 A medial parapatellar arthrotomy was then made by using a second knife and this was taken both distally and proximally to allow us to sublux the patella on the lateral aspect to allow exposure to the joint surface. 
A medial parapatellar arthrotomy was then made by using a second knife and this was taken both distally and proximally to allow us to sublux the patella on the lateral aspect to allow exposure to the joint surface .