Heart failure (HF) is the end-stage of all cardiac diseases, characterized by high prevalence, high mortality, and heavy social and economic burden. Early warning of HF exacerbation is of great value for outpatient management and reducing readmission rates. Currently, remote dynamic monitoring technology, which captures changes in hemodynamic and physiological parameters of HF patients, has become the primary method for early warning and is a hot research topic in clinical studies. This paper systematically reviews the progress in this field, which was categorized into invasive monitoring based on implanted devices, non-invasive monitoring based on wearable devices, and other monitoring technologies based on audio and video. Invasive monitoring primarily involves direct hemodynamic parameters such as left atrial pressure and pulmonary artery pressure, while non-invasive monitoring covers parameters such as thoracic impedance, electrocardiogram, respiration, and activity levels. These parameters exhibit characteristic changes in the early stages of HF exacerbation. Given the clinical heterogeneity of HF patients, multi-source information fusion analysis can significantly improve the prediction accuracy of early warning models. The results of this study suggest that, compared with invasive monitoring, non-invasive monitoring technology, with its advantages of good patient compliance, ease of operation, and cost-effectiveness, combined with AI-driven multimodal data analysis methods, shows significant clinical application potential in establishing an outpatient management system for HF.
Humans ; Heart Failure/physiopathology* ; Monitoring, Physiologic/methods* ; Wearable Electronic Devices ; Remote Sensing Technology ; Early Diagnosis ; Electrocardiography ; Hemodynamics

Pulpitis is a common infective oral disease in clinical situations. The regulatory mechanisms of immune defense in pulpitis are still being investigated. Osteomodulin (OMD) is a small leucine-rich proteoglycan family member distributed in bones and teeth. It is a bioactive protein that promotes osteogenesis and suppresses the apoptosis of human dental pulp stem cells (hDPSCs). In this study, the role of OMD in pulpitis and the OMD-induced regulatory mechanism were investigated. The OMD expression in normal and inflamed human pulp tissues was detected via immunofluorescence staining. Intriguingly, the OMD expression decreased in the inflammatory infiltration area of pulpitis specimens. The cellular experiments demonstrated that recombined human OMD could resist the detrimental effects of lipopolysaccharide (LPS)-induced inflammation. A conditional Omd knockout mouse model with pulpal inflammation was established. LPS-induced inflammatory impairment significantly increased in conditional Omd knockout mice, whereas OMD administration exhibited a protective effect against pulpitis. Mechanistically, the transcriptome alterations of OMD overexpression showed significant enrichment in the nuclear factor-κB (NF-κB) signaling pathway. Interleukin-1 receptor 1 (IL1R1), a vital membrane receptor activating the NF-κB pathway, was significantly downregulated in OMD-overexpressing hDPSCs. Additionally, the interaction between OMD and IL1R1 was verified using co-immunoprecipitation and molecular docking. In vivo, excessive pulpal inflammation in Omd-deficient mice was rescued using an IL1R antagonist. Overall, OMD played a protective role in the inflammatory response via the IL1R1/NF-κB signaling pathway. OMD may optimize the immunomodulatory functions of hDPSCs and can be used for regenerative endodontics.
Pulpitis/metabolism* ; NF-kappa B/metabolism* ; Animals ; Signal Transduction ; Humans ; Mice ; Mice, Knockout ; Dental Pulp/metabolism* ; Disease Models, Animal ; Lipopolysaccharides

Tooth pulpitis is a prevalent oral disorder. Understanding the underlying mechanisms of pulpitis and developing effective treatment strategies hold great significance. Ferroptosis has recently emerged as a new form of cell death, but the role of ferroptosis in pulpitis remains largely unknown. In our study, single-cell RNA sequencing (scRNA-seq) was used to identify cellular heterogeneity between 3 pulpitis tissue and 3 healthy pulp tissue, and explored ferroptosis occurrence in pulpitis tissue and inflamed dental pulp cells (DPCs). In scRNA-seq, 40 231 cells (Pulpitis: 17 814; Healthy pulp: 22 417) were captured, and visualized into 12 distinct cell clusters. Differentially expressed ferroptosis-related genes (DE-FRGs) were almost presented in each cluster in pulpitis vs healthy pulp. ROS and Fe²⁺ levels significantly rose, and immunohistochemistry showed low expression of GPX4 and high expression of PTGS2 in pulpitis. In LPS-stimulated DPCs, thymosin α1 increased the expression of GPX4 and FTL, and decreased expression of TNF-α, IL-1β, IL-6, and Fe²⁺ levels. In rat pulpitis models, both prothymosin α (PTMA, precursor of thymosin α1) gelatin sponge placed at the hole of pulp (LPS-P(gs)) and PTMA injection in pulp (LPS-P(i)) significantly reduced infiltration of inflammatory cells and expression of PTGS2, and increased the expression of GPX4. In RNA sequencing, the expression of DE-FRGs were reversed when thymosin α1 were added in LPS-stimulated DPCs. Collectively, single-cell atlas reveals cellular heterogeneity between pulpitis and healthy pulp, and ferroptosis occurrence in pulpitis. Thymosin α1 may reduce ferroptosis in DPCs to alleviate pulpitis and thus potentially has the ability to treat pulpitis.
Ferroptosis/drug effects* ; Dental Pulp/drug effects* ; Animals ; Pulpitis/pathology* ; Rats ; Thymalfasin/pharmacology* ; Humans ; Male ; Thymosin/pharmacology* ; Disease Models, Animal ; Rats, Sprague-Dawley

OBJECTIVES: This study aimed to investigate the influence of the dimensional stability of 3D printed resin master model on the replication accuracy of implant replicas. METHODS: Ten digital impressions of patients undergoing continuous crowns or fixed bridge restoration supported by two implants were obtained, and resin models with implant replicas were 3D printed. Scanning rods were fixed on the replicas 3, 7, and 14 days after printing. The 3D, linear, and angular deviations of the scanning rods at different times were analyzed through Geomagic Wrap 2021 software. RESULTS: The position of the replicas shifted mesiolingually, in the same direction as the shrinkage of the model. From day 7 onward, the 3D, distance linear, and angular deviations of the replicas (scanning rod) significantly increased compared with those on the 3rd day (P<0.05). On the 14th day, the changes were even more pronounced, with the above deviations showing statistical significance (P<0.05) compared with those for the 3-day and 7-day groups. No statistical difference in height linear deviation was observed among the groups. CONCLUSIONS The insufficient dimensional stability of 3D printed resin models can lead to changes in the relative position and angle of the replicas, thereby affecting the accuracy of the replicas in recreating the implant's position. Complete manufacturing of prosthesis is recommended within 7 days after the model is printed.
Printing, Three-Dimensional ; Humans ; Dental Implants ; Models, Dental ; Dental Impression Technique ; Crowns

OBJECTIVES: To evaluate the accuracy of a self-developed extraoral scanning system based on four-camera stereophotogrammetric technology in the acquisition of three-dimensional positional information on dental implants and conduct a comparative study involving an intraoral scanning system. METHODS: With the use of an in vitro edentulous jaw model with implants, extraoral (experimental group) and intraoral (control group) scanning systems were employed to obtain STL (Standard Tessellation Language) datasets containing three-dimensional morphological and positional information on scan bodies. In addition, a dental model scanner was used to obtain reference data. The three-dimensional morphological, linear, and angular deviations between groups and reference data were analyzed using Geomagic Wrap 2021 software to compare trueness and precision. RESULTS: The extraoral scanning system demonstrated superior trueness in three-dimensional morphological, linear, and angular deviations compared with the intraoral scanning system, with statistically significant differences (P<0.001). The extraoral scanning system also showed a higher precision in three-dimensional morphological deviation (P<0.001). As the number of implants increased, the extraoral scanning system exhibited increased three-dimensional morphological and linear deviations (P<0.001) but maintained a stable angular deviation. The intraoral scanning system displayed significant increases in three-dimensional morphological, linear, and angular deviations with the increase in the number of implants (P<0.05). CONCLUSIONS The stereophotogrammetry-based extraoral scanning system outperforms intraoral scanning system in terms of the accuracy for multi-unit implant positioning and provides a novel approach for attaining a fully digital workflow for implant rehabilitation in edentulous jaws.
Jaw, Edentulous ; Humans ; Dental Impression Technique ; Dental Implants ; Imaging, Three-Dimensional/methods* ; Photogrammetry/methods* ; Models, Dental

OBJECTIVES: This study aimed to use machine learning algorithms to build a prediction model of the first permanent molar caries of 9-year-old children in Suzhou and screen out risk factors. METHODS: Random stratified whole group sampling was applied to randomly select 9-year-old students from 38 primary schools in 14 townships and streets in Wuzhong District for oral examination and questionnaire survey. Multifactor Logistics regression was used to analyze the risk factors of tooth decay. The data set was randomly divided into training sets and verification sets according to 8∶2, and R 4.3.1 was used to build five machine learning algorithms: random forest, decision tree, extreme gradient boosting (XGBoost), Logistics regression, and lightweight gradient enhancement (LightGBM). The predictive effect of these five models was evaluated using the area under the characteristic curve (AUC). The marginal contribution of quantitative characteristics to the caries prediction model was determined through Shapley additive explanations (SHAP). RESULTS: This study included 7 225 samples that met the standard. The caries rate of the first permanent molar was 54.96%. Multifactor Logistic regression analysis showed that sweet drinks, dessert and candy, snack frequency, and snacks before going to bed after brushing teeth were correlated with the occurrence of first permanent molar caries (P<0.05). The AUC values of decision tree, Logistic regression, LightGBM, random forest, and XGBoost were 75.5%, 83.9%, 88.6%, 88.9%, and 90.1%, respectively. Compared with the variables after single heat coding, the SHAP value of high-frequency sweets (such as dessert candy ≥2 times a day, mother's sugary diet ≥2 times a day) and bad oral hygiene habits (such as frequent snacks before going to bed after brushing teeth and irregular brushing teeth) exhibited the highest positive. CONCLUSIONS XGBoost algorithm has a good prediction effect for first permanent molar caries in 9-year-old children. High-frequency sweet factors and bad oral hygiene habits have a strong positive impact on the risk of first permanent molar caries and are key drivers that can be used in the formulation of targeted interventions.
Humans ; Dental Caries/epidemiology* ; Child ; Machine Learning ; China/epidemiology* ; Molar ; Risk Factors ; Female ; Logistic Models ; Male ; Decision Trees ; Algorithms

To explore the feasibility of using UAV-LiDAR for measuring the leaf area index (LAI) of crop canopies, we employed UAV-LiDAR to scan sugarcane canopies during the tillering and elongation stages, acquiring canopy point cloud data. Subsequently, features such as average row height, projected row area, point cloud density at different canopy layers, and the ratios between these parameters were extracted. Three feature selection methods-partial least squares regression (PLSR), XGBoost feature importance (XGBoost-FI), and random forest-recursive feature elimination (RF-RFE)-were adopted to evaluate and identify the optimal input variables for modeling. With these selected variables, LAI inversion models were developed based on random forest (RF) and adaptive boosting (AdaBoost) algorithms, and their performance was assessed. Among the extracted features, the projected row area S_p and the total row point count C_total exhibited strong correlations with LAI, with correlation coefficients of 0.73 and 0.72, respectively. The AdaBoost-based LAI inversion model, using the projected row area S_p, average height H_avg, mid-layer point cloud density C_m, and total row point count C_total as input variables, achieved the best performance, with a coefficient of determination (R_v²) of 0.713 and a root mean square error (RMSE_v) of 0.25 on the validation set. This study provides an effective method for high-throughput acquisition of LAI in field crops, offering valuable scientific support for sugarcane field management and breeding efforts.
Plant Leaves/growth & development* ; Saccharum/growth & development* ; Algorithms ; Unmanned Aerial Devices ; Remote Sensing Technology/methods* ; Crops, Agricultural/growth & development*

BACKGROUND

Telemedicine offers a solution to healthcare access issues, especially during the COVID-19 pandemic when physical distancing limited in-person visits. It can also be used by the Doctors-to-the-Barrios (DTTBs), who are often newly licensed physicians who have not undergone residency training yet, to remotely consult specialists and assist them in providing better healthcare recommendations to their patients. Understanding the acceptance of telemedicine particularly among DTTBs is crucial to optimizing its implementation, as local studies on this topic are lacking.

The purpose of this study is to determine the factors affecting acceptance of telemedicine by the DTTBs.

This study employed a descriptive and analytical cross-sectional research design from 2021 to 2022. Ethical approval was obtained prior to study implementation. Informed consent form was sent to all enrolled master’s students in the DTTB program. The study adapted the questionnaire utilized by Zailani et al. using a five-point Likert scale to identify the determinants of acceptance of telemedicine based on the following constructs: government policy, external supplier’s capacity, project team’s capacity, top management support, perceived usefulness, attitude, self-efficacy, acceptance of telemedicine, and organizational culture. Linear regression was performed to identify significant constructs that determine acceptance of telemedicine. All data were reported at 95% confidence interval.

Total of 116/180 DTTBs participated in the study. Attitude (β = 0.5849, p < 0.01) and self-efficiency (β = 0.5327, p < 0.01) together with organizational culture had a significant positive impact on the acceptance of telemedicine.

This study shows the current state of acceptance of telemedicine by our DTTBs. It highlights their positive attitude and self-efficiency towards telemedicine and the lack of support they receive from the government in funding and implementing telemedicine efforts despite its potential to address healthcare access issues.

BACKGROUND

During the COVID-19 pandemic, social isolation and quarantine measures set to control the spread of the infection paved for the increased utilization of virtual methods of consultation and follow-up. Telerehabilitation allows access to rehabilitation services despite distance and makes possible the continuation of rehabilitation services despite the lack of face-to-face interaction. This is difficult for pediatric patients who are dependent on their caregivers for understanding and making decisions regarding their health. Loss of continuity of rehabilitation services led to poorer outcomes in children with disabilities. Although advantageous for them, pediatric patients may not benefit from telerehabilitation if caregivers have negative perceptions of the process and are unwilling to utilize the service.

This study determined caregivers’ perceptions and willingness to participate in telerehabilitation as a method of outpatient follow-up for pediatric patients admitted to a COVID-referral center in a developing country.

The study utilized a descriptive cross-sectional design. Respondents were adults (≥19 years old) caring for pediatric patients admitted at non-COVID wards of the Philippine General Hospital and who were referred for rehabilitation services. A survey tool adapted from a previous study on willingness to utilize telemedicine among caregivers of pediatric patients was translated into the Filipino language and used in the study. A dataset from Excel was imported in STATA 16 (StataCorp, Texas, USA) and was exhaustively checked for completeness, accuracy, and consistency before analysis. The association between patient characteristics and willingness to utilize telerehabilitation for any app was determined using Pearson’s chi-squared test or Fisher’s exact test, as appropriate. The latter was used when more than 20% of the cells had an expected value of less than or equal to five. A P value of less than 0.05 was considered significant for all tests.

Of 123 respondents, 92 (75%) reported willingness to utilize telerehabilitation for outpatient consultation and therapy using video calls or a customized telerehabilitation app when available. Among 31 (25%) respondents who were not willing or unsure of participation, the main reasons identified were preference for face-to-face, lack of financial resources/load, poor connectivity, and doubt about the effectiveness of telerehabilitation.Patients with younger age (Fisher’s exact test, P=0.023), low usage of video call service (Fisher’s exact test, P=0.020), and lack of available devices (Fisher’s exact test, P=0.015) significantly reduced willingness to utilize telerehabilitation. Caregiver age, sex, educational attainment, estimated monthly income, number of devices used, speed of internet connectivity, and technological behaviors did not show statistical significance in association with willingness to participate in telerehabilitation.Most caregivers recognized the usefulness of a service allowing transmission of health data to and from the hospital, consultation with a doctor in case of an emergency, sending of reminders for medical visits and therapy, and provision of a list of home exercises and nutritional recommendations. Telerehabilitation was perceived advantageous, but concerns regarding privacy, trust, lack of human contact, and technological difficulty were also present.

With high levels of willingness among caregivers, telerehabilitation is a viable method of providing rehabilitation services for the continuation of management after inpatient admission among pediatric patients. Limitations in its utilization include technological issues including the lack of devices, low level of service use, and slow internet connectivity. Although well perceived as advantageous, there are concerns regarding loss of human contact, difficulty in using technological devices, and trust and privacy issues that may affect utilization.

BACKGROUND

The Philippine General Hospital (PGH) is a tertiary government hospital that serves as the national referral center for Filipinos from across the country. In partnership with Latter-Day Saint Charities (LDSC), PGH has been serving patients in need of mobility devices, such as wheelchairs, through in-person services from screening to assessment, measurement, assembly, fitting, and mobility training. Given the patients’ barriers to in-person follow-up consultations, regular healthcare provision has been challenging. The use of telerehabilitation, a form of telemedicine, has emerged as a practical and innovative solution, but it needs further evaluation.

The study aimed to determine the wheelchair recipients’ perceived barriers to in-person and virtual follow-up consultations.

This cross-sectional study involved a purposive sample of 413 patients who received a wheelchair from the LDSC through PGH. An original survey was prepared to determine patients’ perceived barriers to actual in-person and potential virtual follow-up consultations. Consent was obtained prior to data collection. After the pretest and pilot testing were conducted, the final version of the survey was administered either electronically or through individual phone interviews. Descriptive statistics was used to analyze and present the data.

A total of 113 wheelchair recipients participated, with an average of 42.9 years of age. The majority resided outside Metro Manila (53.1%), and 86.7% were within the income bracket of less than PhP 9,520 per month. The majority received a standard type of wheelchair (85.8%). The top 3 reasons hindering compliance to in-person consultation follow-ups were accessibility issues (82.3%), costs of travel (79.6%), and distance to hospital/wheelchair assessor (71.7%). With respect to potential virtual follow-ups, 72% expressed willingness to experience telemedicine/telerehabilitation in the future, despite having neither prior awareness (50.4%) nor experience (74.3%) of it. The majority had access to mobile phones (98.2%), and 67% had stable internet access.

The main barriers to in-person follow-ups were related to accessibility, costs, and travel. Telehealth or telerehabilitation in particular, despite patients’ interest and willingness to try it, still has yet to be optimized in our country. Internet connectivity can still be improved, as well as our stakeholders’ level of telehealth awareness. Future efforts to improve and sustain the uptake of telehealth solutions are recommended, as well as studies comparing the cost-effectiveness of in-person versus virtual consultations especially among persons with lived experiences of disability.