Class III malocclusion remains one of the most challenging malocclusions for diagnosis and treatment planning. For early recognition of Class III malocclusion an accurate diagnosis of face and hard tissues is required already in deciduous or early mixed dentiton. Studies involving irradiation of children are ethically questionable. We evaluated and identified morphological characteristics of Class III children in deciduous and early mixed dentition using a non-invasive 3D laser surface scanning method, for more effective, improved, non-invasive diagnosis and enhanced treatment planning. A 3D laser imaging method could in the future become an important diagnostic tool in small children. The most important clinical advantage of this study is the non-invasiveness of the diagnostic method using 3D laser imaging device.
D.09 Tutoring for postgraduate students
COBISS.SI-ID: 30250713Treatment of unilateral posterior cross-bite in the primary dentition period is still controversial in resperct of cost-effectivness and psihosocial benefit. The aim of this longitudinal study was to assess whether correction of unilateral posterior cross-bite in the primary dentition results in improvement of facial symmetry and increase of palatal surface area and palatal volume. The childrenćs faces and dental casts were scanned using a three-dimensional laser scanning device. Treatment of unilateral posterior cross-bite in the primary dentition improves facial symmetry and increases the palatal surface area and the palatal volume, though it creates normal conditions for normal growth and development of the orofacial system.
D.09 Tutoring for postgraduate students
COBISS.SI-ID: 28947161The study showed that the growth of the maxilla after nasoalveolar molding and gingivoperiosteoplasty until the age of six is the same as after conventional surgery and clasic mucoperiostal closure of a lip cleft. The aesthetics of nose is significantly better after the modified nasoalveolar molding and the nose retains its shape. Intercanine dental crossbite is significatly more frequent in the first group. If a retardation in the skeletal sagital growth is found later in the study, we will probably discontinue using the modifiend method.
F.22 Improvement to existing health/diagnostic methods/procedures
COBISS.SI-ID: 27330521Introduction Incorrect tongue posture on the mouth floor is considered an important factor in the etiology of unilateral posterior crossbite. The aim ofthis study was to objectively assess tongue posture in children with unilateral posterior crossbite and those with normal deciduous dentition by using 3-dimensional (3D) ultrasonography. Methods First, referential 3D ultrasound images for differently postured tongues were acquired and reconstructed in 10 adults. Second, 27 children with unilateral posterior crossbite (mean age, 5.4 1 years) and 23 children with normal deciduous dentition (mean age, 6.2 0.4 years) were examined by using the 3D ultrasoundtechnique. The referential 3D ultrasound reconstructions were used for the assessment of tongue posture in each child. Results The characteristic3D reconstruction of the tongue postured on the palate displays distinctive convexity of the tongue dorsum, whereas, in the 3D reconstruction with the tongue postured on the mouth floor, the dorsum is characterized by a central groove and expressed concavity. Posture on the mouth floor was demonstrated by 81.5% of the children with unilateral posterior crossbite and by only 34.8% of those with normal deciduous dentition. The difference was statistically significant (Fisher exact test: P = 0.0012). Conclusions Three-dimensional ultrasonography enables objective assessment of tongue posture and could become in the future an important part of functional diagnostics before, during, and after orthodontic treatment.
F.17 Transfer of existing technologies, know-how, methods and procedures into practice
COBISS.SI-ID: 27607001Orientation in space is of cardinal importance in surgery. In presurgical preparation surgeons make use of various virtual 3-d simulations, and since the beginning of 1990’s physical 3-d models made by a rapid prototyping technique have been employed. At the Clinical Department of Oral and Maxillofacial Surgery of the University Medical Centre in Ljubljana 120 virtual and 45 physical models have been made, for the most demanding traumatological and oncological reconstructions. In this article, two cases of their usage are introduced.
F.17 Transfer of existing technologies, know-how, methods and procedures into practice
COBISS.SI-ID: 26919385