title: Simvastatin local drug delivery in smokers with chronic periodontitis: a randomized controlled clinical trial.
abstract: BACKGROUND
  Simvastatin (SMV) is a specific competitive inhibitor of 3-hydroxy-2-methyl-glutaryl coenzyme A reductase. Statins have recently been shown to promote bone formation. This study was designed to investigate the effectiveness of SMV 1.2% in an indigenously prepared biodegradable controlled release gel as an adjunct to scaling and root planing (SRP) in the treatment of smokers with chronic periodontitis.
  
  
  METHODS
  Forty patients were categorized into two treatment groups: SRP plus SMV 1.2% and SRP plus placebo. Clinical parameters were recorded at baseline and at 3, 6 and 9 months; they included modified sulcus bleeding index (mSBI), probing depth (PD) and clinical attachment level (CAL). At baseline, after 6 months and 9 months, radiologic assessment of intrabony defect (IBD) fill was done using computer-aided software.
  
  
  RESULTS
  Mean probing depth reduction and mean clinical attachment level gain was greater in the SMV group than the placebo group at all visits. Furthermore, significantly greater mean percentage of bone fill was found in the SMV group (32.37 ± 10.23%) compared to the placebo (4.18 ± 5.39%).
  
  
  CONCLUSIONS
  There was a greater decrease in mSBI and PD and more CAL gain with significant IBD fill at sites treated with SRP plus locally delivered SMV in smokers with chronic periodontitis.
authors.affiliation: Department of Periodontics, Government Dental College and Research Institute, Bangalore, India.
authors.forename: N S
authors.initials: NS
authors.lastname: Rao
authors.forename: A R
authors.initials: AR
authors.lastname: Pradeep
authors.forename: P
authors.initials: P
authors.lastname: Bajaj
authors.forename: M
authors.initials: M
authors.lastname: Kumari
authors.forename: S B
authors.initials: SB
authors.lastname: Naik
mesh_terms: D000328:Adult; D016301:Alveolar Bone Loss / Q000517:prevention & control*; D050071:Bone Density Conservation Agents / Q000008:administration & dosage*; D017024:Chemotherapy, Adjuvant; D055113:Chronic Periodontitis / Q000628:therapy*; D003692:Delayed-Action Preparations; D012534:Dental Scaling; D005782:Gels; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000008:administration & dosage; D008297:Male; D008875:Middle Aged; D010512:Periodontal Index; D016745:Root Planing; D019821:Simvastatin / Q000008:administration & dosage*; D012907:Smoking / Q000009:adverse effects*
chemical_list: D050071:Bone Density Conservation Agents; D003692:Delayed-Action Preparations; D005782:Gels; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors; D019821:Simvastatin