Cleft Palate Exam 1
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| When does complete cleft form? | Before 9th week, growth is arrested
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| Complete Cleft | Goes all the way into nose, includes lip, alveolus, hard palate, and velum
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| Incomplete Cleft | Won't go all the way into nose
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| When does incomplete cleft form? | 9th week
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| Bilateral cleft | Clefted on both let and right sides of lip/nose
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| Incomplete cleft palate | only posteriorly cleft (at incisive foramen and behind it)
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| Where does cleft palate occur? | Median palatine suture because the palate only has one suture line, must split here
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| _______ cannot be differentiated with bilateral and unilateral | palate
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| Other types of cleft | Soft palate only, holoprosencephaly (no philtrum)
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| Primary palate | Lip and alveolar process, complete or incomplete, bilateral or unilateral
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| Secondary palate | Area posterior to incisive foramen (hard and soft palate), incomplete or complete
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| Submucous Cleft | Mucous membrane is intact, cleft under mucosal layer
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| What may you see with sub mucous cleft? | Bifid uvula, furrow along midline, zona pellucida, bony notch where posterior nasal spine should be, anterior insertion of elevator muscle, history od nasal regurgitation
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| What do you see when levator muscle anteriorly inserts? | Notching
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| Microform cleft | Partial or arrested form of cleft lip
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| Simonarr's band | Strand of soft tissue in area of cleft
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| Prolabia | Soft tissue only and no bones seen
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| What does it mean if premaxilla is out? | There is bone seen in the cleft
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| Incidence of Cleft | 1 in 595 births
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| Percentage that are lip only | 25%
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| Percentage that are palate only | 25%
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| Percentage that are both lip and palate | 50%
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| Of the percentage that are only lip_______ are unilateral. | 80%
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| Of the percentage that are lip only ____ of the time it's on the left. | 70%
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| Ethnicity of most prevalence of cleft lip | Native Americans
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| ______over______ have more palatal clefts only | Females; males
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| ______over______ have more combo clefts | Males; females
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| ______over______ have more severe forms of cleft | Males; females
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| Percentage of people with another abnormality in addition to cleft | 14-15%
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| Which type of cleft is least likely to be associated with additional stuff? | Lip only
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| Which type of cleft is most likely to be associated with additional stuff? | Palate only
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| What has no direct affect on cleft? | Parental age and birth order of kid
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| What is the cause of the cleft? | Multifactoral inheritance
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| What exasperates chance of cleft? | Environmental factors
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| It is _______ for a child to be brown with a cleft is their mother, father, or sibling has one. | more likely
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| Precent of etiology for inheritance | 20%
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| Percent of etiology for chromosomal | 3-5%
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| Percent of etiology for environmental/unknown | 65%
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