SciELO - Scientific Electronic Library Online

 
vol.17 issue3The orthodontist's profile in Minas GeraisComparative analysis of load/deflection ratios of conventional and heat-activated rectangular NiTi wires author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Dental Press Journal of Orthodontics

On-line version ISSN 2176-9451

Abstract

PITHON, Matheus Melo et al. Quantitative assessment of S. mutans and C. albicans in patients with Haas and Hyrax expanders. Dental Press J. Orthod. [online]. 2012, vol.17, n.3, pp. 1-6. ISSN 2176-9451.  http://dx.doi.org/10.1590/S2176-94512012000300006.

OBJECTIVE: To assess and compare the number of Streptococcus mutans and Candida albicans colonies in patients with Haas and Hyrax appliances before and after insertion. METHODS: The sample consisted of 84 patients requiring orthodontic treatment. For all patients a midpalatal suture expansion was indicated. Patients were randomly divided into Group HA, who used the Haas appliance (n = 42) and Group HY, who used the Hyrax appliance (n = 42). Initially and thirty days after appliance insertion all patients were submitted to saliva collections. The saliva was diluted followed by seeding in Mitis Salivarius and CHROMagar media, for growth of S. mutans and C. albicans respectively. RESULTS: Results showed statistically significant difference between groups HA and HY for Streptococcus mutans and Candida albicans (p <0.05). Haas appliance promoted greater S. mutans and C. albicans proliferation when compared to Hyrax appliance. CONCLUSION: The Haas appliance favored greater proliferation of S. mutans and C. albicans when compared with the Hyrax appliance. Insertion of the appliances resulted in greater buildup of microorganisms.

Keywords : Orthodontics; Orthodontic appliances; Streptococcus mutans; Candida albicans; Palatal expansion technique.

        · text in English     · pdf in English