iran (Islamic Republic of) 67139546581 +98 83 3727 7030 alinaeemi420@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) Patients who need their maxillary or mandibular first molar to be restored have the opposite teeth in functional occlusion and at least one proximal contact with the adjacent teeth have clinical sulcus depth between 2-3 mm and thick gingiva biotype dont be a smoker Acceptable oral hygiene and periodontally healthy(plaque index and bleeding on probing had to be below 20% previously to the prosthodontic treatment) ready to take part in the study and sign the testimonial 20 years 60 years Both have previous periodontal surgery have mobility in tooth use drugs having effect on periodontium patients have systemic disease Treatment - Other Treatment - Other Treatment - Other Intervention group: retraction gingiva with paste Intervention group: retraction gingiva with laser Intervention group: retraction gingiva with cord Recession. Timepoint: after one and two week. Method of measurement: scanned reference on first session. Gingival index. Timepoint: at the first session, after one and two week. Method of measurement: gingival index. Plaque index. Timepoint: at the first session, after one and two week. Method of measurement: plaque index. Bleeding index. Timepoint: at the first session, after one and two week. Method of measurement: bleeding index. Kermanshah University of Medical Sciences Approved 2020-12-22 Ethics Committee of Kermanshah University of Medical Sciences Ethics Committee, Department of Research and Technology, Central Building, Shahid Beheshti Boulevard, Kermanshah kermanshah Kermanshah Iran (Islamic Republic of)