13 topics with concise reviews: definitions, key facts, and class questions.
Welcome to the most important section on propaedeutic dentistry. Here we examine the "extension of the dentist's hands"—basic and endodontic instruments. Without a thorough knowledge of these instruments, it is impossible to perform high-quality and safe treatment of the root canal system.
The section covers the entire evolution of endodontic supplies: from classical manual instruments, reamers, and orifice openers to modern rotary systems (ProTaper, ProFile, SAF). We will analyze in detail ISO international standardization, the principles of reciprocating systems, proper setup of endodontic motors, the use of ultrasound, and instruments for the final stage—root canal filling.
In practical classes and exams, you will most often be asked about ISO color and geometric coding, the differences between active and passive instruments, and protocols for safe work with rotary files. Study the theory: a broken instrument in the canal is the main phobia of a beginning doctor, which can only be overcome with solid knowledge.
What is the difference between Type A and Type B surgical gloves?
Type A products are made of rubber adhesive, and Type B products are made of a latex mixture, which makes them more durable and resistant to mechanical stress.
How does an endodontic excavator differ from a standard one?
Endodontic models feature an elongated shank, a sharp blade inclination angle, and a special system of bends (from one to three), which facilitates access into deep and narrow cavities.
Why is it better to avoid metal spatulas when mixing cement?
Cement powder has abrasive properties. When rubbing against metal, it can scrape off microparticles of steel, leading to their ingress into the material and unwanted discoloration of the restoration.
What is the main difference between Winter's elevator and Barry's elevator?
In Winter's elevator, the connecting shaft is straight and located strictly perpendicular to the handle (T-shape). In Barry's elevator, the shaft has a bend relative to the handle.
How does the needle gauge in G relate to its thickness in millimeters?
The Gauge (G) system measures the size of the internal lumen. The larger the G number, the thinner the needle. For example, a 20G needle has an outer diameter of 0.9 mm, while a 30G needle is only 0.3 mm.
Master the entire topic in the «Propaedeutics of Dentistry» course
This is a summary. The course covers everything tested in classes and exams.
868 pages of study guides for all topics
Assignments and quizzes after every topic — just like in a colloquium