6: Parotid Bed and Gland

CHAPTER 6

PAROTID BED AND GLAND

Overview and Topographic Anatomy

Recess of the Parotid Bed

Contents of the Parotid Bed

Clinical Correlates

Questions

Overview and Topographic Anatomy

GENERAL INFORMATION

The largest of all the major salivary glands

Entirely serous in secretion

Pyramidal in shape, with up to 5 processes (or extensions)

The gland’s capsule is from the deep cervical fascia

ANATOMIC LANDMARKS

Approximately 75% or more of the parotid gland overlies the masseter muscle; the rest is retromandibular

Facial nerve enters the parotid fossa by passing between the stylohyoid muscle and the posterior belly of the digastric muscle, then splits the gland into a superficial lobe and a deep lobe that are connected by an isthmus

Deep lobe lies adjacent to the lateral pharyngeal space

Transverse facial artery parallels the parotid duct slightly superior to the duct

Buccal and zygomatic branches of the facial nerve form an anastomosing loop superficial to the parotid duct

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Recess of the Parotid Bed

BORDERS AND STRUCTURES

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Contents of the Parotid Bed

MAJOR STRUCTURES

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VASCULAR SUPPLY

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NERVE SUPPLY

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Clinical Correlate

BELL’S PALSY

Unilateral facial paralysis from facial nerve (cranial nerve VII) damage

CAUSES

Approximately 80% of cases have unclear etiology

Evidence suggests herpes simplex virus (HSV-1) infection is a cause

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Jan 5, 2015 | Posted by in General Dentistry | Comments Off on 6: Parotid Bed and Gland
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