{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T14:46:30Z","timestamp":1790347590511,"version":"4.1.0"},"reference-count":50,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2019,8,23]],"date-time":"2019-08-23T00:00:00Z","timestamp":1566518400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100000646","name":"Japan Society for the Promotion of Science London","doi-asserted-by":"publisher","award":["15k11338"],"award-info":[{"award-number":["15k11338"]}],"id":[{"id":"10.13039\/501100000646","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Oral Rehabilitation"],"published-print":{"date-parts":[[2020,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Haemodynamics during recovery after teeth clenching is poorly understood.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To clarify factors influencing tissue blood oxygenation recovery after clenching with altered muscle activity and duration, but constant total muscle activity.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>The following tasks were based on constant maximum voluntary clenching (100% MVC): (a) 50% MVC\u00a0\u00d7\u00a030\u00a0seconds; (b) 30% MVC\u00a0\u00d7\u00a050\u00a0seconds; and (c) 10% MVC\u00a0\u00d7\u00a0150\u00a0seconds. Tissue oxygenated (oxy\u2010Hb), deoxygenated (deoxy\u2010Hb) and total haemoglobin (total\u2010Hb) were recorded using near\u2010infrared spectroscopy in the masseter muscle during recovery after each task. Participants rested for 30\u00a0seconds before each task; average resting values were set as baseline. Respective ratios to baseline at 20, 60, 120 and 180\u00a0seconds after each task were calculated; the tasks were compared at each time point using one\u2010way repeated\u2010measures ANOVA.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Oxy\u2010Hb and total\u2010Hb decreased and deoxy\u2010Hb increased during the tasks and recovered thereafter. For Task 3, not all values recovered to baseline, even after 180\u00a0seconds (oxy\u2010Hb: 96.85%, total\u2010Hb: 98.31%, deoxy\u2010Hb: 102.98%). Oxy\u2010Hb (after 180\u00a0seconds, Task 1\u2010Task 3:\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0&lt;\u00a0.001, Task 2\u2010Task 3:\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u00a0.013) and total\u2010Hb (after 180\u00a0seconds, Task 1\u2010Task 3:\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0&lt;\u00a0.001, Task 2\u2010Task 3:\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u00a0.005) were significantly lower, and deoxy\u2010Hb (after 180\u00a0seconds, Task 1\u2010Task 3:\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0&lt;\u00a0.001, Task 2\u2010Task 3:\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u00a0.005) was significantly higher for Task 3 than other tasks, at all times during and after recovery.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Despite the same total muscle activity, weak\u2010force, long\u2010duration clenching is more harmful than strong\u2010force, short\u2010duration clenching, suggesting a greater effect of awakening bruxism than sleep bruxism on myalgia.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/joor.12863","type":"journal-article","created":{"date-parts":[[2019,7,22]],"date-time":"2019-07-22T20:45:33Z","timestamp":1563828333000},"page":"19-26","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Evaluation of tissue oxygen saturation of the masseter muscle during standardised teeth clenching"],"prefix":"10.1111","volume":"47","author":[{"given":"Chiho","family":"Satokawa","sequence":"first","affiliation":[{"name":"Orthodontic Science, Graduate School Tokyo Medical and Dental University (TMDU) 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