Masticator space. The masticator space is
situated laterally to the medial pterygoid fascia and medially to the masseter muscle
. It is bounded by the sphenoid bone, the posterior aspect of the mandible, and the zygomatic arch. It lies inferiorly to the temporal space and is anterolateral to the parapharyngeal space.
What is Masseteric space infection?
1 The superficial masticator space is often referred to as the masseteric space. Infections of the masseteric space are more com
monly part of a larger infection of the entire masticator space
. The etiology is usually dental, and the infection may begin either medial or lateral to the mandibular ramus.
What are Pterygoids?
The pterygoid muscles are
two of the four muscles of mastication
, located in the infratemporal fossa of the skull. These muscles are: lateral pterygoid and medial pterygoid. The primary function of the pterygoid muscles is to produce movements of the mandible at the temporomandibular joint.
What is masseter abscess?
Submasseteric abscess is
a localized, often chronic, infection between the masseter and the mandible
. This location is normally only a potential space but provides a protected space for the development of an occult abscess.
What is Pterygomandibular space?
The pterygomandibular space (PM) is
a space largely composed of connective tissue and muscle but also contains several neurovascular structures
. It is triangular in shape and is bounded by the medial surface of the mandibular ramus laterally.
What is space infection?
Submandibular space infection is
acute cellulitis of the soft tissues below the mouth
. Symptoms include pain, dysphagia, and potentially fatal airway obstruction. Diagnosis usually is clinical. Treatment includes airway management, surgical drainage, and IV antibiotics.
What is buccal space?
The buccal spaces are
paired fat-containing spaces on each side of the face forming cheeks
. Each space is enveloped by the superficial (investing) layer of the deep cervical fascia. It is located between the buccinator and platysma muscles, therefore it is only a small potential space with limited contents.
Why is it called pterygoid?
In many mammals it remains as a separate bone called the pterygoid bone. Its name is
Greek for “resembling a fin or wing”
, from its shape.
Which muscle helps to open the jaw?
The masseter muscle is one of four muscles of mastication and has the primary role of closing the jaw in conjunction with two other jaw closing muscles, the temporalis and medial pterygoid muscles. The fourth masticatory muscle,
the lateral pterygoid
, causes jaw protrusion and jaw opening when activated.
Where is pterygoid process?
Each pterygoid process projects
inferiorly from the junction of the body and greater wing of the sphenoid bone
and bifurcates into a medial pterygoid plate and a lateral pterygoid plate. At the inferior tip of the medial pterygoid plate is the small hook-shaped process, the pterygoid hamulus.
What is Submasseteric abscess?
Submasseteric abscess is
a rare abscess
which is often misdiagnosed as a parotid abscess or parotitis. Only a few cases have been reported. The cause is mostly dental in origin. Intravenous antibiotics often fail to alleviate the symptoms as this is a closed space and needs prompt drainage.
What is masseteric notch?
Just buccal to the crest of the mandibular ridge in the distal-buccal corner of the arch
is an area known as the masseteric notch.
What nerve supplies the masseter muscle?
The masseter is primarily responsible for the elevation of the mandible and some protraction of the mandible. It receives its motor innervation from
the mandibular division of the trigeminal nerve
. The blood supply is primarily from the masseteric artery, a branch of the internal maxillary artery.
What does the Pterygomandibular space contain?
General anatomy of the pterygomandibular space
Of particular importance to local anaesthesia, the pterygomandibular space contains
the IAN, artery and vein, the lingual nerve (LN), the nerve to mylohyoid, the sphenomandibular ligament and fascia
(Fig 1).
Which two nerves blocked when injection is given in Pterygomandibular space?
The pterygomandibular space is the area where local anesthetic solution is deposited during
an inferior alveolar nerve block
, a common procedure used to anesthetize the distribution of the inferior alveolar nerve.
How is pterygomandibular raphe formed?
It is formed by
the union of the tendinous ends of the superior constrictor of the pharynx and buccinator muscles
.
