The application of deep learning in early enamel demineralization detection.

Objective: The study aims to develop a diagnostic model using intraoral photographs to accurately detect and classify early detection of enamel demineralization on tooth surfaces.

Methods: A retrospective analysis was conducted with 208 patients aged 14 to 44. A total of 624 high-quality digital images captured under standardized conditions were used to construct a deep learning model based on the Mask region-based convolutional neural network (Mask R-CNN).

Saliva microbiome alterations in dental fluorosis population.

Background: We aimed to explore saliva microbiome alterations in dental fluorosis population.

Methods: The prevalence of dental fluorosis was examined in 957 college students. Dean's fluorosis index was used to evaluate the dental fluorosis status.

[Clinical effects of two different hydroxyapatite bone graft materials during maxillary sinus lifting surgery with bone grafting and simultaneous implantation of implants].

Purpose: To compare the clinical effects of two different hydroxyapatite bone graft materials in maxillary sinus lifting surgery with bone grafting and implantation at the same time.

Methods: Seventy-two patients with implantation in the maxillary posterior dental area and insufficient bone mass admitted to the First Affiliated Hospital of Bengbu Medical College were collected from March 2018 to April 2019, and they were divided into experimental group(n=36) and control group(n=36) by random number table. Patients in the control group used hydroxyapatite composite material, while patients in the experimental group used nano-hydroxyapatite composite material.

Arginine-induced metabolomic perturbation in .

Background: is a major pathogen responsible for dental caries. Arginine is a promising potential caries preventive agent which can inhibit the growth of . However, the mechanism whereby arginine inhibits growth remains unclear.

Analysis of the distribution of supernumerary teeth and the characteristics of mesiodens in Bengbu, China: a retrospective study.

Objectives: To evaluate the distribution of supernumerary teeth (ST) and the characteristics of mesiodens.

Methods: Panoramic radiographs of 48,700 outpatients were used to assess the distribution of ST. A total of 142 cone beam computed tomography (CBCT) images were used to evaluate the characteristics of mesiodens.

Lack of association between PAX6/SOSTDC1/FAM20B gene polymorphisms and mesiodens.

Background: The purpose of this study was to analyze the association between the genetic polymorphism of genes (PAX6, SOSTDC1and FAM20B) and the susceptibility to mesiodens.

Methods: This study was carried out on 50 patients with mesiodens and 50 controls. The family history of each patient with mesiodens were recorded.

[Correlation between quantitative nerve fiber layer thickness and mean defect of visual field in primary open angle glaucoma].

Objective: To establish whether the structural parameters provided by GDx can be used to reflect functional damage in the mean defect of visual field.

Methods: 97 (191 eyes) patients with primary open angle glaucoma underwent examination with GDx and Octopus 1-2-3 automatic perimeter. The relationship between the retinal nerve fiber layer parameters and mean defect of visual field was analysed by ANOVA, Pearson's correlation(r), scatter plot and linear regression.

Refractive error in urban and rural adult Chinese in Beijing.

Purpose: To evaluate refractive error and its demographic associations in an urban and rural population in northern China.

Design: Epidemiological study.

Participants: The Beijing Eye Study is a population-based cohort study in northern China including 4439 subjects.

[Single channel multifocal VEP studies in normal Chinese].

Objective: To investigate the waveform characters of single channel mVEP and its variability in normal Chinese people.

Methods: VERIS Science 4.3 system was used to record and analyze single channel mVEP.

[The value of frequency doubling perimetry in glaucoma screening of aged 40 or more population].

Objective: To investigate the diagnosis value of the frequency doubling perimetry (FDP) screening program in the aged 40 or more natural population-based glaucoma screening.

Methods: In 3 natural villages of Daxing District and 4 northern metropolitan communities of Beijing, 4439 subjects aged 40 or over were screened for glaucoma from May to October in 2001. The screening protocol C-20-1 of the frequency doubling perimetry (FDP) was used in all subjects.

[The prevalence and its screening methods of primary open angle glaucoma in defined population-based study of rural and urban in Beijing].

Objective: The purpose of the study is to determine the prevalence of primary open-angle glaucoma (POAG) in persons aged 40 or above in Beijing, China.

Methods: From June 2001 to October 2001, the screening population was identified by a door-to-door census in five metropolitan resident areas in the north of Beijing and three villages in a county south to Beijing. The screening included visual acuity, frequency doubling perimetry (FDP, C-20 screening program), non-contact tonometry, slit lamp microscopy, anterior chamber depth (Van Herick method), and fundus photography.

[Prevalence of low vision and blindness in defined populations in rural and urban areas in Beijing].

Objective: To investigate the prevalence and causes of low vision and blindness in Beijing residents aged 40 and over.

Methods: 4,451 residents aged 40 and over in 3 rural communities and 5 urban communities in Beijing underwent eye examination, including examination of distant and near visual acuity (VA), best corrected distant and near VA, pinhole VA, and visual field, slit lamp biomicroscopy, and dilated ocular examination in the form of in-home survey by defined population-based sampling. The medical history was surveyed too.