[Acceleration of orthodontically induced tooth movement through the local application of prostaglandin (PGE1)]. / Beschleunigung einer orthodontisch induzierten Zahnbewegung durch lokale Applikation von Prostaglandin (PGE1).

A preliminary study was designed to assess the effect of prostaglandin E1 on tooth movement. In 5 patients palatal attachments were bonded on corresponding upper left and right premolars which were to be extracted later in the course of routine orthodontic treatment. A transpalatal elastic exerted reciprocal force on the teeth. Following local anaesthesia, 0.1 ml of a 0.01% (w/v) PGE1 solution in saline was injected under the mucoperiosteum palatal to the test tooth and 0.1 ml saline palatal to the contralateral control tooth. Injections were repeated at weekly intervals. On average, the PGE1-treated teeth moved 3 times faster than the controls but the rate of movement differed individually. Clinical and x-ray examinations of the teeth involved in the study as well as the surrounding tissues showed no evidence of pathologic changes. No negative side effects were noticed by the patients. Despite positive experiences, this treatment is not to be recommended for use in dental offices yet.

[The incidence of plaque and gingivitis in schoolchildren of the Davos region]. / Plaque- und Gingivitisbefall bei Schulkindern in der landschaft Davos.

The aim of the present study was to collect basic material for planning and executing a program for the prevention of caries and gingival inflammation in children. A total of 275 schoolchildren aged 8, 10 and 12 years were examined by 3 calibrated examiners in Davos Dorf and Davos Platz. The degree of plaque was measured according to the Pl-I of Silness and Löe on all permanent teeth. Gingivitis was measured using the SB-I method according to Mühlemann and Son. Oral hygiene: the eight- and ten-year-old children from Davos Dorf exhibited a significantly smaller Pl-I than their counterparts in Davos Platz. A significantly different (p less than 0.02) oral hygiene was also found between girls and boys of age 12. Gingivitis: The degree of gingivitis was minimal in the youngest age group. A significantly greater inflammation (p less than 0.03) was found in the 10-year-old group from Davos Platz. There was no discernible difference measured in the 12-year-old group between Davos Dorf and Davos Platz, but there was a distinguishable difference observed between the sexes (p less than 0.02).