{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T21:25:32Z","timestamp":1789593932916,"version":"build-2803163510"},"reference-count":31,"publisher":"Springer Science and Business Media LLC","issue":"3","license":[{"start":{"date-parts":[[2021,5,7]],"date-time":"2021-05-07T00:00:00Z","timestamp":1620345600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2021,5,7]],"date-time":"2021-05-07T00:00:00Z","timestamp":1620345600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["J Orofac Orthop"],"published-print":{"date-parts":[[2022,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec>\n                <jats:title>Purpose<\/jats:title>\n                <jats:p>The objective of this study was to investigate how daily wear time (DWT) influences class\u00a0II malocclusion treatment efficiency.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Materials and methods<\/jats:title>\n                <jats:p>The study group consisted of 55\u00a0patients (mean age 10.4\u00a0years) diagnosed with a\u00a0class\u00a0II\/1 malocclusion. Twin block appliances, with built-in Theramon\u00ae microsensors (MC Technology, Hargelsberg, Austria) to monitor patients\u2019 cooperation (daily wear time assessment), were used for treatment. Cephalograms were taken and the following initial and final measurements were compared: Co-Gn, Co-Go, Co-Olp, Pg-Olp, WITS, SNA, SNB, ANB, Co-Go-Me, overjet, molar and canine relationships. The Shapiro\u2013Wilk test, Wilcoxon signed-rank test, Student\u2019s\u00a0t-test, Levene\u2019s test, Mann\u2013Whitney\u00a0U\u00a0test, Kruskal\u2013Wallis test, \u03c7<jats:sup>2<\/jats:sup> test, and Spearman\u2019s rank correlation coefficient with <jats:italic>p<\/jats:italic>\u202f&lt;\u20090.05 set as the statistical significance level were used to determine the correlation of the outcomes with DWT; a\u00a0ROC (receiver operating characteristic) curve was calculated to illustrate diagnostic ability of the binary classifier system.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>DWT was very highly positively correlated with change of the Pg-Olp parameter and highly with an improvement in the ANB, SNA, and SNB angles, an increase in the WITS parameter and an increase in Co-Gn distance. DWTs\u202f&lt;\u20097.5\u202fh correlated with significantly less improvement of the investigated variables. However, DWT\u202f&gt;\u20097.5\u202fh did not significantly correlate with the improvement of the overjet and most of the linear parameters in the mandible. The ROC curve and its AUC (area under curve) allowed the determination of a\u00a0DWT of 7\u202fh and 48\u202fmin to be capable of establishing a\u00a0class\u00a0I relationship with 83% probability.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>Class\u00a0II treatment efficiency was influenced by DWT; an 8\u202fh threshold value had an 83% probability of establishing a class\u00a0I relationship.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00056-021-00300-7","type":"journal-article","created":{"date-parts":[[2021,5,7]],"date-time":"2021-05-07T15:03:09Z","timestamp":1620399789000},"page":"195-204","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Does daily wear time of Twin Block reliably predict its efficiency of class\u00a0II treatment?","Ist die t\u00e4gliche Tragedauer des Twin-Blocks ein zuverl\u00e4ssiger Pr\u00e4diktor f\u00fcr die Effizienz einer Klasse-II-Behandlung?"],"prefix":"10.1007","volume":"83","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2518-0007","authenticated-orcid":false,"given":"Michal","family":"Sarul","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marek","family":"Nahajowski","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Grzegorz","family":"Gawin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9192-1064","authenticated-orcid":false,"given":"Joanna","family":"Antoszewska-Smith","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,5,7]]},"reference":[{"key":"300_CR1","doi-asserted-by":"publisher","first-page":"53","DOI":"10.1007\/bf00844768","volume":"14","author":"JE Albino","year":"1991","unstructured":"Albino\u00a0JE, Lawrence\u00a0SD, Lopes\u00a0CE, Nash\u00a0LB, Tedesco\u00a0LA (1991) Cooperation of adolescents in orthodontic treatment. 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