A total of 45 consecutive patients ( Robinson class B1 or B2 ) were randomly allocated into two groups ; intramedullary pin ( IMP ) group ( n = 24 , mean age ; 33.178.60 years , 14 males 58.3 % ) received Sonoma CRx Collarbone pin ( Sonoma , USA ) whereas locking midshaft superior plating ( MIPPO ) group ( n = 21 , 32.388.41 years , 12 males ) patients received minimally invasive locking midshaft superior plating ( Acumed , USA ) .