Objective This study aims to establish an approach to integrate autonomous maximal smile(AMS)3D facial image with digital 3D dental models to demonstrate the digital orthodontic set-up in the 3D facial context.Methods Using Geomagic Studio software,the AMS 3D facial image and pre-treatment dental model were manually and globally registered.Subsequently,the pre-treatment dental model was substituted with the predicted post-treatment dental model.The intraoral region of the AMS 3D facial image was removed,achieving a conjunctive display of the AMS 3D facial image and the post-treatment dental set-up.The distances between four groups of corresponding landmark pairs on the AMS 3D facial image and the pre-treatment dental set-up were calculated,and the accuracy of the registration operation was evaluated by paired t-test.Results The novel approach effectively facilitated the integration of AMS 3D facial images with the pre-treatment and predicted post-treatment 3D dental models.The average distances between the pairs of points were(1.19±0.55)mm and(1.55±0.59)mm for the two registrations,respectively.Notably,no statistically significant difference was observed be-tween the two measurements(P>0.05),indicating a high agreement(intraclass correlation coefficient=0.914).Conclu-sion This study established an approach to integrate AMS 3D facial images with digital 3D dental models.Through this approach,the digital orthodontic set-up design can be displayed in the context of a 3D facial image,which may help to improve the quality of outcome set-up in digital orthodontics,such as clear aligner therapy.

Objective:To investigate the clinical and radiological outcomes of ultrasound guided injection of platelet-rich plasma (PRP) in the treatment of intratendinous rotator cuff tear.Methods:A retrospective study was conducted to analyze the clinical data of 43 patients (46 shoulders) who had been treated for intratendinous partial-thickness rotator cuff tear by ultrasound guided injection of PRP consecutively from July 2021 to March 2022 at Department of Sports Medicine, Peking University Third Hospital. There were 23 males and 20 females, with an age of (47.8±13.5) years and a course of disease of 6 (4, 18) months, involving 22 left shoulders and 24 right shoulders. The visual analog scale (VAS) pain score, the University of California at Los Angeles (UCLA) rating scale, and the shoulder index of the American Shoulder and Elbow Surgeons (ASES) were determined before injection and at the last follow-up. The changes in tear size were also evaluated by magnetic resonance imaging (MRI) before PRP injection and 3 to 5 months after PRP injection.Results:The 43 patients were followed up for 15 (12, 17) months after treatment. Of this cohort, 7 shoulders (15.2%, 7/46) were recovered to complete normal and very satisfied with the injection effects while 19 shoulders(41.3%, 19/46) satisfied with the effects after injection, yielding an overall satisfaction rate of 56.5% (26/46). At the last follow-up, the VAS score [3.0 (2.0, 4.0) points], ASES score [80.0 (65.0, 88.8) points], and UCLA score [29.0 (20.0, 32.0) points] were significantly improved compared with those before injection [5.5 (4.0, 8.0) points, 55.0 (39.2, 65.0) points, and 16.0 (12.0, 20.3) points] ( P < 0.05). MRI evaluation showed the tear volume was significantly reduced after PRP injection [46.1 (20.9, 77.5) mm 3 before injection versus 28.2 (12.5, 63.6) mm 3 after injection] ( P<0.05), and a >50% tear volume diminution was observed in 13 shoulders (34.2%,13/38). There were no complications during or after injection. Conclusion:As the ultrasound guided injection of PRP into intratendinous lesions is effective and safe for patients with intratendinous partial-thickness rotator cuff tear, it can be an alternative treatment for the patients or professional athletes who are unwilling to undergo surgery.

Objective: To construct and identify a mouse model with conditional knockout (cKO) of p75 neurotrophin receptor (p75NTR-cKO) gene in epidermis cells by Cre-loxP system. Methods: Five p75NTR^flox/flox transgenic C57BL/6J mice (aged 6-8 weeks, male and female unlimited, the age and sex of mice used for reproduction were the same below) and five keratin 14 promotor-driven (KRT14-) Cre^{+ /-} transgenic C57BL/6J mice were bred and hybridized via Cre-loxP system. Five p75NTR^flox/+ ·KRT14-Cre^{+ /-} mice selected from the first generation of mice were mated with five p75NTR^flox/flox mice to obtain the second generation hybrids. After the second generation mice were born 20-25 days, the parts of the mice tail were cut off to identify the genotype by polymerase chain reaction method. Four p75NTR gene complete cKO mice (6 weeks old) and 4 wild-type mice (6 weeks old) were selected and sacrificed respectively. The abdominal skin tissue and brain tissue were excised to observe the expression of p75NTR in the two tissue of two types of mice by immunohistochemical staining. The abdominal skin tissue of two types of mice was obtained to observe the histomorphological changes by hematoxylin and eosin staining. Results: (1) Twenty second generation mice were bred. The genotype of 4 mice was p75NTR^flox/flox·KRT14-Cre^{+ /-}(p75NTR^-/-), i. e. p75NTR gene complete cKO mice; the genotype of 5 mice was p75NTR^flox/+ ·KRT14-Cre^{+ /-}, i. e. p75NTR gene partial cKO mice; the genotype of 5 mice was p75NTR^flox/flox·KRT14-Cre^-/-, and that of 6 mice was p75NTR^flox/+ ·KRT14-Cre^-/-, all of which were wild-type mice. (2) The expression of p75NTR was negative in skin epidermis tissue of p75NTR gene complete cKO mice, while numerous p75NTR positive expression was observed in skin epidermis tissue of wild-type mice. Abundant p75NTR positive expression was observed in brain tissue of both wild-type mice and p75NTR gene complete cKO mice. (3) There was no abnormal growth of skin epidermis tissue in both wild-type mice and p75NTR gene complete cKO mice, with intact hair follicle structure. Conclusions Applying Cre-loxP system can successfully construct a p75NTR-cKO mice model in epidermis cells without obvious changes in skin histomorphology.

Objective To study the qualitative and quantitative standard of Shengui anti-pruritic mixture. Mehtods Sophorae Flavescentis Radix, Cnidii Fructus, Polygoni Multiflori Radix, Astragali Radix, Paeoniae Radix Alba and Glycyrrhizae Radix Et Rhizoma were identified by TLC.The contents of matrine and ferulic acid were determined by HPLC. Results The TLC showed the obvious characteristics with the spots clear and well-separated with no interference by negative control. Matrine showed a good linear relationship at 0.062 5- 2.500 0 μg (r=0.999 9) with a good meeting of adding sample recovery test. Ferulic acid showed a good linear relationship at 0.021 0-0.840 0 μg (r=0.999 9) with a good meeting of adding sample recovery test. Conclusions The method is easy-operated and accurate which showed a good specificity for the quality control of Shengui anti-pruritic mixture.

The implant prosthesis has been extensively used in clinic recently, and implant failure is appearing. Many factors may cause the failure, and they work together generally. This paper summarizes and analyzes the failure cases related to implant treatment and relevant risk factors of oral implants in Department of Implantation, School of Stomatology, The Fourth Military Medical University during the past six years, in order to improve the success rate of implant prosthesis and provide guidance for clinical application.

Objective To design and develop an air purification system for intensive care ambulances,which can effectively purify the air in the compartment and sterilize the microbes in the air.Methods By integrating titanium dioxide photocatalysts with air filtration materials,an air purification system was designed that was capable of effective sterilization of microbes in the air via photocatalytic oxidation and decomposition,and of effective filtration of particles in the air through HEPA filters.The protection effect was evaluated by air filtration and sterilization tests in accordance with the related national standards.Results The air cleanliness could reach the 100 000 level with bacteria counts no more than 1 CFU per pan for 15 minutes in the ambulance compartment when the air purification system worked normally,which could meet the demands of environmental hygienic standards for intensive care units.Conclusion The air purification system can effectively purify and sterilize the air in the compartment of an intensive care ambulance.The effects of air purification meet the requirements of related hygienic standards,which can satisfy the demands of treatment and intensive care for the victims in the ambulance.

Objective To develop an intelligent system which is able to offer an optimized emergency treatment recommendation for fast triage automatically.Methods An algorithm and intelligent platform for grading injury were developed based on physiological signal collecting technology, intelligent grading algorithm and integration technology.A comparison between this system and traditional methods was made.Results This intelligent system was able to increase accuracy by 21%and took only 48%of the time taken by traditional methods.There was significant difference between the two groups(P=0.038<0.05).Conclusion The accuracy of the triage is improved by this intelligent system that is less time-consuming.With this device, the injury statement can be identified quickly and the targeted medical treatment can be performed accurately.The efficiency of emergency treatment in case of disaster will thus be dramatically increased.

Objective To solve problems existing in multichannel digital temperature detecting system,including boring wiring,unreliable data storage,poor anti-jamming.Methods Dynamic address code design and automatic compositor algorithms were integrated into the software design,while the running out was eliminated by adopting watch dog chip.Results The validity of the improvement were proved by high & low temperature tests.Conclusion The improved system,with convenient wiring,reliable data storage,accurate results and short response time,can be applied to fully digital & unattended temperature detection.

This paper introduces a small and light one-handed electronic tourniquet which adds the function of electronic timing and alarming to the traditional locked tourniquet. The tourniquet has an effect on first aid hemostasis from extremity wound in emergency.

Objective To design an integrated emergency medical treatment system mounted on helicopter, which can meet the requirements of field treatment and evacuation in emergency disasters or local wars, the system has immobile form and mobile form. Methods With the characteristics of existing helicopter considered, the components of the system were supposed to include a universal stretchers, overall structure and embedded emergency devices and support transport accessories. Results The system could realize the destination of swift response and air-and ground first-aid, the new model of swift response can made the regulation and principle of first -aid more reasonable, and increases the survival rate significantly. Conclusion Critical diseases have become the latest killer in daily life. The first-aid on spot need the new model of swift response and air -and ground first -aid, the system can decrease the invalidity and mortality.