Higginsmcallister7453
To analyze the morphological changes in the upper airway of obstructive sleep apnea syndrome (OSAS) patients treated with oral appliance in skeletal class Ⅱ malocclusion with different vertical features by using cone beam CT (CBCT).
Thirty-six patients diagnosed with OSAS by polysomnography and daytime sleepiness scale and skeletal class Ⅱ malocclusion were treated with oral appliance for 4 months. The changes based on CBCT in the morphology of glossopharyngeal and palatopharyngeal before and after treatment in OSAS patients with different vertical features were compared.
After treatment with oral appliance, the glossopharyngeal and palatopharyngeal morphologies of patients with mild OSAS showed significant changes. After treatment with oral appliance, the glossopharyngeal morphology of all patients showed significant changes (P<0.05). The palatopharyngeal morphology of patients in the lower and average groups also exhibited significant changes (P<0.05). Sagittal changes in the glossopharyngeal measurements of high-angle patients demonstrated significant difference, whereas the other measured values showed no significant difference.
The morphological changes in the upper airway were significant in OSAS patients with lower and average vertical patterns when treated with oral appliance, but the changes in high vertical patterns were not significant.
The morphological changes in the upper airway were significant in OSAS patients with lower and average vertical patterns when treated with oral appliance, but the changes in high vertical patterns were not significant.
The effects of different tube currents and voltages on image quality and radiation dose were studied to provide a theoretical basis for low-dose cone beam computed tomography (CBCT) scanning in children.
Different tube currents and voltages were used to scan the incisor area of fresh Bama pig heads by CBCT. The radiation dose was recorded, and image quality was evaluated.
As the tube current or voltage decreased, the radiation dose and image quality gradually decreased. The computed tomographic dose index (CTDIvol) of 90 kV, 2.5 mA and 60 kV, 7.0 mA were all 1.7 mGy. The image quality score of the former was higher than that of the latter, and the difference between them was statistically significant (P<0.05).
Low-dose CBCT scanning appears to be able to reduce the necessary tube current during imaging by improving image quality.
Low-dose CBCT scanning appears to be able to reduce the necessary tube current during imaging by improving image quality.
To understand the current cognition of acquired immunodeficiency syndrome (AIDS) occupational protection among the managers of multi-level stomatology medical institutions in efforts to provide a reference for formulating technical standards for occupational protection.
Eighteen managers of oral medical institutions were individually interviewed in-depth using asemi-structured questionnaire on issues related to AIDS occupational protection using the phenomenological research method. TVB-2640 chemical structure Nvivo 12.0 software was used to code and analyze the interview data, and relevant themes were extracted.
Three themes were extracted from the data. Occupational protection measures for AIDS in dental medical institutions mainly based on the aspects of standardized operation, standardized prevention, and post-exposure treatment. However, the implementation of these protective measures was often inadequate. Occupational protection training for AIDS was carried out regularly at dental medical institutions, but the training effect was not generally tracked. Several limitations in AIDS occupational protection management; these limitations included the lack of a specific occupational protection system, the difficulty of AIDS screening for outpatients, and the difficulty of AIDS occupational protection supervision.
Oral medical institutions should strengthen their occupational protection training and supervision approaches and formulate unified occupational protection standards to reduce occupational exposure and improve hospital management quality and efficiency.
Oral medical institutions should strengthen their occupational protection training and supervision approaches and formulate unified occupational protection standards to reduce occupational exposure and improve hospital management quality and efficiency.
To observe the changes of forward displacement of maxillary complete denture during centric occlusion, three different methods were used to record the changes of vertical overlap and the comfort level of patients before and after the selective grinding of the three dentures made according to maxillo-mandibular horizontal relationship record.
Twelve edentulous patients with normal stomatognathic system were recruited in this study. Three types of complete dentures for these 12 edentulous patients were made according to their different maxilla-mandibular horizontal relationship record methods. The amount of displacement of the maxillary complete denture, the vertical overlap of the anterior teeth as well as patient comfort level were recorded before and after selective grinding. Statistical analysis was performed using the SPSS 17.0 software package.
Before selective grinding, the amount of displacement of denture A was significantly larger than those of dentures B and C (P<0.05). After selective grindx of the Gothic arch apex and with checkbite are more in line with clinical repair requirements. Complete dentures whose horizontal relationship was recorded at the apex of Gothic arch need to be adjusted with selective grinding to meet the clinical restoration requirements.
To explore the correlation among gingival thickness (GT), underlying alveolar bone thickness (BT), and other periodontal biotype characteristics in the maxillary anterior.
A total of 40 young volunteers with healthy periodontal were involved in this research. The periodontal probe was previously used to divide the gingiva from thick to thin. Two records were measured by cone beam CT (CBCT) GT, which was measured at the cement-enamel junction level; and BT, which was measured at 3 locations 1, 3, 5 mm below the alveolar crest. Oral and gypsum measurements were used to analyze the associations of the crown width/crown length ratio (CW/CL), the keratinized mucosa width (KM), and the free gingival margin curvature.
Significant difference in the GT was observed between the thick and thin biotypes, which were divided by periodontal probe (P<0.01). Difference was observed in each periodontal biotype characteristic between the thick (GT≥1 mm) and thin biotypes (GT<1 mm) (P<0.05). BT was positively associated with GT (r=0.
