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Browsing by Author "Wagner, Emilio"

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Achilles insertional tendinopathy: state of the art
(2019) Maffulli, Nicola; Saxena, Amol; Wagner, Emilio; Torre, Guglielmo
Achilles tendon pathology is a most common musculoskeletal condition in active individuals and athletes. Almost 6% of the general population will suffer from such ailment in their lifetime. Insertional Achilles tendinopathy (IAT) differs in its physiopathology, clinical features and treatment from midportion tendinopathy. The literature has mainly focused on assessment, outcome evaluation and treatment of IAT, although differences in management according to different geographical regions have not been addressed. The principles of clinical evaluation and imaging assessment of IAT are well established, with a major role of clinical assessment and soft tissue imaging, including ultrasonography and MRI. Conservative management options include eccentric training, extracorporeal shockwave therapy and prolotherapy, or a combination of these modalities. Recently, regenerative medicine has been more widely used, with at times dubious results. Surgery is advocated where conservative treatment is not beneficial within 6 months. Surgery includes more or less extensive debridement of peritendinous bony and soft tissue structures. To improve our knowledge about IAT, more evidence should be provided concerning innovative treatments, especially considering growth factors injections and percutaneous surgery.
Achilles tendoscopy for non insertional achilles tendinopathy. A preliminary study
(2019) Wagner, Pablo; Wagner, Emilio; Ortiz, C.; Zanolli, Diego; Keller, A.; Maffulli, N.
Background: To report the mid-term clinical results of endoscopic assisted surgery for patients suffering from chronic recalcitrant painful mid-portion Achilles tendinopathy who failed conservative management for at least 6 months. Methods: Descriptive and retrospective case series. Consecutive series of 11 patients, 6 men and 5 women, with a median age of 54 (range 40 – 67) years; 13 Achilles tendons with chronic recalcitrant painful mid-portion tendinopathy treated with tendinoscopy were included. Median follow-up of 87 (27-105) months. We report the symptoms duration, regular sports activity, treatment before surgery, complications and satisfaction after surgery, return to previous sport level, and postoperative VISA-A score. No tendon excision or transfer was performed at the time of surgery. All patients completed at least 20 sessions of supervised physical therapy and did not undertake impact sport activities for 6 months before surgery. Results: No postoperative complications were reported. Complete satisfaction was obtained in 10 out of 11 patients. The median postoperative VISA-A score was 100 (30-100) points. Conclusions: The mid-term results in patients with chronic painful mid-portion Achilles tendinopathy undergoing endoscopic debridement are satisfactory. Level of Evidence: IV.
"Angle to Be Corrected" in Preoperative Evaluation for Hallux Valgus Surgery: Analysis of a New Angular Measurement.
(Sage, 2016) Ortiz, Cristián; Wagner, Pablo; Vela, Omar; Fischman, Daniel; Cavada, Gabriel; Wagner, Emilio
BACKGROUND: The most common methods for assessing severity of hallux valgus deformity and the effects of an operative procedure are the angular measurements in weightbearing radiographs, specifically the hallux valgus angle and intermetatarsal angle (IMA). Our objective was to analyze the interobserver variability in hallux valgus patients of a new angle called the "angle to be corrected" (ATC), and to compare its capacity to differentiate between different deformities against IMA. METHODS: We included 28 symptomatic hallux valgus patients with 48 weightbearing foot x-rays. Three trained observers measured the 1 to 2 IMA and the ATC. We then identified retrospectively 45 hallux valgus patients, which were divided into 3 operative technique groups having used the ATC as reference, and analyzed the capacity of the IMA to differentiate between them. RESULTS: The IMA average value was 13.6 degrees, and there was a significant difference between observer 3 and observer 1 (P = .001). The average value for the ATC was 8.9 degrees, and there was no difference between observers. Both angles showed a high intraclass correlation. Regarding the capacity to differentiate between operative technique groups, the ATC was different between the 3 operative technique groups analyzed, but the IMA showed differences only between 2. CONCLUSIONS: The ATC was at least as reliable as the intermetatarsal angle for hallux valgus angular measurements, showing a high intraclass correlation with no interobserver difference. It can be suggested that the ATC was better than the IMA to stratify hallux valgus patients when deciding between different operative treatments.
AOFAS Position Statement Regarding Patient-Reported Outcome Measures
(2018) Kitaoka, Harold B.; Meeker, James E.; Phisitkul, Phinit; Adams Jr., Samuel B.; Kaplan, Jonathan R.; Wagner, Emilio
Outcome measures evaluate various aspects of patient health, and when appropriately utilized can provide valuable information in both clinical practice and research settings. The orthopedic community has placed increasing emphasis on patient-reported outcome measures, recognizing their value for understanding patients’ perspectives of treatment outcomes. Patient-reported outcomes are information directly reported by patients regarding their perceptions of health, quality of life, or functional status without interpretation by healthcare providers. The American Orthopaedic Foot & Ankle Society (AOFAS) supports the use of validated patient-reported outcome (PRO) instruments to assess patient general health, functional status, and outcomes of treatment. It is not possible to recommend a single instrument to collect quality orthopedic data as the selection is dependent on the population being examined and the question being asked. We support the use of the PROMIS Physical Function Computerized Adaptive Test (PF CAT) or Lower Extremity Computerized Adaptive Test (LE CAT), which can be assessed with other domains such as Pain Interference. In addition, a disease-specific measure can be used when available.
Biomechanical Cadaveric Evaluation of Partial Acute Peroneal Tendon Tears
(2018) Wagner, Emilio; Wagner, Pablo; Ortiz, Cristian; Radkievich, Rubén; Palma, Felipe; Guzmán-Venegas, Rodrigo
Background: No clear guideline or solid evidence exists for peroneal tendon tears to determine when to repair, resect, or perform a tenodesis on the damaged tendon. The objective of this study was to analyze the mechanical behavior of cadaveric peroneal tendons artificially damaged and tested in a cyclic and failure mode. The hypothesis was that no failure would be observed in the cyclic phase. Methods: Eight cadaveric long leg specimens were tested on a specially designed frame. A longitudinal full thickness tendon defect was created, 3 cm in length, behind the tip of the fibula, compromising 66% of the visible width of the peroneal tendons. Cyclic testing was initially performed between 50 and 200 N, followed by a load-to-failure test. Tendon elongation and load to rupture were measured. Results: No tendon failed or lengthened during cyclic testing. The mean load to failure for peroneus brevis was 416 N (95% confidence interval, 351–481 N) and for the peroneus longus was 723 N (95% confidence interval, 578–868 N). All failures were at the level of the defect created. Conclusion: In a cadaveric model of peroneal tendon tears, 33% of remaining peroneal tendon could resist high tensile forces, above the physiologic threshold. Clinical Relevance: Some peroneal tendon tears can be treated conservatively without risking spontaneous ruptures. When surgically treating a symptomatic peroneal tendon tear, increased efforts may be undertaken to repair tears previously considered irreparable.
Biomechanical Cadaveric Evaluation of the Role of Medial Column Instability in Hallux Valgus Deformity
(2022) Wagner, Emilio; Wagner, Pablo; Pacheco, Florencia; López, Mario; Palma, Felipe; Guzmán, Rodrigo; Berral, Francisco
Background: Medial column instability is a frequent finding in patients with flatfeet and hallux valgus, within others. The etiology of hallux valgus is multifactorial, and medial ray axial rotation has been mentioned as having an individual role. Our objective was to design a novel cadaveric foot model where we could re-create through progressive medial column ligament damage some components of a hallux valgus deformity. Methods: Ten fresh-frozen lower leg specimens were used, and fluorescent markers were attached in a multisegment foot model. Constant axial load and cyclic tibial rotation (to simulate foot pronation) were applied, including pull on the flexor hallucis longus tendon (FHL). We first damaged the intercuneiform (C1-C2) ligaments, second the naviculocuneiform (NC) ligaments, and third the first tarsometatarsal ligaments, leaving the plantar ligaments unharmed. Bony axial and coronal alignment was measured after each ligament damage. Statistical analysis was performed. Results: A significant increase in pronation of multiple segments was observed after sectioning the NC ligaments. Damaging the tarsometatarsal ligament generated small supination and varus changes mainly in the medial ray. No significant change was observed in axial or frontal plane alignment after damaging the C1-C2 ligaments. The FHL pull exerted a small valgus change in segments of the first ray. Discussion: In this biomechanical cadaveric model, the naviculocuneiform joint was the most important one responsible for pronation of the medial column. Bone pronation occurs along the whole medial column, not isolated to a certain joint. Flexor hallucis longus pull appears to play some role in frontal plane alignment, but not in bone rotation. This model will be of great help to further study medial column instability as one of the factors influencing medial column pronation and its relevance in pathologies like hallux valgus. Clinical relevance: This cadaveric model suggests a possible influence of medial column instability in first metatarsal pronation. With a thorough understanding of a condition's origin, better treatment strategies can be developed.
Biomechanical Evaluation of Circumtibial and Transmembranous Routes for Posterior Tibial Tendon Transfer for Dropfoot
(2018) Wagner, Emilio; Wagner, Pablo; Zanolli, Diego; Radkievich, Rubén; Redenz, Gunther; Guzmán, Rodrigo
Background: Tibialis posterior tendon transfer is performed when loss of dorsiflexion has to be compensated. We evaluated the circumtibial (CT), above-retinaculum transmembranous (TMAR), and under-retinaculum transmembranous (TMUR) transfer gliding resistance and foot kinematics in a cadaveric foot model during ankle range of motion (ROM). Methods: Eight cadaveric foot-ankle distal tibia specimens were dissected free of soft tissues on the proximal end, applying an equivalent force to 50% of the stance phase to every tendon, except for the Achilles tendon. Dorsiflexion was tested with all of the tibialis posterior tendon transfer methods (CT, TMAR, and TMUR) using a tension tensile machine. A 10-repetition cycle of dorsiflexion and plantarflexion was performed for each transfer. Foot motion and the force needed to achieve dorsiflexion were recorded. Results: The CT transfer showed the highest gliding resistance (P < .01). Regarding kinematics, all transfers decreased ankle ROM, with the CT transfer being the condition with less dorsiflexion compared with the control group (6.8 vs 15 degrees, P < .05). TMUR transfer did perform better than TMAR with regard to ankle dorsiflexion, but no difference was shown in gliding resistance. The CT produced a supination moment on the forefoot. Conclusion: The CT transfer had the highest tendon gliding resistance, achieved less dorsiflexion and had a supination moment. Clinical Relevance We suggest that the transmembranous tibialis posterior tendon transfer should be the transfer of choice. The potential bowstringing effect when performing a tibialis posterior tendon transfer subcutaneously (TMAR) could be avoided if the transfer is routed under the retinaculum, without significant compromise of the final function and even with a possible better ankle range of motion.
Biomechanical evaluation of various suture configurations in side-to-side tenorrhaphy.
(Lippincott Williams & Wilkins, 2014) Wagner, Emilio; Ortiz, Cristián; Wagner, Pablo; Guzman, Rodrigo; Ahumada, Ximena; Maffulli, Nicola
BACKGROUND: Side-to-side tenorrhaphy is increasingly used, but its mechanical performance has not been studied. METHODS: Two porcine flexor digitorum tendon segments of equal length (8 cm) and thickness (1 cm) were placed side by side. Eight tenorrhaphies (involving sixteen tendons) were performed with each of four suture techniques (running locked, simple eight, vertical mattress, and pulley suture). The resulting constructs underwent cyclic loading on a tensile testing machine, followed by monotonically increasing tensile load if failure during cyclic loading did not occur. Clamps secured the tendons on each side of the repair, and specimens were mounted vertically. Cyclic loading varied between 15 N and 35 N, with a distension rate of 1 mm/sec. Cyclic loading strength was determined by applying a force of 70 N. The cause of failure and tendon distension during loading were recorded. RESULTS: All failures occurred in the monotonic loading phase and resulted from tendon stripping. No suture or knot failure was observed. The mean loads resisted by the configurations ranged from 138 to 398 N. The mean load to failure, maximum load resisted prior to 1 cm of distension, and load resisted at 1 cm of distension were significantly lower for the vertical mattress suture group than for any of the other three groups (p < 0.031). CONCLUSIONS: All four groups sustained loads well above the physiologic loads expected to occur in tendons in the foot and ankle (e.g., in tendon transfer for tibialis posterior tendon insufficiency). None of the four side-to-side configurations distended appreciably during the cyclic loading phase. The vertical mattress suture configuration appeared to be weaker than the other configurations. CLINICAL RELEVANCE: For surgeons who advocate immediate loading or motion of a side-to-side tendon repair, a pulley, running locked, or simple eight suture technique appears to provide a larger safety margin compared with a vertical mattress suture technique.
Comparison of Suture-Augmented Ligamentplasty to Transarticular Screws in a Lisfranc Cadaveric Model
(2020) Nery, Caio; Baumfeld, Daniel; Baumfeld, Tiago; Prado, Marcelo; Giza, Eric; Wagner, Pablo; Wagner, Emilio
Background: Lisfranc injuries represent a spectrum of trauma from high-energy lesions, with significant instability of the midfoot, to low-energy lesions, with subtle subluxations or instability without gross displacement. Recently, treatment options that allow for physiologic fixation of this multiplanar joint are being evaluated. The purpose of this study was to analyze the stability of a cadaveric Lisfranc injury model fixed with a novel suture-augmented neoligamentplasty in comparison with a traditional transarticular screw fixation construct. Methods: Twenty-four fresh-frozen, matched cadaveric leg and foot specimens (12 individuals younger than 65 years of age) were used for this study. Two different types of Lisfranc ligament injuries were tested: partial and complete. Two different methods of fixation were compared: transarticular screws and augmented suture ligamentplasty with FiberTape. Specimens were fixed to a rotation platform in order to stress the joints while applying 400 N of axial load and internal and external rotation. Six distances were measured and compared between the intact, injured, and fixed states with a 3D Digitizer arm, in order to evaluate the stability between them. Analysis of variance was used with P < .05 considered significant. Results: Using distribution graphs and analyzing the grouped data, it was observed that there was no difference between the 2 stabilization methods, but the augmented suture ligamentplasty presented lower variability and observed distance shortenings were more likely to be around the mean. The variability of the stabilization with screws was 2.9 times higher than that with tape (P < .001). Conclusion: We suggest that augmented suture ligamentplasty can achieve similar stability to classic transarticular screws, with less variability. Clinical relevance: This cadaveric study adds new information on the debate about Lisfranc lesions treatment. Flexible fixations, such as the synthethic ligamentplasty used, can restore good stability such as conventional transarticular screws.
Correction of Sagittal Plane Deformity of the Distal Tibia
(2022) Wagner, Emilio; Wagner, Pablo
Distal tibia sagittal plane deformities are a frequent finding in tibial malunions (antecurvatum or recurvatum) or ankle posttraumatic arthritis (anterior or posterior ankle arthritis). They should be evaluated in all deformities using long leg and tibia radiographs. Measuring the anterior distal tibia angle is necessary to evaluate the deformity severity. To evaluate the magnitude of secondary talar anterior or posterior displacement, the tibial axis to talus ratio and/or the talar lateral process position relative to the tibia axis should be measured. Anterior closing or opening wedge osteotomies are the recommended treatment options for posterior ankle arthritis or anterior ankle arthritis, respectively.
Cost effectiveness of different techniques in hallux valgus surgery.
(Elsevier, 2016) Wagner, Emilio; Ortiz, Cristián; Torres, Karen; Contesse, Ivan; Vela, Omar; Zanoll, Diego
BACKGROUND: Different surgical techniques are available to correct each type of Hallux Valgus (HV) deformity, and all present similar good results. No information is available relative to the cost of each technique compared to their individual success. OBJECTIVE: To determine the cost-effectiveness-ratio (CER) of five different techniques for HV. METHODS: We included 245HV surgeries performed in 179 patients. The severity was defined according to radiological parameters. For mild to moderate HV we included the Chevron, Modified-Scarf and Ludloff techniques; for severe HV: either Poscow-osteotomy or Lapidus-arthrodesis fixed with plates or screws. Weighted costs were estimated. CER was expressed in $US dollars per AOFAS-point. RESULTS: The lowest weighted cost was observed for the Chevron-group, and the highest weighted cost was observed in the Poscow-osteotomy and Lapidus-arthrodesis fixed with plate groups. The AOFAS-score improvement was higher in the Chevron and Modified-Scarf groups. The CER found for Chevron and Modified-Scarf techniques were significantly less than for Poscow and Lapidus-techniques. CONCLUSION: Cost-Effectiveness-Ratio was lower, and therefore better, in the groups with mild to moderate deformities operated with Chevron or Modified-Scarf techniques. In severe HV, the three techniques investigated presented similar CER. CER analysis is an additional factor that can be included in the decision making analysis in hallux valgus surgery. Level of Evidence Level IV, Retrospective Study.
Current Concepts in Treatment of Ligament Incompetence in the Acquired Flatfoot
(2021) Wagner, Emilio; Wagner, Pablo
Flatfoot deformity consists of a loss of medial arch, hindfoot valgus, and forefoot abduction. Historically considered a posterior tendon insufficiency, multiple ligament damage and subsequent incompetence explain the different clinical presentations with varying degrees of deformity. When surgery is deemed necessary, depending on the apex of the deformity, skeletal and soft tissue procedures are considered to keep motion and restore function. Osteotomies are considered at every level where an apex of deformity is found. The recently designated tibiocalcaneonavicular ligament comprises the older superficial and deep deltoid and spring ligaments; its repair or reconstruction should be considered in most flatfoot cases.
Early weight-bearing after percutaneous reduction and screw fixation for low-energy lisfranc injury
(Sage Publications, 2013) Wagner, Emilio; Ortiz, Cristián; Villalón, Ignacio; Keller, Andrés; Wagner, Pablo
BACKGROUND: Anatomic restoration and postoperative rehabilitation of displaced fracture-dislocations of the tarsometatarsal junction of the foot are essential. Our objective was to report percutaneous reduction and screw fixation results in low-energy Lisfranc fracture dislocation injuries that were treated with early weight-bearing and rehabilitation. METHODS: We retrospectively evaluated patients with low-energy Lisfranc injuries who underwent surgery between May 2007 and April 2011. The study reviewed 22 patients (12 men and 10 women) with an average age of 36.2 years (range, 16-50 years) and an average follow-up of 33.2 months (range, 12-50 months). We report the mechanism of trauma; quality of reduction in the postoperative digital radiographs; subjective satisfaction; AOFAS score; time required to return to work, recreational activities, and low-impact sports; and complications. Postoperatively, all of the patients were instructed to be non-weight-bearing for 3 weeks, and the stitches were removed after 2 weeks. At the third postoperative week, the patients were encouraged to bear weight as tolerated. RESULTS: Quality of reduction was anatomic or near anatomic in 100% of cases. The subjective satisfaction reported by patients was very good, with complete satisfaction in 20 of them (90.9%). The AOFAS average was 94 points (range, 90-100 points). Average return to work was at 7 weeks (range, 6-9 weeks), recreational activities 7.2 weeks (range, 6-9 weeks), training for low-impact sports 7.6 weeks (range, 7-8 weeks), and symptom-free sport activities 12.4 weeks (range, 11-13 weeks). CONCLUSION: In this selected group of patients with low-energy Lisfranc fracture dislocation, anatomic or near-anatomic reduction can be achieved with percutaneous reduction and screw fixation. Early weight-bearing is possible in these patients, and early return to regular activities and low-impact sport can be expected. LEVEL OF EVIDENCE: Level IV, retrospective case series.
Evidence-Based Treatment Algorithm for Freiberg Disease
(2023) Yoshimura, Ichiro; Takao, Masato; Wagner, Emilio; Stufkens, Sjoerd; Dahmen, Jari; Kerkhoffs, Gino M. M. J.; Glazebrook, Mark
Freiberg disease is a type of osteonecrosis of the metatarsal head that predominantly occurs in young females and adolescents, although it may occur at any age. The pathophysiology is multifactorial and may involve trauma, altered foot biomechanics, systemic disorders, and arterial insufficiency. The most typical location is the second metatarsal head, but Freiberg disease may also occur in other lesser toes. Nonoperative treatment is best applied in the early stage of the disease; if this is ineffective, surgical treatment is recommended. Currently available surgical procedures include debridement, osteotomy, osteochondral grafting, microfracture, interposition arthroplasty, implant arthroplasty, and metatarsal shortening arthroplasty. In this article, we propose a treatment algorithm for Freiberg disease based on the current literature and expert opinion.
Hallux Varus and Plantar Plate Repair
(Lippincott Williams & Wilkins, 2017) Ortiz, Cristián; Wagner, Emilio
One of the most frequent problems encountered in foot and ankle are hallux valgus and lesser toes deformities. One of the complications after hallux valgus treatment is a iatrogenic hallux varus. This deformity can be solved at 2 levels, namely the skeletal level, through a metatarsal osteotomy to correct the varus component of the bone and at the soft tissue level, to compensate and rebalance soft tissue tension surrounding the metatarsophalangeal (MTP) joint. The soft tissue reconstruction may include capsular releases, capsulorraphies, tendon transfers, and augmentations such as nonreabsorbable suture reinforcement of some MTP capsular components. Lesser toe deformities have historically shown moderate to low levels of satisfaction after surgical treatment. Ten years ago the MTP component of lesser toes deformity was solved with some type of metatarsal shortening osteotomy and soft tissue release, specially including dorsal structures over the metatarsal head. Over the last few years’ knowledge from a series of articles have shown the importance in recognizing and repairing the MTP plate to regain stability and alignment at the joint. Different alternatives of repair exist at this level, and some of them are discussed in this article. Level of Evidence: Diagnostic Level 5. See Instructions for Authors for a complete description of levels of evidence.
Interosseous membrane window size for tibialis posterior tendon transfer—Geometrical and MRI analysis
(Elsevier, 2016) Wagner, Pablo; Ortiz, Cristián; Vela, Omar; Arias, Paul; Zanolli, Diego; Wagner, Emilio
BACKGROUND: Tibialis posterior (TP) tendon transfer through the interosseous membrane is commonly performed in Charcot-Marie-Tooth disease. In order to avoid entrapment of this tendon, no clear recommendation relative to the interosseous membrane (IOM) incision size has been made. OBJECTIVE: Analyze the TP size at the transfer level and therefore determine the most adequate IOM window size to avoid muscle entrapment. METHODS: Eleven lower extremity magnetic resonances were analyzed. TP muscle measurements were made in axial views, obtaining the medial-lateral and antero-posterior diameter at various distances from the medial malleolus tip. The distance from the posterior to anterior compartment was also measured. These measurements were applied to a mathematical model to predict the IOM window size necessary to allow an ample TP passage in an oblique direction. RESULTS: The average tendon diameter (confidence-interval) at 15cm proximal to the medial malleolus tip was 19.47mm (17.47-21.48). The deep posterior compartment to anterior compartment distance was 10.97mm (9.03-12.90). Using a mathematical model, the estimated IOM window size ranges from 4.2 to 4.9cm. CONCLUSION: The IOM window size is of utmost importance in trans-membrane TP transfers, given that if equal or smaller than the transposed tendon oblique diameter, a high entrapment risk exists. A membrane window of 5cm or 2.5 times the size of the tendon diameter should be performed in order to theoretically diminish this complication.
Lesser metatarsal complications after MIS surgery
(Lippincott Williams & Wilkins, 2017) Khazen, Gabriel; Wagner, Pablo; Wagner, Emilio
Minimally invasive surgery (MIS) for lesser metatarsals is performed through percutaneous incisions, with minimal scar formation. Nevertheless, MIS can have significant complications that may result in poor outcomes, forefoot pain, and metatarsalgia requiring further complex open revision surgery. These complications occur after inappropriate or poor surgical technique, lack of surgeon’s experience, and poor patient selection. The most frequent complication is metatarsalgia that occurs secondary to metatarsal malunion or nonunion. MIS is a technique that has to be carefully chosen for specific morbidities and performed only under experienced hands. Level of Evidence: Diagnostic Level 5. See Instructions for Authors for a complete description of levels of evidence.
Lesser Toes Proximal Interphalangeal Joint Fusion in Rigid Claw Toes
(Elsevier, 2012) Fernández, Sergio; Wagner, Emilio; Ortiz, Cristián
Treatment of rigid claw toe is still subject to discussion and evolution. Arthrodesis or arthroplasty of the PIPJ is apparently the most reliable procedure. K wire seems be the most reliable way to solve this clinical issue, but different implants specifically created to treat PIPJ deformities are being developed, and still have to be tested clinically. The use of screws to fix the PIPJ is a valid alternative, although some problems remain to be solved, specifically pain in relation to the tip of the screw. Longer follow-up studies are needed to increase our knowledge of the treatment of this specific deformity.
Metatarsal Pronation in Hallux Valgus Deformity: A Review
(2020) Wagner, Emilio; Wagner, Pablo
Hallux valgus deformity is a multiplanar deformity, where the rotational component has been recognized over the past 5 to 10 years and given considerable importance. Years ago, a rounded shape of the lateral edge of the first metatarsal head was identified as an important factor to detect after surgery because a less rounded metatarsal head was associated to less recurrence. More recently, pronation of the metatarsal bone was identified as the cause for the rounded appearance of the metatarsal head, and therefore, supination stress was found to be useful to achieve a better correction of the deformity. Using CT scans, up to 87% of hallux valgus cases have been shown to present with a pronated metatarsal bone, which highlights the multiplanar nature of the deformity. This pronation explained the perceived shape of the metatarsal bone and the malposition of the medial sesamoid bone in radiological studies, which has been associated as one of the most important factors for recurrence after treatment. Treatment options are discussed briefly, including metatarsal osteotomies and tarsometatarsal arthrodesis.
Percutaneus repair in acute Achilles tendon rupture. Our experience in Chile
(Andrés Keller, Pablo Mococain, Emilio Wagner, Pablo Wagner, Diego Zanolli, Percutaneus repair in acute Achilles tendon rupture. Our experience in Chile,Fuß & Sprunggelenk, Volume 17, Issue 4, 2019, Pages 204-209,ISSN 1619-9987, https://doi.org/10.1016/j.fuspru.2019.10.001, 2019) Keller, Andrés; Wagner, Emilio; Wagner, Pablo; Zanolli, Diego; Clínica Alemana de Santiago, Universidad del Desarrollo de Santiago; Mococain, Pablo
Background. There is still no consensus in the literature regarding the ideal treatment of acute Achilles tendon ruptures. Materials & Methods. We conducted a selective literature review and analyzed our own results. Results. Open surgery offers good functional results, but presents high rates of surgical wound complications. Conservative treatment is also described as a good option, but rerupture rates are significantly higher than with surgical treatment. On the other hand, percutaneous treatment offers great functional outcomes with minimal soft tissue damage, making it for us our treatment of choice in this type of injury. Outlook. In Chile, we have been developing some modifications to the original technique described by the Dresden Group in order to increase tensile forces of the repair and offer our patients a quicker and safer recovery.

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