Rainer-Reginald Miethke1, Claudia Wronski. 1. Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, Charité Centrum für Zahn-, Mund- und Kieferheilkunde, Charité - Universitätsmedizin Berlin, Berlin, Germany. rainer-r.miethke@charite.de
Abstract
CLINICAL QUESTION: How effective is a therapy which relies solely on removable orthodontic appliances? PATIENTS: A group of 276 consecutive patients, whose mean age was 9.50 years, diagnosed with various types of malocclusion, whose records were complete, and who were treated solely with removable appliances. METHODS: Measurement of the PAR Index of the pre- and post-treatment study casts, standard statistical analyses, calculation of the correlation coefficients, and method error. RESULTS: The mean pre-treatment PAR score was 19.5, the mean post-treatment PAR score 5.9. In the PAR nomogram, 79% of the patients were classified as "improved", and 16% as "greatly improved". In contrast, 5% had to be classified as "worse/no different". The overall situation improved by a mean of 14 PAR points, corresponding to a mean improvement of 68%. CONCLUSION: Using the PAR Index as a standard, removable appliances can be used successfully to correct malocclusions, providing the indication is correct and the clinician's expertise in this field of the speciality is very high.
CLINICAL QUESTION: How effective is a therapy which relies solely on removable orthodontic appliances? PATIENTS: A group of 276 consecutive patients, whose mean age was 9.50 years, diagnosed with various types of malocclusion, whose records were complete, and who were treated solely with removable appliances. METHODS: Measurement of the PAR Index of the pre- and post-treatment study casts, standard statistical analyses, calculation of the correlation coefficients, and method error. RESULTS: The mean pre-treatment PAR score was 19.5, the mean post-treatment PAR score 5.9. In the PAR nomogram, 79% of the patients were classified as "improved", and 16% as "greatly improved". In contrast, 5% had to be classified as "worse/no different". The overall situation improved by a mean of 14 PAR points, corresponding to a mean improvement of 68%. CONCLUSION: Using the PAR Index as a standard, removable appliances can be used successfully to correct malocclusions, providing the indication is correct and the clinician's expertise in this field of the speciality is very high.
Authors: Timm Cornelius Schott; Lena Engelhard; David Gómez-Serrano; Hannes Meyer-Gutknecht Journal: J Orofac Orthop Date: 2011-11-30 Impact factor: 1.938