Atraumatic extraction of maxillary premolar teeth (on the Right, left side) was done; Subsequently, the patients were randomly divided into two equal groups: A group (Extraction + filled with a Simvastatin solution impregnated gelatin sponge) and B group (Extraction + without Simvastatin solution impregnated gelatin sponge), were placed in one of the sockets; the pain level is recorded according to the VAS scores at the intervals of before treatments, also Postoperative analog pain scores were assessed in 30 minutes, 6 hours, 12 hours and 24 hours.

The method of procedure was performed by the same surgeon under local anesthesia (Lidocaine 2% with epinephrine 1:100,000, made by Darou Pakhsh Pharmaceutical Co; Tehran-Iran) to avoid bias. All two first premolars were extracted carefully, have used periotome as a means of atraumatic extraction that facilitated the removal of teeth with minimum damage to the surrounding alveolar bone, teeth to be extracted should have minimum periapical changes radiographically; with decreasing soft tissue reflection; the socket was tan gently irrigated with normal saline and hemostasis was achieved. It must be noted that A group (Extraction + Simvastatin filled with Simvastatin (Poursina Pharmaceutical Co. Tehran-Iran) solution impregnated gelatin sponge (Maquira Industry Dental Products S.A. Brazil) and B group (Extraction + without Simvastatin solution impregnated gelatin sponge), was placed in one of the sockets.

Inclusion Criteria:

Healthy patients Age group 18-35 years Sulcular probing not more than 3 mm and no redness The determination for extraction of teeth (two maxillary first premolars)for orthodontic treatment A tooth requiring an atraumatic extraction technique.

Exclusion Criteria:

Systemic diseases Smoking habits; pregnancy or breastfeeding Periodontitis; Teeth having radiographically obvious large periapical Lesion(abscess/granuloma/cyst) T the history of Chemotherapy Radiation therapy Periodontal and the use of any medicine (antibiotics; steroids; non-steroidal anti-inflammatory drugs Allergy to Simvastatin.

will published

This event was a double-blind study (neither the patients nor the clinicians were aware of the rinsing solution used). Consequently, all periods of treatment, clinical parameters were recorded by an examiner who was blinded to the kind of medication received by the subjects while another clinician gave treatment.