▁of ▁the ▁joint ▁– ▁is ▁s loped ▁ca ud ally ▁( down wards ▁towards ▁the ▁back ▁of ▁the ▁joint ) ▁and ▁there ▁is ▁an ▁ac ute ▁angle ▁between ▁the ▁tib ial ▁plate au ▁slope ▁and ▁the ▁pat ell ar ▁lig ament . ▁In ▁the ▁triple ▁tib ial ▁o ste ot omy ▁procedure , ▁the ▁tib ia ▁has ▁three ▁o ste ot om ies ▁( cut s ▁into ▁the ▁b one ▁with ▁a ▁b one ▁saw ) ▁performed ▁upon ▁it ▁with ▁the ▁aim ▁of ▁real ign ing ▁the ▁tib ial ▁plate au ▁slope ▁so ▁that ▁it ▁ultimately ▁becomes ▁aligned ▁at ▁right ▁angles ▁to ▁the ▁pat ell ar ▁lig ament ▁instead ▁of ▁s lop ing ▁backwards . ▁By ▁ach ieving ▁this , ▁she ar ▁forces ▁within ▁the ▁joint ▁are ▁neutral ised ▁and ▁the ▁joint ▁is ▁stable ▁as ▁the ▁dog ▁weight - b ears . ▁ ▁The ▁joint ▁is ▁not ▁stable , ▁however , ▁when ▁it ▁is ▁phys ically ▁manip ulated ▁by ▁attempting ▁to ▁move ▁the ▁tib ia ▁c ran ial ly . ▁This ▁contrast s ▁with ▁previous ▁methods ▁of ▁c ran ial ▁cru ci ate ▁lig ament ▁repair ▁which ▁aim ed ▁to ▁provide ▁stability ▁to ▁the ▁joint ▁by ▁replacing ▁the ▁lig ament ▁either ▁with ▁a ▁fas cial ▁gra ft ▁within ▁the ▁joint , ▁or ▁using ▁a ▁prost h esis ▁made ▁of ▁n yl on ▁placed ▁extern ally ▁from ▁the ▁later al ▁f abel la ▁to ▁a ▁hole ▁d ril led ▁in ▁the ▁tib ial ▁cr est . ▁ ▁The ▁triple ▁tib ial ▁o ste ot