[Clinical comparative study on resection and non-resection of the fifth metatarsal to rheumatoid forefoot deformity].

OBJECTIVE: To explore clinical effect of the fifth metatarsal head excision and non-excision in rheumatoid arthritis (RA) forefoot deformity reconstruction. METHODS: Retrospective analysis was performed on 50 patients (76 feet) with moderate to severe forefoot deformity caused by RA treated from May 2015 to January 2019. According to degeneration of the fifth metatarsophalangeal joint,the fifth metatarsal head was retained or excised by wind-like forefoot reconstruction,and divided into the fifth metatarsal head preservation group (preservation group) and the fifth metatarsal head resection group (resection group). Twenty-four female patients in preservation group,aged from 47 to 81 years old with an average of (60.37±8.60) years old;the course of disease ranged from 13 to 22 years with an average of (19.00±3.06) years;body mass index (BMI) ranged from 21 to 28 kg·m-2 with an average of (23.53±2.47) kg·m-2;six patients (6 feet) with moderate hallux valgus deformity and 18 patients (30 feet) with severe hallux valgus deformity;treated with the first metatarsophalangeal joint fusion combined with the second th the fourth metatarsophalangeal joint arthroplasty and the fifth metatarsophalangeal joint cleanup. Twenty-six female patients in resection group were female,aged from 30 to 80 years old with an average of (58.53±13.70) years old;the course of disease ranged from 8 to 25 years with an average of (17.94±3.92) years;BMI raged from 20 to 28 kg·m-2 with an average of (24.60±2.03) kg·m-2;4 patients (4 feet) with moderate bunion valgus deformity and 22 patients (36 feet) with severe bunion valgus deformity;treated by the first metatarsophalangeal joint fusion combined with the second th the fifth metatarsophalangeal joint resection of the metatarsophalangeal head. Operation time and postoperative complications between two groups were observed,hallux valgus angle (HVA),intermetatarsal angles between the first and the second metatarsals (IMAFS),intermetatarsal angles between the first and fifth metatarsals (IMAFF),Japanese Society for Surgery of Foot (JSSF) score before surgery and at the latest follow-up were compared. RESULTS: Fifty patients were followed-up from 14 to 46(25.30±8.83) months in resection group and 12 to 48 with an average of (24.30±11.12) months in preservation group,while no significant difference between two groups (P>0.05). There were no significant difference in operation time and postoperative complications between two groups (P>0.05). JSSF scores,HVA,IMAFS and IMAFF in fesection group were improved from (45.09±3.35) points,(38.90±13.67) °,(12.88±1.72) °,(32.50±2.99) ° before operation to (81.60±3.27) points,(15.40±0.90),(9.06±2.27) °,(22.20±1.98) ° at the latest follow-up (P<0.05);preservation group were improved from (47.09±3.96) points,(43.30±12.65) °,(13.99±3.13) °,(33.20±6.14) ° to (83.10±3.66) points,(15.20±1.54) °,(8.99±1.02) °,(24.70±1.88) °,respectively. There were no significant difference in JSSF score,HVA,IMAFS and IMAFF between two groups before operation and the latest follow-up (P>0.05). At the latest follow-up,there were statistically significant differences in pain and deformity in JSSF scores between two groups (P<0.05). CONCLUSION: Both rheumatoid anterior foot reconstruction and anterior foot reconstruction fifth metatarsophalangeal joint debridement showed significant improvement in clinical efficacy and imaging results. Compared with rheumatoid prefoot reconstruction,the fifth metatarsophalangeal joint reconstruction for the treatment of moderate and severe deformity of rheumatoid prefoot showed better improvement in pain,but worse improvement in deformity. For the moderate to severe deformity of the forefoot caused by rheumatoid disease,patients with mild to moderate degenerative deformity of the articular surface of the fifth metatarsal phalanges may be considered for use.

Effect of lag screw on stability of first metatarsophalangeal joint arthrodesis with medial plate.

Background: First metatarsophalangeal joint (MTP-1) arthrodesis is a commonly performed procedure in the treatment of disorders of the great toe. Since the incidence of revision after MTP-1 joint arthrodesis is not insignificant, a medial approach with a medially positioned locking plate has been proposed as a new technique. The aim of the study was to investigate the effect of the application of a lag screw on the stability and strength of first metatarsophalangeal joint arthrodesis with medial plate. Methods: The bending tests in a testing machine were performed for models of the first metatarsal bone and the proximal phalanx printed on a 3D printer from polylactide material. The bones were joined using the locking titanium plate and six locking screws. The specimens were divided into three groups of seven each: medial plate and no lag screw, medial plate with a lag screw, dorsal plate with a lag screw. The tests were carried out quasi-static until the samples failure. Results: The addition of the lag screw to the medial plate significantly increased flexural stiffness (41.45 N/mm vs 23.84 N/mm, p = 0.002), which was lower than that of the dorsal plate with a lag screw (81.29 N/mm, p < 0.001). The similar maximum force greater than 700 N (p > 0.50) and the relative bone displacements lower than 0.5 mm for a force of 50 N were obtained for all fixation techniques. Conclusions: The lag screw significantly increased the shear stiffness in particular and reduced relative transverse displacements to the level that should not delay the healing process for the full load of the MTP-1 joint arthrodesis with the medial plate. It is recommended to use the locking screws with a larger cross-sectional area of the head to minimize rotation of the medial plate relative to the metatarsal bone.

A prospective clinical and biomechanical analysis of feet following first metatarsophalangeal joint arthrodesis for end stage hallux rigidus.

BACKGROUND: Hallux Rigidus is the result of degeneration of the 1st metatarsophalangeal joint (1st MTPJ). In end-stage hallux rigidus, treatment is mainly surgical with arthrodesis being a favourable option. Although the biomechanical effects of arthrodesis have been examined, a detailed comparison of pre- and post-operative biomechanics has yet to be conducted. RESEARCH QUESTION: Does 1st MTPJ arthrodesis positively affect foot kinematics and plantar pressure distribution? METHODS: Twelve 1st MTPJ arthrodesis were performed in patients with a mean age of 53.5 ± 5.4 years and follow up time of 6.9 ± 1.0 months. Pre- and post-operative data were collected at a CMAS (Clinical Movement Analysis Society) accredited gait laboratory using a BTS motion capture system and pedobarographic pressure plates. Patient outcome measures were also assessed using the MOXFQ. Statistical analysis was conducted using a two-way repeated measures ANOVA. RESULTS: Significant changes in stride length, cycle duration, cadence and velocity were identified following 1st MTPJ arthrodesis. A significant reduction in forefoot-hallux dorsiflexion at toe-off was identified for the operated foot from the pre-operative (20.23 ± 5.98°) to post-operative (7.56 ± 2.96°) assessment. Post-operative sagittal and transverse plane changes in the operated foot were also identified. Peak pressure and PTI results indicated significant lateralisation of load for the operated foot, but importantly this was not influenced following arthrodesis. Finally, there was a significant improvement in MOXFQ score. SIGNIFICANCE: Following 1st MTPJ fusion there is an improvement in overall gait mechanics which accompanied by the improved MOXFQ score indicates a reduction in pain and improved confidence during gait. The lack of post-operative dorsiflexion at forefoot-hallux caused load to remain lateralised and compensatory mechanisms to occur at the more proximal joints within the foot. These results provide valuable information for clinicians and will enable more accurate counselling to be provided to patients with end-stage hallux rigidus.

Midfoot width changes after first metatarsal osteotomy in hallux valgus surgery: A biomechanical effect?

Hallux valgus is a challenging pathology characterized by a valgus deformity in the metatarsophalangeal area of the first ray. The aim of this study was to analyze the influence of first metatarsal osteotomy on the relationship between midfoot bones in patients with hallux valgus. The sample consisted of patients from the orthopedics and traumatology outpatient clinic who underwent surgical treatment for hallux valgus. Preoperative and postoperative X-rays were compared regarding the width of the midfoot and the tarsometatarsal joint. The sample consisted of 17 women, with 22 feet assessed in each group. The distance from the medial cuneiform to the cuboid, the distance from the intermediate cuneiform to the cuboid, the distance between the first and fifth metatarsals, and the distance between the second and fifth metatarsals reduced significantly between pre- and postoperative assessments. Hallux valgus correction through osteotomy of the first metatarsal leads to a structural change in the midfoot. Further studies should determine whether these changes persist over time.

Outcomes of Joint-Preserving Surgery for Forefoot Deformities in Patients With Rheumatoid Arthritis.

BACKGROUND: With the advent of effective disease-modifying medications, the surgical treatment of forefoot deformities in patients with rheumatoid arthritis (RA) has evolved from joint-sacrificing to joint-preserving surgery. However, it is unclear whether joint-preserving surgery is effective for the full range of metatarsophalangeal joint involvement. Hence, this study investigated the postoperative outcomes of joint-preserving surgery for rheumatoid forefoot deformities with a wide range of joint destruction. METHODS: This retrospective observational study included 68 feet from 68 patients with RA who underwent joint-preserving surgery for forefoot deformities between 2014 and 2020. The Larsen grade classification was used to assess the first metatarsophalangeal joint destruction and classify patients into 4 groups as follows: 0 and 1 (n = 14), 2 (n = 21), 3 (n = 19), and 4 and 5 (n = 14). The Self-Administered Foot and Ankle Evaluation Questionnaire (SAFE-Q) score, hallux valgus angle (HVA), and intermetatarsal angle (IMA) were determined before surgery and at the last follow-up visit. RESULTS: The median observation duration was 40 (range, 24-78) months. SAFE-Q scores of all groups significantly improved in all subscales at the last observation, with no significant differences among the study groups. Radiographic evaluations of all groups revealed significant improvements in HVA and IMA after surgery, with no significant differences among the groups. CONCLUSION: In patients using the surgical approaches described in this study, joint-preserving surgery for rheumatoid forefoot deformities led to satisfactory clinical and radiographic improvements, regardless of the severity of joint destruction. LEVEL OF EVIDENCE: Level III, case-control study.

Arthrodesis vs arthroplasty for moderate and severe Hallux rigidus: Systematic review.

Hallux rigidus is the most frequent arthritis of the foot, due to multiple factors. Arthrodesis and interposition arthroplasty are treatments considered in advanced stages of the disease, when conservative treatment has failed. Although arthrodesis may be considered the technique recommended by multiple authors, for patients in whom joint mobility is to be preserved, arthroplasty could represent a reliable alternative. The purpose of this systematic review is to investigate and compare the clinical outcomes and complications of arthrodesis and interposition arthroplasty for moderate and severe stages of hallux rigidus. METHODS: For this systematic review we searched COCHRANE, EMBASE, PUBMED databases. Twenty-six research papers were obtained, with a total of 1348 feet, which were included for qualitative analysis. The following groups were included: Cartiva hemiarthroplasty (286), double stem silicone arthroplasty (276), total metallic arthroplasty (394) and arthrodesis (392). RESULTS: In the arthrodesis group, the AOFAS-HMI score was the most used, ranging from 36 to 45 in the preoperative period and from 79 to 89 in the postoperative period. The greatest improvement in the VAS PAIN score was from 86 to 4. The fusion rate was 98.6% of the total number of cases, the most frequent complication was pain due to material discomfort. In the total metallic arthroplasty group, the ROTO-GLIDE system reported an AOFAS score of 95 points, with low complication rates; but, with the TOEFIT-PLUS and BIOMED-MERCK systems, despite the good postoperative value, they report 37% and 15% revision due to aseptic loosening in the series with the longest follow-up, respectively. The Cartiva group showed a significative increase in FAAM ADL and FAAM SPORT from 59.4 to 90.4 and from 60.9 to 89.7, respectively; similarly, 20.5% implant removal and conversion to arthrodesis were reported. Finally, the double stem silicone arthroplasty group, in the series with the longest follow-up, it manages to improve the MOXFQ score from 78.1 to 11.0, with an average range of mobility of 22.3 degrees. Lysis was reported in 10% of cases. CONCLUSIONS: Arthrodesis has proven to be the best option for the treatment of advanced hallux rigidus. Arthroplasty can be a valid option for patients who demand to maintain the range of mobility of the joint; however, it is important to inform about the complications that may arise in the short and medium term. LEVEL OF CLINICAL EVIDENCE: II.

Incidence of Nonunion of the First Metatarsophalangeal Joint Arthrodesis After Failed Implant Arthroplasty: A Systematic Review.

Joint arthroplasty of the first metatarsophalangeal (MTP) joint is an accepted surgical option for patients with hallux rigidus. However, this procedure has been reported to have a high complication rate and unpredictable survivorship. Implant arthroplasty failure is a devastating complication that results in significant osseous defect with altered biomechanics of the foot. Commonly, salvage options are limited to arthrodesis with bone grafting. However, outcomes are rarely reported. The purpose of this study is to investigate the fusion rates of first metatarsophalangeal joint arthrodesis after conversion from failed implant arthroplasty. A systematic review of electronic databases to find reports of conversion arthrodesis after failed implant arthroplasty was performed. Six studies involving a total of 76 patients with a weighted mean age of 54.9 met the inclusion criteria. Out of the 6 included articles, the nonunion rate was 16.5% at a weighted mean follow-up of 48.1 months. The nonunion rate in the current report is higher than reported nonunion rates of primary arthrodesis. More prospective studies with consistent and standard outcome measures are needed to further determine the success rate of this salvage procedure.Levels of Evidence: 4, Systematic Review of Level 4 Studies.

Surgical Treatment of Metatarsalgia and Severe Instability of Lesser Metatarsophalangeal Joints.

The main object of this prospective cohort study was to compare surgical treatment options for primary metatarsalgia and the severe instability of lesser metatarsophalangeal joints. The outcomes of triple Weil osteotomy combined with direct plantar plate repair and triple Weil osteotomy, performed with proximal interphalangeal joint arthrodesis, are analyzed and compared. One hundred thirteen patients (117 feet) were enrolled in the study. They were split into 2 groups. In the first group, undergoing Weil osteotomy, combined with the plantar plate repair, good results, including complete pain reduction, elimination of hyperkeratosis, and American Orthopedic Foot and Ankle Society Score improvement, were achieved in 84.7% of the cases. The second group, where the combination of Weil osteotomy and proximal interphalangeal joint K-wire arthrodesis was used, demonstrated good results in 52.4% of the cases. Weil osteotomy, combined with the plantar plate repair, achieves better results in comparison to osteotomy, performed with the interphalangeal joint arthrodesis.

Quality and Readability Analysis of Online Information on First Metatarsophalangeal Joint Fusion.

Patients frequently turn to the internet to learn about their orthopedic procedures. This study evaluates the readability and quality of first metatarsophalangeal (MTP) joint fusion information found online. We evaluated websites based on classification, search term, readability, HON code, DISCERN score, Journal of the American Medical Association benchmark criteria, and an author-created MTP fusion index (MFI). The average readability of websites was 8.48 ± 1.99, above the recommended sixth- or eighth-grade reading level. Almost half of all websites (48.98%) provided "poor" information. Keywords had no significant impact on the readability or quality of information. Academic/governmental websites had the highest quality of information, with the highest DISCERN and second highest MFI. Most websites (52.04%) were commercial and were the easiest to read, but had the second lowest DISCERN and MFI scores. Our results suggest that inappropriate information on the MTP joint fusion procedure is abundant online. Academic/governmental websites have the highest quality of information, but may be difficult for patients to comprehend. Many websites do have readable and relevant information. We recommend that physicians create a list of websites with accurate, relevant information for patients to circumvent the misinformation they may find while navigating and reading online.

Great Toe Interphalangeal Fusion for Hallux Valgus Interphalangeus Deformity in Young Patients.

OBJECTIVES: The purposes of this study were to examine indications, radiographic outcomes, and clinical complications for primary arthrodesis of the great toe interphalangeal (IP) joint in young patients. BACKGROUND: Hallux valgus interphalangeus deformity of the great toe is uncommon in the pediatric population and often requires fusion of the IP joint. METHODS: A retrospective review of patients, ages 8 to 19 years, who underwent operative fusion of the great toe IP joint, and had >1 year radiographic follow-up was performed. Medical records and radiographs were reviewed to determine indications for surgery, concomitant procedures, success of fusion, complications, and need for revision procedures or elective hardware removal. Differences between pre and postradiographic outcomes for the hallux valgus angle, IP angle, and intermetatarsal angle were analyzed. RESULTS: Twenty-seven patients (31 feet) were included in the analyses. The average age at fusion surgery was 14.9 years (SD ± 2.3) with a mean follow-up visit of 35.2 months. The most common indications for fusion of the great toe IP joint were pain and deformity. Kirschner wire fixation was utilized in 7 cases, with the remaining 24 cases fixed with a single retrograde cannulated screw. Fifty-five concomitant toe and foot procedures were performed in 21 feet (68%) to address additional foot and toe deformity. Successful fusion occurred in 30 of 31 toes after the primary fusion. Patient satisfaction with the toe position and diminished pain were high (94.1%). Significant improvement was noted in the measure of the IP angle ( P < 0.001), with minimal clinical change in the hallux valgus angle ( P = 0.24) or the intermetatarsal angle ( P = 0.03). CONCLUSIONS: Hallux valgus interphalangeus of the great toe was successfully managed with the fusion of the IP joint. Single screw fixation or the use of Kirschner wires led to similar outcomes. Hardware-related issues with the use of screws were the most common adverse outcome. Patients should be made aware of the possible need for hardware removal after fusion utilizing screw fixation. LEVEL OF EVIDENCE: Level IV-a retrospective case series.

What Do Patients Report Regarding Their Real-World Function Following Concurrent Arthrodesis of the First Tarsometatarsal and First Metatarsophalangeal Joints.

First metatarsal phalangeal joint and the first Tarsometatarsal arthrodesis have both been used for deformity correction and treatment of pain and arthritis. Concomitant arthrodesis of the first metatarsophalangeal and first tarsometatarsal joints (Double First Ray Arthrodesis) has rarely been described. We surveyed 29 patients who underwent double first-ray arthrodesis for primary or revision correction of hallux valgus. A custom questionnaire was used to assess their activities of daily living and sports activity at a mean follow-up of 19.6 months (median 18.4 months). Secondary endpoints were return to activity, deformity correction, and arthrodesis healing rate. The primary outcomes showed an excellent return to activities of daily living with 96.6% of patients capable of walking as much as they liked after surgery at a normal pace. About 96.6% reported they felt that their surgery was successful, they had no pain, and the loss of motion at the joint fusion sites did not affect their ability to perform daily activities. Protected walking in a fracture boot was initiated at a mean (SD) of 9.8 (9.9) days. Return to an athletic shoe occurred at a mean (SD) of 44.2 (11.7) days. Full unrestricted activity was at a mean (SD) of 105.2 (19.3) days with 65% of the patient group reporting that their recovery was easier than expected. There was 1 nonunion and no other complications. This data set supports the hypothesis that patients undergoing double first-ray arthrodesis can return to activities of daily living and sports with and low complication rate.

Immediate Weightbearing Following First Metatarsal Phalangeal Joint Arthrodesis With 2 Nickel Titanium Alloy Staples.

The use of staples has been shown to be a reasonable fixation technique to achieve stability of a first MTPJ arthrodesis. Although it has been shown to be a weaker construct than crossed screws or plate and screw combinations, their ease of insertion, low profile, and stability make them a desirable choice for first MTPJ arthrodesis fixation. However, because of this relative weakness, the question remains whether immediate weightbearing when using staples is advisable. The aim of this study is to determine whether the use of 2 nickel-titanium alloy (NITINOL) staples, placed at 90 degrees to one another is a stable enough construct to support full, immediate weightbearing following first MTPJ arthrodesis. We performed a retrospective chart review of patients undergoing first MTPJ arthrodesis by a single surgeon utilizing 2 NITINOL staples placed at 90 degrees to one another. Patients were allowed to be fully weightbearing immediately postoperatively. Forty-seven of 50 (94%) patients achieved complete radiologic consolidation of fusion at 12 weeks, with only 3 requiring revision surgery for nonunion. All of the patients requiring revision surgery for nonunion, had preoperative diagnosis of hallux abducto valgus. We concluded that the use of 2 NITINOL staples placed at 90 degrees to one another is a viable option for first MTPJ arthrodesis, and immediate weightbearing does not increase rate of nonunion or incidence of revision surgery when compared to other fixation techniques.

Evaluate the Influencing Factors of Congruency of the First Metatarsophalangeal Joint in Hallux Valgus Based on Weightbearing CT.

The purpose of this study was to explore the difference between congruency and incongruency of the first metatarsophalangeal (MTP) joint in hallux valgus using weightbearing CT (WBCT) and to identify the risk factors for incongruency. From January 2019 to January 2021, WBCT scans were retrospectively analyzed for 110 (191 feet) consecutive patients. According to whether the metatarsal articular surface and phalanx articular surface were parallel, they were divided into congruency (73 feet) and incongruency groups (118 feet). The age, intermetatarsal angle (IMA), hallux valgus angle (HVA), distal metatarsal articular surface angle (DMAA), first metatarsal coronal pronation angle (α angle), tibial sesamoid 7 positions (TSP), and tibial sesamoid coronal grading (TSCG) were compared between the 2 groups. Binary logistic regression was used to analyze the influencing factors of incongruency. Receiver operating characteristic (ROC) curve analysis was applied to determine the cutoff value. There were significant differences in IMA, HVA, DMAA, α angle, age, TSP, and TSCG between congruency and incongruency groups (p < .05). Binary logistic regression analysis showed that TSCG, HVA, α angle were the influencing factors of incongruency. ROC curve analysis demonstrated that the cutoff values for incongruency were 1 position for TSCG (sensitivity: 0.835; specificity: 0.884) with the area under curve (AUC) of 0.892, 30° (sensitivity: 0.795; specificity: 0.812) for HVA with the AUC of 0.878, and 24° (sensitivity: 0.530; specificity: 0.797) for α angle with the AUC of 0.686. Incongruency of the first MTP joint indicated a more severe hallux valgus, and was associated with increased HVA, α angle, and TSCG.

How Important Is a Lesser Metatarsal Osteotomy in Preventing Second Hammertoe Recurrence?

Hammertoes with greater preoperative transverse plane deformity are more likely to recur after corrective surgery; however, it is unclear whether this represents an inherent (fixed, nonmodifiable) risk, or whether steps can be taken intraoperatively to mitigate this risk. In this study, we examined whether transverse plane transposition and/or shortening of the second metatarsal during second hammertoe surgery influenced recurrence. We performed a secondary analysis of pre-existing data from patients that had previously undergone second hammertoe surgery at our institution between January 1, 2011 and December 31, 2013. One hundred two patients (137 toes) were followed for a mean 28 ± 7.8 months postoperatively. Thirty-seven toes required, at the surgeon's discretion, an additional/concomitant Weil metatarsal osteotomy. Magnitude of transverse plane transposition and shortening of the second metatarsal, and joint angular measurements were obtained from the second metatarsophalangeal joint on weightbearing AP radiographs preoperatively and at 6 to 10 weeks postoperatively. Cox regression analysis was used to identify predictors of hammertoe recurrence using these new variables and a set of known predictors. In the final regression model, failure to establish a satisfactory postoperative metatarsal parabola (i.e., long second metatarsal; Nilsonne values <-4 mm, multivariate hazards ratio [HR] 1.96, p = .097), and intraoperative lateral transposition of the metatarsal head (multivariate HR 3.45, p = .028) seemed to confer additional risk for hammertoe recurrence. We conclude that shortening osteotomies may be assistive in some individuals, while further inquiry is still needed to determine whether similar benefits can be derived from medial head transposition in medial toe deformities.

Minimally Invasive Versus Open Hammertoe Correction: A Retrospective Comparative Study.

Hammertoe deformity is a common forefoot pathology, characterized by a progressive deformity with dorsiflexion of the proximal phalanx on the metatarsal head at the metatarsal phalangeal joint (MTPJ) and plantarflexion of the intermediate phalanx on the proximal phalanx at the proximal interphalangeal joint (PIPJ). While there is literature available discussing open techniques for hammertoe correction, there is a lack of publications discussing minimally invasive techniques, therefore the objective of this retrospective comparative study is to evaluate minimally invasive versus open hammertoe surgery in terms of time to osseous union, complications, recurrence, and return to full activity. Sixty eight feet among 41 patients met the inclusion criteria and were surveyed. Among the 68 feet, 54 feet (124 toes) underwent minimally invasive hammertoe correction and 14 feet (22 toes) underwent open hammertoe correction. Time to osseous union (weeks) in the MIS group was 8.76 ± 2.31 weeks with similar outcomes to the open group with union at 8.42 ± 2.31 (p = .65). Return to activity (weeks) was 10.47 ± 3.45 in the MIS group and 9.92 ± 3.03 in the open group with no statistical significance (p = .62). There was 4 recurrent hammertoe deformities in the MIS group (3.23%) with no recurrent hammertoes in the open group (0%). In the MIS group 5 hammertoes had unplanned hardware removal (4.03%) compared to 0 in the open group. There was no statistical significance for both recurrence and unplanned hardware removal (p = 1). Overall, we concluded that both techniques are equivocal with no detectable statistical difference.

Ten-Year Minimum Follow-up Study of First Metatarsophalangeal Joint Fusion in Young vs Old Patients.

BACKGROUND: Painful degenerative joint disease (DJD) of the first metatarsophalangeal joint (MTP I), or hallux rigidus, mainly occurs in later stages of life. For end-stage hallux rigidus, MTP I arthrodesis is considered the gold standard. As young and active patients are affected considerably less frequently, it currently remains unclear, whether they benefit to the same extent. We hypothesized that MTP I arthrodesis in younger patients would lead to an inferior outcome with decreased rates of overall with lower rates of patient postoperative pain and function compared to an older cohort. METHODS: All patients aged <50 years who underwent MTP I arthrodesis at our institution between 1995 and 2012 were included in this study. This group was then matched and compared with a group of patients aged >60 years. Minimum follow-up was 10 years. Outcome measures were Tegner activity score (TAS), a "Virtual Tegner activity score" (VTAS), the visual analog scale (VAS), and the Foot Function index (FFI). RESULTS: Sixty-one MTP I fusions (n = 28 young, n = 33 old) in 46 patients were included in our study at an average of 14 years after surgery. Younger patients experienced significantly more pain relief as reflected by changes in VAS and FFI Pain subscale scores. No difference in functional outcomes was found with change in the FFI function subscale or in the ability to have desired functional outcomes using the ratio of TAS to VTAS. Revision rate did not differ between the two groups apart from hardware removal, which was significantly more likely in the younger group. CONCLUSION: In patients below the age of 50 years with end-stage DJD of the first metatarsal joint, MTP I arthrodesis not only yielded highly satisfactory postoperative results at least equal outcome compared to an older cohort of patients aged >60 years at an average 14 years' follow-up. Based on these findings, we consider first metatarsal joint fusion even for young patients is a valid option to treat end-stage hallux rigidus. LEVEL OF EVIDENCE: Level III, a case-control study.

Particulate synovitis granuloma complication following a first metatarsophalangeal joint silastic implant.

This case presents a known complication of particulate synovitis granuloma associated with a first metatarsophalangeal joint silastic implant. However, the degree of soft tissue granuloma enlargement is quite unique in size and its proliferative effect-invading the medulla cavity and infiltrating the outer cortex of bone. This case study aims to demonstrate its clinical presentation, imaging investigations, surgical excision and histopathology findings. The learning points emphasised within this manuscript draw attention to the procedure selection for a silastic implant, as well as its proposed mode of action and various potential associated complications. Surgery was based on careful analysis of overall function, prior surgery conducted and patient expectations to achieve a shared decision-making process.

Which parameters predict correction of the intermetatarsal angle after first metatarsophalangeal fusion?

Fusion of the first metatarsophalangeal joint (MTPJ) is a commonly performed surgical procedure. Although the effect of first MTPJ fusion on reduction of Intermetatarsal angle (IMA) is well described, contributing factors remain unclear. The aim of this study was to identity predictive parameters for IMA reduction. Fifty-one patients (68 feet) who underwent a first MTPJ fusion and had an IMA greater than fourteen degrees were assessed retrospectively. The average age was 68 (31.4-79.3) years. Sixteen demographic and radiographic variables were evaluated using a multivariate regression analysis for association with change in IMA after surgery. The mean preoperative IMA was 16.11 (range, 14.0-22.5) degrees with a mean reduction of 4.95 (range, 0-17) degrees after surgery. Multivariate regression analysis revealed three significant independent predictors of the change in IMA. Increased preoperative IMA (ß = .663, CI = .419, .908, P <.001), increased preoperative translation at base of MT1 (ß = .490, CI = 0.005, .974, P = 0.039), and less postoperative translation in the fusion (ß= -0.693, CI= -1.054, -.331, P= 0.002) significantly increased the amount of IMA reduction. Pre-operative IMA and translation at the base of the first metatarsal were positive predictors for correction of IMA after first MTPJ fusion. Translation at the level of the MTP I fusion was a negative predictor for the amount of IMA correction. Based on these findings, we recommend minimizing the lateral translation of the proximal phalanx relative to the metatarsal head to optimize IMA correction after MTPJ fusion.

Arthrocentesis approaches to the phalangeal joints of the one humped camel (Camelus dromedarius).

Irrespective of the exceptional adaptation of dromedaries to harsh environmental conditions, they remain highly susceptible to joint lameness resulting from a range of diverse factors and conditions. The joints most often affected by traumatic osteoarthritis in dromedaries are the metacarpophalangeal and metatarsophalangeal joints. A comprehensive understanding of joint anatomy and topography of the dromedary is required to perform arthrocentesis correctly on affected joints. Forty-two distal limbs were taken from 28 camels and studied by gross dissection, casting, ultrasonography, and computed tomography (CT). Representative three-dimensional models of the joint cavities, recesses, and pouches were obtained using different casting agents. This study provides a detailed description of dorsally, axially, and abaxially positioned joint recesses, as well as palmar/plantar positioned joint pouches. The safety and feasibility of the different arthrocentesis approaches were evaluated. The traditional dorsal arthrocentesis approach of the metacarpophalangeal, metatarsophalangeal, proximal interphalangeal, and distal interphalangeal joints, has limitations due to the risk of damaging the tendon structures and articular cartilage, which can lead to joint degeneration. A lateral arthrocentesis approach via the proximal palmar/plantar pouches of the metacarpophalangeal/metatarsophalangeal and proximal interphalangeal joints is recommended. This approach eliminates the potential needle injury to the articulating joint cartilage and other surrounding joint structures, such as tendons, blood vessels, and nerves.

Preoperative degree of deformity and underlying disease affect the postoperative deformity of joint-preserving hallux valgus surgery.

BACKGROUND: The combination of distal osteotomy with lateral dissection in joint-preserving surgery for severe hallux valgus deformity has recently begun to yield encouraging results. We examined the frequency of complications and risk factors of those for joint-preserving surgery in patients with and without rheumatoid arthritis (RA). METHODS: A retrospective, observational study of 72 feet (27 patients with RA) was performed. The inclusion criteria were patients who underwent joint-preserving surgery for hallux valgus deformity at our hospital between January 2008 and March 2016 who could be followed up with for longer than 12 months. RESULTS: The mean preoperative and immediate postoperative hallux valgus angles (HVA) were 41.8 and 4.4, respectively. The mean preoperative and immediate postoperative intermetatarsal angles between the first and second metatarsal bones (M1-M2A) were 14.6 and 5.8, respectively. At the final postoperative evaluation, the mean HVA was 8.8 and the mean M1-M2A was 6.4.Data were compared among the patients with complications (recurrent valgus deformity, varus deformity), and those without complications (normal HVA) at the final postoperative evaluation. The rate of RA in the varus deformity group was 71.4%, which tended to be higher than in other groups (p = .058). The mean preoperative HVA were 48.2 and 52.6 in the group of recurrent valgus deformity and varus deformity, which was higher than the normal HVA group (p = .001). CONCLUSIONS: High preoperative HVA was a risk factor for the recurrence of valgus deformity. Most of the varus deformities were observed in the RA group with high preoperative HVA; therefore, caution should be exercised in operating on patients with severe deformity or those with RA. LEVEL OF EVIDENCE: III.