title: Association of matrix metalloproteinase 1 gene promoter mutation and residual ridge resorption in edentulous patients of South Indian origin.
abstract: BACKGROUND
  Matrix metalloproteinase (MMP) are involved in bone transformation at the extraction site postdental extraction. We examined the genetic association between single nucleotide polymorphisms of MMP-1 and continuous atrophy of edentulous mandible.
  
  
  METHODS
  Buccal cells from 33 edentulous patients were collected using sterile wooden spatula and were suspended in 15 ml falcon tubes containing 1.5 ml of cell lysis buffer, without proteinase K. The cells were transported to the laboratory on ice and were stored at -20°C until being processed.
  
  
  RESULTS
  Of the samples analyzed, 26 edentulous patients (78.8%) carried 2G allele, while 7 of them (21.2%) carried 1G allele.
  
  
  CONCLUSIONS
  The patients with the alveolar bone resorption exhibited more of 2G allele while only 21.2% of them showed 1G allele, associated with excessive atrophy of edentulous mandible. This study may provide genetic background to identify susceptible individuals prone to develop jawbone atrophy after dental extraction.
authors.affiliation: Department of Prosthodontics, Meenakshi Ammal Dental College, Chennai, Tamil Nadu, India.
authors.forename: S Shyam
authors.initials: SS
authors.lastname: Sundar
authors.affiliation: Department of prosthodontics, Sree Balaji Dental College and Hospital, Chennai, Tamil Nadu, India.
authors.forename: S Ragavendar
authors.initials: SR
authors.lastname: Jayesh
authors.affiliation: Department of Prosthodontics, Madha Dental College, Chennai, Tamil Nadu, India.
authors.forename: Sharmila
authors.initials: S
authors.lastname: Hussain
keywords: 1G/2G allele; Matrix metalloproteinases; matrix metalloproteinase-1; polymorphism; ridge resorption