The aim: To study the anatomic features of the facial skull structures in children of various ages depending on dentition Materials and methods: One hundred and forty-four children aged 2-12 years were divided into 4 groups depending on dentition. They underwent anthropometric measurements during adenoidectomy. Based on the cosine theorem, the calculated values were obtained. Results: The distance from choana to the free edge of the retracted soft palate gradually increases from 2.01±0.61 cm in children with stable primary dentition up to 3.09±1.02 cm with mixed dentition. Palato-nasopharyngeal angle in children with stable primary dentition is 126.25±8.76°, in children with aging primary dentition – 132.81±12.21°, and in children with mixed dentition – 120.54±13.72°. Conclusions: The optimal configuration of the blade for power-assisted adenoidectomy in children with stable primary dentition has an angle of 53.53±8.76°, and the length of the working part of 2.01±0.61 cm, in children with aging primary dentition – 47.18±12.21° and 2.10±0.71 cm, with mixed dentition – 59.45±13.72° and 3.09±1.02 cm, respectively.
The aim: To determine the effectiveness of the use of 3D printed templates of shaver blades for choosing the optimal blade shape for endoscopic surgery of the nasopharynx and paranasal sinuses. Materials and methods: The shaver blade templates with bending angles of 40º, 60º, 90º and 120° for powered endoscopic sinus surgery were made according to the manufacturer catalog using the Asiga 3D printer and Dental TOOTH material. There were examined 100 patients who underwent endoscopic powered sinus interventions (50 – adenoidectomy, and 50 – removal of the maxillary sinus cysts). The patients with each type of intervention were divided into subgroups of 25 people. The subgroups differed by the approach to choosing shaver blades: using 3D templates – in the main subgroup, and traditional –in the control. Results: The average number of shaver blades used for adenotomy in patients of the main group was 1.04±0.04, and in the control group – 1.36±0.09 (p<0.05). In patients of both subgroups, the 40º shaver blade, which is standard for adenotomy and recommended by most manufacturers, was most often used. In the control subgroup, it was used significantly more often. The frequency of the use of other shaver blades – 60º and 90º in both subgroups did not differ significantly and amounted to 40.0% (CI 95% 21.8; 61.1) and 36.0% (CI 95% 18.7; 57.4). Conclusions: The use of 3D templates for choosing a shaver blade reduces the number of blades used in adenoidectomy by 23.5%, for maxillary sinus cysts operation – by 18.2%.
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