Acid producing.
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The known risk factors for caries include intraoral high count of acidogenic and cariogenic bacteria, poor quantity and quality of saliva, susceptible tooth surface, presence of faulty dental restorations, inadequate brushing habits, high sugar intake and poor knowledge and attitude towards oral hygiene, etc.
Several studies have also indicated that fluoride interferes with bacterial activity in the form of HF formed in the acidic conditions provided by the acidogenic bacteria, thus debilitating their activity [21, 26, 27].
Positively charged minerals impact alkalogenically; whereas, the negatively charged minerals have acidogenic effect on body fluids (Block, 1994).
This instability occurs in these liquid wastes when a small variation of the acidity produced by acidogenic bacteria results in a large variation in the pH value that leaves the favourable range for the balance of the microorganisms in the anaerobic digestion (RIBAS et al.
2) Acidogensis:--Carried out by acidogenic microbes, which convert soluble matter to fatty acids and alcohols.
Therefore, the prediction of the behavior of biomass and its relationship with the AD byproducts, mainly methane production, have caused the need to apply other kinetic models that also evaluate another important features as the duration of the lag phase, which is an important parameter in AD and is associated with the acidogenic and acetogenic stages (Aldin et al.
The whole process was characterized, controlling the pH in the acidogenic phase and following the chemical oxygen demand, besides the formation and composition of the biogas formed.
According to Aquino and Chernicharo (2005), the kinetic differences between acidogenic, methanogenic and ketogenic microorganisms cause an imbalance between production and consumption of intermediate products during organic load conditions.
Acids in the mouth originate from three main sources: produced in situ by acidogenic bacteria, ingested extrinsic acids as dietary components and dislocated intrinsic acids through the backflow of gastric contents.
Effect of chewing xylitol chewing gum on salivary flow rate and the acidogenic potential of dental plaque.
Frequent sugar intake leads to the selection of acidogenic and acid uric bacteria in the biofilm capable of promoting the de-mineralization of the dental enamel (23).