title: Matrix metalloproteinases -1, -2, -3, -7, -8, -12, and -13 in gingival crevicular fluid during orthodontic tooth movement: a longitudinal randomized split-mouth study.
abstract: This randomized split-mouth study aimed to examine the levels of matrix metalloproteinases (MMPs) -1, -2, -3, -7, -8, -12, and -13 in the gingival crevicular fluid (GCF) at different time points during orthodontic tooth movement. A total of 16 healthy orthodontic subjects (7 females, 9 males; mean age, 17.7 years) who needed their first upper premolars extracted were enrolled. One randomly chosen maxillary canine was subjected to a distalizing force and was considered to be the test side. The contralateral canine, which was not subjected to any force but was included in the orthodontic appliance, was used as a control side. GCF sampling was performed at both the mesial (tension) and distal (pressure) test and control sites at baseline, immediately before applying the orthodontic appliance, and after 1 and 24 hours and 7, 14, and 21 days. A multiplexed bead immunoassay was used to analyse the GCF samples. The mean levels of the MMP-1, -2, -3, -7, -8, -12, and -13 were not significantly different between the test and control groups in each time showed. The comparisons between the tension and pressure sites were also not significantly different at each individual time. A few variations focused on MMP-1 and -3, but the expression of MMP-8 was higher than that of the other MMPs. MMPs are released in sufficient quantities such that tooth movement occurs but with no significant increase in GCF levels.
authors.affiliation: Department of Orthodontics, School of Dentistry, State University of Rio de Janeiro, Brazil.
authors.forename: Cristiane
authors.initials: C
authors.lastname: Canavarro
authors.forename: Ricardo Palmier
authors.initials: RP
authors.lastname: Teles
authors.forename: Jonas
authors.initials: J
authors.lastname: Capelli Júnior
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D005883:Gingival Crevicular Fluid / Q000201:enzymology*; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D020781:Matrix Metalloproteinase 1 / Q000032:analysis; D053508:Matrix Metalloproteinase 12 / Q000032:analysis / Q000378:metabolism; D053509:Matrix Metalloproteinase 13 / Q000032:analysis / Q000378:metabolism; D020778:Matrix Metalloproteinase 2 / Q000032:analysis / Q000378:metabolism; D019278:Matrix Metalloproteinase 3 / Q000032:analysis / Q000378:metabolism; D020783:Matrix Metalloproteinase 7 / Q000032:analysis / Q000378:metabolism; D020784:Matrix Metalloproteinase 8 / Q000032:analysis / Q000378:metabolism; D020782:Matrix Metalloproteinases / Q000032:analysis / Q000378:metabolism*; D008437:Maxilla / Q000601:surgery; D009967:Orthodontic Appliances; D010519:Periodontium / Q000601:surgery; D014087:Tooth Movement Techniques; D055815:Young Adult
chemical_list: D053509:Matrix Metalloproteinase 13; D020782:Matrix Metalloproteinases; D019278:Matrix Metalloproteinase 3; D020783:Matrix Metalloproteinase 7; D020778:Matrix Metalloproteinase 2; D020784:Matrix Metalloproteinase 8; D053508:Matrix Metalloproteinase 12; D020781:Matrix Metalloproteinase 1