A study was made concerning the effects of sialoadenectomy and parotin hormone administration upon sponge-induced granulation tissue of young adult rats. The effects of sialoadenectomy alone and sialoadenectomy plus a single subcutaneous injection of parotin hormone, in two different doses (0.15 and 0.30 mg), on the development of 15-day-old granulation tissue were observed. The action of parotin hormone administration without sialoadenectomy was also investigated.
The results have that sialoadenectomu produces a retardation effect upon the development of the tissue. This effect was partially inhibited by 0.15 mg and totally eliminated by the administration of 0.30 mg of hormone. When administered in rats which were not sialoadenectomized, the dose of mg caused increased fibroplasia and vascularization of tissue, while a dose of 0.15 mg did not cause any significnat difference whem compared to the control tissue.

The effect of hydrocortisone on the rate of mineralization of the dentine of rat incisors has been investigated and a comparative analyses of thes effect on the upper and lower incisors as well as the various aspects of these incisors has benn made.