Comparison of Proximal Contacts and Contours in Class II Composite Restoration With Pre-cured Composite Inserts Versus Contact Making Instrument Technique. A Randomized Control Clinical Trial.

Study design : randomized control clinical trial with three intervention arms

Study setting : operative department , foundation university college of dentistry Islamabad Pakistan.

Sample size : the sample size was calculated using the NCSS PASS software. A total od 180 patients will be tested in the study divided in three groups of 60 patients each. Consent will be taken from pateints on a standardized form approved by the ethics review committe in the operatory where the initial assessment will be done.

Procedure:

1. number of operaters will be restricted two, with similar level of experience in order to minimize operater variation
2. the investigator and co investigator will calibrate each other on the sequence of the procedure and assessment to enhance standardization of procedure
3. local anaesthesia will be given to patients using lidocaine 2% solution available for dental use in 1.8 ml carpule
4. rubber dam will used for isolation and moisture control in the working field.
5. the tooth to be restored will be seperated from the adjacent tooth using wooden wedges.this will allow seperation of teeth.
6. cavity preparation will be done using a high speed handpiece(W&H) with a round bur(prima) (no1/6 or 1/4). After initial penetration through enamel the carious lesion will be excavated using a a carbide bur in a slow speed handpiece.