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- Title
Objektive Bewertung der Behandlungsergebnisse beim Einsatz einer vollständig individuellen lingualen Apparatur.
- Authors
AlQatami, Fawzi M.; Alouini, Ons; Knösel, Michael; Helms, Hans-Joachim; Schwestka-Polly, Rainer
- Abstract
Objective: To assess the outcome quality of subjects treated with a completely customized lingual appliance (CCLA) in a postgraduate university program, using the ABO Objective Grading System (OGS), by testing the null-hypothesis of a significant proportion of post-treatment cases exceeding an adjusted ‚exam failure‘ threshold value of OGS = 24. Materials and Methods: This retrospective single-arm study included 66 consecutively debonded CCLA cases (m/f 19/47; mean age: 25.1 ± 9 years) treated at Hannover Medical School (MHH, Hannover, Germany). The discrepancy index (DI) was assessed on initial plaster casts. The OGS of the cast-radiograph evaluation was scored for both set-up and post-treatment casts, including the seven components of alignment/rotation, marginal ridges, buccolingual inclination, overjet, occlusal contacts, occlusal relationships and interproximal contacts, to parameterize differences between those. Results: DI score distribution (≥ 20, < 20) was 25 (37.9 %)/41 (62.1 %) subjects. Mean initial DI was 17.3 ± 8.5. Mean set-up OGS was 10.4 ± 4.4 (min-max: 3–21), mean final OGS was 17.7 ± 5.9 (min-max: 7–33), and the difference 7.3 (post-treatment - set-up) was statistically significant (p < 0.0001; 95 % CI [5.8, 8.7]). The null-hypothesis was rejected: A statistically significant proportion of the final casts (n = 58; 87.8 %) scored below OGS = 24 by exact binomial test (P < 0.0001; 95 % CI [77.5 %, 94.6 %]). The rate of a final OGS score < 24 was not significantly different (P = 0.98) between both DI (≥ 20, < 20) groups. Conclusions: The outcome quality of the CCLA treatment in this postgraduate university setting was high and therefore sufficient for a vast majority of treated cases to pass the ABO-OGS clinical examination.
- Subjects
MEDICAL schools; RADIOGRAPHS; DISCREPANCY theorem; PLASTER; OCCLUSAL adjustment; ROTATIONAL motion; RETROSPECTIVE studies; TREATMENT of malocclusion; CUSTOMIZATION; DENTISTRY; ORTHODONTICS
- Publication
Kieferorthopädie: die Zeitschrift für die Praxis, 2022, Vol 36, Issue 3, p209
- ISSN
0945-7917
- Publication type
Article