the circadian control of bone and cartilage induction in calcified , surface-decalcified and cryolytic allografts implanted heterotopically ( im ) or in fibular osteotomy sites was assessed in rats entrained in a 12/12 hour light cycle ( photoperiod = 0800-2000 hr ) : heterotopic grafting was performed at intervals of 4 hours within a 24-hour period , and the animals were sacrificed 3-4 weeks after grafting .
C0262950
bone
C0029468
osteotomy