Affect of particle size and grading during the remodelling of morsellised allograft

The effects of particle size and grading during the remodeling of three different types of morsellised allograft such as small, large and a graded mixture, were investigated. Washed morsellised cortical cancellous graft was prepared from the ends of sheep long bones, using a Lere bone Mill. Of the samples impacted in the laboratory, the graded and small graft behaved similarly but the larger graft exhibited differences. The results show that the remodeling exhibited an initial increase in porosity at six weeks followed by an extensive new bone formation resulting in a higher density at twelve weeks in all groups.