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J F van Reenen

Publications and source records attributed to J F van Reenen.

18 recordsLinked to original sources
PubMed1996

Maxillary premolar crown morphology. A preliminary study.

There seems to be a reluctance to use the Osborn terminology for identifying crown structures in the premolars of man. This may be attributed to the lack of studies on the premolars of man in which their topography has been compared with molars. We have attempted to do this using the principles of serial homology. Our study confirms that the two major maxillary premolar cusps in man are the paracone and protocone. We suggest that the lingual cingulum and the metacone have been lost and that remnants of the metaconule have made a contribution to the distal crown margin.

Bicuspid↗
PubMed1991

Tooth size and the Carabelli trait.

The Carabelli trait and its association with maxillary molar crown base and cusp size was studied in a group of 128 Kwengo, a San-Negro hybrid community living in Western Caprivi, Namibia. The trait was classified according to a modification of the scheme put forward by Dahlberg and by Scott (In: Dental Anthropology, New York: Pergamon, 1963) (Hum. Biol. 52:63-78, 1980). Crown base areas were larger in trait-positive than in trait-negative molars, and this difference existed for all eight categories of the trait in the first molar and for most of the categories in the second and third molars. The degree of expressivity of the trait seems to be associated with molar size, but this is more apparent in the first than in the second and third molars.

Adult↗
PubMed1975

Omnia mutantur.

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Education, Dental↗