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	1. Measurement and correlation analysis of upper airway and mandible, hyoid in patients with bilateral anterior disc displacement
	Hou Yijun,Pan Xiaojing
	Clinical Medicine 23 March 2022
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	Abstract:Objective: To evaluate the presence of upper airway stenosis in patients with bilateral anterior disc displacement, and to further demonstrate the relationship between temporomandibular joint, airway, and hyoid bone. Methods: 64 patients with bilateral anterior disc displacement shown by CBCT in the joint specialty of Stomatological Hospital of Lanzhou University from June 2020 to August 2021 were selected as the patient group, 65 patients with normal joints diagnosed by arthrologists were selected as the control group. The included patients were 18-44 years old, with normal BMI index and skeletal class I. The number of patients with high angle and low angle in the experimental group was the same as that in the control group. First, Dolphin11.8 was used to measure joint space, airway volume, and cross-sectional area. It also reconstructed lateral cranial radiographs were used to measure the parameters of the mandibular and hyoid bone. last, we analyzed the correlation. Results: There was no difference in segmentation parameters among all patients. In patients with bilateral anterior disc displacement, the airway is narrow, the mandible retracts, and the hyoid bone is lower and more posterior. The linear ratio of condylar sagittal position （LR） was correlated with the airway volume of palatopharynx and glossopharynx, and with the length of the mandibular body and the sagittal position of mandible. Conclusions: Patients with bilateral anterior disc displacement and patients with OSAHS show similar changes in the position of mandible and hyoid bone. When meeting patients with joint problems, stomatologists should pay attention to asking them whether they have problems with airway obstruction.
	TO cite this article:Hou Yijun,Pan Xiaojing. Measurement and correlation analysis of upper airway and mandible, hyoid in patients with bilateral anterior disc displacement[OL].[23 March 2022] http://en.paper.edu.cn/en_releasepaper/content/4757016


	2. Comparative study of the treatment effects with FR III and Sander III appliances in children with Class III malocclusion
	ZHAO Wei,AN Xiaoli
	Clinical Medicine 02 May 2019
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	Abstract:Purpose: To evaluate and compare the skeletal and facial changes of children with mild skeletal Class III malocclusion following the treatment of the Function Regulator III appliance and the Sander III appliance. Materials and methods: The study sample consisted of 40 children presenting skeletal Class III malocclusion. The group of patients treated with the Function Regulator III appliances (FR-III) consisted of 20 subjects with a mean age of 7.615±0.9996 years. The group of patients treated with the Sander III appliances (SD-III) consisted of 20 subjects with a mean age of 7.68±1.0665 years. Lateral cephalograms were obtained immediately before initiation and after completion of the treatment. Twenty-one variables were used for the analysis of skeletal and lateral profile changes. The non-parametric test was utilized to evaluate the presence of significant changes (P < 0.05). Results: Cephalometric analysis showed that the ANB angle increased by 4.05o in the SD-III group, compared with 1.46o in the FR-III group (p < 0.0001). There was 1.93o and 5.75o increase in GoGn-SN and FMA respectively in SD-III group, and the trends in FR-III group were similar, but there was no statistical difference between the two groups(p＞0.05). Conclusion: SD-III is suitable for the maxillary deficiency of skeletal Class III malocclusion with low or average mandibular plane angle, rather than the high angle patients with apparent mandibular overgrowth. FR-III is suitable for the functional crossbite with low or average angle and the patients of mild skeletal Class III malocclusion with normal upper and lower jaws.
	TO cite this article:ZHAO Wei,AN Xiaoli. Comparative study of the treatment effects with FR III and Sander III appliances in children with Class III malocclusion[OL].[ 2 May 2019] http://en.paper.edu.cn/en_releasepaper/content/4748845

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