SalivaSaliva, ArtificialSalivary Proteins and PeptidesSalivationParotid GlandSalivary GlandsSubmandibular GlandMouthSublingual GlandImmunoglobulin A, SecretoryXerostomiaStreptococcus mutansDental PlaqueDental PellicleDental CariesHistatinsActinomycesMouth MucosaMucin-5BProline-Rich Protein DomainsSecretory Rate