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Participants were divided into a treatment and a control group. After alignment and leveling with fixed orthodontic appliances using 0.019\u2009\u00d7\u20090.025-inch stainless-steel archwires, the FFRD was fitted. The overjet was corrected to achieve an edge-to-edge incisor relationship. Cone Beam Computed Tomography (CBCT) images were taken before (T1) and after (T2) the fixed functional phase. The TMJs were assessed for positional and dimensional osseous changes in the mandibular condyles, glenoid fossae, and joint spaces. Intra- and inter-group comparisons were conducted using paired t-tests and independent t-tests, respectively.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>The initial measurements of age, cervical stage, anteroposterior and vertical skeletal alignment, and TMJ parameters were similar between the study and control groups. Three participants from the study group were lost to follow-up, resulting in 17 participants completing the trial. In the treatment group, condylar width decreased significantly by 0.52\u2009\u00b1\u20090.92\u00a0mm, in contrast to an increase of 0.17\u2009\u00b1\u20090.35\u00a0mm in the control group (<jats:italic>P<\/jats:italic>\u2009=\u20090.010). Moreover, the anterior wall inclination in the treatment group was reduced by 3.13\u2009\u00b1\u200910.77 degrees, compared to an increase of 2.95\u2009\u00b1\u20094.1 degrees in the control group (<jats:italic>P<\/jats:italic>\u2009=\u20090.003). All other measurements displayed no significant differences between the two groups.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusion<\/jats:title>\n            <jats:p>In the short term, the FFRD redirected the growth of the articular eminence anteriorly, contrasting with the normal growth pattern of untreated individuals. However, no additional positional or dimensional changes in the TMJ were observed.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Clinical relevance<\/jats:title>\n            <jats:p>By aligning the jaw and correcting overjet, clinicians can potentially enhance occlusal relationships and contribute to better jaw function. However, it is important to investigate whether this process is associated with any changes in the bony structures of the TMJ. This study underscores the efficacy of the FFRD in reshaping the osseous components of the TMJ, which may lead to improved functional outcomes for patients with skeletal Class II malocclusion.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1007\/s00784-025-06474-3","type":"journal-article","created":{"date-parts":[[2025,8,18]],"date-time":"2025-08-18T01:54:08Z","timestamp":1755482048000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Positional and dimensional temporomandibular joint osseous changes in patients treated with the forsus fatigue resistant device: a non-randomized clinical trial\u00a0"],"prefix":"10.1007","volume":"29","author":[{"given":"Ramy","family":"Abdul-Rahman Ishaq","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maged S.","family":"Alhammadi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mona M.","family":"Salah Fayed","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sherif A.","family":"Elkordy","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Najah","family":"Alhashimi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Abeer A.","family":"Almashraqi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,8,18]]},"reference":[{"key":"6474_CR1","first-page":"134","volume":"26","author":"S Shalu","year":"2022","unstructured":"Shalu S, Rai R, Sudhakar SS, Kannan G (2022) Comparison of skeletal effects of forsus fatigue resistant device and powerscope treatment\u2013a cephalometric study. 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