. e . ▁the ▁t issues ▁that ▁support ▁the ▁teeth ) ▁are ▁inner v ated ▁by ▁the ▁max ill ary ▁and ▁mand ib ular ▁divisions ▁of ▁the ▁trig em inal ▁n erve . ▁Max ill ary ▁( upper ) ▁teeth ▁and ▁their ▁associated ▁period ont al ▁lig ament ▁are ▁inner v ated ▁by ▁the ▁superior ▁al ve olar ▁n erves , ▁branches ▁of ▁the ▁max ill ary ▁division , ▁term ed ▁the ▁posterior ▁superior ▁al ve olar ▁n erve , ▁anterior ▁superior ▁al ve olar ▁n erve , ▁and ▁the ▁vari ably ▁present ▁middle ▁superior ▁al ve olar ▁n erve . ▁These ▁n erves ▁form ▁the ▁superior ▁dent al ▁p lex us ▁above ▁the ▁max ill ary ▁teeth . ▁The ▁mand ib ular ▁( lower ) ▁teeth ▁and ▁their ▁associated ▁period ont al ▁lig ament ▁are ▁inner v ated ▁by ▁the ▁inferior ▁al ve olar ▁n erve , ▁a ▁branch ▁of ▁the ▁mand ib ular ▁division . ▁This ▁n erve ▁runs ▁inside ▁the ▁mand ible , ▁within ▁the ▁inferior ▁al ve olar ▁canal ▁below ▁the ▁mand ib ular ▁teeth , ▁giving ▁off ▁branches ▁to ▁all ▁the ▁lower ▁teeth ▁( in fer ior ▁dent al ▁p lex us ). ▁The ▁or al ▁m uc osa ▁of ▁the ▁ging iva ▁( g ums ) ▁on ▁the ▁fa cial ▁( lab ial ) ▁aspect ▁of ▁the ▁max ill ary ▁in cis ors , ▁can ines ▁and ▁prem olar ▁teeth ▁is ▁inner v ated ▁by ▁the ▁superior ▁lab ial ▁branches ▁of ▁the ▁inf ra orb ital ▁n