regularly (r)
/ˈreɡ.jʊ.lərli/ 

occurring at fixed intervals

position (n)
/pəˈzɪʃ.ən/

the right or appropriate place

overview (n)
/ˈəʊ.və.vjuː/ 

a short description of something that provides general information but no details

irritate (v)
/ˈɪr.ɪ.teɪt/

to chafe or inflame, to bother

illuminate (v)
/ɪˈluː.mɪ.neɪt/

to provide or brighten with light

habit (n)
/ˈhæbət/

usual behavior

evident (a)
/ˈev.ɪ.dənt/

easily seen or understood; obvious

encouragement (n)
/ɪnˈkʌr.ɪdʒ.mənt/ 

the act of encouraging somebody to do something; something that encourages somebody

distraction (n)
/dɪˈstræk.ʃən/

the act of being turned away from the focus

catch up (phrasal verb)
/kætʃ/ 

to bring up to date

restore (v)
/rɪˈstɔːr/ 

to bring back to an original condition

dentist (n)
/ˈden.tɪst/

a person whose job is treating people's teeth

gum (n)
/ɡʌm/

the firm pink flesh in your mouth that your teeth are fixed into

tooth (n)
/tuθ/

any of the hard white structures in the mouth used for biting and chewing food

checkup (n)
/ˈtʃekˌʌp/

an examination by a doctor or dentist to make sure that you are healthy

stain (n)
/steɪn/

a dirty mark on something that is difficult to remove

anesthesia (n)
/ˌæn·əsˈθi·ʒə/

the condition of not feeling pain, esp. by use of special drugs

orthodontics (n)
/ˌɔːr.θoʊˈdɑːn.t̬ɪks/

the treatment of problems concerning the position of the teeth and jaws

oral surgery (n)
/ˈɔr·əl ˈsɜr·dʒə·ri/

a branch of dentistry that uses surgical methods to treat disorders and diseases of the teeth, gums, and jaws

extract (v)
/ɪkˈstrækt/

to remove or take out something