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Related Concept Videos

Cranial Bones: Lateral View01:27

Cranial Bones: Lateral View

6.8K
The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
6.8K
Nose and Nasal Cavity01:24

Nose and Nasal Cavity

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The nose is composed of an observable exterior segment (external nose) and an internal segment within the skull known as the nasal cavity (internal nose). The external nose, visible on the face, consists of a framework of bone and hyaline cartilage enveloped in skin and muscle and lined with a mucous membrane. This structure is supported by the frontal bone, nasal bones, and maxillary bone and is supplemented by a cartilaginous framework comprising the septal nasal cartilage, lateral nasal...
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Epistaxis01:30

Epistaxis

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Epistaxis, or nosebleeds, occurs when small, swollen blood vessels in the nasal mucous membrane rupture. Typically, the anterior septum is the primary site of occurrence.
Etiology
Possible causes of this condition include high blood pressure, trauma, low humidity, upper respiratory tract infections, allergies, foreign bodies, nasal inhalation of corticosteroids or illicit drugs, excessive use of decongestant nasal sprays, facial or nasal surgery, anatomic malformation, tumors, or systemic...
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Overview of the Skull01:08

Overview of the Skull

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The cranium (skull) is the skeletal structure of the head that supports the face and protects the brain. It is subdivided into the facial bones and the brain case, or cranial vault. The facial bones underlie the facial structures, form the nasal cavity, enclose the eyeballs, and support the teeth of the upper and lower jaws.
The cranial vault surrounds and protects the brain and houses the middle and inner ear structures. This cavity is bounded superiorly by the rounded top of the skull, which...
12.1K
Fractures: Bone Repair01:27

Fractures: Bone Repair

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Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
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Author Spotlight: Development of a Novel Finite Element Analysis Model for Improved Orthognathic Surgical Techniques
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Nasal Fracture During Maxillary Expansion-A Rare Complication?

Katharina Obermeier1, Wenko Smolka1, Philipp Poxleitner1

  • 1Department of Oral and Maxillofacial Surgery, LMU University Hospital, Ludwig Maximilian University of Munich, 80337 Munich, Germany.

Reports (MDPI)
|April 24, 2026
PubMed
Summary

Maxillary expansion (ME) using a hyrax screw can rarely cause nasal bone fractures in children. This case report details a successful conservative treatment involving reversing the screw to heal the fracture.

Area of Science:

  • Orthodontics
  • Pediatric Dentistry
  • Craniofacial Surgery

Background:

  • Maxillary expansion (ME) is a common orthodontic procedure.
Keywords:
childcone-beam computed tomographymaxillary expansionnasal bone fractureorthodontic appliancesremovable

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  • Tooth-supported maxillary expanders with hyrax screws are frequently used.
  • Unusual complications, though rare, require careful consideration.