Das diagnostische Set up - 1. Teil: Dentoalveoläre Diskrepanzen

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The theme "Diagnostic set up" (DSU) is presented in a series of 3 articles which are subdivided according to the principal symptom of the dental malformation: 1 dentoalveolar discrepancy, 2 basal discrepancy, 3 skeletal discrepancy. In the first article 3 objectives are discussed: the indication, the construction and the interpretation. - A DSU is indicated in those cases where there are several treatment alternatives such as different extraction possibilities. These cases demonstrate at least one of the following dentoalveolar characteristics: a) a previous history of extracted teeth (generally due to caries), b) avulsed missing teeth, c) congenitally missing teeth, d) crowding (usually accompanied by impacted teeth), e) tooth size discrepancy. - The construction of a DSU is outlined in 8 sequential steps: a) trimming (multiple sets of study models are trimmed so that each upper model will occlude identically with each lower model). b) Sequencing and marking (all teeth are sequentially numbered. A line corresponding to the long axis of the crown is extended to the mucogingival fold of all teeth which are to be moved orthodontically). c) midline (the anatomical upper midline is transferred by means of perpendiculars to the lower model). d) First vertical measurements (the initial position of those teeth with excessive vertical displacement is recorded by means of a gauge instrument). e) Separation (all teeth which will be moved orthodontically are detached from the model with the exception of the free end teeth, which remain as a key for the initial occlusion). f) Setting the lower dentition (the orthodontic framework is maintained by taking crossmeasurements. These measurements compare the initial and set up values for the antero-posterior and transverse dimensions). g) Second vertical measurement (the difference between the first - initial model - and second - DSU - vertical measurements should not exceed ±2 mm). h) Setting and settling of the upper dentition (same cross-measurements as mentioned under (f) are compared excluding the A-P dimension. The occlusion is developed according to the lower DSU). - The interpretation, is divided into 2 stages: a) Selecting the treatment choice (beginning with the intramaxillary interpretation, single and segmental tooth movements as well as anchorage requirements are evaluated. Then, for the intermaxillary interpretation, the occlusal relationship and interarch mechanics are considered. Now various treatment alternatives can be appraised and the most appropriate selected). b) Utilization in therapy (therapy is carried out based on the selected treatment choice).

Original languageGerman
Pages (from-to)141-156
Number of pages16
JournalFortschritte der Kieferorthopädie
Issue number2
StatePublished - Mar 1986
Externally publishedYes

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