Rezidiv und Stabilität nach transversaler Erweiterung der Zahnbögen – eine retrospektiv-longitudinale Studie

Rudzki, Ingrid; Klein, Ursula und Kirschneck, Christian (2017): Rezidiv und Stabilität nach transversaler Erweiterung der Zahnbögen – eine retrospektiv-longitudinale Studie. In: Informationen Aus Orthodontie und Kieferorthopaedie, Bd. 49, Nr. 4: S. 240-252

Abstract

Transversal, dento-alveolar expansions of dental arches are regularly performed in clinical practice without considering their long-term stability (long-term success). In a retrospective longitudinal study we thus evaluated the extent of transversal dento-alveolar changes during and after removable therapy with active arch expansion plates in 107 patients with mixed and early permanent dentition and optimal compliance (wear time 10-16 h/day). Orthodontic model series at start (AM) and end of treatment after retention (SM) as well as 0.6-6.2 years after retention (KM) allowed an assessment of relapse and long-term stability of the transversal expansion, which was quantified as intercanine distance (ICD-OK/UK) as well as anterior (4 +/- 4) and posterior (6 +/- 6) dental arch width. In the upper dental arch, on average 76 % (2.2 mm, ICD-OK), 55 % (1.4 mm, 4 + 4) and 56 % (1.8 mm, 6 + 6) of the transversal expansion remained stable long-term, whereas in the lower dental arch total relapse occurred regarding ICD-UK with a posterior permanent success of 40 % (0.8 mm, 4-4) and 66 % (2.1 mm, 6-6). An initially transversally constricted dental arch, an early start of therapy as well as extraction of premolars (ICD-OK) and initial crowding (ICD-UK) had positive effects on long-term success. Except for ICD-UK, dentoalveolar transversal expansion can thus be performed relatively successfully, however, with limited long-term stability.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Medizin
• Themengebiete: 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit
• ISSN: 0020-0336
• Sprache: Deutsch