Maxillofacial Infections - Yolaclinicaljude.yolasite.com/resources/Maxillofacial infections.pdf ·...

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Maxillofacial Infections Dr Hazem Al-Ahmad B.D.S, MSc(Lon), F.D.S.R.C.S(Eng)

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Maxillofacial Infections

Dr Hazem Al-AhmadB.D.S, MSc(Lon), F.D.S.R.C.S(Eng)

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Maxillofacial Infections

• Odontogenic infections are usually mildand treated by antibiotics

• A vestibular or a fascial space abcess isdetermined by the muscle attachmentlevel to the point of infection perforation

• Odontogenic infections are usually mildand treated by antibiotics

• A vestibular or a fascial space abcess isdetermined by the muscle attachmentlevel to the point of infection perforation

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Microbiology

• concentration of the organism• its virulence• environmental factors• host defense

• concentration of the organism• its virulence• environmental factors• host defense

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Steps in the management ofodontogenic infections:

• Determine the severity of infection.• Evaluate host defenses.• Decide on the setting of care• Treat surgically.• Support medically• Choose and prescribe antibiotic therapy• Administer the antibiotic properly• Evaluate the patient frequently.

• Determine the severity of infection.• Evaluate host defenses.• Decide on the setting of care• Treat surgically.• Support medically• Choose and prescribe antibiotic therapy• Administer the antibiotic properly• Evaluate the patient frequently.

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Severity of infection:

• Anatomic location• Rate of progression,• Airway compromise.

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Anatomy

Infections spread along the "path of leastresistance".

Infections spread along the "path of leastresistance".

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Fascial Spaces

Bound by the fascial layers investing musclesof the bodycontain various structuresare potential spaces

Bound by the fascial layers investing musclesof the bodycontain various structuresare potential spaces

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Fascial Spaces

Primary involvement spaces:Maxilla: canine, buccal, infratemporalMandible: Submandibular, Sublingual, Submental

Secondary spaces:Masseteric, pterygomandibular, superficial and deeptemporal, Lateral pharyngeal, Retropharyngeal,prevertebral

Primary involvement spaces:Maxilla: canine, buccal, infratemporalMandible: Submandibular, Sublingual, Submental

Secondary spaces:Masseteric, pterygomandibular, superficial and deeptemporal, Lateral pharyngeal, Retropharyngeal,prevertebral

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Canine Space

• Sup Origin of levator muscles• Inf Orbicularis oris• Ant Skin, subQ• Post Maxilla• Med Levator labii alaquae nasii• Lat Zygomaticus major

• Sup Origin of levator muscles• Inf Orbicularis oris• Ant Skin, subQ• Post Maxilla• Med Levator labii alaquae nasii• Lat Zygomaticus major

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Canine Space

• Canine root has a sufficient length toerode through the alveolar bone superiorto the muscles of facial expressions.

• Clinically, facial swelling that obliteratesthe nasolabial fold.

• Spontaneous drainage occurs just inferiorto the medial canthal ligament.

• Canine root has a sufficient length toerode through the alveolar bone superiorto the muscles of facial expressions.

• Clinically, facial swelling that obliteratesthe nasolabial fold.

• Spontaneous drainage occurs just inferiorto the medial canthal ligament.

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Canine Space

• Contains angular artery and vein,infraorbital foramen.

• These provide a path of communication tocavernous sinus via ophthalmic vein,leading to cavernous sinusitis and brainabscess.

• This is 2o to the fact that facial veinscontain no valves.

• Contains angular artery and vein,infraorbital foramen.

• These provide a path of communication tocavernous sinus via ophthalmic vein,leading to cavernous sinusitis and brainabscess.

• This is 2o to the fact that facial veinscontain no valves.

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Cavernous Sinusitis

• Cavernous sinus contains; CN III, IV, V1,V2, VI and internal carotid artery.

• Valveless veins of head and neck result ina "venous lake" throughout the midfaceand skull base.

• This will result in retrograde flowdependent on pressure gradient

• Cavernous sinus contains; CN III, IV, V1,V2, VI and internal carotid artery.

• Valveless veins of head and neck result ina "venous lake" throughout the midfaceand skull base.

• This will result in retrograde flowdependent on pressure gradient

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Cavernous Sinusitis

infection may spread from midface tocavernous sinus and other parts of brainvia sup. and inf. ophthalmic veins, oremissary veins connecting pterygoidplexus through ovale and lacerumforamina to the cranial vault.

infection may spread from midface tocavernous sinus and other parts of brainvia sup. and inf. ophthalmic veins, oremissary veins connecting pterygoidplexus through ovale and lacerumforamina to the cranial vault.

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Cavernous Sinusitis

• Earliest sign is lat gaze palsy 2o pressureon CN VI, since it is not covered byperiosteum.

• Other signs include; nausea, vomiting,diplopia, visual impairment,ophthalmoplegia, photophobia,papilledema .

• Earliest sign is lat gaze palsy 2o pressureon CN VI, since it is not covered byperiosteum.

• Other signs include; nausea, vomiting,diplopia, visual impairment,ophthalmoplegia, photophobia,papilledema .

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Buccal Space

• Sup Zygoma• Inf Inferior

border ofmandible

• Ant Modiolus• Post Masseter• Med Buccinator• Lat Skin, subQ

• Sup Zygoma• Inf Inferior

border ofmandible

• Ant Modiolus• Post Masseter• Med Buccinator• Lat Skin, subQ

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Buccal Space

• Infection frommaxillary ormandibular teeth(mainlymaxillary)

• Infection frommaxillary ormandibular teeth(mainlymaxillary)

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Buccal Space

• Contains facial artery, vein, and nerve;Stenson’s duct, buccal fat pad.

• The buccal fat pad acts as an impedimentfor spread of infection from buccal tolateral pharyngeal space.

• Contains facial artery, vein, and nerve;Stenson’s duct, buccal fat pad.

• The buccal fat pad acts as an impedimentfor spread of infection from buccal tolateral pharyngeal space.

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Buccal Space

• Clinically: swelling below zygomatic archand above inferior border of mandible.

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Infratemporal Space

lies posterior to themaxilla rarely infected, cause

is usually from themaxillary third molar

lies posterior to themaxilla rarely infected, cause

is usually from themaxillary third molar

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Infratemporal Space

Sup Infratemporal crestof sphenoid bone

Inf Lateral pterygoid Ant Maxillary tuberosity Post Mandibular condyle Med Lateral pterygoid

plate Lat Coronoid process

Sup Infratemporal crestof sphenoid bone

Inf Lateral pterygoid Ant Maxillary tuberosity Post Mandibular condyle Med Lateral pterygoid

plate Lat Coronoid process

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Mandibular spaces

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Submental Space

Sup Mylohyoid Inf Skin, subQ Ant Lingual mandible Post HyoidMed Common space,

no medial wall Lat Medial Mandible

Sup Mylohyoid Inf Skin, subQ Ant Lingual mandible Post HyoidMed Common space,

no medial wall Lat Medial Mandible

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Submental Space

Primarily infected bymandibular incisorssufficiently long toerode through labialbone apical to theattachment of thementalis muscle

Primarily infected bymandibular incisorssufficiently long toerode through labialbone apical to theattachment of thementalis muscle

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Submandibular Space

•Sup. Inf Mandible,Mylohyoid•Inf. Hyoid•Ant .Ant .Digastric•Post. Post. Digastric•Med. Mylohyoid,hyoglossus•Lat. Inf. mandible,skin, subQ

•Sup. Inf Mandible,Mylohyoid•Inf. Hyoid•Ant .Ant .Digastric•Post. Post. Digastric•Med. Mylohyoid,hyoglossus•Lat. Inf. mandible,skin, subQ

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Submandibular Space

• Contains submandibular gland, facial andlingual arteries, and lymphatics.

• most common infected space• Lingual perforation of mandibular molars and

may be involved by premolars – but mainlylower third molar

• Infection results in dysphagia, pain, swelling

• Contains submandibular gland, facial andlingual arteries, and lymphatics.

• most common infected space• Lingual perforation of mandibular molars and

may be involved by premolars – but mainlylower third molar

• Infection results in dysphagia, pain, swelling

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Sublingual Space

• Sup Sublingualmucosa

• Inf Mylohyoid• Ant Lingual border

mandible• Post Hyoid• Med Genioglossus• Lat Medial mandible

• Sup Sublingualmucosa

• Inf Mylohyoid• Ant Lingual border

mandible• Post Hyoid• Med Genioglossus• Lat Medial mandible

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Sublingual Space

Contains sublingual gland, lingual nerve, Wharton'sduct, hypoglossal nerve. Lingual perforation of mandibular first molar and

premolars mainly. dysphagia, pain, elevation of the floor of mouth and

sup. displacement of tongue. Open posterior border, therefore communicates

freely with the submandibular space and secondaryspaces.

Contains sublingual gland, lingual nerve, Wharton'sduct, hypoglossal nerve. Lingual perforation of mandibular first molar and

premolars mainly. dysphagia, pain, elevation of the floor of mouth and

sup. displacement of tongue. Open posterior border, therefore communicates

freely with the submandibular space and secondaryspaces.

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Ludwig’s Angina

Infection of 5 spaces; submental, andbilateral submandibular and sublingualspaces.

brauny edema of the spaces. no lymphadenopathy minimal inflammation of pharynx

Infection of 5 spaces; submental, andbilateral submandibular and sublingualspaces.

brauny edema of the spaces. no lymphadenopathy minimal inflammation of pharynx

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Ludwig’s Angina

Severe swelling, elevation of tongue, hardsubmandibular region.

Trismus, drooling of saliva and difficulty withswallowing and breathing.

Can progress rapidly and produce upper airwayobstruction that can lead to death.

Commonly streptococcal infection.

Severe swelling, elevation of tongue, hardsubmandibular region.

Trismus, drooling of saliva and difficulty withswallowing and breathing.

Can progress rapidly and produce upper airwayobstruction that can lead to death.

Commonly streptococcal infection.

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Ludwig’s Angina

Maintanance of airway Manage by vigorous incision and drainage Aggressive antibiotic therapy

Maintanance of airway Manage by vigorous incision and drainage Aggressive antibiotic therapy

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Maxillofacial Infections II

Dr Hazem Al-AhmadB.D.S, MSc(Lon), F.D.S.R.C.S(Eng)

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Submasseteric Space

• Sup Zygomatic arch• Inf Inferior border of

mandible• Ant Parotidomasseteric

fascia• Post Parotid• Med Lateral mandible• Lat Masseter

Infection would lead totrismus,

Communicates withinfratemporal fossa

• Sup Zygomatic arch• Inf Inferior border of

mandible• Ant Parotidomasseteric

fascia• Post Parotid• Med Lateral mandible• Lat Masseter

Infection would lead totrismus,

Communicates withinfratemporal fossa

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Pterygomandibular Space

Sup Lateral pterygoidmuscle

Inf Pterygomassetericsling

Ant Pterygomandibularraphae

Post Parotid Med Medial pterygoid Lat Medial ramus

Sup Lateral pterygoidmuscle

Inf Pterygomassetericsling

Ant Pterygomandibularraphae

Post Parotid Med Medial pterygoid Lat Medial ramus

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Temporal Space

Lat Temporal FasciaMed TemporalisLat Temporal FasciaMed Temporalis

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Cervical fascial spaces

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Lateral Pharyngeal Space

• Spread from infections pterygomandibularspace

• Extends from base of skull at sphenoid boneto the hyoid bone

• Medial to the medial pterygoid muscle andlateral to superior constrictor.

• Anteriorly : pterygomandibular raphe, andposteriomedially to prevertebral fascia

• Spread from infections pterygomandibularspace

• Extends from base of skull at sphenoid boneto the hyoid bone

• Medial to the medial pterygoid muscle andlateral to superior constrictor.

• Anteriorly : pterygomandibular raphe, andposteriomedially to prevertebral fascia

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Lateral Pharyngeal Space

• Severe trismus• Lateral swelling of the neck and

pharyngeal wall• Complications: thrombosis of internal

jugular vein, errosion of carotid artery andbranches, interferences with cranial nervesIX through XII, spread to retrophryngealspace

• Severe trismus• Lateral swelling of the neck and

pharyngeal wall• Complications: thrombosis of internal

jugular vein, errosion of carotid artery andbranches, interferences with cranial nervesIX through XII, spread to retrophryngealspace

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Retrophryngeal space

• Has few contents• Major concern: spread to mediastinum• Involvement of prevertebral space

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Actinomycosis

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Necrotizing Fascitis

• a polymicrobial, mixed bacterial infectionof subq. tissue spreading betweensuperficial and deep cervical fascia.

• Usually as a result of breach in the skin,and is associated with an underlyingcondition compromising the hostimmunity.

• a polymicrobial, mixed bacterial infectionof subq. tissue spreading betweensuperficial and deep cervical fascia.

• Usually as a result of breach in the skin,and is associated with an underlyingcondition compromising the hostimmunity.

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Radiography

PeriapicalPanoramicPlain filmCT scanUltrasonography

PeriapicalPanoramicPlain filmCT scanUltrasonography

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Treatment• Once diagnosis of infection is established, the principles

of treatment are common.• ABC’s first,• secure and maintain a patent, functional airway, and IV

access for fluids and medications.• In case of respiratory distress or embarrassment,

intubation should be strongly considered.• Fiberoptic intubation or surgical airway, "cric" or "trach"

may be necessary if edema has distorted the anatomy

• Once diagnosis of infection is established, the principlesof treatment are common.

• ABC’s first,• secure and maintain a patent, functional airway, and IV

access for fluids and medications.• In case of respiratory distress or embarrassment,

intubation should be strongly considered.• Fiberoptic intubation or surgical airway, "cric" or "trach"

may be necessary if edema has distorted the anatomy

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Treatment• remove the source of infection.• For odontogenic infections: endodontic treatment, or

extraction of the offending dentition.• Should be done concurrently with establishment of

drainage of the involved space(s).• Antimicrobial aid• In OMFS, treatment is incision and drainage (I&D) of the

involved space and removal of the causative agent

• remove the source of infection.• For odontogenic infections: endodontic treatment, or

extraction of the offending dentition.• Should be done concurrently with establishment of

drainage of the involved space(s).• Antimicrobial aid• In OMFS, treatment is incision and drainage (I&D) of the

involved space and removal of the causative agent

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Incision and Drainage I&D technique is the same regardless of the space(s). Sterile preparation and draping. Aspiration for investigation and obtaining sample for micro-

/pathologic studies. 1-2 cm incision through skin/mucosa. blunt dissection with instrument and/or finger to enter the

spaces and establish drainage. Use shortest and most direct route to the space. Placement of a drain, secured to the stoma of incision with

nylon, silk, or chromic suture.

I&D technique is the same regardless of the space(s). Sterile preparation and draping. Aspiration for investigation and obtaining sample for micro-

/pathologic studies. 1-2 cm incision through skin/mucosa. blunt dissection with instrument and/or finger to enter the

spaces and establish drainage. Use shortest and most direct route to the space. Placement of a drain, secured to the stoma of incision with

nylon, silk, or chromic suture.

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Antimicrobial Treatment

Adjunctive medical tx should ideally bedirected at the causative organisms.Based on Gram Stain, cultures and sensitivity.Empiric tx, is initiated based on common

pathogens.Changed based on ID, and clinical pictures.

Adjunctive medical tx should ideally bedirected at the causative organisms.Based on Gram Stain, cultures and sensitivity.Empiric tx, is initiated based on common

pathogens.Changed based on ID, and clinical pictures.

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Antimicrobial Treatment

• Commonly used antibiotics in OMFS• Penicillins• Cephalosporins• Erythromycin• Clindamycin• Metronidazole• Aminoglycosides

• Commonly used antibiotics in OMFS• Penicillins• Cephalosporins• Erythromycin• Clindamycin• Metronidazole• Aminoglycosides

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