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How much incisor decompensation is achieved prior to orthognathic surgery?

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How much incisor decompensation is achieved prior to orthognathic surgery?

dc.contributor.author	McNeil, Calum	es
dc.contributor.author	McIntyre, Grant T.	es
dc.contributor.author	Laverick, Sean	es
dc.date.accessioned	2014-09-17T10:58:03Z
dc.date.available	2014-09-17T10:58:03Z
dc.date.issued	2014	es
dc.identifier.uri	http://hdl.handle.net/10550/37954
dc.source	McNeil, Calum ; McIntyre, Grant T. ; Laverick, Sean. How much incisor decompensation is achieved prior to orthognathic surgery?. En: Journal of Clinical and Experimental Dentistry, 2014, Vol. 6, No. 3: 225-229	es
dc.subject	Odontología	es
dc.subject	Ciencias de la salud	es
dc.title	How much incisor decompensation is achieved prior to orthognathic surgery?	es
dc.type	info:eu-repo/semantics/article	en
dc.type	info:eu-repo/semantics/publishedVersion	en
dc.subject.unesco	UNESCO::CIENCIAS MÉDICAS	es
dc.description.abstractenglish	Objectives: To quantify incisor decompensation in preparation for orthognathic surgery. Study design: Pre-treatment and pre-surgery lateral cephalograms for 86 patients who had combined orthodontic and orthognathic treatment were digitised using OPAL 2.1 [http://www.opalimage.co.uk]. To assess intra-observer reproducibility, 25 images were re-digitised one month later. Random and systematic error were assessed using the Dahlberg formula and a two-sample t-test, respectively. Differences in the proportions of cases where the maxillary (110 0 +/- 6 0 ) or mandibular (90 0 +/- 6 0 ) incisors were fully decomensated were assessed using a Chi-square test (p<0.05). Mann-Whitney U tests were used to identify if there were any differences in the amount of net decompen - sation for maxillary and mandibular incisors between the Class II combined and Class III groups (p<0.05). Results: Random and systematic error were less than 0.5 degrees and p<0.05, respectively. A greater proportion of cases had decompensated mandibular incisors (80%) than maxillary incisors (62%) and this difference was statis - tically significant (p=0.029). The amount of maxillary incisor decompensation in the Class II and Class III groups did not statistically differ (p=0.45) whereas the mandibular incisors in the Class III group underwent statistically significantly greater decompensation (p=0.02). Conclusions: Mandibular incisors were decompensated for a greater proportion of cases than maxillary incisors in preparation for orthognathic surgery. There was no difference in the amount of maxillary incisor decompensation between Class II and Class III cases. There was a greater net decompensation for mandibular incisors in Class III cases when compared to Class II cases.	es