sᵻvˈɪɹ kˈeɪsᵻz ʌv ˌoʊˌɛsˈeɪ mˈeɪ biː tɹˈiːɾᵻd wɪð ɐn ˈoːɹəl ɐplˈaɪəns ɪf ðə pˈeɪʃənt hɐz hæd ɐ tɹˈaɪəl ɹˈʌn wɪð ɐ sˈiːpˈæp.
Severe cases of OSA may be treated with an oral appliance if the patient has had a trial run with a CPAP.