Valgus Deformity Research Articles

Association Between Postoperative Medial-Middle Intercuneiform Joint Widening and Recurrence Rates in Hallux Valgus Treated With Modified Lapidus Procedure.

Although an association between intercuneiform (C1-C2) joint instability and the recurrence of hallux valgus (HV) deformity after the modified Lapidus procedure has been suggested, there is currently no radiographic evidence to support it. This study aims to investigate radiographic changes in the C1-C2 joint after the modified Lapidus procedure for HV correction, using weightbearing computed tomography (WBCT). This retrospective cohort study included 52 feet (50 patients) with HV who underwent modified Lapidus procedure and had preoperative and postoperative WBCT. Patients who had an additional transfixation screw between the first and second ray were excluded. The preoperative and average 6.5 months postoperative C1-C2 distance, C1-C2 angle, and C1-ground angle were measured on coronal multiplanar reconstructed WBCT images. Radiographic parameters between the recurrence group (n = 9) and nonrecurrence group (n = 43) were compared. Recurrence of HV deformity was characterized by a postoperative hallux valgus angle (HVA) greater than 20 degrees. Nine of 52 patients (17.3%) had recurrence of their HV deformity. The recurrence group had greater changes in the C1-C2 distance; the median widening in the recurrence group was 0.7 mm (IQR, 0.6-0.8), whereas the nonrecurrence group was 0.3 mm (IQR, 0.1-0.4, P < .001). Regression analysis showed that increase in the C1-C2 distance were significantly associated with recurrence (odds ratio, 1.79; 95% CI, 1.18-3.77; P = .0015). Although no preoperative imaging parameters were associated with a change in the C1-C2 distance, increasing postoperative sesamoid position (r = 0.32, P = .022) and HVA (r = 0.28, P = .046) were correlated with a greater change in the C1-C2 joint gapping. Our study results suggest a possible association between early postoperative widening of the C1-C2 joint and the recurrence of the HV deformity following a modified Lapidus procedure. This raises, but does not answer, the question as to whether the routine stabilization of intercuneiform joint directly or indirectly may help reduce the rate of hallux valgus recurrence when performing the modified Lapidus procedure.

Uncompromised total knee arthroplasty function after distal femoral osteotomy.

Distal femoral osteotomies (DFOs) are commonly used for the correction of valgus deformities and lateral compartment osteoarthritis. However, the impact of a DFO on subsequent total knee arthroplasty (TKA) function remains a subject of debate. Therefore, the purpose of this study was to determine the effect of a unilateral DFO on subsequent TKA function in patients with bilateral TKAs, using the contralateral knee as a self-matched control group. The inclusion criteria consisted of patients who underwent simultaneous or staged bilateral TKA after prior unilateral DFO between 1972 and 2023. The type of osteotomy performed, osteotomy hardware fixation, implanted TKA components, and revision rates were recorded. Postoperative outcomes including the Forgotten Joint Score-12 (FJS-12), Tegner Activity Scale score, and subjective knee preference were also obtained at final follow-up. A total of 21 patients underwent bilateral TKA following unilateral DFO and were followed for a mean of 31.5 years (SD 11.1; 20.2 to 74.2) after DFO. The mean time from DFO to TKA conversion was 13.1 years (SD 9.7) with 13 (61.9%) of DFO knees converting to TKA more than ten years after DFO. There was no difference in arthroplasty implant systems employed in both the DFO-TKA and TKA-only knees (p > 0.999). At final follow-up, the mean FJS-12 of the DFO-TKA knee was 62.7 (SD 36.6), while for the TKA-only knee it was 65.6 (SD 34.7) (p = 0.328). In all, 80% of patients had no subjective knee preference or preferred their DFO-TKA knee. Three DFO-TKA knees and two TKA-only knees underwent subsequent revision following index arthroplasty at a mean of 12.8 years (SD 6.9) and 8.5 years (SD 3.8), respectively (p > 0.999). In this self-matched study, DFOs did not affect subsequent TKA function as clinical outcomes, subjective knee preference, and revision rates were similar in both the DFO-TKA and TKA-only knees at mean 32-year follow-up.

Percutaneous Screw Fixation for the Management of Delayed Unions in Pediatric Lateral Humeral Condylar Fractures.

The use of in situ screw fixation for the treatment of pediatric lateral humeral condyle (LCH) delayed unions has recently been reported. While attractive, the currently available literature consists of small retrospective studies with mixed results. As such, the present study aims to describe the outcome of a group of children with delayed unions of LCH fractures treated with in situ fixation using a single, percutaneously placed cannulated screw in compression. A retrospective review of all pediatric patients (below 18y) with lateral condyle fractures of the humerus treated surgically for delayed union between 2013 and 2023 at a single, tertiary referral center was completed. Clinical and radiologic variables related to the initial injury and delayed union were abstracted from the medical record, as were surgical variables. Radiographs were evaluated for union postoperatively; time to union was determined by the senior authors. Descriptive statistics were used to summarize demographic and outcome variables. A total of 12 consecutive patients met the inclusion criteria. The mean age at the time of initial injury was 5.6 years; subjects were followed for a mean of 3.0 years following initial presentation. All were treated with a single, percutaneously placed screw in compression at a mean of 10.5 months after the original injury. Radiographic union was achieved in 11 (91.7%) patients. At the latest follow-up, all patients were pain free and demonstrated a functional arc of motion without evidence of avascular necrosis. A total of 2 patients required revision for loss of fixation. In one patient, a persistent lucent line was observed, and 1 patient was found to have a cubitus valgus deformity, both of which were not clinically relevant. Our results suggest that with the use of proper technique (a 4.5 cannulated screw inserted through the metaphyseal portion of the lateral condyle fragment, engaging the most medial/distal aspect of the humeral shaft), radiographic union and clinical healing can be achieved in the majority of patients. Percutaneous screw fixation should be considered as an option for cases of noninfected pediatric lateral condyle delayed unions. Level IV-evidence therapeutic studies.

Tarsal Coalition Resection in Children: Is it Effective?

Tarsal coalitions in children are a group of disorders that typically present as a rigid flatfoot deformity. Operative treatment generally consists of resecting the coalition alone or resection plus flatfoot reconstructive procedures. The purpose of this study was to evaluate the rate and risk factors for complications, including infection, recurrence, and reoperation, following the surgical management of tarsal coalitions in children. This is a retrospective cohort study on the surgical outcomes of pediatric tarsal coalitions alone or in combination with adjunctive procedures. This study was conducted between 01/01/2008 and 12/31/2019 and utilized electronic health records and chart review was performed to describe patient demographic, clinical, perioperative characteristics, and whether patients have subsequent foot and ankle procedures after the index resection surgery. The study cohort included 165 feet belonging to 144 patients. The age range at time of surgery was 12 years of age (11-14). Of the 165 feet, 18 (10.9%) experienced a postoperative complication, including six infections of which two required reoperation, six recurrences all requiring reoperation, and six reoperations not due to recurrence. Patients with a postoperative complication demonstrated increased age (13.9 years vs 12.4 years, p=0.007), obesity (33.3% vs 13.6%, p=0.026), and/ or preoperative hindfoot valgus deformity (33.3% vs 7.5%, p=0.004). The overall postoperative complication rate was 10.9%. Results of this study provided important information for providers as they discuss different treatment approaches and anticipated outcomes with patients and their families.

The Effect of Towel Toe Curl Exercise and Tibialis Posterior Strengthening on Dynamic Balance of Flatfoot Patients at SD Negeri 104242 Lubuk Pakam

Background: Improper use of the foot can cause problems when walking and even endanger a person's health. The arch of the foot helps withstand impact pressure and provides stability when standing or walking. Flatfoot is a deformity related to the foot, such as medial longitudinal arch disorders of the foot, valgus deformity of the heel, and forefoot abduction. The exercise methods that can be given to overcome flatfoot are Towel toe curl exercise and tibialis posterior strengthening. Purpose: to improve foot function by strengthening the intrinsic muscles of the foot. While tibialis posterior strengthening exercise is to strengthen the tibialis posterior muscle, which is part of the extrinsic muscle. Research method: This type of research is quantitative with a one group pre-test and post-test design. Data analysis using paired sample t-test. The sample of this study were children at SD Negeri 104242 Lubuk Pakam who suffered from flatfoot with a total of 22 samples. The intervention given was towel toe curl and tibialis posterior strengthening 3 times a week for 4 weeks with a total of 12 actions. Before the dynamic balance intervention, respondents were measured first (pretest) with the Y Balance Test (YBT) and re-measured after the intervention (Posttest). Results and discussion: The results of the paired sample t-test obtained a significant value (p) of 0.000, greater than the alpha value (a) (0.000 &lt;0.05), meaning that there is a significant effect of towel toe curl exercises and tibialis posterior strengthening on improving dynamic balance in flatfoot children. Conclusion: Based on the results of the study, it can be concluded that towel toe curl exercises and tibialis posterior strengthening can be one of the training methods that can be applied to overcome dynamic balance disorders in flatfoot sufferers

The lateral approach for total knee arthroplasty in valgus osteoarthritis provides similar clinical and radiological results compared with the medial approach.

In total knee arthroplasty (TKA), valgus deformities require special approaches to achieve precise mechanical axis correction and joint stability. This study aimed to determine whether the lateral approach without tibial tubercle osteotomy allows mechanical axis correction in valgus knee osteoarthritis (OA), which is at least as effective as the medial approach, while also assessing whether it provides clinically comparable results and complications. A total of 204 patients undergoing TKA for valgus knee OA were included in this retrospective comparative study, with 131 patients in the lateral approach group and 73 patients in the medial approach group. The surgical goal was to achieve stability with a neutral axis based on mechanical alignment. Detailed pre- and postoperative clinical and radiographic data were obtained, including measurements of the hip-knee-ankle angle (HKAA) and patella tilt angle. Functional status was determined based on the Oxford Knee Score (OKS). Age, body mass index, sex and preoperative HKAA were adjusted between both groups using propensity score matching (n = 45 per group). In the propensity score-matched cohort, the postoperative HKAA did not show differences when comparing the lateral and the medial approach at a mean follow-up of 19.7 months (p = 0.385). The achieved correction of the patella tilt angle was higher in the lateral approach group in the overall (p < 0.001) and matched cohort (p < 0.001). No differences were detected regarding the postoperative OKS and complications. However, wound healing disorders showed a tendency to be more prevalent in patients who underwent the lateral approach in the overall cohort (6.1%, n = 8 vs. 0.0%, n = 0, p = 0.053) but not in the propensity score-matched cohort (p = 0.494). This study demonstrated that for pronounced valgus OA, the lateral approach achieves favourable results in HKAA correction, patellar tilt and complications comparable to the medial approach. However, the risk of wound healing disorders appears higher with severe valgus deformity. Level III therapeutic study.

Simulation of osteotomy in total knee arthroplasty with femoral extra-articular deformity assisted by artificial intelligence: a study based on three-dimensional models

BackgroundThe impact of extra-articular deformities (EADs) on lower limb alignment and collateral ligament integrity during total knee arthroplasty (TKA) poses significant challenges, increasing surgical complexity. Our study aims to evaluate the influence of EADs on mechanical axis alignment and the risk of collateral ligament injury during TKA using an AI-assisted surgical planning system, with the goal of minimizing ligament damage through precise and scientific planning.MethodsA healthy volunteer underwent CT and MRI scans of the lower limbs. The scan images were imported into Mimics 20.0 software, and the reconstructed models were spatially aligned using 3-maticResearch 11.0 software. Using Unigraphics NX9.0 software, 50 three-dimensional models of femoral lateral joint deformities with varying positions and angles were created. Finally, TKA was simulated using the AI JOINT preoperative planning system.ResultsThe larger the deformity angle and the closer it is to the knee joint, the more pronounced the deviation of the mechanical axis. During MA-aligned osteotomy, nine types of deformities can damage the collateral ligaments. After adjusting the varus/valgus of the prosthesis within a safe range of 3° and leaving a residual 3° varus/valgus in the lower limb alignment, only the 25° varus and 25° valgus deformities located at 90% of the femoral anatomical axis remain uncorrected.ConclusionFor patients with osteoarthritis and concurrent EAD undergoing TKA, using reconstructed 3D models of the collateral ligaments for preoperative planning helps visually assess collateral ligament damage, providing a practical solution. Minimizing intra-articular osteotomies within a safe range and allowing some residual alignment deviation can reduce the risk of collateral ligament injury.

Differences in foot morphology across age groups for women active in sport.

Foot morphology in the general population has been shown to change with age and active older adults have reported a need for wide-fitting footwear. This study recruited 374 women active in racket sports and team sports in the United Kingdom who had their feet scanned while 50% weight bearing. Participants were grouped into 10-year age bands ranging from 18-29 years to 70-79 years. Data analysis was performed on the widths, heights and circumferences of participants' right feet normalised to foot length, as well as an assessment of hallux valgus angle and deformity. The 18-29-year group had significantly smaller in measures of foot width, ball of foot circumference and short heel circumference (p&lt;0.05, η2 =0.042- η2 =0.056) compared to the older groups. The foot dorsum height and circumference at 50% foot length were significantly less in the oldest age groups compared to the middle age groups (p= 0.0001, η2 = 0.055 and p= 0.0007, η2 = 0.044 respectively). There was some evidence of increased hallux valgus deformity with age. Designers and manufacturers of athletic footwear should be aware of the changes in footwear morphology with age in order to provide more inclusive footwear.

Zigzag tenotomy of the extensor hallucis longus through minimally invasive surgery in cadaveric specimens: description of a new technique

BackgroundLengthening of the extensor hallucis longus (EHL) is performed to address various forefoot pathologies. The retraction of this tendon is strongly associated with the Hallux Abductus Valgus (HAV) deformity. Minimally Invasive Surgery (MIS) lengthening of the EHL is carried out in combination with other surgical techniques for HAV bone realignment. It is performed without ischemia, using local anesthesia and sedation if required by the patient. One of the advantages of this technique is immediate ambulation with a postoperative shoe without the need for a cast. The objective of the research was to demonstrate the efficacy and safety of the minimally invasive technique for lengthening the tendon in patients with HAV.Materials and methodsThe procedures were performed on 11 fresh cryopreserved cadaveric feet. HAV surgery was performed through dorsomedial and dorsolateral portals for Reverdin-Isham, Akin and adductor tenotomy. In addition, EHL tendon elongation was performed using the Beaver 67 MIS scalpel through an incomplete zigzag tenotomy. The specimens used did not present any type of disease nor had they undergone previous surgeries that could affect the technique. First, the plantar flexion of the metatarsophalangeal joint was measured with a goniometer to establish the degrees of this joint before proceeding with the technique, the tenotomy was performed and remeasured and finally the osteotomy was performed. In addition, an anatomical dissection of cadaveric specimens was performed and various anatomical and surgical relationships were analyzed and measured.ResultsThe data indicate that, after performing zigzag tenotomy, there is an average improvement of 13.91 degrees in plantar flexion.ConclusionsThe study confirms the effectiveness and safety of elongating the extensor hallucis longus tendon of the hallux using minimally invasive surgery. The zigzag technique for tendon elongation may be considered a viable minimally invasive treatment option for addressing tendon hyperextension in patients with HAV.

Comparative analysis of medial pivot vs. posterior stabilized total knee arthroplasty in patients with valgus deformed osteoarthritic knees: a retrospective cohort study.

Total knee arthroplasty (TKA) is highly effective for end-stage knee osteoarthritis, providing long-term benefits and anticipated increased prevalence. The study compares Medial Pivot TKA's (MP-TKA) historical success for varus deformities with recent findings suggesting comparable outcomes for valgus deformities. Despite prevalent use of Posterior Stabilized TKA (PS-TKA) for valgus deformities, this research explores the unexplored comparative efficacy of MP-TKA vs. PS-TKA in knee osteoarthritis patients with valgus deformity. This single-centrecohort study focused on 57 knees in 53 patients undergoing TKA for knee osteoarthritis with valgus deformity. Conducted between January 2013 and April 2021, the study compared MP-TKA and PS-TKA. Surgeries adhered to a medial parapatellar approach and modified gap technique, with perioperative interventions for pain, bleeding, and swelling. Outcome measurements included knee joint range of motion, radiographic evaluation, patients-reported outcomes, operative time, blood laboratory tests, estimated blood loss, and postoperative adverse events, and analyzed between the two groups. Postoperative hip-knee-ankle angles showed no significant difference between MP-TKA and PS-TKA. The pie crust technique was similarly used in both groups, and deformity correction showed no significant difference. Range of motion and clinical outcomes, measured by WOMAC and JOA scores, were comparable postoperatively. MP-TKA had a shorter surgical duration (p = 0.01), and PS-TKA exhibited higher estimated blood loss (p = 0.01) without significant complications in either group. This pioneering study compares the outcomes of MP TKA and PS TKA in patients with valgus-deformed osteoarthritic knees. Compared to PS TKA, MP TKA shows a prolonged operative duration and increased blood loss, likely due to the requirement for patellar replacement. However, postoperative range of motion and clinical outcomes are similar. Both groups exhibit favorable midterm clinical results, supporting the viability of MP TKA for valgus deformed knees. The study, consistent in surgical approach, highlights MP TKA's effectiveness for valgus deformities.

Arthroscopically Assisted Reconstruction of Lateral Metatarsosesamoid Suspensory and Lateral Metatarsophalangeal Collateral Ligaments in the Management of Iatrogenic Hallux Varus Deformity

The medial and lateral metatarsosesamoid suspensory ligaments together with the sesamoid apparatus are the main contributors to the rotational stability of the first metatarsophalangeal joint (MTPJ). Rotational instability of first MTPJ is a major factor in the development of hallux valgus and varus deformities. As the great toe starts to rotate, the muscle pulls across the first MTPJ, causing it to become imbalanced and lead to progressive medial or lateral deviation of the great toe. The gold standard and most reliable option for hallux varus deformity is first MTPJ fusion. However, it results in stiffness and loss of joint function and is reserved for arthritic and stiff first MTPJ. Flexible iatrogenic hallux varus is corrected by optimally anatomic ligament reconstruction. The purpose of this Technical Note is to describe the details of arthroscopically assisted reconstruction of lateral metatarsosesamoid suspensory and lateral metatarsophalangeal collateral ligaments in management of iatrogenic hallux varus deformity. We reconstruct the lateral metatarsosesamoid suspensory ligament to restore the rotational stability of the first MTPJ in hallux varus deformity. This together with reconstruction of the lateral metatarsophalangeal collateral ligament anatomically corrects both the medial deviation and rotation deformity of the great toe.

Midterm functional outcomes of synthetic cartilage implant (SCI) arthroplasty for hallux rigidus

Hallux rigidus is a common degenerative condition of first metatarso-phalangeal joint most commonly affecting patients above 50 years of age. The aim of our study is to evaluate the five-year results of synthetic cartilage implant (Cartiva) arthroplasty for hallux rigidus. A retrospective study of 70 patients who underwent synthetic cartilage implant interpositional arthroplasty were collected and analysed. Patients with Grade 3 to 4 hallux rigidus and who had failed conservative management were included. Patients who had previous forefoot surgery, hallux varus or valgus deformity of more than 250 and neuromuscular disease were excluded. Mean age at the time of operation was 63.4 years (range 42–84 years). The mean follow-up was 62.6 months. The functional evaluation was done using Manchester-Oxford Foot Questionnaire (MOxFQ). EQ-5D and EQVAS.86 patients were matriculated in the study with 70 patients being assessed at five years. The average preoperative MOxFQ score improved from 35.74 (31.44-40.04) to 19.11 (11.31- 26.91) at one year after surgery. The EQ-5D scores improved from preoperative average of 9.40 (8.14-10.66) to 4.26 (2.09-6.43) at one year. The preoperative EQVAS was 61.66 (51.25-72.07) to 71.45 (60.87-82.03 at one year. At five years follow up the average MOxFQ score was 17.6 (9.92-24.38), EQ-5D - 4.8 (2.26- 6.45) and EQVAS – 72.48 (62.40-82.56). Three patients had revision to first MTP fusion due to ongoing pain.Synthetic cartilage implant has demonstrated clinical efficacy and good functional outcomes at the end of five years for the treatment of Hallux rigidus.Level of Clinical Evidence: 4

Factors influencing the speed of correction speed of distal tibial valgus deformity in children with percutaneous epiphyseodesis using transphyseal screw

IntroductionThe distal tibial valgus deformity in children mimics a hindfoot valgus and is observed in several conditions of both non-neurogenic and neurogenic origin. The deformity can only be detected with radiological examination and can be safely and effectively corrected in children with medial percutaneous epiphysiodesis using transphyseal screws (PETS). The aims of the study are: 1. to determine the correction rates of the distal tibial valgus deformity due to different pathologies, 2. to examine the correction rate in relation to the age at implantation, severity of the initial deformity and the duration of implantation, 3. and types of foot deformities associated with the deformity. Materials and methodsA retrospective study was done on children who underwent a PETS for a distal tibial valgus deformity. The lateral distal tibia angle 89° ± 3° on ankle mortice x-rays was taken as normal. An analysis of variance and covariance was done to investigate differences in parameters between aetiologies and relations between parameters respectively. ResultsFollowing exclusion of 191 limbs, 155 limbs in 104 children were included the study, 5 groups could be identified: Idiopathic, ICP (cerebral palsy), MMC (Meningomyelocele), Dysmelia, MHE (multiple hereditary exostosis). The mean age at implantation of all patients was 10.9 ± 1.4 years. The average correction of 0.45° ± 0.08°/month with no significant differences in the correction rates between groups. However, the correction rates were dependent on the age, the initial deformity and the duration of treatment. The incidence of a valgus foot deformity was 86.4 %. ConclusionThe correction rates of the distal tibial valgus deformity following PETS are variable and depend, on the age at implantation, duration of treatment and initial deformity. The spectrum of foot deformities associated with distal tibial valgus deformity, especially a high prevalence of valgus foot deformity warrants an ankle mortice x-ray. Level of EvidenceLevel III, retrospective study

Investigation of the relationship between hallux valgus, quadriceps angle, and body image perception in young adults

Purpose: Our study aimed to identify the presence and severity of hallux valgus deformity in young adults, using both by the Manchester classification and goniometry, to evaluate the Quadriceps angle (Q angle), and to examine the relationship between some anatomical parameters and body image perception. Materials and Methods: A total of 158 individuals aged 18-30 (111 females, 47 males) who voluntarily agreed to participate in the study were included. Demographic characteristics, Quadriceps angle, and hallux valgus angle were measured. Hallux valgus and Quadriceps angles were determined using a goniometer, while the Manchester scale was employed to evaluate the level of Hallux valgus deformity. The Golden Ratio for the lower extremity was calculated by taking the ratio of lower extremity length to leg length, and the body image perception score was determined. Results: Body weight, height and body mass index showed statistically significant differences in terms of gender, while age parameter did not show statistically significant difference between genders. Also, no significant difference in Quadriceps angle was observed between genders for both right and left sides, while a significant difference in Hallux valgus angle was noted. A high, positive, and significant relationship was found between Manchester classification and hallux valgus, while Golden ratio values did not significantly differ by gender. Additionally, body image perception scores were higher in males (162.60±25.45 points) than in females (153.51±25.89 points). Conclusion: Deviations from their normal values of the hallux valgus and quadriceps angle which affect the musculoskeletal system, may lead to some health problems, as well as difficulties in performing daily life activities, and concerns about aesthetics. Failure to fulfil one’s normal functions or not to find oneself aesthetically insufficient will also make it likely that the body image perception will deteriorate.

No Radiographic Evidence of Medial Collateral Ligament Elongation in Valgus Osteoarthritic Knees Enables Treatment with Kinematically Aligned Total Knee Arthroplasty.

When performing caliper-verified kinematically aligned total knee arthroplasty (KA TKA) in the osteoarthritic (OA) knee with valgus deformity, an elongated medial collateral ligament (MCL) could result in a valgus setting of the tibial component. The present study analyzed KA TKA in patients with valgus deformities (i.e., tibiofemoral angle > 10 degrees of valgus) and determined (1) the occurrence of radiographic MCL elongation, (2) the incidence of lateral collateral ligament (LCL) and posterior cruciate ligament (PCL) release and the use of constrained components, and (3) whether the 1-year Forgotten Joint Score (FJS), Oxford Knee Score (OKS), Knee Injury and Osteoarthritis Outcome Score for Joint Replacement (KOOS JR), and Likert satisfaction score were comparable to KA TKAs for OA deformities ≤10 degrees of valgus. One hundred and two consecutive patients who underwent KA TKA by a single surgeon were analyzed radiographically and clinically at a minimum follow-up of 1 year. Radiographic MCL elongation was identified by a greater than 1 degree of valgus orientation of the tibial component relative to the OA tibial joint line. Twenty-six patients had a radiographic anatomic tibiofemoral angle greater than 10 degrees of valgus (range of OA deformity: 11-23 degrees of valgus). Seventy-six had an OA deformity ≤10 degrees of valgus (10-degree valgus to -14-degree varus). No patient had MCL elongation or a ligament release, or required constrained components. The median FJS of 78, OKS of 42, and KOOS JR of 76, and the 85% satisfaction rate of the patients with greater than 10 degrees of OA valgus deformity were not significantly different from those with ≤10 degrees of OA valgus deformity (p ≥ 0.17). Because MCL elongation was not detected in OA deformities up to 23 degrees of valgus, the risk of under-correcting the valgus deformity leading to instability and poor outcome scores is low when performing KA TKA using primary components without releasing the LCL and/or PCL. LEVEL OF EVIDENCE:: IV.

Medial open wedge osteotomy yields comparable stability to lateral open wedge procedure on the distal femur.

Supracondylar osteotomies are a frequently and successfully used technique in the treatment of coronal plane deformities and unicompartmental osteoarthritis of the knee. While lateral open wedge techniques are common for valgus deformities, the data about medial open wedge techniques for varus deformities is sparse. The aim of this study was to compare the biomechanical properties of medial and lateral open wedge osteotomies using a locking Tomofix® plate (DePuy Synthes, Oberdorf, Switzerland). Our hypothesis was that there would be no difference regarding biomechanical outcome parameters between these two groups. Medial and lateral open wedge osteotomies were performed in composite bone model as routine. Each experimental group contained 6 constructs. Standardized osteotomy gaps of ten millimeters were performed and Tomofix® plates were fixed to third generation composite bones. The constructs were subsequently mounted into a servohydraulic testing machine. Axial and torsional loadings were applied as described in previous experimental studies. All specimens were subject to a load to failure mode with the mechanism of failure being noted. Both experimental groups showed comparable biomechanical properties under axial and torsional loadings. Mean high force axial stiffness was 3772 N/mm for lateral and 4185 N/mm for the medial construct. Significant differences were noted for torsional stiffness under low- (0 N) and mid-force (150 N) loadings (P = 0.002; P = 0.009), favoring the medial open wedge constructs. Medial open wedge osteotomy yields comparable biomechanical stability to the lateral open wedge procedure on the distal femur in a composite bone model.

Lateral Open Wedge Osteotomy and Lateral Condyle Fusion In Situ for Children With Condyle Nonunion and Cubitus Valgus Deformity.

Long-term nonunion of the lateral humeral condyle (LHC) can result in progressive cubitus valgus, elbow pain, instability, and delayed ulnar nerve palsy. Various techniques have been proposed for correction, each with its own advantages and disadvantages. The purpose of this study was to introduce a lateral open wedge osteotomy (LOWO) procedure combined with in situ osteosynthesis of nonunited LHC for the treatment of long-term LHC nonunion with cubitus valgus deformity. We evaluated 18 pediatric patients who had a cubitus valgus deformity greater than 10 degrees after nonunion of the LHC for more than 2 years. The LHC was fixed in situ with 1 or 2 cancellous screws, and the LOWO was fixed with a locking plate. All patients underwent clinical and radiologic evaluation, and the pre- and postoperative carrying angle (CA), range of motion (ROM), and Mayo elbow performance score (MEPS) were analyzed. Eighteen patients, with a mean age of 9.9 ± 3.9 years, underwent treatment for LHC nonunion and cubitus valgus deformity after a mean interval of 61.6 ± 24.1 months from the initial injury. The mean follow-up period was 57.6 ± 22.8 months. Union of the LHC and LOWO was achieved in all patients. The mean CA decreased significantly from 31.6 ± 4.8 degrees before surgery to 10.4 ± 2.2 degrees after surgery (P<0.001). Surgery did not decrease elbow range of motion (P=0.202). The mean MEPS increased significantly from a preoperative value of 55 ± 4.9 to a postoperative value of 91.1 ± 5.6 (P<0.001). No significant complications were observed. LOWO combined with in situ fixation of nonunited LHC is an effective approach for treating long-term LHC nonunion associated with cubitus valgus deformity.

Survivorship and Functional Outcomes After Complex Primary Total Knee Arthroplasty With Contemporary Rotating-Hinge Implants

Background: Initial fixed-bearing hinge designs for primary total knee arthroplasty (TKA) had high rates of aseptic loosening. There are limited data on contemporary rotating-hinge implants. Purpose: We sought to determine survivorship and functional outcomes of contemporary rotating-hinge implants used in primary TKA. Methods: Retrospective review identified 54 primary rotating-hinge TKAs implanted in 49 patients from 2014 to 2018 at a single institution. Patients identified were 76% women, the mean body mass index was 29 kg/m2, the mean age was 65 years, and the mean follow-up was 3 years. The primary diagnosis for TKA in all cases was severe instability and ligamentous compromise. Secondary diagnoses included post-traumatic osteoarthritis (11, 20%), neurologic disease (10, 19%), inflammatory arthritis (10, 19%), connective tissue disease (3, 6%), valgus deformity (16, 30%), varus deformity (2, 4%), and recurvatum (2, 4%). Preoperative, postoperative (within 6 weeks), and most recent radiographs were reviewed. In this study, we collected preoperative, 1-year, and 2-year patient-reported outcome measures (PROMs) for patients with primary rotating-hinge TKA. Patient-reported outcome measures were prospectively collected, including the Knee Injury and Osteoarthritis Outcome Survey for Joint Replacement (KOOS JR) scores and the Mental (MCS) and Physical Component Scores (PCS) of the Veterans RAND 12-Item Health Survey (VR-12). Kaplan-Meier analysis was used to determine implant survivorship. Results: Reoperation was required in 6% (3/54); indications included periprosthetic joint infection (1), peripatellar fibrosis (1), and periprosthetic femur fracture (1). At both 2 and 5 years, survivorship free from all-cause reoperation was 95% and from revision for aseptic loosening was 100%. Mean KOOS JR scores increased from 47 preoperatively to 65 at 2 years postoperatively. On radiographic review, there were no progressive radiolucent lines consistent with aseptic loosening at final follow-up. Conclusion: The findings of this single-center, multi-surgeon retrospective case series on the use of rotating-hinge implants for primary TKA suggest excellent 2-year survivorship free from reoperation and no revisions for aseptic loosening. We report modest improvement in a variety of PROMs at 1-year and 2-year follow-up. Despite improvement, clinical outcomes were poor for a primary implant. Longer-term follow-up is required to monitor the durability of primary hinges.

Revision Surgery due to Patient Dissatisfaction with Remaining Valgus leg Alignment after Kinematically Aligned Total Knee Arthroplasty: A Case Report

BACKGROUND: The kinematic alignment (KA) technique aims to achieve true resurfacing of the knee joint and recreate prearthritic anatomy while preserving soft tissues. However, it remains uncertain whether all prearthritic anatomies are biomechanically equivalent and if KA is suitable for cases with extreme anatomical variations. CASE PRESENTATION: The case of a 75-year-old female patient with a moderate valgus deformity who underwent kinematically aligned total knee arthroplasty (TKA) was reported. The patient required early revision surgery due to persistent pain in the medial collateral ligament area and dissatisfaction with the postoperative leg alignment. CONCLUSION: There is a paucity of studies addressing the outcomes of kinematically aligned TKA in patients with valgus knees. Concerns persist regarding the suitability of unrestricted KA for all anatomical variations, particularly extreme ones. This case underscores the importance of considering restricted KA as a potentially safer alternative. In addition, patient perception of limb alignment and appearance significantly impacts the success of total knee arthroplasty, particularly in cases with valgus deformities.

Dynamic tightrope fixation for the correction of the 1,2 intermetatarsal angle in hallux valgus surgery

Introduction Hallux valgus is a common foot deformity that causes forefoot widening, difficulty fitting shoes, bunion pain, and transfer metatarsalgia. Studies have shown that correcting the 1,2 intermetatarsal angle (IMA) can significantly reduce forefoot width and improve symptoms. This study aims to review the radiological and functional outcomes of hallux valgus reconstruction with IMA closure using mini-tightrope suture buttons. Methods A case series of 52 consecutive patients who underwent minimally invasive surgical reconstruction of hallux valgus deformity utilising the dynamic tightrope fixation was included. All patients had &gt;1 year follow-up with interim assessments at baseline, 3 months, 6 months, and 1 year. Primary outcomes included IMA in weight-bearing feet X-rays, and secondary outcomes included the hallux valgus angle (HVA) and clinical function via the Foot and Ankle Outcome Score. Results Based on radiological analysis, the 1,2 IMA and the HVA significantly improved. Clinical function also showed significant improvement in symptoms, pain, activities of daily living, and quality of life subsection. No major intra-operative complications occurred in this series; however, ∼5% of the patients required revision surgery due to a recurrence of the hallux valgus or overcorrection into hallux varus. Conclusion Dynamic tightrope fixation is a simple surgical technique that effectively corrects the 1,2 IMA during hallux valgus surgery.