Mandible dislocation: Difference between revisions
m (Mholtz moved page Mandibular dislocation to Mandible dislocation) |
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==Clinical Features== | ==Clinical Features== | ||
*Inability to close mouth | |||
*Difficulty speaking or swallowing | *Difficulty speaking or swallowing | ||
*Malocclusion | *Malocclusion | ||
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*Prominent-appearing lower jaw | *Prominent-appearing lower jaw | ||
*Preauricular depression | *Preauricular depression | ||
*Condylar head palpable in the temporal space (in lateral dislocation) | |||
===Posterior Dislocation=== | ===Posterior Dislocation=== | ||
*Must examine the external auditory canal | *Must examine the external auditory canal | ||
==Differential Diagnosis== | ==Differential Diagnosis== | ||
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==Evaluation== | ==Evaluation== | ||
*Generally a clinical diagnosis | |||
*For traumatic etiology, obtain CT face to evaluate for fracture | |||
**Also obtain CT IAC if concern for posterior dislocation | |||
*Examine external auditory canal, especially in posterior dislocation | |||
*Evaluate the cranial nerves to rule out concomitant injury | |||
== | ==Management== | ||
* | *Closed reduction in the emergency department (if no concern for fracture) | ||
**If dislocation is bilateral, may be easier to relocate one side at a time. | |||
*Pain control or anxiolysis | |||
**Consider local analgesia - inject local anesthetic into the preauricular depression just anterior to the tragus. | |||
*Consider procedural sedation | |||
===Wrist Pivot Method<ref>Lowery LE, Beeson MS, Lum KK. The wrist pivot method, a novel technique for temporomandibular joint reduction. J Emerg Med. 2004 Aug;27(2):167-70. http://www.ncbi.nlm.nih.gov/pubmed/15261360</ref>=== | ===Wrist Pivot Method<ref>Lowery LE, Beeson MS, Lum KK. The wrist pivot method, a novel technique for temporomandibular joint reduction. J Emerg Med. 2004 Aug;27(2):167-70. http://www.ncbi.nlm.nih.gov/pubmed/15261360</ref>=== | ||
[[File:wrist-pivot-method.jpg|thumbnail]] | [[File:wrist-pivot-method.jpg|thumbnail]] | ||
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*Apply cephalad force with the thumbs and caudad pressure with the fingers | *Apply cephalad force with the thumbs and caudad pressure with the fingers | ||
*Then pivot your wrists. | *Then pivot your wrists. | ||
*Note: This is a more physiologic reduction technique for the provider, allowing greater and more sustained force to be exerted. | |||
Note: This is a more physiologic reduction technique for the provider, allowing greater and more sustained force to be exerted. | |||
===Older "Traditional" Technique=== | ===Older "Traditional" Technique=== | ||
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*Placed gloved thumbs in patient's mouth over the occlusal surfaces of the molars, or lateral to patient's molars in buccal fold (to avoid being bitten) | *Placed gloved thumbs in patient's mouth over the occlusal surfaces of the molars, or lateral to patient's molars in buccal fold (to avoid being bitten) | ||
*Apply pressure downward (toward the feet) and then backward (posteriorly) | *Apply pressure downward (toward the feet) and then backward (posteriorly) | ||
==Disposition== | ==Disposition== | ||
*Generally may be discharged if uncomplicated and successfully reduced | |||
*Open dislocation | **Instruct patient to use soft diet, not to open mouth wider than 2cm for 2 weeks, and to support mouth when yawning | ||
*Superior dislocation | *Admit for: | ||
* | **Open dislocation | ||
*Nerve injury | **Superior dislocation | ||
*Inability to reduce | **Fracture | ||
**Nerve injury | |||
**Inability to reduce | |||
==References== | ==References== |
Revision as of 01:26, 25 February 2019
Background
Anterior Dislocation
- Most common
- Mandibular condyle is forced in front of the articular eminence
- Risk factors: Prior dislocation, weak capsule, torn ligaments
- Often occurs spontaneously while patient is yawning, "popping" ears, or laughing
Posterior Dislocation
- Follows a blow to the mandible that may or may not break the condylar neck
- Condylar head may prolapse into the external auditory canal
Lateral Dislocation
- Often associated with mandibular fracture
Superior Dislocation
- Occur from blow to the partially opened mouth
- Associated with cerebral contusions, facial nerve palsy, deafness
Clinical Features
- Inability to close mouth
- Difficulty speaking or swallowing
- Malocclusion
- Pain localized anterior to the tragus
- Prominent-appearing lower jaw
- Preauricular depression
- Condylar head palpable in the temporal space (in lateral dislocation)
Posterior Dislocation
- Must examine the external auditory canal
Differential Diagnosis
Jaw Spasms
- Acute tetanus
- Akathisia
- Conversion disorder
- Drug toxicity (anticholinergic, phenytoin, valproate, carbamazepine)
- Dystonic reaction
- Electrolyte abnormality
- Hypocalcemic tetany
- Magnesium
- Mandible dislocation
- Meningitis
- Peritonsillar abscess
- Rabies
- Seizure
- Strychnine poisoning
- Stroke
- Temporomandibular disorder
- Torticollis
Evaluation
- Generally a clinical diagnosis
- For traumatic etiology, obtain CT face to evaluate for fracture
- Also obtain CT IAC if concern for posterior dislocation
- Examine external auditory canal, especially in posterior dislocation
- Evaluate the cranial nerves to rule out concomitant injury
Management
- Closed reduction in the emergency department (if no concern for fracture)
- If dislocation is bilateral, may be easier to relocate one side at a time.
- Pain control or anxiolysis
- Consider local analgesia - inject local anesthetic into the preauricular depression just anterior to the tragus.
- Consider procedural sedation
Wrist Pivot Method[1]
- Place patient in seated position
- While facing the patient, grasp the mandible with your thumbs at the apex of the mentum and fingers on the occlusal surface of the inferior molars.
- Apply cephalad force with the thumbs and caudad pressure with the fingers
- Then pivot your wrists.
- Note: This is a more physiologic reduction technique for the provider, allowing greater and more sustained force to be exerted.
Older "Traditional" Technique
- Place patient in seated position (anterior approach) or supine (posterior approach)
- Advisable to wrap thumbs in gauze to guard against accidental bite
- Placed gloved thumbs in patient's mouth over the occlusal surfaces of the molars, or lateral to patient's molars in buccal fold (to avoid being bitten)
- Apply pressure downward (toward the feet) and then backward (posteriorly)
Disposition
- Generally may be discharged if uncomplicated and successfully reduced
- Instruct patient to use soft diet, not to open mouth wider than 2cm for 2 weeks, and to support mouth when yawning
- Admit for:
- Open dislocation
- Superior dislocation
- Fracture
- Nerve injury
- Inability to reduce
References
- ↑ Lowery LE, Beeson MS, Lum KK. The wrist pivot method, a novel technique for temporomandibular joint reduction. J Emerg Med. 2004 Aug;27(2):167-70. http://www.ncbi.nlm.nih.gov/pubmed/15261360