{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T23:56:15Z","timestamp":1790898975017,"version":"4.1.0"},"reference-count":29,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T00:00:00Z","timestamp":1790208000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T00:00:00Z","timestamp":1790208000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Oral Rehabilitation"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Low\u2010intensity, long\u2010duration clenching is considered more harmful to the stomatognathic system than high\u2010intensity, short\u2010duration clenching; however, their physiological effects under standardised EMG\u2010based contraction exposure remain unclear.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To compare the effects of low\u2010intensity, long\u2010duration (LL) and high\u2010intensity, short\u2010duration (HS) clenching on pressure pain threshold (PPT) and masseter muscle stiffness under standardised EMG\u2010based contraction exposure.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      Thirty\u2010six participants completed a randomised crossover study. They performed Task LL (10% maximum voluntary contraction [MVC] for 75\u2009s) and Task HS (50% MVC for 15\u2009s) on separate days, with a washout period of \u2265\u20097\u2009days. Each task comprised 30 sets with 15\u2010s rests, and equivalent prescribed contraction exposure (intensity \u00d7 duration \u00d7 sets). PPT and muscle stiffness were assessed at baseline and 0, 10, 20 and 30\u2009min post\u2010task. Data were analysed using mixed\u2010effects models with Bonferroni\u2010adjusted post hoc comparisons and baseline\u2010adjusted ANCOVA;\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.05 was considered significant.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      All participants (mean age 29.0\u2009\u00b1\u20096.6\u2009years; 50% female) completed the study. PPT immediately after LL was significantly lower than after HS (baseline\u2010adjusted mean difference, \u221211.5\u2009kPa;\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.026). Muscle stiffness showed a significant time effect only after HS (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). Immediately after HS, muscle stiffness was lower than baseline (mean difference, \u221222.4\u2009N\/m;\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001) and lower than after LL (baseline\u2010adjusted mean difference, \u221220.0\u2009N\/m;\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Under equivalent prescribed EMG\u2010based contraction exposure, PPT was lower after LL than after HS, whereas HS caused transient reductions in muscle stiffness, indicating pattern\u2010dependent responses.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/joor.70317","type":"journal-article","created":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T02:01:32Z","timestamp":1790301692000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Effects of Clenching Intensity and Duration on Pressure Pain Threshold and Masseter\u2010Muscle Stiffness Under Standardised\n                    <scp>EMG<\/scp>\n                    \u2010Based Contraction Exposure"],"prefix":"10.1111","author":[{"given":"Keisuke","family":"Miyazono","sequence":"first","affiliation":[{"name":"Department of Masticatory Function and Health Science, Graduate School of Medical and Dental Sciences Institute of Science Tokyo  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7518-8453","authenticated-orcid":false,"given":"Hiroyuki","family":"Ishiyama","sequence":"additional","affiliation":[{"name":"Department of Masticatory Function and Health Science, Graduate School of Medical and Dental Sciences Institute of Science Tokyo  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3146-425X","authenticated-orcid":false,"given":"Akira","family":"Nishiyama","sequence":"additional","affiliation":[{"name":"Department of General Dentistry, Graduate School of Medical and Dental Sciences Institute of Science Tokyo  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5885-2447","authenticated-orcid":false,"given":"Kenji","family":"Fueki","sequence":"additional","affiliation":[{"name":"Department of Masticatory Function and Health Science, Graduate School of Medical and Dental Sciences Institute of Science Tokyo  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,24]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41432-023-00911-6"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/joor.12011"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpor.2013.03.001"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.archoralbio.2018.02.021"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.4317\/jced.59480"},{"key":"e_1_2_11_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpor.2017.01.003"},{"issue":"4","key":"e_1_2_11_8_1","first-page":"653","article-title":"Trigger Points: Diagnosis and Management","volume":"65","author":"Alvarez D. 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