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Mandibular Foramen Position Predicts Inferior Alveolar Nerve Location After Sagittal Split Osteotomy With a Low Medial Cut.
Hopper, Julia S; Sobol, Danielle L; Ettinger, Russell E; Susarla, Srinivas M.
Afiliación
  • Hopper JS; Student, Craniofacial Center, Seattle Children's Hospital, Divisions of Oral-Maxillofacial Surgery and Plastic-Craniofacial Surgery, Seattle, WA.
  • Sobol DL; Resident, Division of Plastic Surgery, Department of Surgery, University of Washington, Seattle, WA.
  • Ettinger RE; Assistant Professor, Craniofacial Center, Seattle Children's Hospital, Division of Plastic-Craniofacial Surgery, Seattle, WA.
  • Susarla SM; Assistant Professor, Craniofacial Center, Seattle Children's Hospital, Divisions of Oral-Maxillofacial Surgery and Plastic-Craniofacial Surgery, Seattle, WA. Electronic address: srinivas.susarla@seattlechildrens.org.
Artículo en Inglés | MEDLINE | ID: mdl-33031774
ABSTRACT

PURPOSE:

To evaluate whether the distance between the mandibular occlusal plane and mandibular foramen predicts inferior alveolar nerve (IAN) position after the sagittal split osteotomy (SSO) when using a low medial horizontal osteotomy (Posnick's modification).

METHODS:

This was a retrospective cohort study of patients undergoing bilateral SSOs with the medial osteotomy placed at the level of the mandibular occlusal plane. The primary predictor variable was the vertical distance between the mandibular foramen and mandibular occlusal plane. The primary outcome was IAN position after SSO contained within the proximal segment or freely entering the distal segment. Secondary predictor variables were age, gender, primary diagnosis, and type of surgery. Descriptive, bivariate, and regression statistics were computed.

RESULTS:

Thirty-one patients underwent 62 SSOs using a low medial cut; the sample's mean age was 19.6 ± 3.0 years, and 16 subjects were female. Twenty-three subjects had a primary diagnosis of craniofacial anomaly, and 26 subjects underwent bimaxillary surgery. The IAN was contained within the proximal segment in 28 SSOs (45.2%). The distance between the mandibular occlusal plane and mandibular foramen was greater in SSOs where the nerve was contained within the proximal segment (6.9 ± 2.5 mm) versus freely entering the distal segment (4.5 ± 2.7 mm, P < .001). A receiver-operator characteristic curve identified a threshold distance of greater than 5 mm as predictive of the IAN being contained within the proximal segment (sensitivity, 0.89; specificity, 0.85; area under the curve, 0.84; P < .001). When the mandibular foramen was greater than 5 mm above the mandibular occlusal plane, there was an increased odds of the IAN being contained within the proximal segment (odds ratio, 48.3; 95% confidence interval, 10.5, 222.8; P < .001).

CONCLUSIONS:

The distance between the mandibular occlusal plane and mandibular foramen predicts the position of the IAN after SSO when using a low medial horizontal osteotomy.
Texto completo: Disponible Colección: Bases de datos internacionales Base de datos: MEDLINE Tipo de estudio: Estudio observacional / Estudio pronóstico / Factores de riesgo Idioma: Inglés Año: 2020 Tipo del documento: Artículo

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Texto completo: Disponible Colección: Bases de datos internacionales Base de datos: MEDLINE Tipo de estudio: Estudio observacional / Estudio pronóstico / Factores de riesgo Idioma: Inglés Año: 2020 Tipo del documento: Artículo