the first paranasal sinus that develop embryonically and begin in the third month of fetal development
maxillary sinus
the maxillary sinus expands by?
pneumatization
- extends anteriorly and inferiorly from the base of the skull closely matching the growth rate of the maxilla and the development of the dentition
the largest paranasal sinus
maxillary sinus aka antrum of highmore
a fracture involving incomplete fractures with flexible bone.
generally exhibit minimal mobility when
palpated and the fracture is incomplete
greenstick fracture
is a complete transection of the bone with minimal fragmentation at
the fracture site.
simple fracture
the fractured bone is
left in multiple segments
comminuted fracture
examples of comminuted fracture
gunshot wounds, penetrating objects, other high impact injuries
results in communication of the margin of the fractured bone with the external environ
ment
compound fracture
Fractures of the mandible could be favorable or unfavorable, depending on the angulation
the fracture line and the muscle pull resist displacement of the fracture
favorable fracture
Fractures of the mandible could be favorable or unfavorable, depending on the angulation
the muscle pull results in displacement of the fractured segments.
unfavorable fracture
midline fracture that frequently results from the application of horizontal force to the maxilla, which fractures the maxilla
through the maxillary sinus and along the floor of the nose.
The fracture separates the maxilla from the pterygoid plates and nasal
and zygomatic structures
Le Fort 1
fracture separating inferior portion of maxilla in horizontal fashion, extending from piriform aperture of nose to pterygoid maxillary suture area
Le Fort 1
fracture involving separation of maxilla and nasal complex from cranial base, zygomatic orbital rim area, and pterygoid maxillary suture area
Le Fort 2
which is a complete separation of midface at level of naso-orbital-ethmoid complex and zygomaticofrontal suture area.
the fracture also extends through orbits bilaterally.
Le Fort 3
the most common type of midfacial fracture
zygomatic complex fracture
This type of fracture results when an object such as a fist or a baseball strikes the lateral aspect of the cheek.
Similar trauma can also result in isolated fractures of the nasal bones, the orbital
rim, or the orbital floor areas.
zygomatic complex fracture
anatomic distribution of mandibular fractures
condylar 29.1%
Angle of mandible 24.5%
Symphysis 22%
Body of mandible 16%
Alveolar process 3.1%
ramus 1.7%
coronoid 1.3%
Three buttresses exist bilaterally
that form the primary vertical supports of the face
nasomaxillary
zygomatic
pterygomaxillary
Establishing a proper occlusal relationship by wiring teeth together is termed
maxillomandibular fixation
or
intermaxillary fixation
The most common technique of MMF is the use of
prefabricated arch bar that is adapted and circumdentally wired to teeth or acid-etch bonded in each arch
treatment of only using MMF is called
closed reduction
In the case of a fracture of an edentulous patient, the mandibular
dentures can be wired to the mandible with?
circum-mandibular wiring
