BACKGROUND: Aging is associated with a decline in masticatory muscles mass and performance. The present study aims to examine the differences in the cross-sectional areas of the masseter, medial and lateral pterygoid muscles in relation to age and the present dental status in a population-based magnetic resonance imaging study. METHODS: This cross sectional study involved 747 subjects aged between 30-89 years (344 male, 403 female) who underwent both a whole body MRI and a full oral examination. The cross-sectional areas of the masseter, medial and lateral pterygoid muscles were measured from MRI images using the software Osirix. Dental and prosthetic status data from the oral examination were classified according to Eichner index. The method of generalized least squares, also called growth curve model, was used to examine the associations between the cross-sectional areas, age and tooth status. RESULTS: The cross-sectional area of the lateral pterygoid muscle decreased substantially with age in women but did not depend on age in men. The medial pterygoid muscle depended on age but an effect modification by gender was uncertain. Masseter muscle was weakly associated with age but strongly associated with the number of teeth in both genders. CONCLUSIONS: Our findings suggest that age has a heterogeneous effect on masticatory muscles. This indicates that age related changes to the masticatory muscles are muscle specific and are not consistent between the different muscles.
BACKGROUND: Aging is associated with a decline in masticatory muscles mass and performance. The present study aims to examine the differences in the cross-sectional areas of the masseter, medial and lateral pterygoid muscles in relation to age and the present dental status in a population-based magnetic resonance imaging study. METHODS: This cross sectional study involved 747 subjects aged between 30-89 years (344 male, 403 female) who underwent both a whole body MRI and a full oral examination. The cross-sectional areas of the masseter, medial and lateral pterygoid muscles were measured from MRI images using the software Osirix. Dental and prosthetic status data from the oral examination were classified according to Eichner index. The method of generalized least squares, also called growth curve model, was used to examine the associations between the cross-sectional areas, age and tooth status. RESULTS: The cross-sectional area of the lateral pterygoid muscle decreased substantially with age in women but did not depend on age in men. The medial pterygoid muscle depended on age but an effect modification by gender was uncertain. Masseter muscle was weakly associated with age but strongly associated with the number of teeth in both genders. CONCLUSIONS: Our findings suggest that age has a heterogeneous effect on masticatory muscles. This indicates that age related changes to the masticatory muscles are muscle specific and are not consistent between the different muscles.
Entities:
Keywords:
CSA; MRI; mastication; oral rehabilitation; prosthodontics; tooth loss
Authors: F A Fontijn-Tekamp; A P Slagter; A Van Der Bilt; M A Van 'T Hof; D J Witter; W Kalk; J A Jansen Journal: J Dent Res Date: 2000-07 Impact factor: 6.116
Authors: M C Raadsheer; T M Van Eijden; P H Van Spronsen; F C Van Ginkel; S Kiliaridis; B Prahl-Andersen Journal: Arch Oral Biol Date: 1994-12 Impact factor: 2.633
Authors: Norbert Hosten; Robin Bülow; Henry Völzke; Martin Domin; Carsten Oliver Schmidt; Alexander Teumer; Till Ittermann; Matthias Nauck; Stephan Felix; Marcus Dörr; Marcello Ricardo Paulista Markus; Uwe Völker; Amro Daboul; Christian Schwahn; Birte Holtfreter; Torsten Mundt; Karl-Friedrich Krey; Stefan Kindler; Maria Mksoud; Stefanie Samietz; Reiner Biffar; Wolfgang Hoffmann; Thomas Kocher; Jean-Francois Chenot; Andreas Stahl; Frank Tost; Nele Friedrich; Stephanie Zylla; Anke Hannemann; Martin Lotze; Jens-Peter Kühn; Katrin Hegenscheid; Christian Rosenberg; Georgi Wassilew; Stefan Frenzel; Katharina Wittfeld; Hans J Grabe; Marie-Luise Kromrey Journal: Healthcare (Basel) Date: 2021-12-24