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Neto JBDA, Cavalcante MLC, Messias da Rocha PH, Helito CP, Lima LLD, Ariel de Lima D. Study of the nerve endings and mechanoreceptors of the medial meniscotibial ligament of the knee: A structural and distribution analysis. Knee 2023. [PMID: 36863118 DOI: 10.1016/j.knee.2023.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
BACKGROUND The aim of the present study is to describe the morphology and distribution of the nerve endings of the meniscotibial ligament (MTL) of the knee, in order to understand the interaction between the proprioceptive system and knee mechanics. METHODS Twenty medial MTLs were obtained from deceased organ donors. The ligaments were measured, weighed and cut. Sections (10 mm) were prepared on hematoxylin and eosin-stained slides for analysis of tissue integrity, and 50 mm sections were submitted to immunofluorescence with the protein gene product (PGP) 9.5 as primary antibody and Alexa Fluor 488 as secondary antibody, followed by microscopic analysis. RESULTS The medial MTL was identified in 100% of the dissections, with average length, width, thickness and weight of 7.07 ± 1.34 mm, 32.25 ± 3.09 mm, 3.53 ± 0.27 mm and 0.67 ± 0.13 g, respectively. The hematoxylin and eosin-stained histological sections exhibited typical ligament structure, with dense well-organized collagen fibers and vascular tissue. All the specimens analyzed contained type I (Ruffini) mechanoreceptors and free (type IV) nerve endings, varying from parallel to intertwined fibers. Nerve endings not classified with different irregular shapes were also found. Most type I mechanoreceptors were found close to the MTL insertions on the tibial plateau, while the free nerve endings were found adjacent to the capsule. CONCLUSION The medial MTL showed a peripheral nerve structure, primarily type I and IV mechanoreceptors. These findings suggest that the medial MTL is important for proprioception and medial knee stabilization.
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de Lima LL, Ariel de Lima D, Freire THB, Almeida FAA, Leite JAD, Cavalcante MLC. Analysis of Mechanoreceptors and Free Nerve Endings of the Transverse Carpal Ligament. Hand (N Y) 2023; 18:62S-70S. [PMID: 35034484 PMCID: PMC9896282 DOI: 10.1177/15589447211066974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Background: The treatment of carpal tunnel syndrome (CTS) by sectioning the transverse carpal ligament (TCL) is not exempt from complications. Some nerve branches may be damaged by the incision. The aim of this study is to identify and map the TCL nerve endings, serving as a guide for sectioning this structure in a zone with less nerve ending density. Methods: Ten TCLs were obtained from fresh frozen cadavers. The TCLs were measured, divided into 3 equal bands (radial, central, and ulnar), and submitted to cryostat sectioning. The sections were subjected to immunofluorescence with the protein gene product (PGP) 9.5 and confocal microscopy analysis. Results: All the specimens contained type I and type IV mechanoreceptors. Neural elements occupied 0.695 ± 0.056% of the ligament area. The density of the neural elements was greater in the radial, followed by the ulnar and central bands, with 0.730 ± 0.083%, 0.686 ± 0.009%, and 0.669 ± 0.031%, respectively. Conclusion: The present findings suggest that the region with the least potential for neural element injury during TCL release is the central third near the transition with the ulnar third. When performed distally to proximally with a slight inclination from the radial to the ulnar, this release compromises the lowest nerve element density. Topographically, the proximal limit of the release is the distal wrist crease, while the distal limit is the intersection of Kaplan cardinal line and the axis of the third webspace.
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Affiliation(s)
- Lana L. de Lima
- Universidade Federal Rural do
Semi-Árido, Mossoró, Brazil
- Universidade Federal do Ceará,
Fortaleza, Brazil
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Laboudie P, Douiri A, Bouguennec N, Biset A, Graveleau N. Combined ACL and ALL reconstruction reduces the rate of reoperation for graft failure or secondary meniscal lesions in young athletes. Knee Surg Sports Traumatol Arthrosc 2022; 30:3488-3498. [PMID: 35364738 DOI: 10.1007/s00167-022-06956-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 03/18/2022] [Indexed: 12/25/2022]
Abstract
PURPOSE Graft failure and secondary meniscal tears are major concerns after anterior cruciate ligament (ACL) reconstruction in young athletes. The aim was to evaluate the link between ACL reconstruction with and without anterolateral ligament (ALL) reconstruction and outcomes in young patients participating in pivoting sports. METHODS This was a retrospective study of data collected prospectively. Patients less than 20 years, involved in pivoting sports and undergoing primary ACL reconstruction with a quadruple hamstring tendon (4HT) graft or 4HT graft combined with anterolateral ligament reconstruction (4HT + ALL) were included. Survival analysis was performed to identify the prognostic indicators for reoperation due to graft failure or secondary meniscal lesions. Knee laxity was assessed and patient reported outcome measures (PROMs) were collected. RESULTS A total of 203 patients (mean (± SD) age: 16.3 ± 2 years) with a mean follow-up of 4.8 ± 0.9 (range: 3.3‒6.8) years were included. There were 101 4HT and 102 4HT + ALL grafts. Graft rupture rates were 11.9% for 4HT grafts and 5.8% for 4HT + ALL grafts (n.s.). There were 9.9% secondary meniscal procedures for 4HT grafts vs. 1.9% for 4HT + ALL grafts (p = 0.02). With reoperation for graft failure or secondary meniscal lesions at final follow-up as the endpoint, survival was better in the 4HT + ALL group (91.4% vs. 77.8%, respectively; p = 0.03). Absence of ALL reconstruction (HR = 4.9 [95%CI: 1.4-17.9]; p = 0.01) and preoperative side-to-side laxity > 3 mm (HR = 3.1 [95%CI: 1.03-9.1]; p = 0.04) were independently associated with an increased rate of reoperations. Mean (± SD) side-to-side laxity was 1.3 ± 1.3 mm (range: - 2 to 5) for 4HT grafts vs. 0.9 ± 1.3 mm (range: - 6 to 4.8) for 4HT + ALL grafts (n.s.) 6 months post-surgery. The rate of return to the same sport at the same level was 42.2% for 4HT grafts vs. 52% for 4HT + ALL grafts (n.s.). There was no significant difference in subjective outcomes including PROMs between the two groups. CONCLUSION Combined ALL + ACL reconstruction reduced the rate of graft failure and secondary meniscal injury in young athletes when compared to ACL reconstruction alone. Subjective results were comparable, with a similar rate of complications. Combined reconstruction should be preferred in this young population. LEVEL OF EVIDENCE Level IV.
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Affiliation(s)
- Pierre Laboudie
- Clinique du Sport de Bordeaux-Mérignac, 4 rue George Negrevergne Merignac, 33700, Bordeaux, France.
| | - Adil Douiri
- Clinique du Sport de Bordeaux-Mérignac, 4 rue George Negrevergne Merignac, 33700, Bordeaux, France
| | - Nicolas Bouguennec
- Clinique du Sport de Bordeaux-Mérignac, 4 rue George Negrevergne Merignac, 33700, Bordeaux, France
| | - Alexandre Biset
- Clinique du Sport de Bordeaux-Mérignac, 4 rue George Negrevergne Merignac, 33700, Bordeaux, France
| | - Nicolas Graveleau
- Clinique du Sport de Bordeaux-Mérignac, 4 rue George Negrevergne Merignac, 33700, Bordeaux, France
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Novaes M, Carvalho A, Sauer JF, Brech GC, Helito CP, João SMA. Postural control during single leg stance in individuals with clinical indication for combined reconstruction of the anterior cruciate and the anterolateral ligaments of the knee: a cross-sectional study. BMC Musculoskelet Disord 2022; 23:383. [PMID: 35468775 PMCID: PMC9040202 DOI: 10.1186/s12891-022-05347-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 04/19/2022] [Indexed: 11/30/2022] Open
Abstract
Background Several studies have shown persistent postural control deficits and rotatory instability in patients after isolated Anterior Cruciate Ligament (ACL) reconstruction. There is evidence to support that the Anterolateral Ligament (ALL) plays an important role in the remaining anterolateral rotatory laxity of the knee. There are no further evidences in order to understand how patients with a combined ACL + ALL reconstruction surgery indication behave regarding postural control. The aim of this cross-sectional study was to assess if patients with a clinical indication for the combined ACL + ALL surgery showed a deficient postural control in single leg stance compared to subjects with a regular ACL reconstruction indication and to a control group. Methods An assessment of static postural control on single leg stance was performed on a force plate, with eyes open and closed, and the center of pressure (COP) displacement variables were analyzed: maximum and mean amplitude in anteroposterior (AP) and in mediolateral (ML) direction; mean velocity of displacement and area of displacement. Eighty-nine male individuals participated and were divided into 3 groups: ACL Group, ACL + ALL Group and Control Group. Results The ACL+ ALL Group showed significantly greater COP displacement in most variables in the injured leg for the eyes closed test, compared to the ACL Group, as detailed: Total ML displacement (9.8 ± 6.77 vs. 13.98 ± 6.64, p < 0.001); Mean ML displacement (2.58 ± 2.02 vs. 3.72 ± 1.99, p < 0.001); Total AP displacement (9.5 ± 3.97 vs. 11.7 ± 3.66, p = 0.001); Mean AP displacement (1.77 ± 0.87 vs. 2.27 ± 0.86, p = 0.001); Area of displacement (111.44 ± 127.3 vs. 183.69 ± 131.48, p < 0.001). Conclusion Subjects with a clinical indication for ACL + ALL combined reconstruction surgery showed increased COP displacement compared to patients with indication for an ACL isolated reconstruction surgery.
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Affiliation(s)
- Marilia Novaes
- Physical Therapy Service, Instituto de Ortopedia e Traumatologia, Hospital das clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, 333 Ovidio Pires de Campos St, São Paulo, SP, Zip Code: 05403-010, Brazil. .,Department of Physical Therapy, Speech and Occupational Therapy, Universidade de São Paulo, São Paulo, SP, Brazil.
| | - Adriana Carvalho
- Physical Therapy Service, Instituto de Ortopedia e Traumatologia, Hospital das clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, 333 Ovidio Pires de Campos St, São Paulo, SP, Zip Code: 05403-010, Brazil.,Department of Physical Therapy, Speech and Occupational Therapy, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Juliana F Sauer
- Physical Therapy Service, Instituto de Ortopedia e Traumatologia, Hospital das clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, 333 Ovidio Pires de Campos St, São Paulo, SP, Zip Code: 05403-010, Brazil.,Department of Physical Therapy, Speech and Occupational Therapy, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Guilherme C Brech
- Physical Therapy Service, Instituto de Ortopedia e Traumatologia, Hospital das clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, 333 Ovidio Pires de Campos St, São Paulo, SP, Zip Code: 05403-010, Brazil
| | - Camilo P Helito
- Knee Surgery Division, Instituto de Ortopedia e Traumatologia, Hospital das clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Silvia M A João
- Department of Physical Therapy, Speech and Occupational Therapy, Universidade de São Paulo, São Paulo, SP, Brazil
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Banios K, Raoulis V, Fyllos A, Chytas D, Mitrousias V, Zibis A. Anterior and Posterior Cruciate Ligaments Mechanoreceptors: A Review of Basic Science. Diagnostics (Basel) 2022; 12:diagnostics12020331. [PMID: 35204424 PMCID: PMC8870829 DOI: 10.3390/diagnostics12020331] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/29/2021] [Accepted: 01/25/2022] [Indexed: 02/06/2023] Open
Abstract
Proprioception is a specialized sensory modality encompassing the movement of the joint and its position in space, and it involves the conversion of mechanical deformation of tissues into neural signals. Mechanoreceptors are specialized nerve structures able to transmit mechanical deformation through electrical signals to dorsal root ganglion sensory neurons and are abundant in the muscles, tendons and ligaments of the knee joint. They are believed to play an important role in knee proprioception and dynamic knee stability. Proprioception should always be taken into consideration for successful reconstruction of the cruciate-deficient knee and for pain and function management in the arthritic knee. Advances in histological methods of detection are numerous and continue to highlight the presence and role of mechanoreceptors after ligament reconstruction, depending on choice of graft. In this review, we present the current knowledge of anterior and posterior cruciate ligaments and grafts mechanoreceptors, and their role in proprioception of knee joint, focusing on each type of mechanoreceptors.
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Affiliation(s)
- Konstantinos Banios
- Department of Orthopedic Surgery, General Hospital of Karditsa, Peripheral Road Karditsa-Kastania, 43100 Karditsa, Greece;
- Laboratory of Anatomy, Department of Medicine, School of Health Sciences, University of Thessaly, 3 University Street, Biopolis, 41110 Larissa, Greece; (V.R.); (A.F.); (V.M.)
| | - Vasileios Raoulis
- Laboratory of Anatomy, Department of Medicine, School of Health Sciences, University of Thessaly, 3 University Street, Biopolis, 41110 Larissa, Greece; (V.R.); (A.F.); (V.M.)
| | - Apostolos Fyllos
- Laboratory of Anatomy, Department of Medicine, School of Health Sciences, University of Thessaly, 3 University Street, Biopolis, 41110 Larissa, Greece; (V.R.); (A.F.); (V.M.)
| | - Dimitrios Chytas
- Department of Physiotherapy, University of Peloponnese, 20 Plateon Street, 23100 Sparta, Greece;
| | - Vasileios Mitrousias
- Laboratory of Anatomy, Department of Medicine, School of Health Sciences, University of Thessaly, 3 University Street, Biopolis, 41110 Larissa, Greece; (V.R.); (A.F.); (V.M.)
- Department of Orthopedic Surgery, University of Thessaly, 3 University Street, Biopolis, 41110 Larissa, Greece
| | - Aristeidis Zibis
- Laboratory of Anatomy, Department of Medicine, School of Health Sciences, University of Thessaly, 3 University Street, Biopolis, 41110 Larissa, Greece; (V.R.); (A.F.); (V.M.)
- Correspondence:
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Ariel de Lima D, de Lima LL, de Souza NGR, de Moraes Perez RA, Sobrado MF, Guimarães TM, Helito CP. Clinical outcomes of combined anterior cruciate ligament and anterolateral ligament reconstruction: a systematic review and meta-analysis. Knee Surg Relat Res 2021; 33:33. [PMID: 34556187 PMCID: PMC8461945 DOI: 10.1186/s43019-021-00115-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 09/08/2021] [Indexed: 01/04/2023] Open
Abstract
OBJECTIVES To compare the clinical outcomes of isolated anterior cruciate ligament (ACL) reconstruction with combined reconstruction of the ACL and anterolateral ligament (ALL) of the knee. METHODS A search was conducted on the PubMed, Medline, Google Scholar, EMBASE, and Cochrane library databases, in line with the PRISMA protocol. The indexation terms used were "anterior cruciate ligament" OR "acl" AND "anterolateral ligament" AND "reconstruction." Articles that compared patients submitted to combined ACL and ALL reconstruction with those submitted to isolated reconstruction of the ACL, with levels of evidence I, II, and III, were included. Studies with follow-up of less than 2 years and articles that did not use "anatomical" techniques for ALL reconstruction, such as extraarticular tenodesis, were excluded. A meta-analysis with R software was conducted, with a random effects model, presented as risk ratio (RR) or mean difference (MD), with a 95% confidence level (CI) and statistically significant at p < 0.05. RESULTS Ten articles were selected, with a total of 1495 patients, most of whom were men, of whom 674 submitted to ACL and ALL reconstruction and 821 to isolated ACL reconstruction. Combined ACL and ALL reconstruction exhibited a statistically significant advantage in residual pivot shift (RR 0.34, 95% CI 0.24-0.47, I2 = 0%, p < 0.01), rerupture rate (RR 0.34, 95% CI 0.19-0.62, I2 = 0%, p < 0.01), Lachman test (RR 0.59, 95% CI 0.40-0.86, I2 = 21%, p < 0.01), and postoperative Lysholm score (MD 2.28, CI 95% 0.75-3.81, I2 = 73%, p < 0.01). CONCLUSIONS Combined ACL and ALL reconstruction obtained better postoperative clinical outcomes when compared with isolated ACL reconstruction, especially in reducing residual pivot shift and rerupture rate.
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Affiliation(s)
- Diego Ariel de Lima
- UFERSA, Universidade Federal Rural do Semi-Árido, R. Francisco Mota, 572, Pres. Costa e Silva, Mossoró, RN, CEP: 59625-900, Brazil. .,Hospital Tarcísio Maia, Mossoró, Brazil.
| | - Lana Lacerda de Lima
- UFERSA, Universidade Federal Rural do Semi-Árido, R. Francisco Mota, 572, Pres. Costa e Silva, Mossoró, RN, CEP: 59625-900, Brazil.,Hospital Tarcísio Maia, Mossoró, Brazil
| | | | | | - Marcel Faraco Sobrado
- USP, Grupo de Joelho, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.,Hospital Sírio Libanês, São Paulo, Brazil
| | - Tales Mollica Guimarães
- USP, Grupo de Joelho, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Camilo Partezani Helito
- USP, Grupo de Joelho, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.,Hospital Sírio Libanês, São Paulo, Brazil
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Helito CP, Sobrado MF, Giglio PN, Bonadio MB, Pécora JR, Gobbi RG, Camanho GL. Surgical Timing Does Not Interfere on Clinical Outcomes in Combined Reconstruction of the Anterior Cruciate Ligament and Anterolateral Ligament: A Comparative Study With Minimum 2-Year Follow-Up. Arthroscopy 2021; 37:1909-1917. [PMID: 33539981 DOI: 10.1016/j.arthro.2021.01.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 01/15/2021] [Accepted: 01/17/2021] [Indexed: 02/02/2023]
Abstract
PURPOSE To compare the functional outcomes, knee stability, failure rate and complication rates of combined anterior cruciate ligament (ACL) and anterolateral ligament (ALL) reconstruction with hamstrings grafts between acute and chronic cases. METHODS Consecutive patients who underwent combined ACL and ALL reconstruction with hamstrings grafts were evaluated. Patients operated on less than 8 weeks after injury were allocated to group 1, and the others were allocated to group 2. Demographic data, knee stability, and functional outcomes of the 2 groups were evaluated. RESULTS Thirty-four patients in the acute group and 96 in the chronic group were evaluated. The follow-up time was similar between the groups (28.7 ± 5.2 [24-43] months vs 29.4 ± 7.2 [24-58] months; P = 0.696). No differences were found between the groups in age, sex, trauma mechanism, presence of knee hyperextension, graft diameter, and meniscal injuries. There was no difference between the groups in the postoperative KT-1000 and in the pre- or postoperative pivot shift. The preoperative KT-1000 was higher in group 2 (7.9 ± 1.1 vs 7.4 ± 1.2; P = 0.031). There were no differences in the International Knee Documentation Committee or Lysholm. Three (2.3%) patients developed failure, 1 (2.9%) in group 1 and 2 (2.1%) in group 2. The total complication rate was 10% and did not differ between the groups. CONCLUSIONS Combined ACL and ALL reconstruction has similar outcomes in patients undergoing surgery in the acute and chronic phases. Patients with chronic injury have similar knee stability, functional scores, and failure rates as acute-injury patients, and patients with acute injury have no more complications than chronic patients. LEVEL OF EVIDENCE Level III, retrospective comparative therapeutic trial.
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Affiliation(s)
- Camilo Partezani Helito
- Grupo de Joelho, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo; Hospital Sírio Libanês, São Paulo, Brazil
| | - Marcel Faraco Sobrado
- Grupo de Joelho, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo; Hospital Sírio Libanês, São Paulo, Brazil.
| | - Pedro Nogueira Giglio
- Grupo de Joelho, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo
| | - Marcelo Batista Bonadio
- Grupo de Joelho, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo
| | - José Ricardo Pécora
- Grupo de Joelho, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo
| | - Riccardo Gomes Gobbi
- Grupo de Joelho, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo
| | - Gilberto Luis Camanho
- Grupo de Joelho, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo
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Koc BB, Jansen EJP, van Dijk P, Emans PJ, Lataster A. Mechanoreceptors observed in a ligamentous structure between the posterior horn of the lateral meniscus and the anterior cruciate ligament. Knee Surg Sports Traumatol Arthrosc 2021; 29:1701-1708. [PMID: 32740878 DOI: 10.1007/s00167-020-06191-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 07/27/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE A histological study of a structure between the posterior horn of the lateral meniscus and the anterior cruciate ligament. METHODS Bilateral fresh-frozen cadaveric knees of two male donors (age 71 and 76 years) with no history of prior knee injury were examined. All dissections were performed by one experienced orthopaedic surgeon. Haematoxylin and Eosin staining was used to reveal tissue morphology. Goldner trichrome staining was used to evaluate the connective tissue. S100 and PGP 9.5 labelling were used for immunohistochemical analysis. RESULTS In all cadaveric knees, a structure between the posterior horn of the lateral meniscus and the anterior cruciate ligament was identified. Histological analysis confirmed the ligamentous nature of this structure. Furthermore, Golgi tendon organs were observed within the ligamentous structure. CONCLUSION This is the first study showing the presence of mechanoreceptors within the ligamentous structure between the posterior horn of the lateral meniscus and the anterior cruciate ligament. The ligamentous structure could contribute to stability of the knee by providing proprioceptive input, while preservation of the ligamentous structure might ensure a better functional outcome after surgery.
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Affiliation(s)
- Baris B Koc
- Department of Orthopaedic Surgery, Zuyderland Medical Center, Dr. H. vd Hoffplein 1, 6162 AG, Sittard Geleen, The Netherlands.
| | - Edwin J P Jansen
- Department of Orthopaedic Surgery, Zuyderland Medical Center, Dr. H. vd Hoffplein 1, 6162 AG, Sittard Geleen, The Netherlands
| | - Paul van Dijk
- Department of Anatomy and Embryology, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - Pieter J Emans
- Department of Orthopaedic Surgery, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Arno Lataster
- Department of Anatomy and Embryology, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
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Espregueira-Mendes J. Is the anterolateral ligament the smoking gun to explain rotational knee laxity or just vaporware? J ISAKOS 2021; 6:63-65. [PMID: 33832978 DOI: 10.1136/jisakos-2020-000529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- João Espregueira-Mendes
- Clínica do Dragão, Espregueira-Mendes Sports Centre - FIFA Medical Centre of Excellence, Porto, Portugal .,Dom Henrique Research Centre, Porto, Portugal.,School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.,3B's Research Group-Biomaterials, Biodegradablesand Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
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10
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Topography of sensory receptors within the human glenohumeral joint capsule. J Shoulder Elbow Surg 2021; 30:779-786. [PMID: 32707328 DOI: 10.1016/j.jse.2020.07.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 07/04/2020] [Accepted: 07/07/2020] [Indexed: 02/01/2023]
Abstract
BACKGROUND AND HYPOTHESES Sensory receptors in the joint capsule are critical for maintaining joint stability. However, the distribution of sensory receptors in the glenohumeral joint of the shoulder, including mechanoreceptors and free nerve endings, has not been described yet. This study aimed to describe the distributions of different sensory receptor subtypes in the glenohumeral joint capsule. Our hypotheses were as follows: (1) Sensory receptor subtypes would differ in density but follow a similar distribution pattern, and (2) the anterior capsule would have the highest density of sensory receptors. METHODS Six glenohumeral joint capsules were harvested from the glenoid to the humeral attachment. The capsule was divided into 4 regions of interest (anterior, posterior, superior, and inferior) and analyzed using modified gold chloride stain. Sensory receptors as well as free nerve endings were identified and counted under a light microscope from sections of each region of interest. The density of each sensory receptor subtype was calculated relative to capsule volume. RESULTS Sensory receptors were distributed in the glenohumeral joint capsule with free nerve endings. The anterior capsule exhibited the highest median density of all 4 sensory receptors examined, followed by the superior, inferior, and posterior capsules. The median densities of these sensory receptor subtypes also significantly differed (P = .007), with type I (Ruffini corpuscles) receptors having the highest density (2.97 U/cm3), followed by type IV (free nerve endings, 2.25 U/cm3), type II (Pacinian corpuscles, 1.40 U/cm3), and type III (Golgi corpuscles, 0.24 U/cm3) receptors. CONCLUSION Sensory receptor subtypes are differentially expressed in the glenohumeral joint capsule, primarily type I and IV sensory receptors. The expression of sensory receptors was dominant in the anterior capsule, stressing the important role of proprioception feedback for joint stability. The surgical procedure for shoulder instability should consider the topography of sensory receptors to preserve or restore the proprioception of the shoulder joint.
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Iseki T, Rothrauff BB, Kihara S, Novaretti JV, Shea KG, Tuan RS, Fu FH, Alexander PG, Musahl V. Paediatric knee anterolateral capsule does not contain a distinct ligament: analysis of histology, immunohistochemistry and gene expression. J ISAKOS 2020; 6:82-87. [PMID: 33832981 DOI: 10.1136/jisakos-2019-000339] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/05/2020] [Indexed: 12/22/2022]
Abstract
OBJECTIVES The presence of a discrete ligament within the knee anterolateral capsule (ALC) is controversial. Tendons and ligaments have typical collagens, ultrastructure, transcription factors and proteins. However, these characteristics have not been investigated in paediatric ALC. The purpose of this study was to characterise the paediatric ALC in terms of tissue ultrastructure and cellular expression of ligament markers scleraxis (SCX)-a basic helix-loop-helix transcription factor-and the downstream transmembrane glycoprotein tenomodulin (TNMD), as compared with the paediatric lateral collateral ligament (LCL) and paediatric quadriceps tendon (QT). We hypothesised that, in comparison to the LCL and QT, the ALC would possess poor collagen orientation and reduced SCX and TNMD expression. METHODS 15 paediatric ALCs (age 6.3±3.3 years), 5 paediatric LCLs (age 3.4±1.3 years) and 5 paediatric QTs (age 2.0±1.2 years) from fresh cadaveric knees were used in this study. Fresh-frozen samples from each region were cryosectioned and then stained with H&E to evaluate collagen alignment and cell morphology. Expression of SCX and TNMD was determined by gene expression analysis and immunohistochemistry. RESULTS The histological sections of the paediatric LCL and QT showed well-organised, dense collagenous tissue fibres with elongated fibroblasts, while the ALC showed more random collagen orientation without clear cellular directionality. The aspect ratio of cells in the ALC was significantly lower than that of the LCL and QT (p<0.0001 and p<0.0001, respectively). The normalised distribution curve of the inclination angles of the nuclei in the ALC was more broadly distributed than that of the LCL or QT, indicating random cell alignment in the ALC. SCX immunostaining was apparent in the paediatric LCL within regions of aligned fibres, while the comparatively disorganised structure of the ALC was negative for SCX. The paediatric LCL also stained positive for TNMD, while the ALC was only sparsely positive for this tendon/ligament cell-surface molecule. Relative gene expression of SCX and TNMD were higher in the LCL and QT than in the ALC. CONCLUSION In this study, a distinct ligament could not be discerned in the ALC based on histology, immunohistochemistry and gene expression analysis. LEVEL OF EVIDENCE Controlled laboratory study.
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Affiliation(s)
- Tomoya Iseki
- Department of Orthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan.,Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Benjamin B Rothrauff
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Shinsuke Kihara
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - João V Novaretti
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Ortopedia e Traumatologia, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
| | - Kevin G Shea
- Department of Orthopaedic Surgery, Stanford University, Stanford, California, USA
| | - Rocky S Tuan
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Freddie H Fu
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Peter G Alexander
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Volker Musahl
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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Lôbo CFT, Helito PVP, Bordalo-Rodrigues M, Helito CP. Computed tomography (CT), X-ray, and MRI evaluation of two anterolateral knee reconstruction techniques: lateral extra-articular tenodesis (LET) and the anterolateral ligament (ALL) reconstruction. Skeletal Radiol 2020; 49:1037-1049. [PMID: 32147757 DOI: 10.1007/s00256-020-03402-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 02/08/2020] [Accepted: 02/17/2020] [Indexed: 02/02/2023]
Abstract
The anterolateral ligament (ALL) and capsule of the knee are anatomical structures involved in rotational stability and pivot-shift control. As such, it has been demonstrated that the extra-articular anterolateral procedures improve clinical outcome when performed as an augmentation of the anterior cruciate ligament (ACL) reconstruction in specific groups of patients. This review describes the postoperative imaging findings of two techniques used to perform these procedures, using magnetic resonance imaging (MRI), computed tomography (CT), and radiography. The first technique described is the lateral extra-articular tenodesis (LET), which uses a strip of the iliotibial band that is harvested, passed underneath the lateral collateral ligament (LCL) and fixed posterior, and proximal to the lateral femoral epicondyle (LFE), preserving ITB insertion on Gerdy's tubercle. The second technique described is the ALL reconstruction, a procedure that attempts to recreate the anatomy of the ALL, using most often a gracilis autograft. In this procedure, femoral fixation is performed proximal and posterior to the LFE, and tibial fixation is slightly distal to the joint line, halfway from Gerdy's tubercle to the fibular head. The main objective of this review is to provide an overview of the postoperative imaging aspects of these two procedures with MRI, CT, and radiography and to describe possible complications. As they become more common, it is important for the radiologist and the orthopedic surgeon to understand their particularities in combination with the already well-known ACL reconstruction.
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Affiliation(s)
- Carlos Felipe Teixeira Lôbo
- Grupo de Radiologia Musculo-esquelética, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.
| | - Paulo Victor Partezani Helito
- Grupo de Radiologia Musculo-esquelética, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
- Hospital Sírio Libanês, São Paulo, Brazil
| | - Marcelo Bordalo-Rodrigues
- Grupo de Radiologia Musculo-esquelética, Instituto de Ortopedia e Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
- Hospital Sírio Libanês, São Paulo, Brazil
| | - Camilo Partezani Helito
- Hospital Sírio Libanês, São Paulo, Brazil
- Grupo de Joelho, Instituto de Ortopedia e Traumatologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
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13
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Distribution, quantity and gene expression of mechanoreceptors in ligaments and tendons of knee joint in rabbits. J Mol Histol 2020; 51:233-240. [PMID: 32356233 DOI: 10.1007/s10735-020-09875-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/25/2020] [Indexed: 01/12/2023]
Abstract
Here we investigated the morphology, quantity, distribution and gene expression of mechanoreceptors in the anterior cruciate ligament (ACL), posterior cruciate ligament (PCL), medial collateral ligament (MCL), lateral collateral ligament (LCL), patellar tendon (PaT) and popliteal tendon (PoT) of the knee joint. Twelve 6-month-old rabbits were divided into two groups. In one group, the ACL, PCL, MCL, LCL, PaT and PoT were collected to observe the morphology, distribution and quantity of mechanoreceptors. In another group, the ACL, PCL, MCL, LCL, PaT and PoT of bilateral knee joints were used to determine S100B, CGRP and NEFM gene levels. Five types of mechanoreceptors were observed including Ruffini corpuscles, Pacinian corpuscles, Golgi-tendon bodies, atypical mechanoreceptors and free nerve endings. The total amount of mechanoreceptors was significantly lower in MCL, LCL, PaT and PoT as compared with ACL and PCL (P < 0.001). All examined mechanoreceptors were present in ACL, PCL and LCL. However, no Pacinian corpuscles and Golgi-tendon bodies were found in MCL and PoT as well as Pacinian corpuscles were not observed in PaT. The present study indicated that the levels of NEFM was significantly lower in PCL, MCL, LCL, PaT and PoT as compared with ACL (P < 0.05), but there was no significant difference in CGRP level between ACL and other ligaments except LCL (P > 0.05). Thus, the quantity, type and gene expression of mechanoreceptors are different in various ligaments. Thus, the quantity and distribution of mechanoreceptors may be related to ligament's function.
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Çabuk H. Editorial Commentary: Knee Anterolateral Ligament Mechanoreceptors: The First Step From Peripheral to Central Nervous System. Arthroscopy 2019; 35:2928-2929. [PMID: 31604515 DOI: 10.1016/j.arthro.2019.06.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 06/26/2019] [Indexed: 02/02/2023]
Abstract
The mechanoreceptors around the knee are of interest, including those mechanoreceptors related to the anterolateral ligament. Histopathologic evaluations of mechanoreceptors are the first steps in understanding the exact sensorimotor system of the extremities. Many studies have shown these mechanoreceptors, but more electrophysiologic studies are needed to make sense of the reported phenomena.
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