MDS PREP
Flare-ups during root canal treatment are commonly associated with which of the following
1. Teeth with vital pulp tissue compared to teeth with pulpal necrosis
2. Teeth with apical radiolucencies when compared to teeth with normal periapical tissue
3. With single-visit endodontics procedures
4. Symptomatic teeth exhibiting pulp necrosis
Endodontics
Answer: 4
Explanation: Flare-ups are more frequently observed in symptomatic teeth with
pulp necrosis due to the inflammatory response and the complexity of the root
canal system. This can lead to increased discomfort and complications during
treatment, necessitating careful management.
Moderate extrusion of obturating material and sealer beyond the apex is undesirable because
1. The prognosis is poor
2. There is likelihood of postoperative discomfort
3. Sealer is usually not resorbed and gutta-percha may cause severe perirdicular reaction in periapical tissue
4. All of the above
Endodontics
Answer: 4
When moderate extrusion of obturating material and sealer beyond the apex
occurs, it is undesirable for several reasons. While it does not necessarily
mean the prognosis is poor, there is a higher likelihood of postoperative
discomfort due to the potential for chemical irritation of the periapical
tissues. Additionally, if the sealer is not resorbed, it may cause a foreign
body reaction, and gutta-percha extrusion can sometimes lead to severe
periradicular reactions. The best approach in such a case is to obturate the
remaining canal up to the point of obstruction and observe the patient's
symptoms and healing response.
Sonic and ultrasonic instruments have in common
1) Used for flaring coronal portion of root-canal
2) Use copious amounts of irrigating solutions
3) Easy to control while operating
4) All of the above
Endodontics
Answer: 2
Both sonic and ultrasonic instruments are used in dental procedures, particularly in endodontics and scaling. They generate vibrations that help in the removal of debris and biofilm. A key feature of these instruments is that they require the use of copious amounts of irrigating solutions to enhance their effectiveness, cool the instrument, and flush out debris. While they may also be used for flaring coronal portions of root canals and can be controlled during operation, the commonality that stands out is the need for irrigating solutions.
High heat obturation technique refers to
1) Thermofill technique
2) Ultrafill technique
3) Sectional filling
4) Obtura II technique
Endodontics
Answer: 4
Obtura II is a high heat obturation technique used in endodontics (root canal treatment) to fill and seal the root canal system of teeth. This technique involves the use of a thermoplasticized gutta-percha, which is heated to a high temperature and then compacted into the root canal with a heat source such as a heated plugger or a heated tip of a handpiece. The heat helps to soften the gutta-percha, allowing it to adapt to the irregularities of the root canal system and form a tight seal against bacterial microleakage. Thermofill and Ultrafill are not high heat techniques, while sectional filling is a method of filling the canal in increments, which may or may not involve heat.
The irrigating should used with ultrasonic instruments used for preparation of root canal is
1) Sodium hypochlorite
2) Normal saline
3) Hydrogen peroxide
4) Chloramine
Endodontics
Answer: 1
Sodium hypochlorite is commonly used as an irrigating solution with ultrasonic instruments in endodontic treatment for its antimicrobial properties. It helps in the cleaning and disinfection of the root canal system by removing organic debris and bacteria. Normal saline, hydrogen peroxide, and chloramine are also used as irrigants, but sodium hypochlorite is the most effective in eliminating bacteria.
In an endodontically treated tooth
1. Resorption is more as compared to a normal tooth
2. Resorption is less
3. Resorption is same
4. Resorption is more after 2 years
Endodontics
Answer: 3
In an endodontically treated tooth, resorption is the same as in a normal tooth.
However, it is important to note that factors such as trauma, infection, or
other pathologies can affect the rate of resorption. The root canal treatment
itself does not inherently increase the susceptibility to resorption.
Stabilisation of avulses tooth requires
1) 1-2 weeks
2) 2-3 weeks
3) 4-6 weeks
4) More than 6 weeks
Endodontics
Answer: 1
The stabilization of an avulsed tooth typically requires a period of 1-2 weeks. During this time, the tooth is often replanted and stabilized to allow for healing and reattachment of the periodontal ligament.
According to WHO nomenclature of pulp injuries, "avulsion" is classified of pulp injuries as
1. 873.60
2. 873.61
3. 873.68
4. 873.69
Endodontics
Answer: 2
Explanation: In the WHO classification, avulsion refers to the complete
displacement of a tooth from its socket, and it is classified under 873.61. This
classification is crucial for understanding the severity of the injury and
determining the appropriate treatment.