TY - JOUR
T1 - Adaptation of jaw closing muscles after surgical mandibular advancement procedures in different vertical craniofacial types: a magnetic resonance imaging study
AU - Dicker, G.J.
AU - van Spronsen, P.H.
AU - van Schijndel, R.
AU - van Ginkel, F.C.
AU - Manoliu, R.
AU - Boom, H.P.W.
AU - Tuinzing, D.B.
PY - 2007
Y1 - 2007
N2 - Objective: Surgical mandibular advancement influences the biomechanics of the mandible and as a result may provoke relapse. In this study, the adaptation of the masseter (MAS) and medial pterygoid muscles (MPM) after surgical mandibular advancement was evaluated. Study design: Of 12 patients with mandibular retrognathia and varying vertical craniofacial morphology, axial and 30° angulated magnetic resonance imaging (MRI) scan series were taken preoperatively and 10 to 48 months postoperatively. Using cluster analysis, subjects were assigned to a long-face (LF) and a short-face (SF) cluster. Subsequently, preoperative and postoperative maximum cross-sectional areas and volumes of the MAS and MPM were compared in these groups. Results: The cross-sectional area and volume of the MAS decreased significantly in both the SF and LF cluster (up to 18%). Although not significantly, this phenomenon tended to be more pronounced in LF patients. The cross-sectional area of the MPM showed less adaptation. Conclusion: The jaw-closing muscles become significantly smaller after surgical mandibular advancement, irrespective of the vertical craniofacial type. © 2007 Mosby, Inc. All rights reserved.
AB - Objective: Surgical mandibular advancement influences the biomechanics of the mandible and as a result may provoke relapse. In this study, the adaptation of the masseter (MAS) and medial pterygoid muscles (MPM) after surgical mandibular advancement was evaluated. Study design: Of 12 patients with mandibular retrognathia and varying vertical craniofacial morphology, axial and 30° angulated magnetic resonance imaging (MRI) scan series were taken preoperatively and 10 to 48 months postoperatively. Using cluster analysis, subjects were assigned to a long-face (LF) and a short-face (SF) cluster. Subsequently, preoperative and postoperative maximum cross-sectional areas and volumes of the MAS and MPM were compared in these groups. Results: The cross-sectional area and volume of the MAS decreased significantly in both the SF and LF cluster (up to 18%). Although not significantly, this phenomenon tended to be more pronounced in LF patients. The cross-sectional area of the MPM showed less adaptation. Conclusion: The jaw-closing muscles become significantly smaller after surgical mandibular advancement, irrespective of the vertical craniofacial type. © 2007 Mosby, Inc. All rights reserved.
UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33947579324&origin=inward
UR - https://www.ncbi.nlm.nih.gov/pubmed/17095268
U2 - https://doi.org/10.1016/j.tripleo.2006.07.003
DO - https://doi.org/10.1016/j.tripleo.2006.07.003
M3 - Article
C2 - 17095268
SN - 1079-2104
VL - 103
SP - 475
EP - 483
JO - Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontology
JF - Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontology
IS - 4
ER -