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Why we go to the dentist
\"Teeth need lots of brushing and flossing to stay healthy--but why? Going to the dentist helps us learn more about the importance of clean teeth\"-- Provided by publisher.
Book
Comparative Evaluation of Nanosized Intracanal Medicaments on the Penetration and Fracture Resistance of Root Dentin: An In Vitro Study
The use of calcium hydroxide (CH) is crucial in the proper disinfection of root canals. However, CH affects the fracture resistance of root dentine and also has limited permeability. Nano-based intracanal medicaments have several benefits over traditional medicaments, including a greater surface area-to-volume ratio and better penetrability. Therefore, this in vitrostudy was performed to evaluate and compare the effect of conventional CH and various nanoparticle-based intracanal medicaments on the penetration and fracture resistance of radicular dentin.
One hundred samples were taken and randomly divided into four (n=20) experimental groups (nano-CH (NCH), nano-chitosan (NCS), NCH + nano-silver (NAg), NCS + NAg, and a control group (CH). At the end of one month, out of the 20 samples from each group, 10 samples were used to assess the fracture resistance in a universal testing machine, and the other 10 samples were used to determine the depth of penetration using a field emission scanning electron microscope.
The mean fracture resistance of root dentin value was the highest with group II (NCS) and the least in the control group (CH), which was statistically significant. The maximum penetration depth of intracanal medicaments was observed with group III (NCH + NAg) and the least in the control group (CH), which was statistically significant. Among the thirds of the root samples, the highest mean depth of penetration was seen in the coronal third and the least in the apical third in all the groups, which was statistically significant.
The resistance to fracture and penetration depth at a four‑week interval were higher in nano forms when compared with conventional CH.
Journal Article
Visit the dentist!
\"Visit the Dentist! focuses on dentist visits while discussing steps children can take to practice healthy lifestyles. Readers are introduced to what may happen during a typical dental exam and specifics about the job of a dentist. Callouts prompt inquiry, further thinking, and close examination of photographs. Additional text features and search tools, including a glossary and an index, help students locate information and learn new words.\"--Provided by publisher.
Book
Evaluation of the Condyle-Fossa Relationship in Angle’s Class II Division 1 Malocclusions Using Cone-Beam Computed Tomography: A Descriptive Cross-Sectional Study in Humans
Background The condyle-fossa relationship is essential for smooth, pain-free jaw movement, relying on symmetrical and balanced condyles. However, this relationship may vary in individuals with malocclusions. Despite its clinical significance, few studies have examined the three-dimensional aspects of condyle morphology and position in class II division 1 malocclusion, and there is a lack of comprehensive data on its subdivision. Aim and objective This study aimed to assess and compare the condyle-fossa relationship, condyle positions, and the dimensional and positional symmetry between the right and left condyles in class II division 1 malocclusion and its subdivisions. Methodology Eighty patients aged 18 years and older were categorized into two groups: the control group (class II division 1) and the test group (class II division 1, subdivision), with 40 individuals in each group. Cone-beam computed tomography (CBCT) images were used for the evaluation, employing Will Master software (HDX WILL Corporation, Korea). Digital measurements, including condyle-fossa depth, joint spaces, and positional parameters, were taken using OnDemand 3D software (version 2016.12, Cybermed, Korea). Statistical analysis included descriptive statistics, t-tests, and one-way analysis of variance (ANOVA), with Tukey's post hoc tests for multiple pairwise comparisons. Results No significant differences were found between the right and left sides across all parameters in the control group. In contrast, the test group showed significant differences in condylar fossa depth (P=0.001) and superior joint space (P=0.006). The class I side exhibited a higher mean condylar fossa depth than the class II side, while the class II side displayed a higher mean superior joint space. Comparisons between the control and test groups revealed significant differences in mean condylar fossa depth (P=0.001), anterior joint space (P=0.014), and mediolateral diameter of the condylar process (P=0.009). Conclusions Significant differences were observed in condylar fossa depth and superior joint space between the class II division 1 subdivision group and the class II division 1 group. Additionally, asymmetry in condylar positions was noted, with the class I side showing a deeper condylar fossa and the class II side displaying a larger superior joint space.
Journal Article