A method, based on non-invasive three-dimensional surface back scans has been developed for objective evaluation of back asymmetry. The method is based on the placement of several reference points (neck point, the most prominent points of the shoulders, scapulae and hips), which are used to divide the back into three regions, of which asymmetry is assessed on a colour deviation map. A colour deviation map represents the differences between the left and right side of the back of each region and is obtained by superimposition of the original and mirrored back scan using the best-fit method. The greatest asymmetry was detected at the scapula prominence. The three-dimensional assessment of back surface is objective since reference point placement is repeatable.
COBISS.SI-ID: 33664473
In a subject with unilateral functional crossbite, clinical assessment of orthopaedic anomalies was performed. Furthermore, a three-dimensional scan of the subject's face was obtained using a non-invasive method. The scan was then flipped horizontally to obtain a mirrored facial scans and colour deviation maps were used to assess the degree of facial asymmetry at a tolerance level of 0.5 mm. The facial asymmetry was present mainly in the lower part of the face, which was probably a result of the lateral mandibular shift. Moreover, the clinical assessment evidenced several orthopaedic anomalies, including shoulder, scapulae and hip height inequalities. Although further research is needed, we assume that there is a correlation between facial asymmetry and orthopaedic anomalies.
COBISS.SI-ID: 33665241
Since unilateral crossbite occurs frequently in cleft patients, the aim of the study was to assess arch width, palatal surface area, and volume in surgically treated unilateral cleft lip and palate (UCLP) in mixed dentition children in comparison with non-cleft lip and palate (NCLP) children using a 3D laser scanning. 38 subjects (Caucasian origin), 5.63-11.9 years of age (mean, 9.33 ± 1.67 years), were included. 19 in each group (UCLP and NCLP). Digital dental casts were obtained using a 3 Shape R700 laser scanner. Intercanine and intermolar widths (cusp and gingival levels), palatal surface area and volume were measured. Intercanine widths at the cusp (5.60 mm; P ( 0.001) and at the gingival level (3.11 mm; P = 0.014), palatal area (141.5 mm2; P = 0.009) and volume (890.7 mm3; P = 0.029) were significantly lower in the UCLP compared to the control group. Three-dimensional evaluation of the maxillary arch and palate highlighted significant differences between UCLP and NUCLP subjects in mixed dentition phase, suggesting that orthopaedic maxillary expansion is advisable in UCLP.
COBISS.SI-ID: 33205465