scholarly journals Effect of Displacement Degree of Distal Chevron Osteotomy on Metatarsal Stress: A Finite Element Method

Biology ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 127
Author(s):  
Qiaolin Zhang ◽  
Yan Zhang ◽  
Jialu Huang ◽  
Ee Chon Teo ◽  
Yaodong Gu
Keyword(s):  
Finite Element ◽  
Soft Tissue ◽  
Hallux Valgus ◽  
Metatarsophalangeal Joint ◽  
Plantar Fascia ◽  
First Metatarsophalangeal Joint ◽  
Intermetatarsal Angle ◽  
First Metatarsal ◽  
Chevron Osteotomy ◽  
Valgus Angle

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.

Modified Austin Procedure for Correction of Hallux Valgus

1997 ◽  
Vol 18 (3) ◽  
pp. 119-127 ◽  
Author(s):  
Hans-Jörg Trnka ◽  
Alexander Zembsch ◽  
Hermann Wiesauer ◽  
Marc Hungerford ◽  
Martin Salzer ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Hallux Valgus ◽  
Metatarsophalangeal Joint ◽  
Metatarsal Head ◽  
Hallux Valgus Angle ◽  
First Metatarsophalangeal Joint ◽  
Intermetatarsal Angle ◽  
Soft Tissue Procedure ◽  
Valgus Angle

The Austin osteotomy is a widely accepted method for correction of mild and moderate hallux valgus. In view of publications by Kitaoka et al. in 1991 and by Mann and colleagues, a more radical lateral soft tissue procedure was added to the originally described procedure. From September 1992 to January 1994, 85 patients underwent an Austin osteotomy combined with a lateral soft tissue procedure to correct their hallux valgus deformities. Seventy-nine patients (94 feet) were available for follow-up. The average patient age at the time of the operation was 47.1 years, and the average follow-up was 16.2 months. The average preoperative intermetatarsal angle was 13.9°, and the average hallux valgus angle was 29.7°. After surgery, the feet were corrected to an average intermetatarsal angle of 5.8° and an average hallux valgus angle of 11.9°. Sesamoid position was corrected from 2.1 before surgery to 0.5 after surgery. The results were also graded according to the Hallux Metatarsophalangeal Interphalangeal Score, and the functional and cosmetic outcomes were graded by the patient. Dissection of the plantar transverse ligament and release of the lateral capsule repositioned the tibial sesamoid and restored the biomechanics around the first metatarsophalangeal joint. There was no increased incidence of avascular necrosis of the first metatarsal head compared with the original technique.

Intermetatarsal Angular Change Following Fusion of the First Metatarsophalangeal Joint

2009 ◽  
Vol 30 (5) ◽  
pp. 415-418 ◽  
Author(s):  
K.V. Satya Pydah ◽  
Eugene M. Toh ◽  
Siva P. Sirikonda ◽  
Christopher R. Walker
Keyword(s):  
Hallux Valgus ◽  
Corrective Osteotomy ◽  
Metatarsophalangeal Joint ◽  
Hallux Valgus Angle ◽  
First Metatarsophalangeal Joint ◽  
Intermetatarsal Angle ◽  
First Metatarsal ◽  
Valgus Angle ◽  
Low Profile ◽  
American Orthopaedic

Background: Arthrodesis of the first metatarsophalangeal (MTP) joint with a low profile fixed angle plate allows for a consistent resultant hallux valgus angle. There is no clear consensus on whether a separate corrective osteotomy of the first metatarsal should be performed in addition to the first metatarsophalangeal joint fusion in patients with an increased intermetatarsal angle. We quantified the amount of correction of the intermetatarsal angle as well as the position of the tibial sesamoid in this group of patients following fusion of the first MTP joint. Materials and Methods: A consecutive cohort of 69 feet (13 bilateral) who underwent a standard primary fusion of the first metatarsophalangeal joint using a dorsal approach between May 2006 and January 2008 were reviewed. Radiological measurements were taken from 6-week postoperative weightbearing radiographs and included the hallux valgus angle, intermetatarsal angle as well as the position of the tibial sesamoid in accordance to the American Orthopaedic Foot and Ankle Society guidelines. Results: Postoperatively, there was an improvement in the hallux valgus angle from 33.0 degrees to 10.4 degrees ( p < 0.001). The mean intermetatarsal angle also improved from 13.1 degrees preoperatively to 8.6 postoperatively ( p < 0.001). The position of the tibial sesamoid generally improved by at least one grade (Spearman's r = 0.74). There was a strong correlation ( r = 0.77, p < 0.001) between the preoperative intermetatarsal angle and the postoperative intermetatarsal angle. Conclusion: Both the intermetatarsal angle and position of the tibial sesamoid reliably improved following arthrodesis of the first MTP joint, negating the need for a separate osteotomy of the first metatarsal.

Correlation analysis of the x-ray and functional parameters from the results of chevron (Austin) osteotomy for hallux valgus

2020 ◽  
pp. 54-63
Author(s):  
Ruslan Khairutdinov ◽  
Timur Minasov ◽  
Ekaterina Yakupova ◽  
Elvina Mukhametzyanova
Keyword(s):  
Hallux Valgus ◽  
Rating Scale ◽  
Metatarsophalangeal Joint ◽  
Valgus Deformity ◽  
First Metatarsophalangeal Joint ◽  
Chevron Osteotomy ◽  
Hallux Valgus Deformity ◽  
Valgus Angle ◽  
The Right ◽  
Bone Structures

Hallux valgus is characterized by the appearance and growth of a painful “lump” in the region of the first metatarsophalangeal joint, the development of forefoot corns, and inability to choose the right shoes, which leads to a significant decrease in the quality of life of these patients. Corrective osteotomies that preserve the metatarsophalangeal joint, for example Austin (Chevron) osteotomy, are usually used for hallux valgus deformity of the I, II degrees. Radiography with the study of the hallux valgus angle (HVA), the intermetatarsal angle (IMA), the distal metatarsal articular angle (DMAA) is a research method that shows the true correlation between bone structures. The correlation between the radiological and functional indicators of osteotomy allows us to determine possible recommendations for indications for surgical treatment of Hallux valgus. Correlation shows that the largest correction of hallux valgus in older patients occurs due to a small adjustment of the angle of DMMA and HVA. IMA had the best correction after Austin osteotomy among patients of a younger age, then the HVA, and the DMMA had minimum correction according to the AOFAS rating scale (Kitaoka). The revealed correlations allow us to determine the correct tactics for the treatment of hallux valgus by identifying the benefits of Austin osteotomy.

scholarly journals Rotational Distal Chevron Osteotomy for Correction of Hallux Valgus Associated with Metatarsus Adductus and Large Distal Metatarsal Articular Angle

2019 ◽  
Vol 4 (4) ◽  
pp. 2473011419S0023
Author(s):  
Jae-Jung Jeong
Keyword(s):  
Hallux Valgus ◽  
Metatarsal Head ◽  
Metatarsal Osteotomy ◽  
Hallux Valgus Angle ◽  
Intermetatarsal Angle ◽  
First Metatarsal ◽  
Chevron Osteotomy ◽  
Valgus Angle ◽  
Before And After ◽  
Metatarsus Adductus

Category: Bunion Introduction/Purpose: Hallux valgus treatment in the setting of associated metatarsus adductus is less common and not well described. The presence of metatarsus adductus reduces the gap between the first and second metatarsals. Consequently, it complicates the measurement of the first-second intermetatarsal angle and can limit the area available for transposition of the first metatarsal head. If distal metatarsal articular angle (DMAA) is also increased here, it is difficult to correct. We investigated the effects of rotational distal chevron metatarsal osteotomy (DCMO) on hallux valgus associated with metatarsus adductus and increased DMAA. Methods: Twelve patients, (12 female, 15 feet), of average age 59 (SD 23) with symptomatic hallux valgus associated with metatarsus adductus and increased DMAA underwent a rotation DCMO and were reviewed at an average of 12 months postoperatively. Clinically preoperative and postoperative AOFAS hallux MP-IP scale and satisfaction after the surgery were analyzed. Radiologically hallux valgus angle, the 1st intermetatarsal angle, DMAA before and after the operation was analyzed. Results: Distal Chevron osteotomy was done in 15 cases. After DCMO, The distal fragment was translated to laterally as far as possible and rotated to reduce DMAA. Clinically AOFAS scale was increased from 65.3 points preoperatively to 92.2 points postoperatively. Two patients were not satisfied with the results. Radiologically hallux valgus angle was decreased from 21.8° preoperatively to 8.5° postoperatively. The first intermetatarsal angle was decreased from 11.8° preoperatively to 6.7° postoperatively. DMAA was decreased from 15.8° preoperatively to 5.5° postoperatively. Conclusion: The rotational DCMO was an effective procedure for correcting hallux valgus associated with metatarsus adductus and increased DMAA. It allowed good realignment of the first MTP joint without the need for lesser metatarsal surgery to reduce the metatarsus adductus.

Medial Deviation of the First Metatarsal Head as a Result of Flexion Forces in Hallux Valgus

Foot & Ankle ◽  
1992 ◽  
Vol 13 (9) ◽  
pp. 515-522 ◽  
Author(s):  
Antal Petrus Sanders ◽  
Christiaan Johannes Snijders ◽  
Bert van Linge
Keyword(s):  
Hallux Valgus ◽  
Statistical Significance ◽  
Metatarsophalangeal Joint ◽  
Metatarsal Head ◽  
First Metatarsophalangeal Joint ◽  
First Metatarsal ◽  
Valgus Angle ◽  
Flexor Muscles ◽  
Muscle Balance ◽  
Flexion Force

Several questions with regard to the hallux valgus complex, which includes metatarsus primus varus, give rise to discussion. How do bunions develop? Is disturbed muscle balance at the first metatarsophalangeal joint important in the pathogenesis of the hallux valgus complex? What is the relation between dynamic plantar load distribution and pain in the ball of the foot? What is the cause of recurrences of deformity after surgery? To answer these questions, we started with the bio-mechanical model of Snijders et al., 31 which states that contraction of flexor muscles of the hallux worsens its valgus angle and causes medial deviation of the first metatarsal head. The present study was designed to validate the model on patients. When pressing the hallux downward, simultaneously the force under the toe and the medial deviation of the first metatarsal head were measured on preoperative patients and on controls (35 subjects in all). We could demonstrate with statistical significance that (1) when the subjects with hallux valgus push the great toe on the ground, the first metatarsal head moved in medial direction; in other words the foot widened. In the controls, as an average, the foot became narrower. (2) The greater the valgus deviation of the hallux, the greater the effect of the toe flexors, and (3) the greater the valgus deviation of the hallux, the less maximal flexion force it can apply. Implications of these findings on conservative and surgical therapy are discussed. The recurrences of deformity after first metatarsal osteotomies are explained by the action of the hallux flexors. The stable result of arthrodesis of the first metatarsophalangeal joint is expected to be accompanied by narrowing of the foot as a result of contraction of the flexor muscles.

Salvage Treatment of Failed Hallux Valgus Operations with Proximal First Metatarsal Osteotomy and Distal Soft-Tissue Reconstruction

1998 ◽  
Vol 19 (3) ◽  
pp. 127-131 ◽  
Author(s):  
Harold B. Kitaoka ◽  
Gary L. Patzer
Keyword(s):  
Soft Tissue ◽  
Hallux Valgus ◽  
Metatarsophalangeal Joint ◽  
Salvage Treatment ◽  
Activity Limitations ◽  
Metatarsal Osteotomy ◽  
Soft Tissue Reconstruction ◽  
First Metatarsophalangeal Joint ◽  
First Metatarsal ◽  
Tissue Reconstruction

We reviewed the results of 15 patients (16 feet) in whom a hallux valgus procedure had failed. Salvage was by proximal crescentic first metatarsal osteotomy with distal soft-tissue reconstruction. Results based on a clinical scale considering the level of pain, activity limitations, support requirement, footwear limitations, and alignment were good in 11, fair in two, and poor in three. Patients were satisfied with the results in 10 feet, satisfied with reservations in four feet, and dissatisfied in two feet. Complications were: transfer metatarsalgia in three, hallux varus in one, and osteotomy nonunion in one. One of the patients required reoperation to bone graft a proximal osteotomy. Metatarsal osteotomy was helpful in the salvage treatment of recurrent, symptomatic hallux valgus when the first metatarsophalangeal joint was functional and painless.

scholarly journals Review of current hallux valgus management options

2019 ◽  
Vol 2 (2) ◽  
pp. 130-138
Author(s):  
Mihai Nica ◽  
Bogdan Creţu ◽  
Răzvan Ene ◽  
Bogdan Şerban ◽  
Cătălin Cîrstoiu
Keyword(s):  
Hallux Valgus ◽  
Treatment Algorithm ◽  
Metatarsophalangeal Joint ◽  
Management Options ◽  
First Metatarsophalangeal Joint ◽  
First Metatarsal ◽  
Valgus Angle ◽  
First Ray ◽  
Surgical Options ◽  
Invasive Techniques

AbstractHallux valgus is one of the most common forefoot pathologies, with a multifactorial etiology that causes important functional impairment and metatarsalgia. The characteristic deformity originates from a biomechanical imbalance induced by the disruption of first metatarsophalangeal joint alignment and manifests as an abnormal weight transfer on the first ray during walking. Conservative treatment is unable to correct the deformity or stop the evolution of the disease but can distinctly control the symptoms. With time, a myriad of surgical correction techniques have been developed but no definitive surgical treatment algorithm has been generally accepted. Nonetheless, the decision process for choosing the suitable technique must be completed on an individual basis after considering the deformity severity stratification, status of the metatarsophalangeal and tarsometatarsal joints, bone anatomy, and associated comorbidities. In spite of a large variety of surgical options, there are a few main strategies that incorporate these variations: metatarsophalangeal and/or tarsometatarsal joint fusion, metatarsal osteotomies and soft tissue procedures. Nowadays, the surgical management of hallux valgus is dominated by first metatarsal osteotomies performed through open surgery or minimally invasive techniques. Hallux valgus angle has been found to be the single most important parameter for surgical outcome prognostic.

Proximal Metatarsal Osteotomy in Hallux Valgus Correction: A Comparison of Crescentic and Chevron Procedures

1997 ◽  
Vol 18 (2) ◽  
pp. 71-76 ◽  
Author(s):  
Lance A. Markbreiter ◽  
Francesca M. Thompson
Keyword(s):  
Hallux Valgus ◽  
Metal Removal ◽  
Metatarsophalangeal Joint ◽  
Senior Author ◽  
Metatarsal Osteotomy ◽  
Activity Levels ◽  
Intermetatarsal Angle ◽  
Chevron Osteotomy ◽  
Valgus Angle

We retrospectively evaluated the results of 50 hallux valgus reconstructions in 36 patients for moderate to severe deformities, performed by the senior author (F. M. T.). All feet were treated at the metatarsophalangeal joint with a distal soft tissue realignment. The first 25 feet were corrected proximally with a crescentic osteotomy fixed with an AO screw; these cases had an average follow-up of more than 5 years (range, 40–141 months). The second 25 feet underwent a basal osteotomy with a proximally directed chevron osteotomy; these cases had an average follow-up of 21.4 months (range, 12–33 months). The average hallux valgus correction in the crescentic osteotomy group went from 37.6° to 11.4°, and in the chevron osteotomy group, the hallux valgus angle was reduced from 31.3° to 11.6°. The intermetatarsal angle in the crescentic group was corrected from 16.2° to 6°, and in the chevron group the intermetatarsal angle was reduced from 15.1° to 5.4°. The fibular sesamoid subluxation was reduced from 92% to 24% in the crescentic group and from 88% to 18% in the chevron group. All patients were assessed using the American Orthopaedic Foot and Ankle Society scale, in which 100 points are used to compare pre- and postoperative pain, function and range of motion, shoewear comfort and activity levels, and alignment. In the crescentic group, the score improved from 46.8 points to 93.1 points; in the chevron group, the score changed from 53.4 points to 92.7 points. In all parameters studied, there were no statistically significant differences using the Student's t-test. We conclude that the two operative techniques offer equivalent results, which are excellent and predictable. The proximal chevron osteotomy is technically easier, eliminates the proximal dorsal scar, and does not require postoperative metal removal.

Hallux Valgus: Demographics, Etiology, and Radiographic Assessment

2007 ◽  
Vol 28 (7) ◽  
pp. 759-777 ◽  
Author(s):  
Michael J. Coughlin ◽  
Caroll P. Jones
Keyword(s):  
Hallux Valgus ◽  
Metatarsophalangeal Joint ◽  
Valgus Deformity ◽  
First Metatarsophalangeal Joint ◽  
First Metatarsal ◽  
Hallux Valgus Deformity ◽  
Valgus Angle ◽  
First Ray ◽  
The Mean ◽  
Severe Hallux Valgus

Background The purpose of the study was to preoperatively evaluate the demographics, etiology, and radiographic findings associated with moderate and severe hallux valgus deformities in adult patients (over 20 years of age) treated operatively over a 33-month period in a single surgeon's practice. Methods Patients treated for a hallux valgus deformity between September, 1999, and May, 2002, were identified. Patients who had mild deformities (hallux valgus angle < 20 degrees), concurrent degenerative arthritis of the first metatarsophalangeal joint, inflammatory arthritis, recurrent deformities, or congruent deformities were excluded. When enrolled, all patients filled out a standardized questionnaire and had a routine examination that included standard radiographs, range of motion testing, and first ray mobility measurement. A chart review and evaluation of preoperative radiographs were completed on all eligible patients. Results One-hundred and three of 108 (96%) patients (122 feet) with a diagnosis of moderate or severe hallux valgus (hallux valgus angle of 20 degrees or more) 70 qualified for the study. The onset of the hallux valgus deformity peaked during the third decade although the distribution of occurrence was almost equal from the second through fifth decades. Twenty-eight of 122 feet (23%) developed a deformity at an age of 20 years or younger. Eighty-six (83%) of patients had a positive family history for hallux valgus deformities and 87 (84%) patients had bilateral bunions. 15% of patients in the present series had moderate or severe pes planus based on a positive Harris mat study. Only 11% (14 feet) had evidence of an Achilles or gastrocnemius tendon contracture. Radiographic analysis found that 86 of 122 feet (71%) had an oval or curved metatarsophalangeal joint. Thirty-nine feet (32%) had moderate or severe metatarsus adductus. A long first metatarsal was common in patients with hallux valgus (110 of 122 feet; 71%); the mean increased length of the first metatarsal when compared to the second was 2.4 mm. While uncommon, the incidence of an os intermetatarsum was 7% and a proximal first metatarsal facet was 7%. The mean preoperative first ray mobility as measured with Klaue's device was 7.2 mm. 16 of 22 (13%) feet were observed to have increased first ray mobility before surgery. Conclusions The magnitude of the hallux valgus deformity was not associated with Achilles or gastrocnemius tendon tightness, increased first ray mobility, bilaterality or pes planus. Neither the magnitude of the preoperative angular deformity nor increasing age had any association with the magnitude of the first metatarsophalangeal joint range of motion. Constricting shoes and occupation were implicated by 35 (34%) patients as a cause of the bunions. A familial history of bunions, bilateral involvement, female gender, a long first metatarsal, and an oval or curved metatarsophalangeal joint articular surface were common findings. Increased first ray mobility and plantar gapping of the first metatarsocuneiform joint were more common in patients with hallux valgus than in the general population (when compared with historical controls).

scholarly journals First-Tarsometatarsal Joint Alignment After First-Metatarsophalangeal Joint Arthrodesis for Hallux Valgus

2021 ◽  
Vol 6 (2) ◽  
pp. 247301142110085
Author(s):  
Christopher Traynor ◽  
James Jastifer
Keyword(s):  
Hallux Valgus ◽  
Case Series ◽  
Metatarsophalangeal Joint ◽  
Retrospective Case ◽  
Level Of Evidence ◽  
First Metatarsophalangeal Joint ◽  
First Metatarsal ◽  
Metatarsal Angle ◽  
Medial Cuneiform ◽  
Radiographic Alignment

Background: Instability of the first-tarsometatarsal (TMT) joint has been proposed as a cause of hallux valgus. Although there is literature demonstrating how first-TMT arthrodesis affects hallux valgus, there is little published on how correction of hallux valgus affects the first-TMT joint alignment. The purpose of this study was to determine if correction of hallux valgus impacts the first-TMT alignment and congruency. Improvement in alignment would provide evidence that hallux valgus contributes to first-TMT instability. Our hypothesis was that correcting hallux valgus angle (HVA) would have no effect on the first-TMT alignment and congruency. Methods: Radiographs of patients who underwent first-MTP joint arthrodesis for hallux valgus were retrospectively reviewed. The HVA, 1-2 intermetatarsal angle (IMA), first metatarsal–medial cuneiform angle (1MCA), medial cuneiform–first metatarsal angle (MC1A), relative cuneiform slope (RCS), and distal medial cuneiform angle (DMCA) were measured and recorded for all patients preoperatively and postoperatively. Results: Of the 76 feet that met inclusion criteria, radiographic improvements were noted in HVA (23.6 degrees, P < .0001), 1-2 IMA (6.2 degrees, P < .0001), 1MCA (6.4 degrees, P < .0001), MC1A (6.5 degrees, P < .0001), and RCS (3.3 degrees, P = .001) comparing preoperative and postoperative radiographs. There was no difference noted with DMCA measurements (0.5 degrees, P = .53). Conclusion: Our findings indicate that the radiographic alignment and subluxation of the first-TMT joint will reduce with isolated treatment of the first-MTP joint. Evidence suggests that change in the HVA can affect radiographic alignment and subluxation of the first-TMT joint. Level of Evidence: Level IV, retrospective case series.

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