Table 1. Semi-quantitative scale for estimation of bone formation.

Score	Extent of bone in Transplant
0	No bone evident
1	Minimal bone evident (one trabecular per section)
2	Low bone formation, occupying only small portion of section
3	Moderate bone formation, occupying a substantial portion but less than one-half of the section
4	Abundant bone formation, occupying greater than one-half of the section