Oral Surgery Flashcards

(164 cards)

1
Q

patient attends emergency clinic with pain associated with partially erupted LR8. on examination you notice a pericoronal abscess and operculum is inflamed. how would you manage this?

A

LA
incise localised pericoronal abscess
irrigate with warm saline or chlorehexidine mouthwash under the operculum with a blunt needle

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2
Q

radiographic signs linked to a significantly increased risk of nerve injury during third molar surgery

A

diversion of the inferior dental canal
darkening of the root where crossed by the canal
interruption of the white lines of the canal

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3
Q

At what age do third molars usually erupt?

A

between 18 and 24

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4
Q

What are mandibular third molars usually impacted against?

A

adjacent tooth
alveolar bone
surrounding mucosal soft tissues
a combination of these factors

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5
Q

consequences of impacted third molars

A

caries
pericoronitis
cyst formation

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6
Q

what nerves are at risk during mandibular third molar surgery?

A

inferior alveolar
lingual
nerve to mylohyoid
long buccal

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7
Q

indications for extracting third molars

A

infection
- caries
- pericoronitis
- periodontal disease
- local bone infection
cysts
tumour
external resorption of 7 or 8
high risk of disease
medical indications e.g.g immunosuppressed
accessibility
autotransplantation

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8
Q

what is pericoronitis?

A

inflammation around the crown of a partially erupted tooth

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9
Q

how does pericoronitis occur?

A

food and debris gets trapped in the operculum resulting in inflammation and infection

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10
Q

what type of microorganisms are responsible for periocoronitis?

A

anaerobic microbes
e.g. streptococci, actinomyces, fusobacterium

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11
Q

pericoronitis signs and symptoms

A

pain
swelling
bad taste
pus discharge
ulceration of operculum
evidence of cheek biting
limited mouth opening
dysphagia
malaise
regional lymphadenopathy

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12
Q

pericoronitis treatment

A

incision of localised pericoronal abscess if present
- LA IDB - depends on pain/patient
irrigation with warm saline or chlorhexidine mouthwash (10-20ml syringe with blunt needle under the operculum)
XLA of upper third molar if traumatising the operculum
patient instructions on frequent warm saline or chlorhexidiene mouthwashes

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13
Q

pericoronitis - instructions to give patient

A

analgesia
instruct patient to keep fluid levels up and keep eating
- soft diet if necessary
generally do not prescribe antibiotics unless more severe case, systemically unwell, e/o swelling or immunocompromised e.g. diabetes
if large e/o swelling, systemically unwell, trsimus or dysphagia - refer to max fax or A&E

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14
Q

pericoronitis predisposing factors

A

partial eruption and vertical or distoangular impaction
opposing maxillary 2nd or 3rd molar causing mechanical trauma contributing to recurrent infection
poor oH
insufficient space between ascending ramus of lower jaw and distal aspect of mandibular 2nd molar
white race
full dentition

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15
Q

XLA 3rd molars - things to assess in radiographic examination:

A

only if surgical intervention is being considered
OPT to determine
- presence or absence of disease
- depth and orientation of impaction
working distance
periodontal status
any associated pathology
relationship of upper third molars to maxillary sinus or lower third molars to inferior dental canal

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16
Q

radiographic signs associated with a significant increased risk of nerve injury during third molar surgery

A

diversion of the inferior dental canal
darkening of the root where crossed by the canal
interruption of the white lines of the canal

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17
Q

What other imaging is possible if conventional imaging has shown a close relationship between the third molar and the inferior dental canal?

A

cone beam CT

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18
Q

post operative complications of third molar surgery

A

pain
swelling
bruising
jaw stiffness/limited mouth opening
bleeding
infection
dry socket

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19
Q

what percentage of patients may experience temporary numbness or parasthesia to the lower lip/chin following lower third molars extraction?

A

10-20%
may take weeks or months to improve
< 1% permanent

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20
Q

surgical extraction - steps

A

anaesthesia
access
bone removal as necessary
tooth division
debridement
suture
achieve haemostasis
post op instructions

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21
Q

surgical removal - anaesthesia options

A

LA
IV sedation and LA
general anaesthetic

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22
Q

how is access gained during a surgical extraction

A

mucoperioesteal flap is raised
- lingual flap may also be raised
use scalpel in one firm continuous stroke

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23
Q

aims of suturing

A

reposition tissues
cover bone
prevent wound breakdown
achieve haemostasis

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24
Q

what is a coronectomy?

A

removal of the crown of the tooth with deliberate retention of root adjacent to the inferior alveolar nerve
alternative to surgical removal of entire tooth where there appears to be an increased risk of IAN damage with surgical removala

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25
coronectomy steps
flap design as necessary to gain access transection of tooth 3-4mmm below crown elevation of crown without mobilising roots socket irrigated flap replaced
26
coronectomy follow up
review in 1-2 weeks further 3-6 monthly review then 1 year radiographic review - 6 months or 1 year or both - some take immediate or 1 week post op radiograph
27
coronectomy - warnings to patient
if root is mobilised during crown removal the entire tooth must be removed leaving roots behind can result in infection (rare) can get a slow healing/painful 'socket' roots may migrate later and begin to erupt through mucosa - may require extraction
28
Facial fractures - how would you carry out an e/o exam?
palpate bony margins of facial skeleton examine eyes - double vision - restriction of movement - subconjunctival haemorrhage palpate condyles and check movements - note any swelling, bruising, lacerations and altered sensation - damage to trigeminal evidence of cerebrospinal fluid leaking from nose or ears?
29
I/O exam - facial fracture
assess for alterations or step in occlusion fractured or displaced teeth lacerations and bruises check stability of maxilla - bimanual palpation - one hand attempting to mobilise from intra oral approach - other hand noticing any movement from extra oral sites
30
mandible fracture clinical signs
pain and swelling deranged occlusion paraesthesia in distribution of IAN floor of mouth haematoma
31
zygoma fracture clinical signs
clinical flattening of cheekbone prominence parasethesia in distribution of infraorbital nerve diplopia (double vision), restricted eye movements, sub-conjunctival haemorrhage limited lateral excursions of mandible movements palpable step in infraorbital bony margin
32
orbit fracture clinical signs
diplopia restricted eye movements subconunjunctival haemorrhage
33
maxilla fracture clinical signs
maxilla is mobile deranged occlusion gross swelling if high level fracture bilateral circumorbital bruising subcojunctival haemorrhage CSF leaking from nose or ear
34
nasal fracture clinical signs
swelling bilateral circumorbital bruising clinical deviation of nasal bridge nose bleed
35
mandible fracture radiographic views
OPT PA mandible - posteroanterior
36
zygoma fracture radiographic views
Occipotomental (OM)
37
Maxillary fracture radiographic views
OM CT for complicated fractures
38
nasal fracture radiographic views
occlusal
39
facial fracture management
close approximation of fragments immobilisation for around 6 weeks
40
How does trauma and infection lead to pain?
- trauma and infection lead to the breakdown of membrane phospholipids - this produces arachidonic acid - Arachidonic acid can be broken down to form prostaglandins - prostaglandins sensitise tissues to other inflammatory products resulting in pain
41
Arachidonic acid produces Leukotrienes when broken down, what does this result in?
- bronchoconstriction - smooth muscle contraction
42
Outline the mechanism of action for aspirin
- inhibits cycle-oxygenases COX 1 and COX 2 - thus reduces production of prostaglandins
43
outline the antipyretic properties of aspirin
- prevents temperature raising effects of interleukin-1 - thus reduces elevated temperature in fever - does not reduce normal temperature
44
Outline the anti-inflammatory properties of aspirin
- prostaglandins are vasodilators - therefore affect capillary permeability - aspirin reduces redness, swelling and pain at injury site
45
What are the possible adverse effects of aspirin?
- mucosal aspirin burns - GIT problems - hypersensitivity - overdose
46
Why can aspirin lead to GIT problems?
prostaglandins PGE and PGI2: - inhibit gastric acid secretion - increase blood flow through gastric mucosa - help production of mucin by cells in stomach lining - can lead to ulcers and gastro-oesophageal reflux
47
When is aspirin completely contraindicated?
- under 16s - patients with previous or active peptic ulceration - patients with haemophilia - patients with hypersensitivity to aspirin or other NSAIDs
48
Give 2 ways in which ibuprofen differs in effect from aspirin
- less effects on platelets - irritant to gastric mucosa lesser than with aspirin
49
What is the maximum adult dose for ibuprofen?
2.4g
50
What is the treatment for ibruprofen overdose?
activated charcoal
51
Outline the mode of action for paracetamol
- hydroperoxides are generated from metabolism of arachidonic acid by COX, which then exerts a passive feedback stimulating COX activity - feedback blocked by paracetamol, indirectly inhibiting COX
52
Where is the main site of action of paracetamol?
the thalamus of the brain
53
When would you take caution for prescribing paracetamol?
patients with: - hepatic impairment - renal impairment - alcohol dependence
54
What are the potential side effects of paracetamol?
- rashes - blood disorders - liver damage
55
What are the potential drug interactions of paracetamol?
- anti-coagulants (prolonged used may enhance anticoagulant effects of the coumarins) - cytotocics - lipid-regulating drugs - domperidone - metoclopramide
56
What is the maximum daily adult dose for paracetamol?
4g
57
Outline possible downsides of opiods
- dependence - tolerance - constipation - urinary and bile retention
58
What are the side effects of opioids?
- nausea - vomiting - drowsiness - respiratory depression and hypotension in larger doses - dry mouth - sweating - bradycardia - rashes - palpitations - hallucinations - mood changes - tachycardia - mood changes
59
When are opioids completely contraindicated?
- acute respiratory depression - acute alcoholism - raised inter cranial pressure/head injury
60
Which patients should be prescribed opioids with extra caution?
- hypotention - asthma - pregnant/breast feeding - hypothyroidism
61
Give examples of possible peri-operative extraction complications
- difficult access - abnormal resistance - fracture of tooth or root - fracture of alveolar bone - jaw fracture - loss of tooth - soft tissue damage - damage to nerves or vessels - damage to adjacent teeth - dislocation of TMJ - wrong tooth - broken instruments - haemorrhage
62
What factors may lead to difficult access?
- trismus - reduced opening of mouth - crowded teeth
63
What factors may lead to abnormal resistance?
- thick cortical bone - shape of roots e.g. hooked roots - number of roots e.g. 3 rooted molars - ankylosis
64
What factors make a tooth more vulnerable to fracture during extraction?
- caries - alignment - size - root morphology e.g. ankylosis
65
What are the risk factors for OAC following extraction?
- upper molars or premolars extracted - close relation to sinus on radiograph - large, bulbous roots - previous OAC - recurrent sinusitis
66
define paraesthesia
a tingling sensation
67
define dysaesthesia
an unpleasant sensation/pain
68
define hypoaesthesia
reduced sensation
69
define hyperaestheisa
increases or heightened sensation
70
Give reasons why excessive bleeding can occur during an extraction
- local factors e.g. mucoperiosteal tears - undiagnosed clotting abnormalities - liver disease - medication e.g. warfarin
71
management of maxillary sinus involvement
inform patient if small or sinus intact - encourage clot - suture margins - antibiotic - post op instructions if large or lining torn - close with buccal advancement flap - antibiotic and nose blowing instructions
72
neuropraxia definition
- contusion of nerves - continuity of epieneural sheath and axons maintained
73
axonotmesis definition
- continuity of axons disrupted - epieneural sheath maintained
74
neurotmesis definition
- complete loss of nerve continuity
75
OAC acute management
inform patient if small or sinus lining intact - encourage clot - suture margins - antibiotic - post op instructions if large or lining torn - close with buccal advancement flap
76
OAC - post op instructions
avoid blowing nose or sneezing with pinched nostrils as both actions can increase sinus pressure and cause wound breakdown also avoid - smoking - sucking through straws - blowing up balloons or air mattresses - playing a wind or brass musical instrument - snorkeling or scuba diving also advisable to keep a soft diet and avoid any sharp/hard foods that may interfere with healing wound
77
chronic OAF - common patient complaints
problems with fluid consumption - fluids going into nose problems with speech or singing - nasally quality problems playing brass/wind instruments problems smoking problems using a straw bad taste/pus discharge - post-nasal drip pain/sinusitis type symptoms
78
root or tooth in maxillary sinus - management
confirm radiographically - OPT - occlusal - or periapical - or CBCT decision on retrieval - if in doubt or retrieval difficult - refer
79
root or tooth in maxillary sinus - ways to retrieve
through extraction socket - open fenestration with care - suction - small curettes - irrigation or ribbon gauze - close as for OAC Calwell-Luc approach - buccal/labial sulcus - buccal window cut in bone ENT - endoscopic retrieval
80
Sinusitis signs and symptoms
facial pain pressure congestion nasal obstruction paransal drianage hyposomia - reduced ability to smell or detect odors fever headache dental pain halitosis fatigue cough ear pain anaesthesia/parasthesia over cheek
81
Causes of TMD
myofascial pain - problems with the muscles disc displacement - anterior with reduction - anterior without reduction degenerative disease - localised = osteoarthrtis - generalised = rheumatoid arthrtis chronic recurrent dislocation ankylosis hyperplasia neoplasia infection
82
TMJ myofascial pain aetiology
inflammation of muscles of mastication or TMJ itself - usually secondary to parafunctional habits may be a history of trauma, either directly to joint or indirectly e.g. sustained mouth opening during dental treatment stress - muscles tense up
83
TMD special investigations
not usually required radiographic evaluation if pathology suspected: - OPT - CT/CBCT - MRI - Ultrasound - Arthtography - Transcranial view - Nuclear imaging
84
TMD common clinical features
females > males most common between 18-30 intermittent pain of several months or years muscle/joint/ear pain, particularly on wakening trismus/locking cicking/poppung joint noises headaches crepitus indicates less degenerative changes
85
TMD - differential diagnosis
dental pain sinusitis headache ear pathology atypical face pain trigemina neuralgia salivary gland pathology referred neck pain condylar fracture temporal arteritis
86
TMD treatment options
patient education counselling physical therapy medications splints occlusal adjustment TMJ surgery
87
TMD physical therapy options
Physiotherapy massage/heat relaxation acupuncture TENS (transcutaneous electronic nerve stimulation) hypnotherapy
88
advice to give patients with TMD
soft diet masticate bilaterally no wide opening no chewing gum cut foods into small prices stop parafunctional habits e.g. nail biting, grinding support mouth on opening e.g. yawning
89
What is anterior disc displacement with reduction?
most common cause of TMJ clicking disc is initially displaced anteriorly during opening until disc reduction occurs
90
signs/symptoms of anterior disc displacement with reduction
jaw tightness/locking - jaw movement is impaired for a short period of time until disc reduces mandible may initially deviate to affected side before returning to midline may eventually progress to osteoarthritis if left untreated
91
Disc displacement with reduction - treatment
counselling limited mouth opening bite raising appliance surgery occasionally may be required no treatment required if painless - reassurance
92
trismus from trauma - features
can occur after minor 'traumatic events' - IDB - prolonged dental treatment - infection will usually resolve spontaneously
93
trismus management options - if no resolution after acute phase
physiotherapy Therabite jaw screw
94
What is disc displacement without reduction?
displaced disc remains in a displaced position regardless of the age of opening
95
disc displacement without reduction - clinical features
reduced mouth opening no click pain may be present in front of the ear
96
TMJ surgery intra and post operative complications
broken instruments middle ear perforation glenoid fossa perforation haemorrhage haemarthrosis dysocclusion perforation of tympanic membrane
97
malar fracture clinical signs
periorbital bruising and swelling subconjunctival bruising sensory deficit in distribution of infraorbital nerve diplopia epistaxis step deformity facial flatness - flattening of cheekbone prominence limited mouth opening
98
Suspected malar/zygoma fracture - how to assess
palpate for irregularities of supraorbital ridge palpate for irregularities of infraorbital ridge and zygoma palpate for depression of zygomatic arch manouvre to ascertain motion in maxilla
99
zygoma fracture initial care
exclude ocular injury prophylactic antibiotics avoid blowing nose
100
zygoma fracture definitive managemnet
review when swelling subsided further radiographs +/- CT scans informed consent closed reduction +/- fixation open reduction +internal fixation
101
describe Le Fort I fracture and common signs
horizontal fracture of the anterior maxilla can be unilateral or bilateral signs - mobility of maxilla - deranged occlusion - ecchymosis of maxillary buccal sulcus and palate - "cracked pot" percussion of teeth
102
describe Le Fort II fracture and common signs
pyramidal fracture involving nasal bridge, maxilla, lacrimal bones, orbital floor and inferior orbital rim signs - mobility of mid face - gross facial swelling - racoon eyes - epistaxis - deranged occlusion - subconjunctival haemorrhage - ecchymosis of maxillary buccal sulcus and palate - numbness/paraesthesia in V2 region
103
describe Le fort III fracture and clinical signs
complete separation of mid face from cranium fracture involves nasal bones, medial, inferior and lateral orbital walls, pterygoid processes and zygomatic arches common signs - racoon eyes - increased facial height - flattening of facial profile - mobility of maxilla, nose and zygoma - anterior open bite - ecchymosis over mastoid region
104
Classifications of mandibular fracture
greenstick - incomplete fracture, frequently seen in children simple - separation of bone with no/minimal fragmentation comminuted - bone has been fragmented usually in line with high velocity impacts open - fracture communicates with the outside environment e.g. mouth
105
mandible fracture - surgical options
closed reduction - uses inter-maxillary fixation to immobilise fractured segments to allow for bony healing open reduction and internal fixation
106
mandibular fracture - post op
post op imaging - OPT + PA mandible soft diet 4-6 weeks antibiotics analgesia CHX mouthwash education for those in IMF follow-up in clinic
107
advice to give patient who has suffered orbit fracture
avoid blowing nose sleep wit head of bed elevated cold compress to reduce peri orbital oedema
108
Chronic OAF - patient complaints
problems with fluid consumption - fluids from nose problems with speech or singing - nasal quality problems playing brass/wind instruments problems smoking problems using straw halitosis, pus discharge, bad taste pain/sinusitis type symptoms
109
Oro-antral fistula - management
excise sinus tract raise flap antral washout suture
110
Maxillary tuberosity fracture aetiology
single standing molar extracting in wrong order inadequate alveolar support
111
fractured tuberosity diagnosis
noise movement noted both visually or with supporting fingers more than one tooth movement tear in soft tissue of palate
112
tuberosity fracture mansgemt
reduce and stabilise - orthodontic buccal arch wire with composite - arch bar - lab made splint dissect out and close wound primarily
113
Root in antrum - how to retrieve
through extraction socket - open fenestration with care - suction - small curettes - irrigation - close as for OAC OR Caldwell-Luc approach - buccal labial sulcus - buccal window cut in bone OR ENT referral - endoscopic retrieval
114
sinusitis signs and symptoms
facial pain pressure congestion nasal obstruction paransal drainage hyposomia fever headache dental pain fatigue cough ear pain altered sensation over cheek
115
sinusitis - common issues to rule out
periapical abscess periodontal infection deep caries recent extraction socket TMD neuralgia or atypical facial pain
116
sinusitis indicators
discomfort on palpation of infraorbital region a diffuse pain in maxillary teeth equal sensitivity from percussion of multiple teeth in same region pain that worsens with head or facial movements
117
sinusitis treatment options
decongestants to reduce mucosal oedema humidified air antibiotics (if symptoms haven't improved and bacterial sinusitis suspected) Pen V 2x250mg 4 times a day for 5 days Doxycycline 2x100mg first day then 100mg for 4 days
118
where can infection of the upper central incisors teeth spread to?
lip nasolabial region lower eyelid
119
where can upper lateral infection spread to?
palate - less common
120
where can infection of the upper premolars and molars spread to?
cheek infra temporal region maxillary antrum - very rare palate - less common
121
infection of the lower anterior teeth can spread to...
the mental and submental space
122
infection of the lower premolars and molars can spread to...
buccal space submasseteric space sublingual space submandibular space lateral pharyngeal space
123
surgical management of infection spread
establish drainage - extra oral - intra oral remove source of infection antibiotic therapy
124
bilateral cellulitis of the sublingual and submandibular spaces (Ludwig's angina) - I/O features
raised tongue difficulty breathing difficulty swallowing drooling
125
bilateral cellulitis of the sublingual and submandibular spaces (ludwig's angina) - E/O features
redness and bilateral swelling in submandibular region
126
Ludwigs angina - systemic features
increased - heart rate - respiratory rate - temperature - white cell count
127
normal respiratory rate ranges between
12-20
128
normal oxygen saturation
> or = 96%
129
normal body temp
36.1-38
130
high systolic blood pressure
>220
131
normal heart rate
50-90bpm
132
national early warning score (AVPU)
alert responds to verbal commands responds to pain completely unresponsive
133
What is Ludwig's angina
bilateral infection of submandibular space
134
Ludwig's angina management in GDP
diagnosis seek advice
135
Ludwig's angina and soi - secondary care management
diagnosis sepsis 6 National early warning score
136
What is the sepsis 6?
give high flow oxygen take blood cultures give IV antibiotics give a fluid challenge measure lactate measure urine output should be done in the first hour
137
Ludwig's angina - most common bacteria strains responsible
anaerobic gram negative bacilli - streptococcus angionous - anaerobic streptococci
138
What is SIRS ? give the 4 features
Severe inflammatory response syndrome - temp <36 or 38C - pulse >90/min - respiratory rate >20/min - white cell count <4000/mm3 or >12000/mm3 2 criteria required for SIRS diagnosis
139
Sepsis is characterised by
SIRS + suspected or confirmed infection
140
Sepsis - define
life threatening organ dysfunction caused by dysregulated host response to infection
141
What is a biopsy?
a sample of tissue taken for histopathological analysis
142
Biopsy - advantages
can confirm or establish a diagnosis determine prognsoiss
143
Features of an excisional biopsy
all clinically abnormal tissue removed usually fairly confident of provisional diagnosis usually benign lesions
144
incisional biopsy features
representative tissue sample larger lesions uncertain diagnosis
145
What is a punch biopsy?
type of incisional biopsy removes core of tissue minimal damage may not require suture
146
How to choose an area for biopsy
choose representative sample not necessary to include normal tissue margin try to avoid important structures
147
Functions of the paranasal sinuses
resonance to the voice reserve chambers for warming inspired air reduce weight of the skull
148
The maxillary sinus opens at...
the semilunar hiatus
149
flap design options for closing an OAC
buccal advancement flap buccal fat pad with buccal advancement flap palatal rotational flap bone graft/collagen membrane
150
fractured tuberosity - diagnosis (signs)
noise movement noted both visually or with supported fingers more than one tooth movement tear in tissue of palate
151
tuberosity fracture management
reduce and stabilise - orthodontic buccal arch wire with composite - arch bar - or lab made splint or dissect out and close wound primarily
152
if you splint a tooth following a tuberosity fracture, what must you also do?
remove or treat pulp ensure tooth is out of occlusion consider antibiotics give post op instructions surgically remove the tooth 4-8 weeks later
153
What surgical procedure is done to correct maxillary skeletal discrepancies?
Le Fort 1 osteotomy
154
What surgical procedure is used to correct mandibular skeletal discrepancies?
sagittal split mandibular osteotomy
155
when it comes to bone grafts their are 4 options - name them
autografts - graft taken from patient themselves - e.g. rib allografts - bone from other human xenografts - from animals - e.g. Bio-Oss synthetic - e.g. tricalcium phosphate
156
Pre prosthetic surgery soft tissue procedures - give examples
excisional - frenectomy - pappilary hyperplasia - maxillary tuberosity reduction ridge extension procedures - vestibuloplasty
157
outline different TMJ diseases
TMJ dysfunction jaw dislocation osteoarthritis rheumatoid arthritis chondromatosis foreign body granuloma tumour ankylosis traumatic damage radiation damage infection
158
TMJ - 2 types of trauma
macrotrauma - singular large trauma e.g. fracture microtrauma - caused by overloading joint over ra prolonged period of time
159
TMJ surgery post op management
pain management joint rest - soft diet - avoid wide opening physical therapy restoration of occlusal stability
160
TMJ surgical procedures
disc placation eminectomy meniscectomy high condylar shave condylectomy reconstructive procedures
161
indications for TMJ reconstruction
joint destruction - trauma - infection - previous surgery - radiation anklysosis tumours - giant cell lesions - firbo-osseous lesions - myxomas
162
give at least 6 signs and symptoms of TMD
clicking popping crepitus earache trismus headache tender muscles of mastication tongue scalloping attrition linea alba
163
which 2 muscles would you palpate in a patient with suspected TMD?
masseter temporalis
164
patient attends with facial swelling - give at least 4 features you would need to note concerning swelling
size colour site heat texture induration pus palpation duration airway compromisation