MDS PREP
Anterior palatine nerve is anaesthetized by anterior palatine nerve block. The subjective symptoms include
1. Feeling of numbness in the posterior palate
2. Feeling of numbness in the anterior part of the palate near the incisors
3. Feeling of numbness of whole palate
4. Little or no subjective symptoms
Oral Surgery
Answer: 1
Feeling of numbness in the posterior palate. An anterior palatine nerve block
typically anesthetizes the palatal mucosa and soft tissues anterior to the
second premolars, including the palatal mucosa of the incisor and canine areas.
The numbness felt in the posterior palate is usually due to diffusion of the
anesthetic solution to the adjacent greater palatine nerve, which innervates the
palatal mucosa in the molar area.
Bell’s palsy is associated with
1. inflammation of the maxillary sinus
2. muscles of mastication
3. arthritis of the temporomandibular joint
4. facial nerve
Oral Surgery
Answer: 4
Bell's palsy is a form of temporary facial paralysis or weakness on one side of the face resulting from damage or trapping of the facial nerve (cranial nerve VII), which is the nerve that controls the muscles of facial expression.
In endodontic surgery, which of the following about chromic gut suture is not true
1. Its properties are inferior to plain gut suture
2. It is coated with chromium tri-oxide
3. It is less biocompatible than plain gut suture
4. Its absorption is faster than the plain gut sutures
Oral Surgery
Answer: 4
In endodontic surgery, the statement that chromic gut suture has faster absorption than plain gut sutures is not true.
The longest acting, most potent and most toxic LA is
1) Lidocaine
2) Dibucaine
3) Bupivacaine
4) Tetracaine
Oral Surgery
Answer: 2
Dibucaine (cinchocaine) is a highly potent and long-acting local anesthetic with high toxicity. It is often used in topical applications but is avoided for systemic use due to its high risk of adverse effects compared to alternatives like bupivacaine.
Which of the following would be indicated if one expected a long surgical procedure and a general anaesthetic to be administrated
1. Sodium thiopental iv
2. Vinyl ether, open drop method
3. Intubation with individually selected anaesthetic agent
4. None of the above
Oral Surgery
Answer: 3
If one expects a long surgical procedure and a general anaesthetic to be administered, intubation with individually selected anaesthetic agent is indicated.
For extraoral maxillary nerve block the target is
1. Anterior to lateral pterygoid plate
2. Posterior to lateral pterygoid plate
3. Pterygomandibular fossa
4. Pterygomandibular fissure
Oral Surgery
Answer: 1
Anterior to lateral pterygoid plate. In the extraoral maxillary nerve block, the
needle is inserted at the posterior aspect of the condylar neck and directed
anteriorly to target the pterygomandibular space, which contains the maxillary
nerve and its branches. This technique is used to anesthetize the molars and
premolars of the upper jaw and is also known as the Vazirani-Akinosi technique.
To drain pus from an abscess, the surgeon should
1) Cut an eclipse from the abscess surface to allow for a drain
2) Aspirate the contents
3) Penetrate into abscess cavity & probe with an artery forceps to allow for flow of pus
4) Cut only the mucosa and skin
Oral Surgery
Answer: 3
Proper abscess drainage involves creating an incision to allow pus to drain completely. Probing with an artery forceps ensures complete evacuation of the cavity. Other methods, like simple aspiration or superficial incisions, may not adequately drain the abscess.
The first sensation to be lost following administration of local anaesthetic is
1. Proprioception
2. Pain
3. Touch
4. Temperature
Oral Surgery
Answer: 2
The first sensation to be lost following administration of local anaesthetic is pain.