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Article: Is there a difference between the thicknesses of the rami in mandibular asymmetry?

TitleIs there a difference between the thicknesses of the rami in mandibular asymmetry?
Authors
Keywordsmandible
orthognathic surgery
osteotomysagittal split ramus
facial asymmetry
cone beam computed tomography
Issue Date2021
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/ijom
Citation
International Journal of Oral and Maxillofacial Surgery, 2021, v. 50 n. 6, p. 791-797 How to Cite?
AbstractThe purpose of this retrospective study was to investigate whether the thicknesses of the two rami differ in patients with mandibular asymmetry. Preoperative cone beam computed tomography scans of 78 patients with mandibular asymmetry were assessed for ramus thickness, mandibular length, and mandibular shift. The results showed that the ramus was thinner on the longer side than on the shorter side in 85.9% of the patients. On average, the longer side of the mandible was 2.74 mm longer (range 0.07–9.90 mm, standard deviation 1.92 mm) and 0.55 mm thinner (range −0.61 to 2.02 mm, standard deviation 0.59 mm) than the shorter side (both P < 0.001). This study indicates a trend in the discrepancy in ramus thickness between the longer and shorter side of about 8% of the mean thickness of the ramus. Regression analysis showed that for every 1-mm increase in the length of the mandible, the thickness of the superior aspect of the ramus was reduced by 0.041 mm (P = 0.009) and the anterior aspect by 0.125 mm (P = 0.001). Age and sex did not have a significant influence on the thickness of the mandible. It is concluded that the longer side of the mandible tends to be thinner at the ramus than the shorter side in patients with mandibular asymmetry. The implication of this finding could be important in relation to the sagittal split ramus osteotomy.
Persistent Identifierhttp://hdl.handle.net/10722/297211
ISSN
2021 Impact Factor: 2.986
2020 SCImago Journal Rankings: 1.020
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYeung, AWK-
dc.contributor.authorWong, NSM-
dc.contributor.authorLi, DTS-
dc.contributor.authorLo, THY-
dc.contributor.authorLeung, YY-
dc.date.accessioned2021-03-08T07:15:44Z-
dc.date.available2021-03-08T07:15:44Z-
dc.date.issued2021-
dc.identifier.citationInternational Journal of Oral and Maxillofacial Surgery, 2021, v. 50 n. 6, p. 791-797-
dc.identifier.issn0901-5027-
dc.identifier.urihttp://hdl.handle.net/10722/297211-
dc.description.abstractThe purpose of this retrospective study was to investigate whether the thicknesses of the two rami differ in patients with mandibular asymmetry. Preoperative cone beam computed tomography scans of 78 patients with mandibular asymmetry were assessed for ramus thickness, mandibular length, and mandibular shift. The results showed that the ramus was thinner on the longer side than on the shorter side in 85.9% of the patients. On average, the longer side of the mandible was 2.74 mm longer (range 0.07–9.90 mm, standard deviation 1.92 mm) and 0.55 mm thinner (range −0.61 to 2.02 mm, standard deviation 0.59 mm) than the shorter side (both P < 0.001). This study indicates a trend in the discrepancy in ramus thickness between the longer and shorter side of about 8% of the mean thickness of the ramus. Regression analysis showed that for every 1-mm increase in the length of the mandible, the thickness of the superior aspect of the ramus was reduced by 0.041 mm (P = 0.009) and the anterior aspect by 0.125 mm (P = 0.001). Age and sex did not have a significant influence on the thickness of the mandible. It is concluded that the longer side of the mandible tends to be thinner at the ramus than the shorter side in patients with mandibular asymmetry. The implication of this finding could be important in relation to the sagittal split ramus osteotomy.-
dc.languageeng-
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/ijom-
dc.relation.ispartofInternational Journal of Oral and Maxillofacial Surgery-
dc.subjectmandible-
dc.subjectorthognathic surgery-
dc.subjectosteotomysagittal split ramus-
dc.subjectfacial asymmetry-
dc.subjectcone beam computed tomography-
dc.titleIs there a difference between the thicknesses of the rami in mandibular asymmetry?-
dc.typeArticle-
dc.identifier.emailYeung, AWK: ndyeung@hku.hk-
dc.identifier.emailLi, DTS: diontsli@hku.hk-
dc.identifier.emailLeung, YY: mleung04@hku.hk-
dc.identifier.authorityYeung, AWK=rp02143-
dc.identifier.authorityLi, DTS=rp02551-
dc.identifier.authorityLeung, YY=rp01522-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.ijom.2020.11.016-
dc.identifier.pmid33293148-
dc.identifier.scopuseid_2-s2.0-85097449638-
dc.identifier.hkuros321460-
dc.identifier.volume50-
dc.identifier.issue6-
dc.identifier.spage791-
dc.identifier.epage797-
dc.identifier.isiWOS:000656747300012-
dc.publisher.placeUnited Kingdom-

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