▁each ▁other ▁from ▁side ▁to ▁side ▁across ▁the ▁joint . ▁They ▁are ▁th icker ▁at ▁the ▁outside ▁and ▁with ▁a ▁thin ▁inner ▁aspect ▁and ▁they ▁also ▁have ▁n erve ▁fib res ▁that ▁help ▁to ▁tell ▁the ▁brain ▁how ▁much ▁load ▁is ▁getting ▁transm itted ▁through ▁the ▁joint . ▁The ▁med ial ▁( inside ) ▁men is cus ▁is ▁often ▁dam aged ▁with ▁a ▁long - standing ▁cru ci ate ▁lig ament ▁ru pt ure ▁because ▁it ▁is ▁firm ly ▁attached ▁to ▁the ▁tib ia ▁and ▁gets ▁cr ushed ▁during ▁ab normal ▁c ran ial ▁movement ▁of ▁the ▁tib ia . ▁The ▁later al ▁( out side ) ▁men is cus ▁is ▁more ▁firm ly ▁attached ▁to ▁the ▁fem ur ▁and ▁does ▁not ▁get ▁cr ushed . ▁ ▁S urg ical ▁r ationale ▁The ▁triple ▁tib ial ▁o ste ot omy ▁was ▁developed ▁by ▁a ▁New ▁Zealand ▁veter inary ▁orth op a edic ▁special ist , ▁Dr . ▁W arr ick ▁Bruce , ▁while ▁he ▁was ▁working ▁in ▁Ad ela ide , ▁South ▁Australia . ▁By ▁changing ▁the ▁geometry ▁of ▁the ▁forces ▁of ▁gravity ▁and ▁mus cle ▁contra ctions ▁that ▁act ▁on ▁the ▁st if le ▁during ▁weight - b ear ing , ▁it ▁a ims ▁to ▁neutral ise ▁the ▁she ar ▁force ▁that ▁causes ▁the ▁c ran ial ▁movement ▁of ▁the ▁tib ia ▁with ▁respect ▁to ▁the ▁fem ur . ▁ ▁This ▁she ar ▁force ▁develop s ▁because ▁the ▁can ine ▁tib ial ▁plate au ▁– ▁the ▁weight - b ear ing ▁aspect