Mechanisms of LCF Injury

Version: 20240418

MECHANISM OF LCF INJURY

1. Direct

2. Indirect

3. Combined

DIRECT MECHANISM OF LCF INJURY

1. Bone fragment

2. Free joint bodies

3. Fixed joint bodies

4. Walls of the acetabular canal

5. Gunshot wound

6. Shrapnel wound

7. Hand surgical instrument

8. Drill

10. Pin

11. Bone fixator

12. Shaver

13. Ablater

14. Electrocautery

INDIRECT MECHANISM OF LCF INJURY

Rotational movement of the hip (pelvis fixed)

1. Adduction

2. Abduction

3. Pronation

4. Supination

5. Combination (adduction-pronation, abduction-supination...)

Linear movement of the femoral head (pelvis fixed)

1. Medially

2. Laterally

3. Upward (cranially)

4. Downward (caudally)

5. Forward

6. Backward

7. Combination

Rotational movement of the pelvis (femur fixed)

1. Downward tilt (adduction in the hip joint)

2. Upward tilt (abduction in the hip joint)

3. Forward rotation (pronation in the hip joint)

4. Backward rotation (supination in the hip joint)

5. Combination

Linear movement of the pelvis (femur fixed)

1. Medially

2. Laterally

3. Upward (cranially)

4. Downward (caudally)

5. Forward

6. Backward

7. Combination

COMBINED MECHANISM OF LCF INJURY

1. Dislocation of the femoral head (upper, lower, anterior, posterior, internal)

2. Subluxation of the femoral head (upper, lower, anterior, posterior, internal, external)

In combined LCF mechanisms, injury can occur due to bone fragments and as a result of simultaneous linear and rotational movement. Such injuries can be unintentional as well as intentional during the reduction of bone fragments, hip arthrotomy, approach to the acetabular part of the hip joint during arthroscopy, skeletal traction, or external fixation apparatus traction.

Keywords:

ligamentum capitis femoris, ligament of head of femur, round ligament, ligamentum teres, classification, pathology, injury, mechanism

In translating to English, the author is assisted by ChatGPT (version 3.5) and the Google Translate service.

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2025ArkhipovSV. Why Acetabular Labrum Repair May Be Ineffective

Original in Russian is available at the link: С.В. Архипова «Почему восстановление вертлужной губы может быть неэффективно?» (06.04.2025) , below is a machine translation edited by a non-native speaker (version dated 06/04/2025). Thematic Internet Journal About round ligament of femur April 2025 WHY ACETABULAR LABRUM REPAIR MAY BE INEFFECTIVE?: A NOTE ON THE MYSTERIOUS "DARK MATTER" OF THE HIP JOINT S.V. Arkhipov, Independent Researcher, Joensuu, Finland Abstract Acetabular labrum repair and reconstruction do not prevent hip joint instability during gait and the development of osteoarthritis in the case of an elongated ligamentum capitis femoris. This conclusion is based on mathematical calculations and analysis of experiments conducted on a mechanical hip joint model. Keywords : arthroscopy, hip joint, acetabular labrum, ligamentum capitis femoris, ligamentum teres, ligament of head of femur , reconstruction, repair Introduction Nearly 80% of primary hip ar...

LCF in 2025 (March)

LCF in 2025 ( March ): Quotes from articles and books published in March 2025 mentioning the ligamentum capitis femoris. Matsushita, Y., Sugiyama, H., Hayama, T., Sato, R., & Saito, M. (2025). Long-term Outcome of Pediatric Arthroscopic Surgery for Avulsion Fracture of the Ligamentum Teres: A Case Report. JBJS Case Connector , 15 (1), e25. [i] journals.lww.com Arkhipov, S. V. (2025). Inferior Portal for Hip Arthroscopy: A Pilot Experimental Study. Pt. 2. Inferior Portal Prototypes. About Round Ligament of Femur . February 26, 2025. [ii] researchgate . net Pfirrmann, C. W., & Kim, Y. J. (2025). Advanced Imaging. In Surgical Hip Dislocation: A Comprehensive Approach to Modern Hip Surgery (pp. 29-42). Cham: Springer Nature Switzerland. [iii] link.springer.com Singh, R., & Yadav, N. (2025). Morphometry and Morphology of the Fovea Capitis of the Femoral Head an...

ChatGPT. Scientific Review On the Article: “Why Acetabular Labrum Repair May Be Ineffective”

At our request, the language model ChatGPT, prepared to assist in the analysis and editing of texts by OpenAI, 2025, wrote a review of the article by Arkhipov SV. Why Acetabular Labrum Repair May Be Ineffective: A Note on the Mysterious ‘Dark Matter’ in the Hip Joint ([Ru] Архипов СВ . Почему восстановление вертлужной губы может быть неэффективно?: Заметка о таинственной «темной материи» в тазобедренном суставе. 06.04.2025 ). The original article was reviewed and edited based on the recommendations of Grok , an artificial intelligence developed by xAI. In accordance with the comments of both reviewers, the article was corrected and published. Below is the original text of the review by ChatGPT: Scientific Review and Critical Commentary On the article: “Why Acetabular Labrum Repair May Be Ineffective: A Note on the Mysterious ‘Dark Matter’ in the Hip Joint” Author: S.V. Arkhipov, Independent Researcher, Joensuu, Finland I. Scientific...

Grok. Review of the Article by S.V. Arkhipov "Why Restoration of the Acetabular Labrum May Be Ineffective?".

At our request, Grok, artificial intelligence developed by xAI, wrote a review of the article by Arkhipov SV. Why Acetabular Labrum Repair May Be Ineffective: A Note on the Mysterious ‘Dark Matter’ in the Hip Joint ([Ru] Архипов СВ . Почему восстановление вертлужной губы может быть неэффективно?: Заметка о таинственной «темной материи» в тазобедренном суставе. 06.04.2025 ). In accordance with the comments, the article was revised and sent for re-review to the ChatGPT language model prepared to assist in the analysis and editing of texts (OpenAI, 2025). Below is the original text of the review by Grok: Review of the Article by S.V. Arkhipov "Why Restoration of the Acetabular Labrum May Be Ineffective?: A Note on the Mysterious 'Dark Matter' of the Hip Joint". This review focuses on the analysis of argumentation, as requested. The author asserts that restoration of the acetabular labrum fails to prevent hip joint instability and osteoarthritis when the ligame...

1836-1840PartridgeR

«Prof. Partridge in his lectures on anatomy at King's College was accustomed to compare the Ligamentum Teres, in its function, to the leathern straps by which the body of a carriage is suspended on springs » ( 1874SavoryWS ). Perhaps Nikolai Pirogov listened to these lectures ( 1859PirogoffN ). The analogy that Richard Partridge used could have arisen after reading the monograph Bell J. The Principles of Surgery (1801) . In it, the author depicted a cart and a pelvis resting on the head of one and two femurs. However, there is no mention of ligamentum capitis femoris (LCF) in the chart descriptions. References Savory WS. On the use of the ligamentum teres of the hip joint. J Anat Physiol. 1874;8(2)291-6. [ ncbi.nlm.nih.gov , archive.org ] Pirogoff N. Anatome topographica sectionibus per corpus humanum congelatum triplici directione ductus illustrate. Petropoli: Typis Jacobi Trey, 1859. [ books.google , archive.org ] ...

2000-1600bcBM29663

Fragment of the text of clay tablet BM 29663 (Mesopotamia, 2000-1600 BC). In the list of body parts of a sheep, the author indicates ligamentum capitis femoris (LCF). See our commentary at the link: 2000-1600bcBM29663 [Rus]. Quote [Akk] Clay tablet BM 29663 (original source: photo - British Museum britishmuseum.org , text - 2018CohenY , p. 134). Translation [Eng] List of Sheep Body Parts ( с lay tablet BM 29663, obverse) 10. ni-im-šu → nimšu, “sciatic nerve”, “sinew” . ( original source: 2018CohenY , p. 135). ( original source: British Museum britishmuseum.org , CC BY-NC-SA 4.0) External links Clay tablet; museum number 29663; registration number 1898,1115.49. Middle East, Old Babylonian period (2000-1600 BC). [ britishmuseum.org , cdli.mpiwg-berlin.mpg.de ] Sigrist M, Zadok R, Walker C. Catalogue of the Babylonian tablets in the British Museum. Catalogue of the Babylonian tablets in the British Museum. London: British Museum Press, 2006. ...

1614PlatterF

Fragment from the book Platter F. Observationum (1614). The author notes the role of the ligamentum capitis femoris (LCF) in fixing the femur in the acetabulum and the possibility of its lengthening (synovitis) . Quote pp. 141-142 [Lat] Cruris dextri astrictio & contractio, post coxendicum dolorem. Cùm enim ligamentum illud articulum circumd ás, omnium totius corporis ligamentorum, quae articulos ambiunt, sit amplissimum; fieri potest, ut adeò cedat, ut (sicuti saepe sit) femoris caput, è suo sinu devoluatur, & in membranae illius (quae cùm erassissima sit, prae omnibus totius corporis ligamentis, nunquam vi qualicunque disrumpi potest) amplitudine seu capacitate subsistat, elongato simul & vehementer attracto, tereti illo & crasso, quod caput aliàs in suo sinu retinere solet, ligamento. Quod & ob tensionem illam nimiam, astrictum & induratum, chordae alicuius crasssissimae & firmisimae instar, quae nunquam disrumpi, nunquam ab acetabulo, cuius cartilag...

2025ArkhipovSV. Human Children

The monograph Arkhipov S.V. Human Children: The Origins of Biblical Legends from a Physician's Perspective. An essay with references to interactive materials. 2nd revised and expanded edition. Joensuu: Author's Edition, 2025. [In Russian]. The monograph dates the writing of the Book of Genesis and the events depicted in it, as well as refutes the authorship of Moses. I offer mutually beneficial cooperation (50/50) in literary translation into English or native language. Proofreading of machine translation and cooperation in editing are expected. Requirements for co-author: 1. Native speaker 2. Experience as a writer. E-mail: archipovsv(&)gmail.com Annotation The first version of the Book of Genesis appeared in Ancient Egypt approximately 3,600 years ago, during the Hyksos period. The work was conceived as a fairy tale epic. An unknown physician-encyclopedist, who is also presumed to have authored the Edwin Smith Papyrus, played a role in its composition...

EXTERNAL LIGAMENTS & LCF

external ligaments & LCF First experiments to study the interaction of the external ligaments and the ligamentum capitis femoris in a model: https://kruglayasvyazka.blogspot.com/2024/06/blog-post_6.html Pathological consequences of lengthening of the ligamentum capitis femoris: https://kruglayasvyazka.blogspot.com/2024/06/blog-post_63.html norm: https://kruglayasvyazka.blogspot.com/2024/06/blog-post_50.html #ligamentum_teres #ligamentum_capitis_femoris #hip #biomechanics Publication in the facebook group 03/27/2025. BLOG CONTE...

Online Journal «ABOUT ROUND LIGAMENT OF FEMUR», March 2025

The publication is dedicated to the ligamentum capitis femoris (LCF) and related topics. About the Journal »»» . The online journal « About Round Ligament of Femur » was created based on the scientific blog of the same name. The resource is the English-language part of the project: ONLINE JOURNAL: Ligamentum capitis femoris . Updates: As new materials are prepared. Purpose: Popularization and preservation of knowledge about LCF, as well as promoting its practical application. Main goal: Improvement of diagnosis, treatment, and prevention of injuries and diseases of the hip joint. Publisher: Arkhipov S.V., independent researcher, PhD, ortho...

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