Search

Background: Malocclusion is one of the three major oral diseases, showing a high prevalence rate. There are differences in the alveolar height and inclination data of different countries and nationalities. There is no research on the height and inclination of molars and incisors of patients with Mongolian Angle Class Ⅱ skeletal malocclusion disease. Therefore, the purpose of the study is to observe the characteristics of the height and inclination of the incisor and molar of the Mongolian Angle class Ⅱ malocclusion. Methods: The program is a cross-sectional, case-control observational study, approved by the clinical research ethics committee of the hospital, and include Mongolian and non-Mongolian patients who meet the criteria in a 2:1 ratio. According to the comparison of the teeth data of patients with Mongolian Angle Class II malocclusion disease and non-Mongolian Angle Class II disease, we observe the characteristics of height and axial inclination of Mongolian Angle class Ⅱ malocclusion incisor and molar from the aspects of bone age and gender. Discussion: This study will analyze the relevant indicators of the molar and incisor height and inclination of the patient’s X-ray head positioning lateral radiograph, and obtain characteristics of the height and inclination of the incisor and molar of the Mongolian Class Ⅱ malocclusion.

Active faults with potential earthquake magnitude of 6–7 are often incorrectly identified as non-Holocene active faults by traditional geological methods because their co-seismic displacements were very small or even did not reach to surface, and are defined as minor-surface-rupture faults. Geological studies associated with the 2013 Lushan Ms 7.0 earthquake show that the Dachuan–Shuangshi fault (DSF) in the southern segment of the Longmenshan fault zone (LFZ) is a minor-surface-rupture fault. This study focuses on the microstructure and mineral composition of the fault gouge in the DSF using optical microscopy, a scanning electron microscope (SEM), and X-ray diffraction (XRD) methods; then, we compare our results with the previous achievements in the Beichuan–Yingxiu fault (BYF), a major seismogenic fault of the 2008 Wenchuan earthquake, in the middle–northern segment of the LFZ. The results show that the microscopic characteristics of the fault gouge of the DSF are obviously different from those of the BYF in the following aspects: 1) the thickness of the fault gouge produced by one fault event is less than 5 mm; 2) under the microscope, no obvious micro-cracks were examined in surrounding rocks around the fault gouge, and discontinuous micro-cracks and untypical S-C fabrics in the fault gouge were observed; 3) under the SEM, reworked fragments were rare in the fault gouge; 4) the XRD mineral analysis reveals that the total clay content is less than 50%, the content of kaolinite is obviously higher than that of clinochlore, and the content of illite/smectite mixed layer is less than 30%. A contrastive analysis reveals the differences between the microscopic features of the fault gouge of the DSF and the BYF, which are systematical. Therefore, the abovementioned microscopic characteristics identified from the fault gouge in the DSF may be used as auxiliary indicators to identify minor-surface-rupture faults.

Supplemental material, sj-doc-1-onc-10.1177_11795549221102752 for Use of Computed Tomography-Guided Percutaneous Biopsy of Invasive Non-Mucinous Lung Adenocarcinoma to Predict the Degree of Histological Differentiation by Dehao Liu, Lichun Chen, Xiaoping Wang, Yikai Lin and Jianwei Gu in Clinical Medicine Insights: Oncology