Basics of Orthognathic Surgery Flashcards

1
Q

what can people with severe retrognathic mandibles suffer from

A

obstructive sleep apnoea and snoring

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2
Q

what can people with AOB suffer from

A

chronic gingivitis and dry mouth

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3
Q

what are the fundamentals of orthognathic surgery

A

team approach
history taking to understand patient
careful clinical examination
investigations
prediction planning
stable surgical techniques

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4
Q

who is in the orthognathic surgery team

A

psychologist
orthodontist
surgical
technologist
restorative
speech and language therapy

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5
Q

what is the job of the psychologist in the orthognathic surgical team

A

early recognition of psychological problems
understand real motivation for surgery
postsurgical depression
psychological adaptation to new face

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6
Q

what do psychologists look at in the psychological assessment of patients before orthognathic surgery

A

what is patients mental state
previous psychiatric problems
existing disorders

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7
Q

what would body dysmorphic disorder look like

A

pre-occupied with defect in appearance leading to significant distress
associated mental disorders - obsession

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8
Q

what is viropharyngeal incompetence and who has this

A

cleft lip and palate patients
soft palate and hypernasal tone

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9
Q

what is the job o the orthodontists in the orthognathic surgery team

A

recognise dentofacial deformities
orthodontic treatment before and after
follow up

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10
Q

what can the cause of facial deformity be

A

congenital causes
hormonal causes
trauma
pathology
syndromic malformation

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11
Q

what is included in the extra oral examination of patients for orthognathic surgery

A

vertical asymmetry
horizontal asymmetry
lip and nose morphology
AP relationship
paranasal hollowing
lips

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12
Q

what is vertical asymmetry

A

when one eye is higher than the other

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13
Q

what is horizontal asymmetry

A

when one eye is further to the left than the other

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14
Q

how much tooth and crown should a normal smile line show

A

whole crown and 1-2mm of gingiva

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15
Q

what should the intra-oral assessment for orthognathic surgery be

A

general dental assessment
occlusal relationship
centre line discrepancy relative to the face
overjet and overbite
crossbite
occlusal canting
incisors inclination
crowding and spacing
tongue size, mobility and speech pattern
cleft cases and viropharyngeal impairment

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16
Q

what diagnostic aids are used in orthognathic surgery

A

radiographs
study models
photographs
facebow
stereophotogrammetry

17
Q

what type of radiographs are used in orthognathic surgery

A

OPT - impacted and unerupted teeth, pathology
cephalograms
periapicals
occlusals - damage to bone
CBCT

18
Q

what investigations are used to capture the soft tissues, skeletal tissues and dental tissues with 3D planning

A

photographs
CBCT scanning
intra-oral scanning

19
Q

what is the purpose of the digital occlusal wafer

A

fits in the dentition in the preplanned position to use as a guide