Astanga Hrudaya
ओष्ठौ रक्तावनुद्दृत्तौ, महत्यौ नोल्बणे हनू। महदास्यं, घना दन्ताः स्निग्धाः श्लक्ष्णाः सिताःसमाः॥११०॥
the lips should be red and not bulging out the lower jaw should be big but not protruding the mouth should be big, teeth should be thick (firm), unctuous, smooth, white and evenly placed.
english translation
oSThau raktAvanuddRttau, mahatyau nolbaNe hanU। mahadAsyaM, ghanA dantAH snigdhAH zlakSNAH sitAHsamAH॥110॥
hk transliteration by Sanscript