metatarsophalangeal joint
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2022 ◽  
Author(s):  
Josep Torrent ◽  
Raúl Figa ◽  
Iban Clares ◽  
Eduard Rabat

Abstract Background: Recurrences of hallux valgus can be difficult to manage, especially after a prior simple bunionectomy. This study aimed to present a treatment algorithm for the correction of recurrences after a simple bunionectomy.Methods: This was a single-center, descriptive, and retrospective comparative study. Thirty-four consecutive patients were classified according to the bone stock and the presence or absence of end-stage arthritis of the first metatarsophalangeal joint (MTPJ). According to our algorithm, we only performed an osteotomy as the salvage procedure in cases with sufficient bone stock and absence of or mild arthritis. In the other cases, we performed an MTPJ fusion. Exceptionally, we chose a Keller-Brandes arthroplasty for patients with advanced age and comorbidities. Results: We performed 17 scarf osteotomies (50%), 15 MTPJ arthrodeses (44.1%), and 2 Keller-Brandes arthroplasties (5.9%). Following the algorithm, we achieved an improvement of the AOFAS score of >30 points without severe complications in all groups.Conclusions: The proposed operative algorithm successfully addresses the recurrences considering the lack of bone stock and the presence of MTPJ arthritis.Level of EvidenceLevel 3: retrospective comparative study


Biology ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 127
Author(s):  
Qiaolin Zhang ◽  
Yan Zhang ◽  
Jialu Huang ◽  
Ee Chon Teo ◽  
Yaodong Gu

Background: The stress of foot bone can effectively evaluate the functional damage caused by foot deformity and the results of operation. In this study, the finite element method was used to investigate the degree of displacement of distal chevron osteotomy on metatarsal stress and metatarsophalangeal joint load; Methods: Four finite element models of displacement were established by using the CT images of a patient with moderate hallux valgus (hallux valgus angle and intermetatarsal angle were 26.74° and 14.09°, respectively), and the validity of the model was verified. Each finite element model consisted of bones and various cartilage structures, ligaments, and plantar fascia, as well as encapsulated soft tissue. Except for soft tissue, the material properties of other parts were isotropic linear elastic material, and the encapsulated soft tissue was set as nonlinear hyperelastic material. The mesh was tetrahedral mesh. Link elements were used in ligament and plantar fascia. A ground reaction force with a half-body weight was applied at the bottom of the floor to simulate the ground reaction when standing. The upper surfaces of the encapsulated soft tissue, distal tibia, and distal fibula were fixed. The stress distribution of metatarsals and the stress of cartilage of the first metatarsophalangeal joint were compared and analyzed; Results: Compared with the hallux valgus without osteotomy, the stress of the first metatarsals and second metatarsals of 2–4 mm decreased, and the stress of the interarticular cartilage of the first metatarsophalangeal joint with 4 mm was reduced. In the case of 6 mm, the stress value between the first metatarsal and the first metatarsophalangeal joint increased, and 4 mm was the most suitable distance; Conclusions: Compared with the hallux valgus without osteotomy, the stress of the first metatarsals and second metatarsals of 2–4 mm decreased, and the stress of the interarticular cartilage of the first metatarsophalangeal joint with 4 mm was reduced. In the case of 6 mm, the stress value between the first metatarsal and the first metatarsophalangeal joint increased, and 4 mm was the most suitable distance. For the degree of displacement of the distal chevron osteotomy, the postoperative stability and the stress distribution of metatarsal bone should be considered. Factors such as hallux valgus angle, intermetatarsal angle, patient’s age, body weight, and metatarsal width should be considered comprehensively. The factors affecting osteotomy need to be further explored. The degree of displacement of osteotomy can be evaluated by FE method before the operation, and the most suitable distance can be obtained.


2022 ◽  
Vol 8 (1) ◽  
pp. 44-49
Author(s):  
Hasan MAY ◽  
Melih ÜNAL ◽  
Yusuf Alper KATI ◽  
Gürkan GÜMÜŞSUYU ◽  
Özkan KÖSE

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0262100
Author(s):  
Toshiyuki Kurihara ◽  
Masafumi Terada ◽  
Shun Numasawa ◽  
Yuki Kusagawa ◽  
Sumiaki Maeo ◽  
...  

Toe muscular strength plays an important role in enhancing athletic performance because the forefoot is the only part of the body touching the ground. In general, muscular strength increases with age throughout adolescence, and sex-related difference in muscular strength becomes evident during childhood and adolescence. However, toe muscular strength is known to be levelled off after late adolescence in both sexes. For adolescent populations, therefore, the association of toe muscular strength with physical performance might differ with age and/or sex. This study aimed to investigate differences in relationships between toe muscular strength and vertical jump performance across sex and age in adolescent populations. The maximum isometric strength of the toe muscles and vertical jump height (VJ) were assessed in 479 junior high school students (JH) aged 12–14 years (243 boys and 236 girls) and 465 high school students (HS) aged 15–18 years (265 boys and 200 girls). Two types of measurements were performed to evaluate the toe muscular strength: toe gripping strength (TGS) with the metatarsophalangeal joint in the plantar flexed position and toe push strength (TPS) with the metatarsophalangeal joint in the dorsiflexed position. TGS and TPS were normalized to body weight. Two-way ANOVA showed that TGS had significant main effects of sex (boys > girls) and age (HS > JH) while TPS only had a significant main effect of sex (boys > girls). When the effects of sex and age were separately analyzed, VJ was significantly correlated with TGS in JH girls, HS girls, and JH boys (r = 0.253–0.269, p < 0.05), but not in HS boys (r = 0.062, p = 0.3351). These results suggest that toe muscular strength is relatively weakly associated with vertical jump performance in adolescent boys and girls, but the association would not be established in high school boys.


2021 ◽  
Author(s):  
Mohamed Ahmed ◽  
Magdy Gharib ◽  
Mahmoud Moustafa ◽  
Mohammed Qasheesh

Abstract Background: Hallux Valgus HV was first proposed as a common pathologic condition affecting the great toe. The mechanism behind it is yet unknown. It has an impact on one's quality of life and ability to perform since it alters the mechanics of the foot and causes pain. conservative treatment is crucial. Kinesiotape (KT) has been demonstrated to be challengeable, cost-effective, and effective tool for restoring muscle function and strength, improving range of motion, reducing discomfort, and increasing lymphatic drainage, as well as having a mechanical correction effect. Objective: The purpose of this study was to investigate the influence of 8 weeks KT for HV-on-HV angle (HVA) and subsequently on pain.Design: pretest posttest control group randomized controlled trial.Subjects: Thirty HV patients their mean age 29.07 ±6.3 years.Methods: Patients were assigned randomly to study(A) and control(B) groups, study group received KT for HV which is replaced every 5 days for 8 weeks, and home regular exercise program for HV, control group received placebo KT replaced every 5 days and the same exercise program for HV, HVA was measured using x-ray pre and post taping also pain intensity was measured using visual analogue scale (VAS) Results: HVA showed a significant reduction in study group (p = 0.001) for right and left feet while non-significant reduction occurred in control group (p = 0.11 for right foot, p = 0.09 for left foot, while pain showed significant improvement in both study and control groups in both feet (p = 0.001). Conclusion: The results of this study revealed that KT in mobile hallux valgus for 8 weeks is effective on improving the metatarsophalangeal joint angle, decreasing pain, and hence may has positive functional impact in patients with hallux valgus.Clinical trial registration: retrospectively registered 5th of DEC. (NCT05165134)


2021 ◽  
Vol 15 (3) ◽  
pp. 193-197
Author(s):  
Manuel Monteagudo de la Rosa ◽  
Ramón Viladot-Pericé

There is a continuous anatomical, functional and pathomechanical roadmap from functional hallux limitus to hallux rigidus. Although many etiologies for hallux rigidus have been studied it is very probable that it has a primary origin with less-than-ideal movement when we are born. Upon a restricted range of motion, symptoms may arise depending on the amount of work and how compensatory mechanisms work around the first metatarsophalangeal joint. Changes occurring at the joint that allow the transition from a sliding movement mechanism (physiological) to a rolling mechanism (pathological) may trigger anatomical and functional changes resulting in pain and dysfunction. Any surgical technique that is able to restore the sliding mechanism to the first metatarsophalangeal joint will have a positive impact on pain and function in a patient with a symptomatic functional hallux limitus/rigidus. Level of Evidence V; Therapeutic Study; Expert opinion.


2021 ◽  
Vol 15 (3) ◽  
pp. 205-207
Author(s):  
Mario Herrera-Perez ◽  
David González-Martín ◽  
Ramón Viladot-Pericé

This study performs a literature review on the treatment of hallux rigidus and proposes a treatment algorithm.This literature systematic review expanded a similar study conducted in 2014 by the authors and analyzed the levels of recommendation according to scientific evidence.Most articles found in the search present scarce evidence (level IV or case series), we only found 8 articles with an at least moderate level of recommendation (B); of these, only one article had a level of evidence I.Conservative treatment is effective with the implementation of footwear modifications, use of insoles, and infiltrations with hyaluronic acid. Cheilectomy, either isolated or combined with Moberg osteotomy, shows good outcomes in stage III, or moderate, although its outcomes worsen after 5 years. Metatarsophalangeal joint (MTPJ) arthrodesis is still the gold standard in stage IV, or advanced. In recent years, the technique of interposition arthroplasty has re-emerged, especially with the use of a synthetic cartilage implant (Cartiva®), with outcomes at least similar to those of MTPJ arthrodesis in comparative studies. Level of Evidence III; Therapeutic Studies; Systematic Review of Level III Studies.


PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0260572
Author(s):  
Wojciech Witkowski ◽  
Leszek Kuik ◽  
Magdalena Rucka ◽  
Karol Daszkiewicz ◽  
Angela Andrzejewska ◽  
...  

Objective The purpose of this study was to biomechanically compare the stability of first metatarsophalangeal (MTP1) joint arthrodesis with dorsally and medially positioned plates. Methods A physical model of the MTP1 joint consists of printed synthetic bones, a titanium locking plate and screws. In the experiments, samples with dorsally and medially positioned plates were subjected to loading of ground load character in a universal testing machine. Force-displacement relations and relative displacements of bones were recorded. The obtained results were used to validate the corresponding finite element models of the MTP1 joint. Nonlinear finite element simulations of the toe-off phase of gait were performed to determine the deformation and stress state in the MTP1 joint for two positions of the plate. Results In numerical simulations, the maximum displacement in the dorsal direction was noticed at the tip of the distal phalanx and was equal to 19.6 mm for the dorsal plate and 9.63 mm for the medial plate for a resultant force of 150 N. Lower relative bone displacements and smaller plastic deformation in the plate were observed in the model with the medial plate. Stress values were also smaller in the medially positioned plate and locking screws compared to fixation with the dorsal plate. Conclusions A medially positioned locking plate provides better stability of the MTP1 joint than a dorsally positioned plate due to greater vertical bending stiffness of the medial plate. Smaller relative bone displacements observed in fixation with the medial plate may be beneficial for the bone healing process. Moreover, lower stress values may decrease the risk of complications associated with hardware failure.


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