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Dental observations on Australian aborigines—Continuously changing functional occlusion
ABSTRACTS
OF CURRENT
LITERATURE
..*.....................
CLINICAL
AND LABORATORY
Studies on the Acid Decalcification (Sydney), and H. R. Sullivan, United Dental Hospit,al, Sydney.
RESEARCH of Human Dental Enamel. Joan E. Hills, M.Sc. D.D.Sc. (Sydney), Institute of Dental Research, Australian Dent. J. 3: 6-18, February, 1958.
The solubility of powdered dental enamel was studied in a series of citrate and lactate bufiers with various pH values containing various amounts of calcium phosphate (hydroxyapatite). The effect of the presence of carbon tlioxidc on the solution of the enamel was illSO inwstigatcd. it was concluded that the constituents of the From the results of these investigations, cwamel dissolve in the proportions in which they occur in the solid please and that the ~1-1 value at which this solution cwurs (lrpeuds upon the eonccwtration of calcium and phosphorus There was no prrfewntial solution of the carbonate from t,he present in the environment. enamel ; nor did the lnweuw of ~trbon tlioxitle in the rystcw haw any eff’ect on the solution of the enamel. A. J. A. Dental
Observations on Australian Aborigines-Continuously clusion. M. J. Barrett, M.D.S., I)ental School, University Dent. J. 3: 39-52, February, 1958.
Changing Functional Ocof Adelaide. Australian
This article reports a study on the i-&h and dental arches of full-blooded Australian It deals in some aborigines living at Yuendumu Native Settlement in Central Australia. detail with the significance of the well-known marked wear of aboriginal teeth. throughout life, and develops a Attrition commences at au early age, is progressive The pattern of wear is one of continued change which more or less characteristic. patteru. affects not only the shape of the twth but also the manner of occlusion of the dental arches. The pattern of wear established iu the deciduous dentitiou determines, at least, the developing pattern of wear in the permanent dentition.
to some extent
As seen in these aboriginal subThe meaning of the term ‘ ‘ occlusion’ ’ is discussed. jects, occlusion is a functional relationship of the teeth-a dynamic process which undergoes continual change throughout the dental life of the individual. At no stage does the aboriginal occlusion resemble the so-called ideal occlusion of unworn teeth of civilized man. dental
Centric occlusion, as generally arches of many of the adult
understood or implied, does not exist natives examined at Yuendumu.
in the well-worn A. J. A.
806
OF CURRENT
LITERATURE
..*.....................
CLINICAL
AND LABORATORY
Studies on the Acid Decalcification (Sydney), and H. R. Sullivan, United Dental Hospit,al, Sydney.
RESEARCH of Human Dental Enamel. Joan E. Hills, M.Sc. D.D.Sc. (Sydney), Institute of Dental Research, Australian Dent. J. 3: 6-18, February, 1958.
The solubility of powdered dental enamel was studied in a series of citrate and lactate bufiers with various pH values containing various amounts of calcium phosphate (hydroxyapatite). The effect of the presence of carbon tlioxidc on the solution of the enamel was illSO inwstigatcd. it was concluded that the constituents of the From the results of these investigations, cwamel dissolve in the proportions in which they occur in the solid please and that the ~1-1 value at which this solution cwurs (lrpeuds upon the eonccwtration of calcium and phosphorus There was no prrfewntial solution of the carbonate from t,he present in the environment. enamel ; nor did the lnweuw of ~trbon tlioxitle in the rystcw haw any eff’ect on the solution of the enamel. A. J. A. Dental
Observations on Australian Aborigines-Continuously clusion. M. J. Barrett, M.D.S., I)ental School, University Dent. J. 3: 39-52, February, 1958.
Changing Functional Ocof Adelaide. Australian
This article reports a study on the i-&h and dental arches of full-blooded Australian It deals in some aborigines living at Yuendumu Native Settlement in Central Australia. detail with the significance of the well-known marked wear of aboriginal teeth. throughout life, and develops a Attrition commences at au early age, is progressive The pattern of wear is one of continued change which more or less characteristic. patteru. affects not only the shape of the twth but also the manner of occlusion of the dental arches. The pattern of wear established iu the deciduous dentitiou determines, at least, the developing pattern of wear in the permanent dentition.
to some extent
As seen in these aboriginal subThe meaning of the term ‘ ‘ occlusion’ ’ is discussed. jects, occlusion is a functional relationship of the teeth-a dynamic process which undergoes continual change throughout the dental life of the individual. At no stage does the aboriginal occlusion resemble the so-called ideal occlusion of unworn teeth of civilized man. dental
Centric occlusion, as generally arches of many of the adult
understood or implied, does not exist natives examined at Yuendumu.
in the well-worn A. J. A.
806