Investigation of caries prevalence in children with cleft lip, alveolus, and palate.

Aim: The purpose of this study was to assess the prevalence of dental caries in children with orofacial clefts.

Patients: A total of 623 children aged 6-16 years with cleft lip, alveolus, and palate were included in the study. They were compared with 47,646 schoolchildren from Leipzig (Germany).

The alkaline phosphatase from bone: transphosphorylating activity and kinetic mechanism.

For the purified alkaline phosphatase from bone, the ability to catalyze a phosphate transfer reaction from p-nitrophenyl phosphate to two different hydroxy acceptor compounds, ethanolamine and glycerol, was established by identification of the formed phosphorylated products, phosphoethanolamine and glycerol 3-phosphate, respectively. In addition, a steady-state kinetic analysis of the hydrolysis of p-nitrophenyl phosphate in the presence of an added nucleophile, diethanolamine, gave rise to the proposal of a simple model for the kinetic mechanism of the enzyme. This mechanism includes a covalent phosphoryl enzyme intermediate, the dephosphorylation of which by water (k3) or a nucleophile (k4) is rate-determining.

[Fluoride deposition in the dental enamel following the use of a fluoride-containing gel studied by a nuclear physics method (PIGE)].

The caries-preventing activity of fluorine is a surfact in the medicine. Dentists and physicists analysed with a new nuclear physical method the fluorine uptake of the tooth enamel after application of new caries-preventive agents. The fluorine profile of the first 3 microns of the enamel surface from deciduous teeth was established after three years clinical treatment with two new developed fluorine gels from the VEB Leipziger Arzneimittelwerk in comparison with Elmexgelee and a control agent.