Relationship among salivary carbonic anhydrase VI activity and flow rate, biofilm pH and caries in primary dentition

Author(s)

Fernanda Frasseto

• Document type: Master's Dissertation
• Press: Piracicaba, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Faculdade de Odontologia de Piracicaba
• Defense date: 2011-02-25

Examining board members

Marinês Nobre dos Santos; Lidiany Karla Azevedo Rodrigues; Elaine Pereira da Silva Tagliaferro

• Advisor: Regina Celia Rocha Peres; Marinês Nobre dos Santos

Abstract

This study aimed to determine the activity of the carbonic anhydrase isoenzyme VI (CAVI) in saliva of preschool children with caries and investigate the relationship between caries and the salivary CAVI activity, salivary flow rate (SFR) and biofilm pH before and after a 20% sucrose mouthrinse in preschool children with caries. Thirty preschool children aging from 45.3 to 80.3 months were divided into two groups: caries-free group (CF) and caries group (C). Clinical examinations were conducted by one examiner (kappa=0.95) according to WHO criteria (dmfs) + early caries lesions. From each subject, CAVI activity, SFR and plaque pH were determined before and after a sucrose rinse. The results were submitted to Wilcoxon and Spearman correlation tests (?=0.05). The results showed that the pre-rinse CAVI activity and its variation were higher in saliva from caries children than from CF children. No difference was found between the two groups in the post- rinse salivary CAVI activity. After mouthrinse, the biofilm pH difference were lower in both groups (p=0.0012 and p=0.0037 for the C and CF group respectively). Also, after the sucrose rinse, SFR significantly increased in C and CF groups, (p=0.0003 and p=0.0037). The variation of salivary CA VI activity was negatively correlated with caries (r= -0.501 p=0.005). Child's age showed a positive correlation with caries (r=0.456 and p=0.011). These results suggest that variation of salivary CA VI activity and child's age are associated with dental caries of preschool children (AU)

• FAPESP's process: 08/02412-6 - Study of the carbonic anhydrase VI activity and its association with biofilm biochemical parameters and early childhood caries in pre-school children
• Grantee: Fernanda Frasseto
• Support Opportunities: Scholarships in Brazil - Master