science

Pterygomandibular space

Pterygomandibular space is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Pterygomandibular space rather than just read about it. In short: The pterygomandibular space is a fascial space of the head and neck (sometimes also termed fascial spaces or tissue spaces). It is a potential space in the head and is paired on each side.

Key takeaways

Pterygomandibular space belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Pterygomandibular space to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Pterygomandibular space from memory before moving on to harder problems.

Reference excerpt

The pterygomandibular space is a fascial space of the head and neck (sometimes also termed fascial spaces or tissue spaces). It is a potential space in the head and is paired on each side. It is located between the medial pterygoid muscle and the medial surface of the ramus of the mandible. The pterygomandibular space is one of the four compartments of the masticator space.

Location and structure

Anatomic boundaries The boundaries of each pterygomandibular space are:

the posterior border of the buccal space anteriorly the parotid gland posteriorly the lateral pterygoid muscle superiorly the inferior border of the mandible (lingual surface) inferiorly the medial pterygoid muscle medially (the space is superficial to medial pterygoid) the ascending ramus of the mandible laterally (the space is deep to the ramus of the mandible)

Communications The communications of each pterygomandibular space are:

to the buccal space anteriorly to the lateral pharyngeal space and peritonsillar space medially (around the medial pterygoid muscle). to the submasseteric space laterally (around the ramus of the mandible) to the parotid space posteriorly to the deep temporal/infratemporal space superiorly

Contents In health, the space contains:

the mandibular division of the trigeminal nerve, the inferior alveolar artery and vein, the sphenomandibular ligament.

Clinical relevance 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. Rarely, pathogenic micro-organisms from the mouth may be seeded into the pterygomandibular space during this injection and cause a needle tract infection of the space. It is also occasionally reported that the needle breaks off and is retained in the pterygomandibular space during this injection. Minor oral surgery is then required to remove the fractured needle. Due to its high vascularity, injections into the pterygomandibular space carry a high risk of intravascular injection (injecting into a blood vessel). Another possible complication of an inferior alveolar nerve block occurs when the needle is placed too deep, passing through the pterygomandibular space and into the parotid gland behind. Branches of the facial nerve (which gives the motor supply to the muscles of facial expression) run through the substance of the parotid gland and so this is manifest as a transient facial palsy. The pterygomandibular space is one of the possible spaces into which a tooth may be displaced into during dental extraction, e.g. of a maxillary wisdom tooth. A mandibular fracture in the angle region may also be the cause of a pterygomandibular space infection. The signs and symptoms of an isolated pterygomandiublar infection may include trismus (difficulty opening the mouth), however there is not usually any externally visible facial swelling. Intra-orally, there may be swelling and erythema (redness) of the anterior tonsillar pillar (the Palatoglossal arch) and deviation of the uvula to the unaffected side. The airway may be compressed. Treatment is by surgical incision and drainage, and the incision may be placed inside the mouth or two incisions may be used, one inside the mouth and one outside.

Odontogenic infections Odontogenic infections may spread to involve the pterygomandibular space, and the most common teeth responsible for this are the mandibular second and third molar teeth.

References

Illustrations

Worked examples

Example 1 — a first encounter with Pterygomandibular space

Start with the simplest possible case. Write down what Pterygomandibular space claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Pterygomandibular space before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Pterygomandibular space ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Pterygomandibular space

In research: Pterygomandibular space appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Pterygomandibular space in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Pterygomandibular space is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fascial spaces of the head and neck, Mouth, Oral and maxillofacial surgery, so understanding it makes those chapters shorter.
In everyday life: Look for Pterygomandibular space outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Pterygomandibular space” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Pterygomandibular space in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Pterygomandibular space means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Pterygomandibular space out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pterygomandibular space in simple terms?

The pterygomandibular space is a fascial space of the head and neck (sometimes also termed fascial spaces or tissue spaces). It is a potential space in the head and is paired on each side.

Why does Pterygomandibular space matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Pterygomandibular space?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Pterygomandibular space.