The Analysis Of Dental And Basal Bone Arch Form Matching In Skeletal Class ? Malocclusion

ObjectiveIn this study, select skeletal Class? malocclusion as research subjects, by measuring the oral maxillofacial CBCT images of skeletal Class?malocclusion, to establish skeletal Class?malocclusion dental arch and basal bone arch mathematical models. And through the matching study of dental arch and basal bone arch mathematical models to examine skeletal class ? malocclusion compensatory mechanisms and coordination arch and base bone bow, provide the basis for clinical diagnosis and treatment. MethodsIn accordance with the inclusion criteria, select skeletal class ?35 patients?20 females, 22.87 ± 5.48 years: 15 male Example, 23.45 ± 7.28 years? as the experimental group, 30 patients with individual normal he?18 females, 25.80 ± 3.14; 12 males, 24.32 ± 2.56? as a control group,in September 2010 to September 2015 in Tianjin Stomatological Hospital orthodontic patients and captured images by CBCT. Convert data through Mimics 10.0 software, and the landmark arch and base bone bow marking points are marked to import data points to Matlab 7.0 software, projected working plane operation and signs point to calculate and fangs Second molars arch landmark basal bone bow marking points in the horizontal and vertical distances work plane projection point, and then use Beta-function to establish skeletal Class?malocclusion dental arch and basal bone arch mathematical models.. Data using SPSS 11.0 statistical software statistical analysis, verification Beta-function for skeletal Class?malocclusion arch, bow degree fitting base bone shape, and then match analysis of dental arch and base bone bow. Results1.Establish skeletal Class ? malocclusion dental arch form of the mathematical modelMaxillary: Y=46.12 [ 1-?2X/70.99?² ]^1.052Mandibular:Y=39.16[ 1-?2X/64.51?² ]^1.038Establish skeletal Class ? malocclusion basal bone arch form of the mathematical modelMaxillary: Y=43.14 [ 1-?2X/75.09?² ]^1.061Mandibular: Y=39.03[ 1-?2X/60.63?² ]^1.0212. Skeletal class ?mandibular dental arch and basal bone arch, between the width and depth in canine area,width and depth of the second molar highly correlated r> 0.80, and the dental arch and basal bone bow curve fit higher.3. Maxillary Fa points are located on the labial side Ba point, the distance is positive; mandibular Fa points are located on the lingual Ba point, the distance is negative. Consistent with clinical observations.4. Maxillary dental arch,basal bone arch of skeletal Class ?occlusionarch compared to individual ordinary occlusion, having a width and length tends to be smaller; mandibular dental arch and basal bone arch exists excessive development. Its shape affected by the width and depth of canine area and the second molar. Conclusion1.Maxillary dental arch and basal bone,mandibular dental arch and basal bone arch are personalized form curve, its shape of the curve varies according to changes e.2. Skeletal Class?malocclusion patients have uncoordinated in sagittal and transverse,uncoordinated reason can be found by mathematical model dental arch and base bone bow, to guide the development of the clinical treatment plan.