AM bundle controls the anterior–posterior and rotational stability to a greater extent than the PL bundle — A cadaver study

The Knee ◽  
2013 ◽  
Vol 20 (6) ◽  
pp. 551-555 ◽  
Author(s):  
Martin Komzák ◽  
Radek Hart ◽  
František Okál ◽  
Adel Safi
Keyword(s):  
Cadaver Study ◽  
Rotational Stability ◽  
Pl Bundle ◽  
Anterior Posterior

Anterior Drawer Test for Acute Anterior Talofibular Ligament Injuries of the Ankle: How Much Load Should be Applied during the Test?

2003 ◽  
Vol 31 (2) ◽  
pp. 226-232 ◽  
Author(s):  
Harukazu Tohyama ◽  
Kazunori Yasuda ◽  
Yasumitu Ohkoshi ◽  
Bruce D. Beynnon ◽  
Per A. Renstrom
Keyword(s):  
Cadaver Study ◽  
Ankle Injuries ◽  
Ligament Injury ◽  
Normal Displacement ◽  
Anterior Talofibular Ligament ◽  
Anterior Drawer ◽  
Anterior Drawer Test ◽  
Ankle Ligament ◽  
Anterior Posterior

Background: There is a lack of consensus regarding the magnitude of load for performing the anterior drawer test in evaluating acute ankle injuries. Purpose: To determine how much load should be applied during the anterior drawer test to detect the integrity of the anterior talofibular ligament. Methods: First, the anterior-posterior load-displacement response of nine cadaveric ankles was measured. Second, anterior displacement of the ankle was measured at 30 and 60 N of anterior load in 14 patients with acute tears of the anterior talofibular ligament. Results: In the cadaver study, the increased displacement by sectioning of the ligament measured at 10, 20, 30, and 40 N of anterior load were significantly greater than those measured at 60 N. In vivo examination of the subjects without anesthesia demonstrated that the injured-to-normal displacement value at 30 N of anterior load was significantly greater than the value at 60 N. Conclusions: This study suggests that a large magnitude of anterior load is not necessary to detect the integrity of the ligament during the anterior drawer test. Clinical Relevance: When evaluating the integrity of the anterior talofibular ligament in cases of acute ankle ligament injury, a relatively low-magnitude load should be applied.

Biomechanical evaluation of the impact of various facet joint lesions on the primary stability of anterior plate fixation in cervical dislocation injuries: a cadaver study

2014 ◽  
Vol 21 (4) ◽  
pp. 634-639 ◽  
Author(s):  
Ludwig Oberkircher ◽  
Sebastian Born ◽  
Johannes Struewer ◽  
Christopher Bliemel ◽  
Benjamin Buecking ◽  
...  
Keyword(s):  
Facet Joint ◽  
Plate Fixation ◽  
Primary Stability ◽  
Cadaver Study ◽  
Facet Joints ◽  
Anterior Plate ◽  
The Third ◽  
Subaxial Cervical Spine ◽  
The Mean ◽  
Anterior Posterior

Object Injuries of the subaxial cervical spine including facet joints and posterior ligaments are common. Potential surgical treatments consist of anterior, posterior, or anterior-posterior fixation. Because each approach has its advantages and disadvantages, the best treatment is debated. This biomechanical cadaver study compared the effect of different facet joint injuries on primary stability following anterior plate fixation. Methods Fractures and plate fixation were performed on 15 fresh-frozen intact cervical spines (C3–T1). To simulate a translation-rotation injury in all groups, complete ligament rupture and facet dislocation were simulated by dissecting the entire posterior and anterior ligament complex between C-4 and C-5. In the first group, the facet joints were left intact. In the second group, one facet joint between C-4 and C-5 was removed and the other side was left intact. In the third group, both facet joints between C-4 and C-5 were removed. The authors next performed single-level anterior discectomy and interbody grafting using bone material from the respective thoracic vertebral bodies. An anterior cervical locking plate was used for fixation. Continuous loading was performed using a servohydraulic test bench at 2 N/sec. The mean load failure was measured when the implant failed. Results In the group in which both facet joints were intact, the mean load failure was 174.6 ± 46.93 N. The mean load failure in the second group where only one facet joint was removed was 127.8 ± 22.83 N. In the group in which both facet joints were removed, the mean load failure was 73.42 ± 32.51 N. There was a significant difference between the first group (both facet joints intact) and the third group (both facet joints removed) (p < 0.05, Kruskal-Wallis test). Conclusions In this cadaver study, primary stability of anterior plate fixation for dislocation injuries of the subaxial cervical spine was dependent on the presence of the facet joints. If the bone in one or both facet joints is damaged in the clinical setting, anterior plate fixation in combination with bone grafting might not provide sufficient stabilization; additional posterior stabilization may be needed.

scholarly journals Comparative analysis of arthroscopic techniques of anterior cruciate ligament reconstruction in adolescents

2020 ◽  
Vol 8 (3) ◽  
pp. 259-268
Author(s):  
Marsel R. Salikhov ◽  
Vladislav V. Avramenko
Keyword(s):  
Anterior Cruciate Ligament ◽  
Comparative Analysis ◽  
Cruciate Ligament ◽  
Rotational Stability ◽  
Femoral Canal ◽  
Group 3 ◽  
Group 2 ◽  
Anterior Cruciate ◽  
Anterior Posterior ◽  
Group 1

Background. According to the considerably contradictory information across the international literature, both the anatomical and transtibial reconstruction of the anterior cruciate ligament (ACL), under similar conditions, yield good functional results from treatment. Therefore, it is important to evaluate the comparative effectiveness and the prospects of certain methods of ACL reconstruction. The purpose of this study was to analyze the possibilities and advantages of anatomical technologies for the reconstruction intervention. Aim. To compare the outcomes of ACL reconstructions among adolescent children using different methods. Materials and methods. The outcomes of 94 arthroscopic reconstructions of the ACL in adolescents were analyzed. The patients were categorized into 3 groups: Group 1 included 32 patients (34%) who underwent isometric plastic surgery of the ACL, wherein the femoral canal was formed using the transtibial technique. Group 2 included 30 patients (32%) who underwent anatomical plastic surgery of the ACL, with the formation of the femoral canal through additional anteromedial arthroscopic access. Group 3 included 32 patients (34%) who underwent the all-inside anatomical reconstruction of the ACL. Results. A comparative analysis of the outcomes of reconstruction of the ACL among adolescents revealed that the anterior-posterior and rotational stability of the knee joint was better in group 3 patients than in groups 1 and 2 patients. In fact, the group 3 patients showed a significantly less positive pivot-shift (0 degree to 87.5%; I+ the extent of 12.5%) than the group 1 patients (0 degree 46.8%; I+ degree 25%; II+ degree and 21.9%; III+ degree and 6.3%), followed by the group 2 patients (0 degree to 86.6%; I+ degree 6.7%; II+ degree of 6.7%). Conclusion. Considering the safety aspects of intra-articular structures and for the better anatomical orientation of the femoral canal, the all-inside method of ACL reconstruction yielded better outcomes of postoperative anterior-posterior and rotational stability of the knee joint.

scholarly journals Medrobotics Flex System for Laryngeal Surgery: A Feasible Study in Two Cadavers

2016 ◽  
Vol 7 (4) ◽  
pp. 204-206
Author(s):  
Soham Roy ◽  
Syed HS Naqvi ◽  
Ron J Karni
Keyword(s):  
Head And Neck ◽  
Neck Surgery ◽  
Cadaver Study ◽  
Surgical Instruments ◽  
Airway Surgery ◽  
Laryngeal Surgery ◽  
Laryngeal Exposure ◽  
Feasible Study ◽  
Head Neck ◽  
Anterior Posterior

ABSTRACT Objective To report the feasibility of Medrobotics Flex® System for laryngeal surgery. Materials and methods Cadaver study in research laboratory. Results The Medrobotics Flex System was utilized with the Medrobotics Flex Retractor to evaluate robotic laryngeal surgery in a cadaver model. Two surgeons using two cadavers tested the robotic system to expose the larynx and facilitate robotic airway surgery using the Flex Instruments. In both cadavers, these procedures were performed transorally with excellent visualization: supraglottoplasty, arytenoidectomy, epiglottectomy, vocal cord lesion excision, posterior cordotomy, hemilaryngectomy, and endoscopic anterior/posterior cricoid split. Laryngeal cleft repair was limited by availability of suture to close the interarytenoid band. Laryngeal exposure was rated as “excellent” by both surgeons using the robotic platform. Conclusion Robotic surgery for the head and neck, while still in relative infancy, remains one of the newest platforms for the otolaryngologist. Currently available robotic platforms, while adapted to head and neck and airway surgery, were not designed for this purpose and pose challenges in size and accessibility to the larynx. The Flex System is specifically designed for head and neck and laryngeal surgery. This system provides outstanding visualization of hard to access areas in the larynx and hypopharynx. The flexible surgical instruments used with the Flex System allow for reasonable surgical exposure and technique. The Flex System may provide an improved robotic experience for transoral laryngeal and head and neck surgery. How to cite this article Roy S, Naqvi SHS, Karni RJ. Medrobotics Flex System for Laryngeal Surgery: A Feasible Study in Two Cadavers. Int J Head Neck Surg 2016;7(4):204-206.

scholarly journals Arthroscopic Repair of Separation of Anterior Intermeniscal Ligament

2014 ◽  
Vol 2 (11_suppl3) ◽  
pp. 2325967114S0020
Author(s):  
Ahmet Güney ◽  
Ali Saltuk Argün ◽  
Murat Kahraman ◽  
İbrahim Kafadar ◽  
Ökkeş Bilal
Keyword(s):  
Meniscal Tear ◽  
Joint Space ◽  
Cadaver Study ◽  
Pigmented Villonodular Synovitis ◽  
Anterior Horn ◽  
Medial Meniscal Tear ◽  
Low Degrees ◽  
Pigmented Villonodular ◽  
Climbing Stairs ◽  
Anterior Posterior

Objectives: Aim of this article is to present and discuss a patient with separation of anterior intermeniscal ligament which was repaired arthroscopically. Methods: Anterior intermeniscal ligament (AIML) (transverse geniculate ligament or anterior transvers ligament) is an intraarticular structure connecting anterior convex edge of lateral meniscle to anterior tip of medial meniscle; limits anterior movement of menisci during extension and prevents pressure application of condylar surfaces onto menisci; and also limits anterior-posterior separation of anterior horn of medial meniscus during low degrees of flexion. AIML was found in 69 to 94 percent in different studies. Results: A thirty-eight year-old female patient referred our clinic with complaints of pain in right knee for a year that responds to pain killers, increasing with climbing stairs and decreasing with rest. Synovium origined mass was seen on MRI with contrast applied after an intraarticular mass seen on MRI. She undervent surgery and the mass in the medial of joint space considered as pigmented villonodular sinovitis was resected arthroscopically. During arthroscopy, separation of anterior marge of AIML and elevation of anterior horns of both medial and lateral were noticed. Using no 1 PDS suture AIML was pulled downwards from anterior marge and fixed. After fixation AIML and anterior horns of menisci replaced on tibial plateu again. Conclusion: As injuries of AIML which has an important role at stabilization of menisci during knee motions are seen very rarely, freuquency of AIML was reported 9.75 percent in a cadaver study and 75 percent of them was accompanied by medial meniscal tear. We could not find any other clinical study reporting AIML injury in the literature. As we apply arthroscopical intervention in order to resect intraarticular mass considered as pigmented villonodular synovitis, anterior separation of AIML and elevation of anterior horn of both menisci were noticed coincidentally and then were repaired. As the arthroscopical evaluation due to injuries of intraarticular structures is performed, AIML should also be evaluated, if necessary, repair should be performed in order to obtain stabilization of anterior horns of menisci.

Diagnostic yield of conventional and digital cephalometric images: a human cadaver study

2001 ◽  
Vol 30 (2) ◽  
pp. 101-105 ◽  
Author(s):  
F Gijbels ◽  
C B Serhal ◽  
G Willems ◽  
H Bosmans ◽  
G Sanderink ◽  
...  
Keyword(s):  
Diagnostic Yield ◽  
Cadaver Study ◽  
Human Cadaver ◽  
Human Cadaver Study

Análise do nível de concordância interobservadores na avaliação postural estática em idosos residentes no município de São Paulo

2016 ◽  
Vol 14 (6) ◽  
Author(s):  
Camila Costa Ibiapina Reis
Keyword(s):  
Sao Paulo ◽  
São Paulo ◽  
Anterior Posterior

Introdução: Diversos instrumentos de avaliação postural são descritos na literatura, porém não existe um consenso de qual seria o melhor método utilizado na prática clínica. Sabe-se que exames posturais precisos podem ser realizados com equipamentos simples, de baixo custo e fácil aplicabilidade. Como exemplo desses instrumentos, destacam-se o fio de prumo e o simetrógrafo. Entretanto, estes se caracterizam por serem métodos qualitativos e subjetivos. Objetivo: Nosso estudo teve como objetivo analisar o nível de concordância interobservadores na avaliação postural em idosos residentes no município de São Paulo. Métodos: Durante a avaliação foi utilizado o simetrógrafo e o fio de prumo, além de fotografias nas vistas anterior, posterior, lateral direita e esquerda. Essa avaliação contou com a participação de dois observadores, simultaneamente e sem comunicação. Para análise da concordância interobservadores utilizou-se o teste de concordância de Kappa, com nível de significância p < 0,001. Resultados: Cento e sessenta (160) idosos foram avaliados, sendo 104 mulheres e 56 homens, com idade 72,1 ± 7,1 anos. Verificou-se um bom nível de concordância interobservadores na avaliação postural dos idosos, destacando-se boa concordância em 16 variáveis analisadas, com valor mínimo de 0,813 e valor máximo de 0,949 e apenas duas categorias apresentaram baixa concordância, sendo valor mínimo de 0,737 e máximo de 0,750. Conclusão: A avaliação postural, realizada através do simetrógrafo e do fio de prumo, obteve bom nível de concordância entre os observadores. Por serem instrumentos de fácil aplicabilidade, baixo custo e grande praticidade, recomenda-se seu uso nas avaliações posturais em idosos.Palavras-chave: avaliação, postura, idosos.

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