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NDAEB Canadian Certified Dental Assistant - Blogs Sample Questions

Bisphenol A produces which effect in humans and animals?

Correct Answer:

bisphenol a (bpa) is a chemical compound predominantly used in the manufacturing of plastics and resins, including certain types of bottles, sports equipment, medical devices, and as coatings inside food and beverage cans. its widespread use has raised concerns about its safety, particularly regarding its effects on human and animal health.

the primary concern with bpa is its function as an endocrine disruptor, which means it can interfere with the body's hormonal systems. research has shown that bpa can mimic estrogen, a primary female sex hormone, and potentially disrupt normal hormone levels and functions in the body. this disruption is particularly concerning because it can impact developmental processes.

in humans, exposure to bpa has been linked to several developmental problems. for instance, prenatal exposure to bpa is associated with effects on fetal development, including potential impacts on brain development and behavior. studies have suggested that bpa exposure can lead to developmental disorders, such as adhd, and can also influence the physical and intellectual development of children. in adults, bpa exposure has been researched for links to various health issues, including reproductive disorders and impaired glucose tolerance.

similarly, in animal studies, bpa exposure has shown adverse effects on the development of various species. in rodents, exposure to bpa during gestational periods has been found to affect the reproductive systems of both males and females, influencing future fertility and reproductive behaviors. these studies often serve as a basis for understanding potential human health impacts, given the similarities in biological and endocrine systems across species.

despite ongoing research, the full extent of bpa's effects is still under investigation. regulatory bodies, such as the u.s. food and drug administration (fda) and the european food safety authority (efsa), continue to evaluate the safety of bpa and update their guidelines based on the latest scientific findings. some regions have already imposed restrictions on the use of bpa in products like baby bottles and other items frequently used by children.

in conclusion, the primary concern with bpa exposure is its potential developmental effects on both humans and animals. while some studies suggest that current levels of exposure in humans through items like dental resins are negligible, the ongoing research and debate underscore the need for cautious handling and regulation of this chemical to mitigate any potential health risks.

Approximately how many individual films are mounted in a full mouth survey?

Correct Answer:

a full mouth survey, often used in dental diagnostics, typically includes about 18 to 20 individual radiographic films. the purpose of this comprehensive radiographic examination is to provide a thorough overview of the dental structures and surrounding bone of a patient, which aids in diagnosing, planning, and treatment.

the films used in a full mouth survey are categorized mainly into two types: bite wing films and periapical films. there are typically 4 bite wing films included in the survey. bite wing films are crucial as they are specifically angled to capture the crowns of both the upper and lower teeth in one shot, which helps in identifying interdental decay and the level of bone support.

alongside the bite wings, there are about 14 periapical films. these films are designed to show the entire tooth from the crown to the tip of the root and the surrounding bone. periapical films are taken from various angles to ensure a comprehensive view of all the teeth and their supporting structures, which is vital for detecting issues such as abscesses, cysts, or impacted teeth.

in some cases, additional films may be necessary to focus on areas not clearly visible or sufficiently detailed on the initial films. these supplementary films are tailored to the specific needs of the patient and are added to their dental records for further reference.

overall, the full mouth survey is a fundamental diagnostic tool in dentistry, providing a detailed visualization of a patient's oral health status, which is essential for effective treatment planning and management.