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PubMedDate not supplied

The third molar question: to extract or not to extract.

Self-interest, moralists suggest, strongly influences people's behavior. To test the possible effect on dentists, we asked four groups--oral surgeons, periodontists, general practitioners, and orthodontists--to evaluate the need for removal of third molars in three cases. As expected, oral surgeons, who had the most to gain, recommended extraction at a significantly higher rate than the other groups. We found a direct hierarchical relationship between the degree of surgical orientation of a group and its likelihood to see a need for extraction.

Adolescent↗
PubMed1984

An histological investigation of invaginated human incisors.

The outlines of the invaginations resembled bottles with narrow necks directed at the incisal edge of the teeth. It is proposed that this form is genetically predetermined and that an active or passive infolding gives rise to the invaginations. In one case investigated out of six, an interruption of the dentin layer, surrounding the invagination, was found. This could become a susceptible site for post-eruptive bacterial invasion. In all cases, considerable amounts of enamel with normal structure were found in the invagination. The centrally positioned connective tissue was richly supplied with blood vessels and lined with layers of epithelial tissue, demonstrating various stages of an involutive enamel organ.

Dens in Dente↗
PubMed1980

The sequelae of surgical exposure of unerupted teeth.

The late effects of surgical exposure of unerupted teeth were analyzed. Of 121 teeth, 62 had only the crowns exposed; additional traction was applied to 31 teeth and 28 were repositioned. Postoperative observation time ranged from eight months to 13 years. One hundred and eleven teeth assumed their position in the arch and were deemed successfully treated; ten teeth failed to erupt. Of the successfully treated teeth, 23% showed biological aberrations such as obliteration of the pulp, dwarfed roots, and denervation. These pathophysiologic changes, alone or in combination, were commensurate with the amount of trauma inflicted on the teeth. Teeth that wer repositioned showed the most change, whereas teeth that only had crowns exposed showed the least change.

Dentin, Secondary↗