A Study on the Correlation of Big 5 Personality Traits in Asians With Facial Contour Surgery.

PURPOSE: The purpose of this study is to explore the present situation and related factors of big 5 personality in Asian patients with facial contour surgery and to provide experience for clinical individualized medical care. METHODS: Total 235 patients with facial contour surgery were selected in this study. The Neo Five-factor Inventory was used to investigate them. RESULTS: The scores of conscientiousness and openness in the Neo Five-factor Inventory were higher than others, whereas neuroticism score was lowest in patients with facial contour surgery. The scores of extroversion and agreeableness were in the middle level. Among the big 5 personality the age, educational background, self-rated personality, the only child in a family and other cosmetic surgery history had significant differences in patients. CONCLUSIONS: Patients with facial contour surgery for different sex, different marital status, different body mass index, there is no significant difference in the big 5 personality through this study. However, older patients had higher score for conscientiousness, patients with higher educational background had higher scores in openness and patients with introverted personality had higher neuroticism score. The authors should take individualized personality traits during perioperative care to help the patients to establish a correct and healthy esthetic concept, as well as postoperative body image concept, to build their self-confidence and social competitiveness.

Repair of tooth enamel by a biomimetic mineralization frontier ensuring epitaxial growth.

The regeneration of tooth enamel, the hardest biological tissue, remains a considerable challenge because its complicated and well-aligned apatite structure has not been duplicated artificially. We herein reveal that a rationally designed material composed of calcium phosphate ion clusters can be used to produce a precursor layer to induce the epitaxial crystal growth of enamel apatite, which mimics the biomineralization crystalline-amorphous frontier of hard tissue development in nature. After repair, the damaged enamel can be recovered completely because its hierarchical structure and mechanical properties are identical to those of natural enamel. The suggested phase transformation-based epitaxial growth follows a promising strategy for enamel regeneration and, more generally, for biomimetic reproduction of materials with complicated structure.

Red-blue light irradiation in the prevention of surgical wound infection after mandibular distraction using internal distractors in hemifacial microsomia: A randomized trial.

BACKGROUND: Postoperative infection is a complication of mandibular distraction osteogenesis (DO) in patients with hemifacial microsomia (HFM). The risk of surgical wound infection in DO is reported to be high due to the long duration of the distraction process. Treatment during the perioperative period is critical in combating infection. AIM: This study aimed to evaluate the effectiveness of red-blue irradiation in the prevention of surgical wound infection after mandibular distraction. METHODS: In our single-centered, randomized clinical study, 118 patients diagnosed with HFM who had undergone DO between April 2016 and April 2018 were included. The patients were randomly divided into two groups: the experimental group received red-blue irradiation treatment and the control group received white-light irradiation. RESULTS: None of the infections occurring in this study resulted in serious complications. The postoperative infection rate during the 4 weeks after DO in the experimental group was 1.7%, whereas that in the control group was 13.6% (p = 0.016) (based on a modified NHSN wound infection criterion). The total social cost during the active period for the experimental group was 3386840 RMB, 5.12% higher than for the control group (3221882 RMB). CONCLUSIONS: Red-blue irradiation is recommended as adjunctive therapy after mandibular distraction osteogeneis in HFM.

Simultaneous determination of fluoride, chloride, sulfate, phosphate, monofluorophosphate, glycerophosphate, sorbate, and saccharin in gargles by ion chromatography.

Simple, reliable and sensitive analytical methods to determine anticariogenic agents, preservatives, and artificial sweeteners contained in commercial gargles are necessary for evaluating their effectiveness, safety, and quality. An ion chromatography (IC) method has been described to analyze simultaneously eight anions including fluoride, chloride, sulfate, phosphate, monofluorophosphate, glycerophosphate (anticariogenic agents), sorbate (a preservative), and saccharin (an artificial sweetener) in gargles. In this IC system, we applied a mobile phased gradient elution with KOH, separation by IonPac AS18 columns, and suppressed conductivity detection. Optimized analytical conditions were further evaluated for accuracy. The relative standard deviations (RSDs) of the inter-day's retention time and peak area of all species were less than 0.938% and 8.731%, respectively, while RSDs of 5-day retention time and peak area were less than 1.265% and 8.934%, respectively. The correlation coefficients for targeted analytes ranged from 0.999 7 to 1.000 0. The spiked recoveries for the anions were 90% approximately 102.5%. We concluded that the method can be applied for comprehensive evaluation of commercial gargles.

Stabilization of an abutment under a rigidly fixed bridge by holographical-speckle interferometry.

OBJECTIVE: There are no detailed reports of three-dimensional measurement of abutment teeth in mastication, because it is knotty to observe the rotation in chewing directly, and inexact to estimate indirectly. This work studies the three-dimensional stability of rigidly fixed bridge under the stresses of distributed loads and concentrated loads by optical method that gives the tip angle and rotation angle calculated directly based on measurement data. METHODS: The specimen, taken from a 25-year-old male, was a left mandible without the second premolars and the first molars. As abutments, first premolar and second molar have complete periodontium. The specimen was soaked in formaldehyde solution. The bridge was fixed between two abutment teeth (first premolars and second molars), and the mandible was cemented in a steel box. The load was increased from 0 kg to 23 kg. Laser holographic technique was used to measure the three-dimensional bit shift of the dens, both buccolingual bit shift and mesiodistal bit shift, and determine tip angle and rotation angle. RESULTS: The effects of stress distribution on the rigidly fixed bridge were evaluated, and stabilization of the bridge under the stresses of distributed loads and concentrated loads, respectively, were analyzed. The results showed that the tips of two abutments were very similar, and no distinct difference was observed between the distributed load and the concentrated load. However, the maximum rotation angle for the distributed load was two to four times as large as that for the concentrated load. In the experiment, the tip angle of the abutment teeth was no more than 0.65 degree, and the rotation angle was no more than 0.60 degree. All maximum angles occurred in the second molar. CONCLUSION: The fixed bridge is considered to be safe. In addition, a method for measuring the rotation angle was provided effectively.