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Specialty Dental Assisting

Oral Surgery Pre and Post Assist Practice Questions

20 free Oral Surgery Pre and Post Assist practice questions for the CDA. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.

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Question 1 of 20 Medium

What is the primary role of the dental assistant during the preoperative phase of oral surgery?

  1. A To diagnose the patient's underlying surgical condition beforehand
  2. B To prepare the operatory and instruments and review the history
  3. C To administer local anesthesia
  4. D To prescribe postoperative medications

Correct answer: To prepare the operatory and instruments and review the history

The dental assistant prepares the surgical area, organizes instruments, and verifies the patient’s medical history to ensure safety. Diagnosis, anesthesia administration, and prescribing medication are outside their scope.

Question 2 of 20 Medium

Why is a thorough medical history essential before oral surgery?

  1. A It lets the assistant independently choose the anesthetic agent
  2. B It flags conditions that may affect healing or bleeding
  3. C It determines how long the procedure will take
  4. D It replaces the need for informed consent

Correct answer: It flags conditions that may affect healing or bleeding

Medical history reveals conditions such as bleeding disorders, diabetes, or heart disease that influence surgical planning. It helps prevent complications and ensures patient safety.

Question 3 of 20 Medium

Which instrument is essential for retracting the cheek during oral surgery?

  1. A Minnesota retractor
  2. B Rongeurs
  3. C Periosteal elevator for raising flaps
  4. D Bone file

Correct answer: Minnesota retractor

A Minnesota retractor is specifically designed to retract soft tissues like the cheek. Rongeurs and bone files manipulate bone, while elevators raise flaps.

Question 4 of 20 Medium

What is the dental assistant’s priority immediately after the surgeon begins a surgical extraction?

  1. A Hand the patient their written discharge instructions
  2. B Maintain a clear field with suction and retraction
  3. C Take postoperative radiographs
  4. D Prepare the next patient's chart

Correct answer: Maintain a clear field with suction and retraction

Clear visibility is crucial during surgery, and the assistant must use suction and retraction to support the surgeon. Postoperative tasks are performed only once the surgery is complete.

Question 5 of 20 Medium

Which postoperative instruction is most important after a tooth extraction?

  1. A Rinse vigorously for 24 hours
  2. B Avoid smoking or using straws
  3. C Brush directly over the socket
  4. D Lie flat for several hours

Correct answer: Avoid smoking or using straws

Smoking and using straws can dislodge the blood clot, increasing the risk of dry socket. Patients should avoid vigorous rinsing or brushing directly over the site initially.

Question 6 of 20 Medium

What is the purpose of a surgical curette during oral surgery?

  1. A To smooth and refine sharp bony edges after extraction
  2. B To remove diseased tissue and debris from the socket
  3. C To retract the surrounding soft tissues
  4. D To section a multi-rooted tooth

Correct answer: To remove diseased tissue and debris from the socket

Surgical curettes are used to thoroughly clean the socket by removing granulation tissue or debris. Bone files smooth bone, retractors move tissues, and burs or handpieces section teeth.

Question 7 of 20 Medium

Why must the assistant ensure that sterilized surgical packs remain sealed until use?

  1. A To keep the instruments warm before use
  2. B To preserve sterility and prevent contamination
  3. C To ensure the instruments stay sharp and rust-free for longer
  4. D To reduce noise in the operatory

Correct answer: To preserve sterility and prevent contamination

Surgical packs must remain sealed to preserve sterility. Opening them too early increases contamination risk and compromises the procedure’s safety.

Question 8 of 20 Medium

Which condition requires immediate communication to the dentist during pre-op screening?

  1. A A mild headache
  2. B Use of a blood thinner such as warfarin
  3. C A history of seasonal allergies to pollen
  4. D Patient reports feeling slightly nervous

Correct answer: Use of a blood thinner such as warfarin

Blood thinners significantly affect bleeding risk during oral surgery. The dentist must evaluate and possibly adjust the treatment plan accordingly.

Question 9 of 20 Medium

Which of the following is a correct postoperative instruction for a patient who has just undergone surgical extraction?

  1. A Apply heat directly to the extraction area straight away
  2. B Expect mild bleeding and change gauze as directed
  3. C Brush the extraction area aggressively
  4. D Lie completely flat for several hours

Correct answer: Expect mild bleeding and change gauze as directed

Light bleeding is normal and managed with gauze; the patient should follow the dentist’s directions. Heat and aggressive brushing may disturb the clot and worsen the condition.

Question 10 of 20 Medium

During oral surgery, what is the purpose of using a hemostat?

  1. A To grasp soft tissue and hold sutures
  2. B To cut and trim surrounding alveolar bone
  3. C To smooth tooth roots
  4. D To retract the tongue

Correct answer: To grasp soft tissue and hold sutures

Hemostats grasp tissue or sutures and assist in controlling bleeding. They do not cut bone or smooth roots.

Question 11 of 20 Medium

What is the assistant’s role in monitoring the patient during intravenous (IV) sedation?

  1. A Administer the intravenous sedation medication personally
  2. B Continuously observe vital signs and responsiveness
  3. C Diagnose any adverse reaction
  4. D Perform the surgical procedure

Correct answer: Continuously observe vital signs and responsiveness

The assistant helps monitor vital signs to ensure patient safety during sedation. Only the dentist or qualified provider administers sedation and makes diagnoses.

Question 12 of 20 Medium

Why should a patient avoid vigorous rinsing within 24 hours after oral surgery?

  1. A It may cause nausea
  2. B It can dislodge the blood clot and delay healing
  3. C It weakens sutures
  4. D It increases risk of infection spreading to the lungs

Correct answer: It can dislodge the blood clot and delay healing

Vigorous rinsing can remove the clot essential for healing and lead to dry socket. Rinsing lightly is permitted only after the first 24 hours.

Question 13 of 20 Medium

In the pre-op area, the assistant notices the patient ate shortly before surgery requiring IV sedation. What should the assistant do?

  1. A Proceed with the surgery exactly as originally scheduled
  2. B Give the patient extra gauze
  3. C Inform the dentist, since sedation requires fasting
  4. D Ask the patient to drink water instead

Correct answer: Inform the dentist, since sedation requires fasting

Eating before IV sedation increases the risk of aspiration. The dentist must evaluate whether the procedure should be postponed.

Question 14 of 20 Medium

What is the primary purpose of sutures after oral surgery?

  1. A To improve and refine the patient's occlusal bite
  2. B To control bleeding and promote tissue healing
  3. C To retain dental restorations
  4. D To allow earlier brushing over the area

Correct answer: To control bleeding and promote tissue healing

Sutures stabilize the surgical site, control bleeding, and support healing. They are not for restorations or occlusal adjustment.

Question 15 of 20 Medium

Which action by the dental assistant helps maintain asepsis during oral surgery?

  1. A Touching sterile instruments with gloved hands after adjusting overhead lights
  2. B Keeping the surgical tray covered until the procedure starts
  3. C Allowing patients to adjust their own headrest during surgery
  4. D Using utility gloves to pass instruments

Correct answer: Keeping the surgical tray covered until the procedure starts

Sterile trays must remain covered to prevent contamination. Touching lights or using utility gloves breaks the aseptic chain.

Question 16 of 20 Medium

What type of extraction requires reflection of a flap and removal of bone?

  1. A Simple extraction
  2. B Surgical extraction
  3. C Orthodontic extraction
  4. D Emergency extraction

Correct answer: Surgical extraction

Surgical extractions involve gum reflection and bone removal for access. Simple extractions require only forceps and elevators without bone removal.

Question 17 of 20 Medium

Which postoperative sign should be reported immediately to the dentist?

  1. A Mild soreness at the extraction site
  2. B Increasing swelling after 48-72 hours
  3. C Minor oozing of blood from the socket edge
  4. D Slight bruising near the jaw

Correct answer: Increasing swelling after 48-72 hours

Swelling typically peaks at 48 hours and then decreases. If swelling increases afterward, it may indicate infection or other complications.

Question 18 of 20 Medium

Which item is used to control bleeding during and after oral surgery?

  1. A Cotton rolls
  2. B Gauze sponges
  3. C Alginate impressions
  4. D Plastic wedges

Correct answer: Gauze sponges

Gauze sponges apply pressure to help form and maintain the blood clot. Cotton rolls are less absorbent and not ideal for surgical bleeding control.

Question 19 of 20 Medium

What should the assistant verify before the patient signs the informed consent form?

  1. A That the patient understands the procedure and risks
  2. B That the patient has already paid the full fee for the procedure
  3. C That the patient knows the assistant's name
  4. D That the operatory is already fully set up

Correct answer: That the patient understands the procedure and risks

Informed consent requires patient understanding of the procedure, risks, benefits, and alternatives. It must be completed before surgery begins.

Question 20 of 20 Medium

Which step is part of proper instrument passing during an oral surgery procedure?

  1. A Passing every instrument with the sharp working end facing the dentist
  2. B Passing with a firm, deliberate motion and eye contact
  3. C Passing instruments loosely to reduce hand strain
  4. D Placing instruments randomly on the patient's bib

Correct answer: Passing with a firm, deliberate motion and eye contact

Instruments should be passed decisively and safely, ensuring the working end is oriented for immediate use. Random placement or unsafe orientation increases risk.

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