Can Amoxicillin and Clavulanic Acid Impregnated Plaster of Paris Beads Serve as an Effective Alternative to Systemic Antibiotics for Third Molar Surgeries? A Split Mouth Randomized Clinical Trial.

Purpose: The present work was a pilot study undertaken to evaluate the effectiveness of amoxicillin and clavulanic acid impregnated plaster of paris beads for prevention of infection of third molar extraction sockets.

Materials And Methods: This was a prospective, randomized, split mouth clinical trial done on 16 patients (32 sites) who required surgical extraction of mandibular third molars. Control arm patients were given Tab. amoxicillin 500 mg with clavulanic acid 125 mg (Tab. Klavimed 625 mg, Indomed, India), thrice daily for 3 days after extraction, whereas test arm patients received Antibiotic Impregnated Microbeads (AIM), containing Amoxicillin 500 mg and Clavulanic Acid 100 mg placed in situ in the extraction socket. The primary outcome parameter was infection and the secondary outcome parameters were pain, trismus, swelling and wound healing.

Results: None of the patients in either group had post operative infection. There was no significant difference in pain intensity between the two groups (1st day  = 0.41; 3rd day  = 0.38, 7th day  = 0.37). Both the groups were also similar with respect to swelling ( = 0.596, 0.146, 0.871, 0.820 on 1st, 3rd, 7th, 15th post-op day ,respectively).

Conclusion: Amoxycillin with clavulanic acid impregnated PoP beads appears to be as effective as oral 3 day amoxicillin with clavulanic acid regime for prevention of 3 M socket infection.