Association Between Gender, Age, and Skeletal Class With Mandibular Condyle Morphology: A Retrospective Study.

Objectives: This study aimed to examine the impact of demographic variables on mandibular condyle morphology, a critical factor in orthodontic treatment and maxillofacial surgery. The investigation focuses on the relationship between gender, age, and skeletal class with the morphological dimensions of the condyle, utilizing panoramic radiography as a diagnostic tool.

Methodology: A retrospective analysis was conducted on 150 panoramic radiographs from individuals stratified into six groups according to gender and skeletal class.

[Antimicrobial efficacy of orthodontic primer added with silver nanoparticles. Cross-sectional in vitro study].

The antimicrobial efficacy of the silver nanoparticles (NPsAg), incorporated into the adhesive (primer) placed in the enamel adjacent to fixed orthodontic appliances (brackets), was evaluated. An experimental study was performed on 40 premolars in vitro, which were divided into two groups with brackets, one cemented with conventional primer and another added with NPsAg, placed in culture media previously inoculated with Streptococcus mutans, and sampled for culturing and counting colony forming units (UFC) on days 1, 15 and 30. A decrease in the presence of Streptococcus mutans in the samples after 15 days with nanoparticle aggregation was observed, and a reduction in the effect of said nanoparticles after 30 days.

Lip projection analysis in brachycephalic, dolichocephalic and mesocephalic individuals of a Mexican population.

The aim of this study was to examine the lip projection of brachycephalic, dolichocephalic and mesocephalic Mexican patients and to analyze the relationship between dental protrusion and the lip position, to identify if a labial soft tissue projection exists and to determine what features predominated in this study. A total of 120 lateral radiographs of the skull were randomly selected from patients aged 16-25 years. The linear and angular data were measured, the values of the upper and lower lip projection relative to Ricketts E-line, Steiner S-line and Arnett TV-line were collected.

Amelogenin and enamelysin localization in human dental germs.

Odontogenesis is extensively studied in animal models but less understood in human. In early amelogenesis, amelogenin constitutes 90% of enamel organic matrix, which is degraded by enamelysin and replaced by hydroxyapatite crystals. Here, amelogenin and enamelysin distribution changes during amelogenesis were shown by co-localization experiments by confocal microscopy.

Enamel hypoplasia in children with renal disease in a fluoridated area.

The aim of this study was to compare the frequency of enamel hypoplasia in children with renal disease and healthy children, all of whom live in a fluoridated area. A cross-sectional study was made in 42 children divided into 2 groups. To describe enamel changes, 3 diagnostic criteria were applied: TSIF Index to describe dental fluorosis, Jackson-Al-Alousi Index to describe enamel hypoplasia, and Russell criteria to differentiate mild forms of dental fluorosis and enamel hypoplasia.