Judging orthodontic treatment complexity

Maïté CLIJMANS, Aly MEDHAT, An De GEEST, Johannes van GASTEL, Annelies KELLENS, Steffen FIEUWS, Guy WILLEMS

Objective: The aim of the present study was to investigate possible relations between anticipated overall treatment complexity (AOTC) of an orthodontic case and malocclusion characteristics. Methods: Two groups of orthodontists (groups A and B) were asked to define perceived treatment complexity (PTC) of orthodontic cases based on 16 characteristics of malocclusion by means of a questionnaire. Each question was answered on a six-point ordinal scale, with one “not applicable” option (score 0). Group A was also asked to give the AOTC of the specific case on a five-point ordinal scale. The index of orthodontic treatment need (IOTN) score of the specific cases as well as the malocclusion characteristics were assessed by one author. Results: There is a significant relationship between IOTN and AOTC (p < 0.0001), 22% of variability is explained by differences in IOTN. Adding objective characteristics of malocclusion to explain AOTC does not significantly increase the explained variability (p = 0.086). In judging interobserver agreement, a weighted Kappa of 0.60 for group A and 0.56 for group B was found. The weighted Kappa for agreement in AOTC equals 0.06. Conclusion: The relation between IOTN and AOTC was found to be significant. Moderate agreement on PTC among observers and a low level agreement regarding AOTC were found in the present study.

Keywords: Orthodontic treatment complexity. Orthodontic indices.

How to cite: Clijmans M, Medhat A, De Geest A, Van Gastel J, Kellens A, Fieuws S, Willems G. Judging orthodontic treatment complexity. Dental Press J Orthod. 2016 Jan-Feb;21(1):60-6. DOI: http://dx.doi.org/10.1590/2177-6709.21.1.060-066.oar

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