CAISS PRACTICE PAPER 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◉Nasal Bones & Septum, Maxillary Sinuses, Orbital Bones, Zygoma,
Zygomatic Arch, Maxilla, Alveloar Process & Maxillary Dentition.
Answer: Fractures of middle third of face
◉Mandibular Dentition, Alveolar Process,
Symphysis/Parasymphysis, Corpus or Body, Angle, Ramus, Condyle
& Coronoid Process. Answer: Fractures of lower third of face
◉LeFort I Fracture. Answer: (Tranverse, horizontal maxillary
alveolar fractures, Palate-facial disjunction (Guerin fracture)), occurs
through the lower maxilla into the nasal cavity including the
maxiallary alveolar process, portion of the maxillary sinus, the hard
palate and the lower aspect of the pterygoid plates. Fracture
detaches the tooth-bearing portion from the rest of the maxilla with
one fracture line.
◉LeFort II Fracture. Answer: (Pyramidal Disjunction) Fracture line
passes through the nasal bone, lacrimal bone, floor of orbit,
infraorbital margin, across the upper portion of the zygomatic-
,maxillary suture line and maxillary sinus and pterygoid plate along
the lateral wall fo teh maxilla into the ptergopalatine fossa. Two
fracture lines result in a floating maxilla and nose with a possible
cribiform plate fracture.
◉LeFort III Fracture. Answer: (Craniofacial disjunction), Complete
separation of the facial bones (three fracture lines) from their
cranial attachments creating the most complex of all facial fractures.
Fracture passes through the nasofrontal suture, the junction of the
ethmoid and frontal bone, the superior orbital fissure, lateral wall of
the orbit, zygomaticofrontal and temporal suture, with a high
fracture of the ptergoid plate producing a dish face deformity that is
difficult to correct secondarily.
◉(T/F) Bilateral injuries should be coded separately except where
specifically noted in the dictionary.. Answer: T
◉Eye Avulsion. Answer: Traumatic enucleation of the eye
◉(T/F) Alveolar ridge fracture, including injury to teeth, is coded as
a single injury.. Answer: T
◉(T/F) Bilateral fractures to the maxilla or mandible are coded as
single injuries with location assigned to the fracture located in the
largest mass area of the bone.. Answer: T
, ◉(T/F) Nose fractures that accompany a LeFort I fracture should
not be coded as a separate injury.. Answer: F
◉(T/F) Nose fractures that accompany Lefort II and II fractures are,
by definition, included in the LeFort fracture and therefore are not
coded separately.. Answer: T
◉(T/F) Facial fractures must be significantly displaced to be coded
as "displaced".. Answer: T
◉(T/F) Minimal displacement facial fractures should be coded as
displaced fracture.. Answer: F
◉Panfacial Fracture. Answer: Multiple and complex fractures that
may involve the middle and lower face, upper and middle face or all
these locations but are not LeFort fractures.
◉(T/F) You do not have to have a fracture line running through eh
ptergoid plates to have a LeFort fractures.. Answer: F
◉(T/F) The trachea and esophagus below the sternal notch are
considered part of the AIS Chest region.. Answer: T
WITH SOLUTIONS GRADED A+
◉Nasal Bones & Septum, Maxillary Sinuses, Orbital Bones, Zygoma,
Zygomatic Arch, Maxilla, Alveloar Process & Maxillary Dentition.
Answer: Fractures of middle third of face
◉Mandibular Dentition, Alveolar Process,
Symphysis/Parasymphysis, Corpus or Body, Angle, Ramus, Condyle
& Coronoid Process. Answer: Fractures of lower third of face
◉LeFort I Fracture. Answer: (Tranverse, horizontal maxillary
alveolar fractures, Palate-facial disjunction (Guerin fracture)), occurs
through the lower maxilla into the nasal cavity including the
maxiallary alveolar process, portion of the maxillary sinus, the hard
palate and the lower aspect of the pterygoid plates. Fracture
detaches the tooth-bearing portion from the rest of the maxilla with
one fracture line.
◉LeFort II Fracture. Answer: (Pyramidal Disjunction) Fracture line
passes through the nasal bone, lacrimal bone, floor of orbit,
infraorbital margin, across the upper portion of the zygomatic-
,maxillary suture line and maxillary sinus and pterygoid plate along
the lateral wall fo teh maxilla into the ptergopalatine fossa. Two
fracture lines result in a floating maxilla and nose with a possible
cribiform plate fracture.
◉LeFort III Fracture. Answer: (Craniofacial disjunction), Complete
separation of the facial bones (three fracture lines) from their
cranial attachments creating the most complex of all facial fractures.
Fracture passes through the nasofrontal suture, the junction of the
ethmoid and frontal bone, the superior orbital fissure, lateral wall of
the orbit, zygomaticofrontal and temporal suture, with a high
fracture of the ptergoid plate producing a dish face deformity that is
difficult to correct secondarily.
◉(T/F) Bilateral injuries should be coded separately except where
specifically noted in the dictionary.. Answer: T
◉Eye Avulsion. Answer: Traumatic enucleation of the eye
◉(T/F) Alveolar ridge fracture, including injury to teeth, is coded as
a single injury.. Answer: T
◉(T/F) Bilateral fractures to the maxilla or mandible are coded as
single injuries with location assigned to the fracture located in the
largest mass area of the bone.. Answer: T
, ◉(T/F) Nose fractures that accompany a LeFort I fracture should
not be coded as a separate injury.. Answer: F
◉(T/F) Nose fractures that accompany Lefort II and II fractures are,
by definition, included in the LeFort fracture and therefore are not
coded separately.. Answer: T
◉(T/F) Facial fractures must be significantly displaced to be coded
as "displaced".. Answer: T
◉(T/F) Minimal displacement facial fractures should be coded as
displaced fracture.. Answer: F
◉Panfacial Fracture. Answer: Multiple and complex fractures that
may involve the middle and lower face, upper and middle face or all
these locations but are not LeFort fractures.
◉(T/F) You do not have to have a fracture line running through eh
ptergoid plates to have a LeFort fractures.. Answer: F
◉(T/F) The trachea and esophagus below the sternal notch are
considered part of the AIS Chest region.. Answer: T
