osteoclasis

noun
os·​te·​oc·​la·​sis | \ ˌäs-tē-ˈäk-lə-səs How to pronounce osteoclasis (audio) \
plural osteoclases\ -​lə-​ˌsēz How to pronounce osteoclases (audio) \

Medical Definition of osteoclasis

: the breaking of a bone as a step in the correction of a deformity