Introduction: Dental caries is a preventable chronic disease whereby identification of risk factors will facilitate preventive measures. This study aims to determine the level of oral health literacy (OHL), self-care practices (SCP), salivary parameters and ascertain its assocation with caries status amongst the undergraduates in IMU University. Methods: Levels of OHL (Knowledge-OHL, dental services utilisation, and label reading habit) and SCP were assessed through a self-administered questionnaire. Chairside saliva kits were used to measure the salivary parameters whilst clinical examination was performed to assess caries status. Independent T-test and Analysis of Variance (ANOVA) was used to compare differences between sex and courses respectively for measures of interest (OHL, SCP, salivary parameters, and caries status) whereas bivariate correlation with Pearsons’s coefficient was performed to examine their association with caries status. Results: The participants (n=132) had a mean Knowledge-OHL score of 23.75±8.09 with no significant difference between sex (females, 24.01±8.51; males, 23.48±7.69; p=0.15). Dentistry students had significantly higher Knowledge-OHL score than students of all other courses (p=0.01). The mean SCP score was 20.19±3.16 whereas mean DMFT was 2.32 ±3.14. All participants had healthy saliva parameters. Caries status was significantly correlated with Knowledge-OHL score (p=0.02, r=-0.18), dental services utilisation (p=0.04, r=-0.15) but not with label reading habit (p=0.78, r=0.03), SCP (p=0.30, r=-0.05) and all salivary parameters. Conclusion Knowledge-OHL and oral health services utilisation are significantly associated with oral health status
Dental Caries ; Health Literacy ; Oral Health ; Saliva ; Self Care

Tooth eruption is a localised event whereby the signals for eruption for a given tooth are synthesised in the dental follicle of that tooth with a possible cross talk of signals coming from the adjacent stellate reticulum. The eruption process requires alveolar bone resorption that is primarily regulated by the dental follicle. This is reflected by the fact that failures of eruption often can be traced to either osteoclast deficiencies or to dental follicle abnormalities. Recent advances in application of molecular techniques to animal models allowed for better understanding of gene regulatory events involved in the physiology of tooth eruption. This article attempts to consolidate and organise the facts that offshoot from animal studies.
Tooth Eruption ; Dental Sac ; Molecular Biology

OBJECTIVE

The objective of the study was to determine the effectiveness of self-directed learning (SDL) strategy in dentistry by comparing it with lecture. Specifically, the objectives were to describe the students' perception of their learning experience after each TL strategy, compare the students' cognitive performance, determine whether certain student characteristics influence these two variables, and identify whether these two variables are correlated.

Total enumeration was done in the selection of student-respondents. Using a two-treatment counterbalanced experimental research design, two kinds of data were collected after completion of each TL strategy – post-test scores that indicate the students' cognitive performance (lowest score is zero; highest score is 20) and Assessment of University Teaching Activities Questionnaire (A.U.T.A.Q.) results, indicating students' perceptions on their learning experience (5-point scale from strongly disagree to strongly agree).

Results showed that there is a statistically significant difference between the total mean of A.U.T.A.Q. after SDL (M=3.94, SD=.480) and lecture (M=3.74, SD=.658); p =.024. Statistically significant difference (p .05). Nationality and sex did not significantly affect the students' perceptions and cognitive performance except in the third year level. Finally, there is no correlation between these two factors.

It can be concluded that SDL is as equally effective as lectures, but it must be used cautiously at lower year levels where lecture is still more beneficial. Lower year levels exhibited higher cognitive performance after lecture while the higher year levels displayed higher cognitive performance after SDL.

The reduction of nitrate to nitrite by the oral microbiota has been proposed to be important for oral health and results in nitric oxide formation that can improve cardiometabolic conditions. Studies of bacterial composition in subgingival plaque suggest that nitrate-reducing bacteria are associated with periodontal health, but the impact of periodontitis on nitrate-reducing capacity (NRC) and, therefore, nitric oxide availability has not been evaluated. The current study aimed to evaluate how periodontitis affects the NRC of the oral microbiota. First, 16S rRNA sequencing data from five different countries were analyzed, revealing that nitrate-reducing bacteria were significantly lower in subgingival plaque of periodontitis patients compared with healthy individuals (P < 0.05 in all five datasets with n = 20-82 samples per dataset). Secondly, subgingival plaque, saliva, and plasma samples were obtained from 42 periodontitis patients before and after periodontal treatment. The oral NRC was determined in vitro by incubating saliva with 8 mmol/L nitrate (a concentration found in saliva after nitrate-rich vegetable intake) and compared with the NRC of 15 healthy individuals. Salivary NRC was found to be diminished in periodontal patients before treatment (P < 0.05) but recovered to healthy levels 90 days post-treatment. Additionally, the subgingival levels of nitrate-reducing bacteria increased after treatment and correlated negatively with periodontitis-associated bacteria (P < 0.01). No significant effect of periodontal treatment on the baseline saliva and plasma nitrate and nitrite levels was found, indicating that differences in the NRC may only be revealed after nitrate intake. Our results suggest that an impaired NRC in periodontitis could limit dietary nitrate-derived nitric oxide levels, and the effect on systemic health should be explored in future studies.
Humans ; Nitrates ; Nitric Oxide ; Nitrites ; RNA, Ribosomal, 16S/genetics* ; Periodontitis/microbiology* ; Bacteria ; Dental Plaque/microbiology* ; Saliva/microbiology* ; Microbiota/genetics*

Background and Objectives: Nutritional deficiency in stunting toddlers is closely related to the calcium deficiency which is the most important component of the formation of bone and tooth structure. Deficiency of calcium can delay tooth eruption and increase the risk of dental caries. Little is known about the difference in dental caries severity on stunting and non-stunting toddlers in Kalisat, Jember, Indonesia. The study aims to examine the differences between the severity of dental caries on stunting and non-stunting toddlers. Methods: This was an analytic observational study with a cross-sectional approach conducted in the working area of Kalisat Health Center, Jember, Indonesia. The population was stunting and non-stunting toddlers aged 25-60 months. The samples were selected using clustered random sampling technique (100 stunting toddlers and 100 non-stunting toddlers). Variables in this research were dental caries and incidence of stunting. The measurement of dental caries in toddlers was carried out by identifying the worst type of dental caries in toddlers, which occurred as pulp irritation (IP), pulp hyperemia (HP), pulp gangrene (GP), and radix gangrene (GR). Data analysis was descriptive. Mann Whitney U-test was used with 0.05 (p-value) as a test to analyze the differences between stunting and non-stunting toddlers’ dental caries. Results: Stunting toddlers had more cases of pulp gangrene and radix gangrene than non-stunting toddlers. Mann Whitney U-Test showed the p-value was 0.038 (p < 0.05) which meant there were differences in dental caries between stunting and non-stunting toddlers. Conclusion Most of the stunting toddlers had more severe dental caries than the non-stunting toddlers.
Dental Caries ; Stunting ; Growth Disorders

OBJECTIVES

This study aims to establish baseline data on the knowledge, attitudes, and practices (KAP) of senior dental clinicians, which may help determine areas of ICDAS that could be reinforced in teaching, training, and open opportunities for future studies in the Philippines.

A quantitative descriptive study design used a 4-part online questionnaire for senior dental clinicians from A.Y. 2020-2021 with 1-2 semesters of clinical experience. The survey tool, via Google Forms, gathered general information about the participants and KAP on ICDAS.

Out of 29 participants, 19 (66%) had 1 semester, and 10 (34%) had 2 semesters of clinical experience. Overall mean score for knowledge was 76.1% and is considered “adequate”. Five participants (17%) failed to reach the cut-off score of 70%. Based on the overall mean score, the participants were found to have a “positive” attitude. Two (7%) were categorized as “very negative”. For the Practice component, all the clinicians showed “good practice.”

The senior dental clinicians have demonstrated adequate knowledge, positive attitude, and good practice on ICDAS. A small percentage of the participants scored lower in their K (17%) and A (7%) scores. Even with good results, there is still a need to reinforce some of the basic ICDAS principles and more clinical exposure to reinforce the clinicians’ skills in diagnosis and encouragement in using ICDAS.

To explore the effects of plasma jet (PJ) and plasma activated water (PAW) on the sterilization of Streptococcus mutans ( S. mutans) and compare the advantages and disadvantages of the two methods, so as to provide a basis for plasma treatment of dental caries and to enrich the treatment means of dental caries, an atmospheric pressure plasma excitation system was built, and the effects of PJ and PAW on the sterilization rate of S. mutans and the changes of temperature and pH during treatment were studied under different excitation voltage ( U _e ) and different excitation time ( t _e ). The results showed that in the PJ treatment, the difference in the survival rate of S. mutans between the treatment group and the control group was statistically significant ( P = 0.007, d=2.66) when U _e = 7 kV and t _e = 60 s, and complete sterilization was achieved at U _e = 8 kV and t _e = 120 s in the PJ treatment. In contrast, in the PAW treatment, the difference in the survival rate of S. mutans between the treatment group and the control group was statistically significant ( P = 0.029, d = 1.71) when U _e = 7 kV and t _e = 30 s, and complete sterilization was achieved with PAW treatment when U _e = 9 kV and t _e = 60 s. Results of the monitoring of temperature and pH showed that the maximum temperature rise during PJ and PAW treatment did not exceed 4.3 °C, while the pH value after PAW treatment would drop to a minimum of 3.02. In summary, the optimal sterilization parameters for PJ were U _e =8 kV and 90 s < t _e ≤ 120 s, while the optimal sterilization parameters for PAW were U _e = 9 kV and 30 s< t _e ≤ 60 s. Both treatment methods achieved non-thermal sterilization of S. mutans, where PJ required only a smaller U _e to achieve complete sterilization, while at pH < 4.7, PAW only required a shorter t _e to achieve complete sterilization, but its acidic environment could cause some chemical damage to the teeth. This study can provide some reference value for plasma treatment of dental caries.
Humans ; Streptococcus mutans ; Dental Caries/therapy* ; Sterilization ; Temperature ; Water

Znic (Zn) alloys with good cytocompatibility and suitable degradation rate have been a kind of biodegradable metal with great potential for clinical applications. This paper summarizes the biological role of degradable Zn alloy as bone implant materials, discusses the mechanical properties of different Zn alloys and their advantages and disadvantages as bone implant materials, and analyzes the influence of different processing strategies (such as alloying and additive manufacturing) on the mechanical properties of Zn alloys. This paper provides systematic design approaches for biodegradable Zn alloys as bone implant materials in terms of the material selection, product processing, structural topology optimization, and assesses their application prospects with a view to better serve the clinic.
Orthopedics ; Zinc ; Alloys ; Dental Materials ; Prostheses and Implants

Circadian rhythm is regulated by circadian clock, which is formed by the body response to external cyclic stimuli through the endogenous circadian clock. Circadian rhythm disturbance is closely related to the risks of a variety of diseases, and its impact on oral health cannot be ignored. Exploring the relationship and related molecular mechanism between circadian rhythm and dental hard tissues development are helpful to deeply understand the pathogenesis of developmental defects on these tissues, which could provide a theoretical basis for prevention and treatment on disorders of dental hard tissues. In order to provide guidance for the disease prevention and treatment, based on the summarization of current research progress, this paper focuses on the involvement of biorhythm in the development of tooth hard tissues as well as the disturbance of circadian rhythm on the formation of enamel and dentin, and analyzes the related regulating mechanism of circadian rhythm and genes during the development of tooth hard tissues.
Circadian Rhythm/genetics* ; Dental Enamel ; Oral Health

Fused teeth were a phenomena of teeth anomalies in shape, which can affect the dental teeth both in primary and permanent dentition. Fused teeth do not only cause problems on crowding of dentition, abnormal occlusion and aesthetic, but also increase risks of dental caries, endodontics diseases, periapical diseases and periodontal diseases. Fusion of deciduous teeth may lead to abnormality of subsequent permanent teeth. Treatment of fused teeth may require multidisciplinary approach in endodontics, periodontics, oral and maxillofacial surgery, prosthodontics and orthodontics. The aim of the present article is to review the etiology, classification, clinical manifestations and treatment of fused teeth in order to provide dental clinicians with a reference of clinical management for fused teeth.
Humans ; Fused Teeth/therapy* ; Anodontia ; Tooth, Deciduous ; Dental Caries/therapy* ; Esthetics, Dental