{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T16:15:22Z","timestamp":1787156122991,"version":"build-2736575974"},"reference-count":27,"publisher":"MDPI AG","issue":"20","license":[{"start":{"date-parts":[[2025,10,13]],"date-time":"2025-10-13T00:00:00Z","timestamp":1760313600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Background and Objectives: Femoroacetabular impingement (FAI) morphology refers to structural abnormalities that can alter normal joint mechanics and potentially lead to early onset osteoarthritis. Although commonly diagnosed in symptomatic individuals, such morphological features are also found in asymptomatic adults, underlining their relevance for early detection and preventive management. This study aimed to evaluate the three-dimensional congruence of hip joint surfaces in relation to FAI and the morphology of asymptomatic hips with potential FAI features. Materials and Methods: Retrospective three-dimensional reconstructions of 86 hip joints were created using Mimics software from computed tomography (CT) scans of the lower abdomen and pelvis retrieved from the radiology archive. CT scans belonged to individuals with preserved anatomical integrity (20 females, 23 males, bilateral hips), aged 24\u201376 years. Lateral center-edge angle (LCEA) and alpha angle measurements were obtained from reconstructions to assess the risk of asymptomatic FAI. Results: Significant gender differences were found in alpha angles. The mean right alpha angle was 46.57 \u00b1 3.12\u00b0 in females and 49.28 \u00b1 6.66\u00b0 in males p = 0.046, while the mean left alpha angle was 43.75 \u00b1 5.53\u00b0 in females and 47.37 \u00b1 5.77\u00b0 in males p = 0.021. An alpha angle &gt;50\u00b0, suggestive of cam type FAI, was present in 25.6% of right hips and 13.9% of left hips. LCEA values showed no significant gender or side differences, with a mean of 30.21 \u00b1 8.96\u00b0 across the cohort. Conclusions: Three-dimensional evaluation of asymptomatic hips revealed FAI-consistent morphology in a notable proportion of individuals, particularly males. Cam-type deformities tended to occur bilaterally, whereas pincer-type morphologies were more sporadic and often unilateral. Increased alpha and LCEA measurements in asymptomatic individuals suggest that FAI morphology may exist subclinically without always indicating disease. Future studies incorporating longitudinal imaging and clinical follow-up are needed to clarify the prognostic significance of these findings.<\/jats:p>","DOI":"10.3390\/jcm14207220","type":"journal-article","created":{"date-parts":[[2025,10,15]],"date-time":"2025-10-15T11:57:42Z","timestamp":1760529462000},"page":"7220","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["How Common Is Femoroacetabular Impingement Morphology in Asymptomatic Adults? A 3D CT-Based Insight into Hidden Risk"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2631-496X","authenticated-orcid":false,"given":"Pelin","family":"\u0130smailo\u011flu","sequence":"first","affiliation":[{"name":"Department of Anatomy, Faculty of Medicine, Recep Tayyip Erdogan University, Rize 53020, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2121-4580","authenticated-orcid":false,"given":"Cengiz","family":"Kazdal","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics and Traumatology, Faculty of Medicine, Recep Tayyip Erdogan University, Rize 53020, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-1301-1048","authenticated-orcid":false,"given":"Emrehan","family":"Uysal","sequence":"additional","affiliation":[{"name":"Independent Researcher, Faculty of Medicine, Recep Tayyip Erdogan University, Rize 53020, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alp","family":"Bayramo\u011flu","sequence":"additional","affiliation":[{"name":"Department of Anatomy, Faculty of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul 34752, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,10,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"145","DOI":"10.2399\/ana.21.990828","article-title":"The frequency of the bony parameters of femoroacetabular impingement syndrome in young asymptomatic individuals: A computed tomography study","volume":"15","author":"Cengiz","year":"2021","journal-title":"Anatomy"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"37513","DOI":"10.52965\/001c.37513","article-title":"An updated review of femoroacetabular impingement syndrome","volume":"14","author":"Fortier","year":"2022","journal-title":"Orthop. Rev."},{"key":"ref_3","first-page":"123","article-title":"Femoroasetabular s\u0131k\u0131\u015fma sendromunda bilgisayarl\u0131 tomografi ve dijital dinamik de\u011ferlendirme","volume":"16","author":"Kayaalp","year":"2017","journal-title":"TOTB\u0130D Derg."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"2324","DOI":"10.1007\/s00167-014-3315-8","article-title":"Inter- and intra-observer agreement of femoroacetabular impingement (FAI) parameters comparing plain radiographs and advanced, 3D computed tomographic (CT)-generated hip models in a surgical patient cohort","volume":"24","author":"Cadet","year":"2014","journal-title":"Knee Surg. Sports Traumatol. Arthrosc."},{"key":"ref_5","first-page":"e55413","article-title":"Anatomical Mechanisms of Femoroacetabular Impingement and Its Role in the Progression to Hip Osteoarthritis: A Systematic Review","volume":"17","author":"Charmode","year":"2025","journal-title":"Cureus"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Anzillotti, G., Iacomella, A., Grancagnolo, M., Bertolino, E.M., Marcacci, M., Sconza, C., Kon, E., and Di Matteo, B. (2022). Conservative vs. Surgical Management for Femoro-Acetabular Impingement: A Systematic Review of Clinical Evidence. J. Clin. Med., 11.","DOI":"10.3390\/jcm11195852"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"126","DOI":"10.52827\/hititmedj.1339302","article-title":"Pop\u00fclasyon Temelli: Femoroasetabular Impingement De\u011ferlendirilmesi","volume":"6","author":"Kavak","year":"2024","journal-title":"Hitit Med. J."},{"key":"ref_8","first-page":"23","article-title":"Femoroasetabular s\u0131k\u0131\u015fmada direkt radyoloji","volume":"15","author":"Polat","year":"2016","journal-title":"TOTB\u0130D Derg."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"699","DOI":"10.1007\/s11999-008-0616-6","article-title":"Impingement-free hip motion: The \u2018normal\u2019 angle alpha after osteochondroplasty","volume":"467","author":"Neumann","year":"2009","journal-title":"Clin. Orthop. Relat. Res."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"17","DOI":"10.3352\/jeehp.2021.18.17","article-title":"Sample size determination and power analysis using the G* Power software","volume":"18","author":"Kang","year":"2021","journal-title":"J. Educ. Eval. Health Prof."},{"key":"ref_11","first-page":"15","article-title":"Radiological Assessment of Femoroacetabular Impingement Morphology Using Computed Tomography in Asymptomatic Young Population","volume":"89","author":"Koirala","year":"2025","journal-title":"Kathmandu Univ. Med. J."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1609","DOI":"10.1007\/s00330-017-5072-9","article-title":"Hip shape is symmetric, non-dependent on limb dominance and gender-specific: Implications for femoroacetabular impingement. A 3D CT analysis in asymptomatic subjects","volume":"28","author":"Mascarenhas","year":"2018","journal-title":"Eur. Radiol."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"2011","DOI":"10.1007\/s00330-016-4530-0","article-title":"Cam deformity and the omega angle, a novel quantitative measurement of femoral head-neck morphology: A 3D CT gender analysis in asymptomatic subjects","volume":"27","author":"Mascarenhas","year":"2017","journal-title":"Eur. Radiol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1097","DOI":"10.1007\/s40279-015-0339-2","article-title":"Etiology of femoroacetabular impingement in athletes: A review of recent findings","volume":"45","author":"Zadpoor","year":"2015","journal-title":"Sports Med."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"3749","DOI":"10.1177\/03635465231206815","article-title":"Soft tissue cam impingement in adolescents: MRI reveals impingement lesions underappreciated on radiographs","volume":"51","author":"Youngman","year":"2023","journal-title":"Am. J. Sports Med."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"146","DOI":"10.5334\/paah.472","article-title":"Effect of Integrative Balance and Plyometric Training on Balance, Ankle Mobility, and Jump Performance in Youth Football Players: A Randomized Controlled Trial","volume":"9","author":"Sinulingga","year":"2025","journal-title":"Phys. Act. Health"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"480","DOI":"10.1302\/2633-1462.64.BJO-2024-0198.R1","article-title":"Conservative Treatment versus Hip Arthroscopy in Patients with Femoroacetabular Impingement: A Multilevel Meta-Analysis of Randomized Controlled Trials","volume":"6","author":"Ramadanov","year":"2025","journal-title":"Bone Jt. Open"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1554","DOI":"10.1016\/j.arthro.2024.10.014","article-title":"Editorial Commentary: Timely Treatment of Femoroacetabular Impingement Syndrome Both Treats Ongoing Hip Symptoms and Mitigates Future Cartilage Damage and Osteoarthritis","volume":"41","author":"McCabe","year":"2025","journal-title":"Arthrosc. J. Arthrosc. Relat. Surg."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"298","DOI":"10.52312\/jdrs.2023.996","article-title":"The diagnosis of femoroacetabular impingement can be made on pelvis radiographs using deep learning methods","volume":"34","author":"Atalar","year":"2023","journal-title":"Jt. Dis. Relat. Surg."},{"key":"ref_20","first-page":"12","article-title":"Femoroasetabular \u0130mpingement Sendromunda Fizyoterapinin Etkinli\u011fi","volume":"2","author":"Tosun","year":"2022","journal-title":"Atlas J. Med."},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Lamontagne, M., Ng, K.C., Mantovani, G., and Catelli, D.S. (2014). Biomechanics of femoroacetabular impingement. Sports Injuries, Springer.","DOI":"10.1007\/978-3-642-36801-1_289-1"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"248","DOI":"10.1053\/j.oto.2010.09.015","article-title":"The biomechanics of femoroacetabular impingement","volume":"20","author":"Martin","year":"2010","journal-title":"Oper. Tech. Orthop."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"174","DOI":"10.1016\/j.arthro.2021.05.066","article-title":"Biomechanics of cam femoroacetabular impingement: A systematic review","volume":"38","author":"Yarwood","year":"2022","journal-title":"Arthrosc. J. Arthrosc. Relat. Surg."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Mentiplay, B.F., Kemp, J.L., Crossley, K.M., Scholes, M.J., Coburn, S.L., Jones, D.M., Silva, D.d.O., Johnston, R.T., Pazzinatto, M.F., and King, M.G. (2022). Relationship between hip muscle strength and hip biomechanics during running in people with femoroacetabular impingement syndrome. Clin. Biomech., 92.","DOI":"10.1016\/j.clinbiomech.2022.105587"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"853","DOI":"10.1002\/jor.26047","article-title":"Increased Risk of Femoral Neck Stress Fractures in Patients With Cam or Pincer Morphology","volume":"43","author":"Rynecki","year":"2025","journal-title":"J. Orthop. Res."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Kuhns, B.D., Frank, R.M., and Pulido, L. (2015). Open and arthroscopic surgical treatment of femoroacetabular impingement. Front. Surg., 2.","DOI":"10.3389\/fsurg.2015.00063"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"321","DOI":"10.1007\/s00402-016-2621-7","article-title":"3D Computer graphical anatomy study of the femur: A basis for a new nail design","volume":"137","author":"Schmutz","year":"2017","journal-title":"Arch. Orthop. Trauma Surg."}],"container-title":["Journal of Clinical Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2077-0383\/14\/20\/7220\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,15]],"date-time":"2025-10-15T12:19:27Z","timestamp":1760530767000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2077-0383\/14\/20\/7220"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,10,13]]},"references-count":27,"journal-issue":{"issue":"20","published-online":{"date-parts":[[2025,10]]}},"alternative-id":["jcm14207220"],"URL":"https:\/\/doi.org\/10.3390\/jcm14207220","relation":{},"ISSN":["2077-0383"],"issn-type":[{"value":"2077-0383","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,10,13]]}}}