Comparison of phosphocreatine concentration in the human masseter and medial pterygoid muscles by P-31-CSI

Citation
T. Kanayama et al., Comparison of phosphocreatine concentration in the human masseter and medial pterygoid muscles by P-31-CSI, J ORAL REH, 28(11), 2001, pp. 1075-1079
Citations number
17
Categorie Soggetti
Dentistry/Oral Surgery & Medicine
Journal title
JOURNAL OF ORAL REHABILITATION
ISSN journal
0305182X → ACNP
Volume
28
Issue
11
Year of publication
2001
Pages
1075 - 1079
Database
ISI
SICI code
0305-182X(200111)28:11<1075:COPCIT>2.0.ZU;2-G
Abstract
The aim of this study is to compare phosphocreatine (PCr) concentrations of human masseter and medial pterygoid muscles by a recently developed locali zed magnetic resonance spectroscopy (MRS) method, chemical shift imaging (C SI). The characteristic spectra of phosphorous metabolites including PCr an d P-ATP from the superficial part of the masseter (SM) and the deep part of the masseter (DM) and the medial pterygoid muscles (MPt) from 11 volunteer s, 20-27-year-old were obtained. The study clearly demonstrated higher PCr/ beta -ATP in the SM and MPt than in the DM both in mean values (P<0.01) and in individual subjects. The results indicate that SM and MPt are power pro ducers. There were no significant differences in the mean values of the PCr /<beta>-ATP ratios in SM and MPt, however, the PCr/beta -ATP ratios varied individually and the subjects could be divided into three distinct groups: values of MPt higher than SM (group A, 4 subjects); values of MPt almost eq ual to SM (group B, 3 subjects); and values of MPt lower than SM (group C, 4 subjects). There appears to be a close relationship between the PCr conte nt as determined in the groups here and occlusal guidance.