Repeated exposure of pregnant rats to oxygen at high pressure (65 psi) twice a day for seven days increased the height of the tooth germ and ameloblastic layer of the embryo, but the width and odontoblastic layer were not changed. Exposure of pregnant rats to oxygen at atmospheric pressure stimulated the body growth of the embryo in utero.
References
1.
Bean, J.W., and Siegfried, E.C.: Transient and Permanent After-effects of Exposure to Oxygen at High Pressure , Am J Physiol143:656-665, 1945.
2.
Vanden Brenk, H.A.S., and Jamieson , D.: Pulmonary Damage Due to High Pressure O2 Breathing in Rats, Aust J Exp Biol Med Sci40:37-50, 1962.
3.
Bean, J.W.: Effects of Oxygen at Increased Pressure, Physiol Rev25:1-147, 1945.
4.
Thomson, W.A.R. : The Physiology of Deep Sea Diving, Br Med J2:208-210, 1935.
5.
Bean, J.W., and Johnson, P.C.: Adrenocortical Response to Single and Repeated Exposure to Oxygen at High Pressure, Am J Physiol179:410-414, 1954.
6.
Nakamoto, T. , and Bean, J.W.: Differences in Growth Pattern of Bone and Incisor of Rats Exposed to O2 at Atmospheric and High Pressure, Arch Oral Biol17:799-810, 1972.
7.
Dines, J.H., and Hiatt, E.P.: Prolonged Exposure of Young Rats to an Oxygen Atmosphere at Reduced Pressure , J Appl Physiol19:17-20, 1964.
8.
Nakamoto, T. , and Wilson, R.H.: The Growth Rate of Tooth Germ in Newly-born Rats Injected with Cortisone Acetate, Arch Oral Biol13:1107-1118, 1968.
9.
Dawes, G.S.: Oxygen in the Fetus, in Dickens, F., and Neil, E. (eds) :Oxygen in the Animal Organism, London: Pergamon Press, 1964, pp 559-568.
10.
Parker, H.R. , and Purves, M.J.: Some Effects of Maternal Hyperoxia and Hypoxia on the Blood Gas Tensions and Vascular Pressure in the Foetal Sheep , Q J Exp Physiol52:205-221, 1967.
11.
Schour, I., and Massler, M.: The Teeth, in Farris, E.J., and Griffith, J.Q. (eds): The Rat in Laboratory Investigation, New York: Hafner Publishing Co., 1962, pp 3, 106, 112.
12.
Nakamoto, T. , and Wilson, R.H.: Effect of Combinations of Temperature and Light on Skeletal Development and the Growth Rate of Incisors in Rats, J Dent Res48: 461-466, 1969.
13.
Schour, I., and Van Dyke, H.B.: Changes in the Tooth Following Hypophysectomy. I. Changes in the Incisors of the White Rat, Am J Anat50:397-433, 1932.
14.
Bean, J.W.: The Hypophysis as a Determinant in the Reaction of the Mammal to Oxygen at High Pressure, Am J Physiol170:508-517, 1952.
15.
Leist, M.: Uber den einfluss des vegetativen nervensystems auf die zahne, Z Stomatol25:765-776, 1927.
16.
King, J.D.: Dietary Deficiency, Nerve Lesions and the Dental Tissue, J Physiol88: 62-76, 1937.
17.
Edwards, L.F. , and Kitchin, P.C.: Does Resection of the Nerves Supplying the Mandible Affect Tooth Development? J Dent Res17:115-124, 1938.
18.
Nelsen, O.E. : Increased Partial Pressure of O2 and the Acceleration of Development in Early Chick and Frog Embryo: Significance of Early Primitive Streak Activities, Growth22:189-213, 1958.
19.
Orban, B.; Ritchey, B.; and Zander, H.A.: Experimental Study of Pulp Changes Produced in the Decompression Chamber, J Dent Res25:299-309, 1946.
