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Evaluation of vertical ramus osteotomy for the surgical correction of unilateral mandibular posterior vertical insufficiency: Long-term follow-up results

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  • Additional Information
    • Contributors:
      Service de chirurgie maxillo-faciale et stomatologie [CHU Nantes]; Centre hospitalier universitaire de Nantes (CHU Nantes); Service de Chirurgie Maxillo-Faciale [Nantes] (Clinique Jules-Vernes); Clinique Jules-Vernes [Nantes]; Ecole Centrale Paris; Regenerative Medicine and Skeleton research lab (RMeS); Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE); Université de Nantes (UN)-Université de Nantes (UN); Sarcomes osseux et remodelage des tissus calcifiés - Phy-Os [Nantes] (INSERM U1238); Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Bretagne Loire (UBL)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE)
    • Publication Information:
      Elsevier BV, 2020.
    • Publication Date:
      2020
    • Abstract:
      Unilateral posterior vertical insufficiency (PVI) is a growth defect of the mandibular condyle that results in a facial asymmetry. Various surgical procedures can be used to elongate the hypoplastic ramus. The aim of this study was to evaluate long-term aesthetic and architectural outcomes of vertical ramus osteotomy (VRO) in patients with unilateral PVI.Patients operated on with unilateral VRO were included in this retrospective study. Aesthetic and architectural parameters were evaluated on frontal photographs as well as on frontal and lateral cephalograms preoperatively, postoperatively, at 1-year and at the end of the follow-up.A total of 48 patients were analyzed. The aesthetic assessment revealed significant correction of the chin deviation (CD) and of the lip commissural line tilt after VRO (p1 = 0.0038 and p2 = 0.0067, respectively) with stable results. The architectural analysis revealed significant improvement in the maxillary and mandibular occlusal planes, as well as the chin deviation (p 0.0001). A tendency to relapse was noted for the mandibular canting and the CD during the follow-up. VRO allowed for a mean mandibular lengthening of 8.39 mm (ranging from 2.5 to 14 mm).VRO allows for immediate restoration of the symmetry of the lower third of the face in patients with unilateral PVI. A revisional procedure may be needed due to a tendency for the chin deviation to relapse.
    • ISSN:
      1010-5182
    • Accession Number:
      10.1016/j.jcms.2020.02.013
    • Accession Number:
      10.1016/j.jcms.2020.02.013⟩
    • Rights:
      OPEN
    • Accession Number:
      edsair.doi.dedup.....83a03790a9c58174a21d43997413b385