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  • Title: Relationship between unstimulated salivary flow rate and saliva composition of healthy children in Taiwan.
    Author: Wu KP, Ke JY, Chung CY, Chen CL, Hwang TL, Chou MY, Wong AM, Hu CF, Lee YC.
    Journal: Chang Gung Med J; 2008; 31(3):281-6. PubMed ID: 18782951.
    Abstract:
    BACKGROUND: Saliva is one of the most important factors in regulating oral health, with flow rate and composition changing throughout development and during disease. In view of the shortage of data, the present study aimed to shed light on the relationship between unstimulated salivary flow rate and saliva composition of healthy children in Taiwan. METHODS: Forty-four normal, healthy children from 3-14 years of age were divided into three age groups: pre-school, elementary school and junior-high school. All participants received salivary flow rate, pH and saliva composition analysis under unstimulated conditions. One-way ANOVA and Pearson's correlation were used. Statistical significance was set at p < 0.05. RESULTS: Our results suggest that, under unstimulated conditions, the salivary flow rate of the elementary school group was greater than that of the pre-school group (p < 0.05). No difference in pH was found among the three groups. Intergroup salivary calcium, phosphorus and amylase did not reach statistical difference. As the flow rate increased, the pH increased (r = 0.364, p < 0.05) but the protein level decreased (r = -0.473, p < 0.05). In addition, salivary protein was positively correlated to age (r = 0.479, p < 0.05) and negatively correlated to pH (r = -0.361, p < 0.01). CONCLUSION: Age-related increase in the unstimulated salivary flow rate of pre-school and elementary school groups was noted. As the flow rate increased, the pH increased but the protein level decreased. The information obtained may serve as reference values for the growing interest in saliva as a diagnostic tool, especially monitoring those with neurological or oral motor dysfunction.
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