INBDE ORAL SURGERY 2026 UPDATED ACTUAL Questions
and CORRECT Answers
2. Pell & Gregory - Depth Classification (A, ClassDescriptionMemory Tip
B, C) A=Crown level with occlusal plane"A = At level
"B=Crown below occlusal but above CEJ of 2nd molar"B =
Below surface
"C=Crown is beneath CEJ of 2nd molar"C = Covered deep"
3. Pell & Gregory – Ramus Classification (I, I Enough space for 3rd molar"I = Ideal
II, III)
How much room is between 2nd molar and II Partial space (half covered by ramus)"II = In between
anterior border of the ramus.
III Fully embedded in ramus (no space)"III = Inside the bone"
Each of the following is true about the Natural teeth have Sharpey’s fibers from the periodontal
connective tissue attachment surrounding ligament that insert directly into the cementum and alveolar
an implant EXCEPT one. Which is the bone.
EXCEPTION?
Dental implants DO NOT have a periodontal ligament.
Instead, implants are surrounded by parallel-oriented
collagen fibers that do not insert into the titanium surface.
, 🦷 Top 3 Reasons to Extract Wisdom Teeth
Impaction Tooth can't fully erupt due to lack of space
Can lead to pain, infection, or damage to nearby teeth
Pericoronitis
Inflammation/infection of gum flap over a partially erupted
tooth
Common in lower 3rd molars
Caries or Resorption
Difficult to clean → decay or resorption of adjacent 2nd molar
🅰 Le Fort I (Horizontal Fracture)
Definition: A horizontal fracture of the maxilla, above the
teeth, separating the upper jaw from the midface.
Does NOT involve the zygomatic arch.
🧠 Memory Tip: "Le Fort One is Low."
🅱 Le Fort II (Pyramidal Fracture)
Definition: A pyramidal-shaped fracture through the nasal
bridge, maxilla, and orbital floor.
Midface mobility but zygoma not involved.
🧠 Memory Tip: "Le Fort Two is Through the Bridge."
🅲 Le Fort III (Craniofacial Disjunction)
Definition: A fracture that separates the entire facial skeleton
from the skull base.
Involves the zygomatic arch, orbits, and nasal bridge.
🧠 Memory Tip: "Le Fort Three is Free (face detaches from
skull)."
🅳 Tripod Fracture (Zygomaticomaxillary
Complex Fracture) Definition: Involves three fracture points of the zygomatic
bone:
Zygomatic arch
Lateral orbital wall
Maxillary sinus wall
🧠 Memory Tip: “Tripod = 3 points of the zygoma”
CLASS FRACTURE KEY Key Takeaway
Le Fort I–III = midface fractures classified by height and
involvement.
Tripod fracture = fracture of the zygomatic bone, not part of
Le Fort system.
AUTOGRAFT Osteoconductive 🏗 = Provides a scaffold for bone to grow
on
Osteoinductive 🔔 = Stimulates stem cells to become bone-
forming cells
Osteogenic 🌱 = Contains living cells (osteoblasts) that form
bone directly
and CORRECT Answers
2. Pell & Gregory - Depth Classification (A, ClassDescriptionMemory Tip
B, C) A=Crown level with occlusal plane"A = At level
"B=Crown below occlusal but above CEJ of 2nd molar"B =
Below surface
"C=Crown is beneath CEJ of 2nd molar"C = Covered deep"
3. Pell & Gregory – Ramus Classification (I, I Enough space for 3rd molar"I = Ideal
II, III)
How much room is between 2nd molar and II Partial space (half covered by ramus)"II = In between
anterior border of the ramus.
III Fully embedded in ramus (no space)"III = Inside the bone"
Each of the following is true about the Natural teeth have Sharpey’s fibers from the periodontal
connective tissue attachment surrounding ligament that insert directly into the cementum and alveolar
an implant EXCEPT one. Which is the bone.
EXCEPTION?
Dental implants DO NOT have a periodontal ligament.
Instead, implants are surrounded by parallel-oriented
collagen fibers that do not insert into the titanium surface.
, 🦷 Top 3 Reasons to Extract Wisdom Teeth
Impaction Tooth can't fully erupt due to lack of space
Can lead to pain, infection, or damage to nearby teeth
Pericoronitis
Inflammation/infection of gum flap over a partially erupted
tooth
Common in lower 3rd molars
Caries or Resorption
Difficult to clean → decay or resorption of adjacent 2nd molar
🅰 Le Fort I (Horizontal Fracture)
Definition: A horizontal fracture of the maxilla, above the
teeth, separating the upper jaw from the midface.
Does NOT involve the zygomatic arch.
🧠 Memory Tip: "Le Fort One is Low."
🅱 Le Fort II (Pyramidal Fracture)
Definition: A pyramidal-shaped fracture through the nasal
bridge, maxilla, and orbital floor.
Midface mobility but zygoma not involved.
🧠 Memory Tip: "Le Fort Two is Through the Bridge."
🅲 Le Fort III (Craniofacial Disjunction)
Definition: A fracture that separates the entire facial skeleton
from the skull base.
Involves the zygomatic arch, orbits, and nasal bridge.
🧠 Memory Tip: "Le Fort Three is Free (face detaches from
skull)."
🅳 Tripod Fracture (Zygomaticomaxillary
Complex Fracture) Definition: Involves three fracture points of the zygomatic
bone:
Zygomatic arch
Lateral orbital wall
Maxillary sinus wall
🧠 Memory Tip: “Tripod = 3 points of the zygoma”
CLASS FRACTURE KEY Key Takeaway
Le Fort I–III = midface fractures classified by height and
involvement.
Tripod fracture = fracture of the zygomatic bone, not part of
Le Fort system.
AUTOGRAFT Osteoconductive 🏗 = Provides a scaffold for bone to grow
on
Osteoinductive 🔔 = Stimulates stem cells to become bone-
forming cells
Osteogenic 🌱 = Contains living cells (osteoblasts) that form
bone directly
