ObjectivesThe purpose of the present study was to evaluate skeletal stability after mandibular advancement with bilateral sagittal split osteotomy.Material and MethodsTwenty-six patients underwent single-jaw bilateral sagittal split osteotomy (BSSO) to correct skeletal Class II malocclusion. One group (n = 13) were treated postoperatively with skeletal elastic intermaxillary fixation (IMF) while the other group (n = 13) where threated without skeletal elastic IMF.ResultsThe mean advancement at B-point and Pog in the skeletal elastic IMF group was 6.44 mm and 7.22 mm, respectively. Relapse at follow-up at B-point was -0.74 mm and -0.29 mm at Pog. The mean advancement at B-point and Pog in the no skeletal elastic IMF group was 6.30 mm and 6.45 mm, respectively. Relapse at follow-up at B-point was -0.97 mm and -0.86 mm at Pog. There was no statistical significant (P > 0.05) difference between the skeletal IMF group and the no skeletal group regarding advancement nor relapse at B-point or Pog.ConclusionsBilateral sagittal split osteotomy is characterized as a stable treatment to correct Class II malocclusion. This study demonstrated no difference of relapse between the skeletal intermaxillary fixation group and the no skeletal intermaxillary fixation group. Because of selection-bias and the reduced number of patients it still remains inconclusive whether to recommend skeletal intermaxillary fixation or not in the prevention of relapse after mandibular advancement.

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Jans Nielsen) and Aarhus (Professor C. Krebs). MR. CHAIRMAN, Ladies and Gentlemen, I feel greatly pleased and honoured to be allowed to speak before this dignified-audience and thus to re-establish the connection between British and Danish ophthalmology, a connection which was previously so intimate and profitable. Danish ophthalmologists, among whom the best known are Bjerrum, Tscherning, Edmund Jensen, Heerfordt, Lundsgaard, and Roenne, are greatly indebted to British ophthalmologists, whose best known representatives with us are men like Young, M1ackenzie, Bowman, Priestley-Smith, Marcus Gunn and Duke-Elder. During the gloomy years of German occupation Dani-sh ophthalmology greatly missed the inspiration from British ophthalmology. Now that I stand here as the first Danish speaker after the war I

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