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A case of congenital micrognathia and microglossia was observed between the ages of 6.5 and 8 years in a boy patient. The lower arch was extremely narrow and the tongue was extremely thin, small, and smooth. Speech disorder, absence of 13, 23, 32, 42, and severe overbite occlusion accompanied that case. The etiology in connection with the growth and development, the insertion of upper and lower prosthesis were discussed in this paper.

Maxillary central diastema in a child with deciduous or mixed dentition is common and normal, owing to the growth and development of the anterior segment of the upper jaw. However, if the central diastema persists after the permanent cuspids have erupted, the dentist, the dentist should clarify its aetiology and establish a conforming treatment. This report discusses a case in a 13 years old girl, in the beginning of permanent teeth period, with a central diastema due to a high attachment of the maxillary labial frenum. Cross bite anterior and midline shifting were also found in this patient. The treatment was frenectomy followed by orthodontic treatment. The closure of the diastema took place after one month of treatment. The orthodontic treatment has been continued to achieve the correct occlusion.

The purpose of this study was to determine the fluoride content differences in enamel of immature teeth with Glass Ionomer Cement Fuji IX and Ketac Molar filling.The subject for this study was 21 immature premolars teeth, and each tooth divided into 2 parts. The first part filled with Fuji IX (Fuji IX ART, GC) and the second part filled with Ketac Molar (KetacMolar ART, MI, 3M ESPE), so the samples were 21 Energy Dispersive X-Ray Spectrophotometry analysis of Fuji IX and 21 Energy Dispersive X-Ray Spectrophotometry analysis of Ketac molar. The measurement was done to the fluoride content in enamel of immature teeth using Energy Dispersive X-Ray Spectrophotometry in percentage.This study using t-test, exhibited differences but no significant from the percentage of delta the fluoride content in enamel of immature teeth with Fuji IX and Ketac Molar filling (t=1,953 p > 0.05).DOI: 10.14693/jdi.v15i2.74

Phosphoric acid etching has been widely used to achieve a strong and long lasting mechanical bonding between composite resin restoration and tooth structure. The aim of this study was to evaluate the bond strength between the enamel of permanent teeth and the composite resin restoration by measuring the shear bond strength after different durations of etching. In total 27 premolar teeth were divided into 3 groups where the enamel of the buccal surface was etched with 37% phosphoric acid for 5″, 15″, and 25″ before placing the composite resin restoration. After keeping the teeth inside an incubator for 24 hours, the shear bond strength was measured using a universal testing machine Shimazu AG-5000 at a crosshead speed of 0.5 mm/min. ANOVA was used for statistical analysis of the results, with p0.05). Conclusion: Shear bond strength of the composite resin on the permanent teeth enamel increased with increasing etching time. Significant difference was showed between 5″ and 25″ of etching time.DOI: 10.14693/jdi.v15i2.65