Life-threatening complication: the development of necrotising fasciitis in a preterm neonate with omphalitis.

Omphalitis is a mild medical condition that can turn severe in exceptional situations leading to necrotising fasciitis. The most common cause of omphalitis is umbilical vein catheterisation (UVC) where the cleanliness measures can be compromised. The treatment options for omphalitis include antibiotics, debridement and supportive care. Sadly, the fatality rate in such cases is high. This report is about a premature female baby who was admitted to a neonatal intensive care unit after her birth at 34 weeks of gestation. UVC was performed on her which led to abnormal changes in the skin around her umbilicus. Further tests revealed that she had omphalitis and was treated with antibiotics and supportive care. Unfortunately, her condition quickly worsened and she was diagnosed with necrotising fasciitis which ultimately resulted in her death. This report provides details about the patient's symptoms, course of illness and treatment for necrotising fasciitis.

Comparison of antibiotic-impregnated bone cement coverage versus vacuum sealing drainage in semi-open bone grafting using for tibial fracture with infected bone and soft tissue defect: a retrospective analysis.

OBJECTIVE: To compare antibiotic-impregnated bone cement coverage (bone cement surface technique; BCS-T) versus vacuum sealing drainage (VSD) for tibial fracture with infected bone and soft tissue defect. METHOD: This retrospective analysis compared the clinical outcomes in patients undergoing BCS-T (n = 16) versus VSD (n = 15) for tibial fracture with infected bone and soft tissue defect at the Third Hospital of Hebei Medical University from March 2014 to August 2019. For BCS-T group, osseous cavity was filled with autograft bone graft after debridement, and then the wound was covered with a 3-mm layer of bone cement impregnated with vancomycin and gentamycin. The dressing was changed every day in the first week, and every 2 ~ 3 days in the second week. For VSD group, a negative pressure of -150 ~ -350 mmHg was maintained, and the dressing was changed every 5-7 days. All patients received antibiotics treatment based on bacterial culture results for 2 weeks. RESULTS: The 2 groups did not differ in age, sex and key baseline characteristics, including type of Gustilo-Anderson classification, size of the bone and soft tissue defect, the percentage of primary debridement, bone transport, and the time from injury to bone grafting. The median follow-up was 18.9 months (range:12-40). The time to complete coverage of bone graft by granulation tissue was 21.2 (15.0-44.0) and 20.3 (15.0-24.0) days in the BCS-T and VSD groups, respectively (p = 0.412). The 2 groups also did not differ in wound healing time (3.3 (1.5-5.5) versus 3.2(1.5-6.5) months; p = 0.229) and bone defect healing time (5.4(3.0-9.6) versus 5.9(3.2-11.5) months; p = 0.402). However, the cost of covering material was significantly reduced in the BCS-T group (2071 ± 134 versus 5542 ± 905 yuan; p = 0.026). Paley functional classification at 12 months did not differ between the 2 groups (excellent in 87.5% versus 93.3% in the 2 groups; p = 0.306). CONCLUSION: BCS-T could achieve clinical outcomes similar to VSD in patients receiving bone graft for tibial fracture with infected bone and soft tissue defect, but material cost was significantly reduced. Randomized controlled trials are needed to verify our finding.

[Surgical Treatment of Tuberculous Spondylodiscitis]. / Operacní lécba tuberkulózní spondylodiscitidy.

PURPOSE OF THE STUDY The paper presents a monocentric retrospective study of patients treated surgically for spinal tuberculosis. Clinical and radiological results are analysed, early and late complications are recorded. The study aims to answer the following questions. 1. Can we use instrumentation to restore the stability and alignment in the infected spinal focus? 2. Should we always perform radical anterior resection of TBC lesions? 3. What is the prognosis of surgical treatment of TBC patients with neurological deficit manifestation? MATERIAL AND METHODS Between 2010 and 2020, a total of 12 patients were treated for spinal tuberculosis at our department, of whom 9 patients (5 men, 4 women) with the mean age of 47.3 years (range 29 to 83 years) underwent a surgery. A total of three patients were operated on before the final confirmation of the TBC and treatment with antituberculosis medication, four patients in the initial therapy phase and two patients in the continuous phase. Two patients only underwent a non-instrumented decompression surgery followed by external support fixation. In the other seven patients, always with spinal deformity, instrumentation was used (3 cases of isolated posterior decompression, transpedicular fixation, posterior fusion, 4 cases of anteroposterior instrumented reconstruction). In 2 cases a structural bone graft and in 2 cases an expandable titanium cage were used for anterior column reconstruction. RESULTS Of the total number of patients, altogether eight patients were assessed at 1 year after surgery (one 83-year-old patient died from heart failure 4 months after surgery). Of the remaining eight patients, three patients exhibited a neurological deficit and postoperative regression of the finding. The McCormick score improved from the preoperative mean score of 3.25 to 1.62 at 1 year after surgery (p < 0.001). The clinical VAS score regressed from 5.75 to 1.63 at 1 year after surgery (p < 0.001). Radiographic healing of the anterior fusion was achieved in all patients, both after decompression and instrumented surgery. The initial mean kyphosis of 20.36 degrees of the operated segment measured by the mCobb angle was corrected to 14.6 degrees postoperatively, with a subsequent slight deterioration to 14.86 degrees (p < 0.05). The greatest correction was achieved in patients who had undergone a two-stage surgery with anterior resection and AP reconstruction. DISCUSSION In our cohort, titanium instrumentation was used in seven of nine patients. One patient only manifested persistent tuberculosis with nonspecific bacterial flora superinfection. Revision surgery with anterior radical debridement and subsequent treatment with antituberculotic drugs healed the patient. There were four patients with major preoperative neurological deficit persisting more than 2 weeks before the final treatment with subsequent improvement in all cases. These patients were treated with anteroposterior reconstruction and anterior radical debridement. CONCLUSIONS No increased risk of recurrent infection associated with the use of spinal instrumentation was found in the study. Anterior radical debridement is performed in patients with manifested kyphotic deformity and spinal canal compression, followed by reconstruction with a structural bone graft or a titanium cage. The other patients are treated based on the principle of "optimal" debridement with or without the use of transpedicular instrumentation. If adequate spinal canal decompression and stability are achieved, neurological improvement can be anticipated even in case of a major neurological deficit. Key words: spine tuberculosis, tuberculous spondylitis, Pott's disease, anterior debridement, spine instrumentation.

Early postoperative laboratory parameters are predictive of initial treatment failure in acute septic arthritis of the knee and shoulder joint.

Septic arthritis is an orthopedic emergency potentially causing irreversible joint damage. However, the predictive value of potential risk factors such as early postoperative laboratory parameters remains uncertain. We investigated risk factors for initial surgical treatment failure using data from 249 patients (194 knees, 55 shoulders) treated for acute septic arthritis between 2003 and 2018. Necessity for further surgical intervention was defined as primary outcome. Demographic data, medical history, initial and postoperative laboratory parameters, Charlson Comorbidity Index (CCI), and Kellgren and Lawrence classification were collected. Two scoring systems were developed as tools for failure risk estimation after initial surgical irrigation and debridement. More than one intervention was necessary in 26.1% of cases. Treatment failure occurred significantly more often for those with longer symptom duration (p = 0.003), higher CCI grades (p = 0.027), Kellgren-Lawrence grade IV (p = 0.013), shoulder arthroscopy (p = 0.010), positive bacterial culture results (p < 0.001), slow postoperative CRP decline until day three (p = 0.032) and five (p = 0.015), reduced WBC-decline (p = 0.008), and lower hemoglobin (p < 0.001). Scores for third and fifth postoperative day achieved AUCs of 0.80 and 0.85, respectively. This study identified risk factors for treatment failure in patients with septic arthritis, suggesting that early postoperative laboratory parameters can guide further treatment.

Treatment algorithm for post sternotomy wound infection - our experience.

INTRODUCTION: Median sternotomy is the most commonly used approach in open cardiac surgery. As in any other surgery, surgical site infections are a known phenomenon, but morbidity depends on the depth of infection. Superficial wound infections can be managed conservatively; however, deep sternal wound infections need an aggressive approach to prevent disastrous consequence like mediastinitis. Hence, this study was conducted with the aim to classify sternotomy wound infection and to develop a treatment algorithm for superficial and deep sternotomy wound infections. MATERIAL AND METHODS: Between January 2016 to August 2021, 25 patients who had sternotomy wound infections were studied. These wound infections were classified as superficial or deep sternal wound infections. RESULTS: Superficial wound infections underwent treatment with diluted vinegar dressings and deep infections underwent treatment with bilateral pectoralis major muscle advancement flaps. Patients were followed up till the wounds healed completely without complications. Patient characteristics, comorbidities, duration of treatment and outcomes of treatment were analyzed. Superficial sternal wound infection patients responded favorably to diluted vinegar dressings and deep sternal wound infection patients to pectoralis major muscle advancement flaps. Average time duration of healing for superficial and deep wound infections was 66.2 days and 18 days respectively. None of the patients had an increased severity of infection or re-dehiscence following treatment and during follow-up. CONCLUSION: Relatively conservative approach using diluted vinegar (1% acetic acid) dressing for superficial sternal wound infections was efficacious, whereas aggressive debridement and bilateral pectoralis major advancement muscle flaps for deep sternal wound infections are necessary for favorable outcomes. However, more studies are needed to ascertain this treatment algorithm.

Rotation flap closure of pressure injuries following negative pressure wound therapy with instillation for wound cleansing.

INTRODUCTION: Wound cleansing is integral during early-stage wound management and affords the transition to modalities promoting granulation tissue formation and reepithelialization, or preparation for wound coverage/closure. NPWTi-d includes periodic instillation of topical wound cleansing solutions and negative pressure for infectious material removal. MATERIALS AND METHODS: This was a retrospective study of 5 patients who were admitted to an acute care hospital and treated for PI. After initial wound debridement, NPWTi-d instilled normal saline or HOCl solution (40 mL-80 mL) onto the wound for a dwell time of 20 minutes followed by 2 hours of subatmospheric pressure (-125 mm Hg). NPWTi-d duration was 3 to 6 days with 48-hour dressing changes. RESULTS: NPWTi-d helped cleanse 10 PIs in 5 patients (age, 39-89 years) with comorbidities to facilitate primary closure using rotation flaps. In 4 patients, rotation flap closures were performed without immediate postoperative complications, followed by hospital discharge within 72 hours. In one patient, closure was preempted due to an unrelated medical issue. A stoma was created to prevent further contamination. The patient returned for flap coverage post colostomy. CONCLUSION: The findings herein support the use of NPWTi-d in the cleansing of complex wounds and suggest that it may facilitate an expedited transition to rotation flap closure for this wound type.

In vitro studies of factors affecting debridement of dental implants by tricalcium phosphate powder abrasive treatment.

Peri-implantitis is a common complication characterized by inflammation in tissues surrounding dental implants due to plaque accumulation, which can lead to implant failure. While air flow abrasive treatment has been found to be effective for debriding implant surfaces, little is known about the factors that affect its cleaning capacity. This study systematically examined the cleaning capacity of air powder abrasive (APA) treatment with ß-tricalcium phosphate (ß-TCP) powder, using various powder jetting strengths and different particle sizes. Three sizes of ß-TCP powder (S, M, and L) were prepared, and different powder settings (low, medium, and high) were tested. The cleaning capacity was determined by quantifying ink removal, which simulated biofilm removal from the implant surfaces at different time points. The results of the systematic comparisons showed that the most efficient cleaning of implant surfaces was achieved using size M particles with medium setting. Additionally, the amount of powder consumed was found to be critical to cleaning efficiency, and the implant surfaces were altered in all tested groups. These systematically analyzed outcomes may provide insights into the development of potential non-surgical strategies for treating peri-implant diseases.

Application of combined anterior and posterior approaches for the treatment of cervical tuberculosis with anterior cervical abscess formation and kyphosis using a Jackson operating table: a case report and literature review.

BACKGROUND: There have been insufficient reports to date regarding the treatment of cervical spinal tuberculosis, and the optimal surgical approaches to treating this condition have yet to be established. CASE REPORT: This report describes the treatment of a case of tuberculosis associated with a large abscess and pronounced kyphosis through the use of a combined anterior and posterior approach with the aid of the Jackson operating table. This patient did not exhibit any sensorimotor abnormalities of the upper extremities, lower extremities, or trunk, and presented with symmetrical bilateral hyperreflexia of the knee tendons, while being negative for Hoffmann's sign and Babinski's sign. Laboratory test results revealed an erythrocyte sedimentation rate (ESR) of 42.0 mm/h and a C-reactive protein (CRP) of 47.09 mg/L. Acid-fast staining was negative, and spine magnetic resonance imaging revealed the destruction of the C3-C4 vertebral body and a posterior convex deformity of the cervical spine. The patient reported a visual analog pain score (VAS) of 6, and exhibited an Oswestry disability index (ODI) score of 65. Jackson table-assisted anterior and posterior cervical resection decompression was performed to treat this patient, and at 3 months post-surgery the patient's VAS and ODI scores were respectively reduced to 2 and 17. Computed tomography analyses of the cervical spine at this follow-up time point revealed good structural fusion of the autologous iliac bone graft with internal fixation and improvement of the originally observed cervical kyphosis. CONCLUSIONS: This case suggests that Jackson table-assisted anterior-posterior lesion removal and bone graft fusion can safely and effectively treat cervical tuberculosis with a large anterior cervical abscess combined with cervical kyphosis, providing a foundation for future efforts to treat spinal tuberculosis.

Desbridamiento con colagenasa y ácido hialurónico en úlcera diabética / Debridement with collagenase and hyaluronic acid in diabetic ulcer

La diabetes mellitus al ser una enfermedad crónica puede causar muchos trastornos a los pacientes que la padecen. Una complicación habitual son las úlceras, hasta el 25% de los pacientes las padecen a lo largo de su vida, causando un grave trastorno en la calidad de vida de estos. Vamos a presentar el caso de una paciente de nuestra consulta que, tras realizar un debut diabético, portaba una úlcera en miembro inferior izquierdo de importantes dimensiones y una cantidad abundante de esfacelo y tejido no viable. Tras el uso en nuestra consulta de la colagenasa con ácido hialurónico como método de desbridamiento enzimático, pudimos apreciar la clara evolución favorable de la úlcera. (AU)

Diabetes mellitus is a chronic disease that can cause many disorders to patients who suffer from it. A common complication is ulcers, up to 25% of patients suffer from them throughout their lives, causing a serious disruption in their quality of life.We are going to present the case of a patient in our practice who, after a diabetic debut, had a large ulcer on the left lower limb and an abundant amount of slough and non-viable tissue. After the use of collagenase with hyaluronic acid as a method of enzymatic debridement in our practice, we could appreciate the clear favorable evolution of the ulcer. (AU)

The Role of Arthroscopy After Total Ankle Replacement.

Alongside advances and trends in foot and ankle surgery, arthroscopy provides a minimally invasive option in exploring and addressing pain after total ankle replacement (TAR). It is not uncommon for patients to develop pain months or even years after TAR implantation for both fixed and mobile-bearing designs. Arthroscopic debridement of gutter pain can provide successful outcomes in the hands of the experienced arthroscopist. Surgeon preference and experience will dictate the threshold for intervention, approach, and tool selection. This article provides a brief look into the background, indications, technique, limitations, and outcomes for arthroscopy after TAR.

Osteochondral Lesions of the Talus: The Questions We Would Like Answered.

Osteochondral lesions of the talus is common pathology that foot and ankle surgeons evaluate and treat. There is a variety of treatment modalities at the surgeon's disposal to repair these lesions, which include both open and arthroscopic surgical techniques. Although both open and arthroscopic techniques have a good success rate, there are still many debates and questions that surround this pathology. The goal of this article is to discuss some of the common questions that we ask ourselves and other surgeons.

Edge trenching: a case study of a novel debridement technique.

Debridement is a vital part of wound bed preparation; however, even a perfectly debrided wound may stall if it has vertical edges or the tissue in the wound base does not merge with the wound edges. A novel debridement technique described in this case study allows wound remodelling to overcome these difficulties.

Large Sternoabdominal Wound Dehiscence after Cardiac Surgery: Challenging Multimodal Treatment.

ABSTRACT: The authors report the case of a patient who presented with a nonhealing sternal wound 3 months after cardiac bypass surgery. The patient was treated with vacuum-assisted closure, surgical debridement, and IV antibiotics. Despite repeated flap closure procedures, a top closure device, and wound dressings, the patient developed an infection, and the wound size increased from 8 × 10 cm to 20 × 20 cm, advancing from the sternal to upper abdominal region. This wound was then treated with hyperbaric oxygen therapy and nonmedicated dressings until the patient was eligible to receive a split-thickness skin graft 1.5 years after initial presentation. The main takeaway from this case was that local and systemic factors affected the outcome of each surgical closure. The failure of each preceding treatment choice that led to further increases in size and area of the wound was the main challenge. Eliminating infection, preventing development of new infection, and managing the local and systemic factors before any definite surgery are key to the eventual wound closure.

Biofilm and wound healing: from bench to bedside.

The bubbling community of microorganisms, consisting of diverse colonies encased in a self-produced protective matrix and playing an essential role in the persistence of infection and antimicrobial resistance, is often referred to as a biofilm. Although apparently indolent, the biofilm involves not only inanimate surfaces but also living tissue, making it truly ubiquitous. The mechanism of biofilm formation, its growth, and the development of resistance are ever-intriguing subjects and are yet to be completely deciphered. Although an abundance of studies in recent years has focused on the various ways to create potential anti-biofilm and antimicrobial therapeutics, a dearth of a clear standard of clinical practice remains, and therefore, there is essentially a need for translating laboratory research to novel bedside anti-biofilm strategies that can provide a better clinical outcome. Of significance, biofilm is responsible for faulty wound healing and wound chronicity. The experimental studies report the prevalence of biofilm in chronic wounds anywhere between 20 and 100%, which makes it a topic of significant concern in wound healing. The ongoing scientific endeavor to comprehensively understand the mechanism of biofilm interaction with wounds and generate standardized anti-biofilm measures which are reproducible in the clinical setting is the challenge of the hour. In this context of "more needs to be done", we aim to explore various effective and clinically meaningful methods currently available for biofilm management and how these tools can be translated into safe clinical practice.

Debridement, antibiotics and implant retention (DAIR) is successful in the management of acutely infected unicompartmental knee arthroplasty: a case series.

BACKGROUND: Infections are rare and poorly studied complications of unicompartmental knee arthroplasty (UKA) surgery. They are significantly less common compared to infections after total knee arthroplasties (TKAs). Optimal management of periprosthetic joint infections (PJIs) after a UKA is not clearly defined in the literature. This article presents the results of the largest multicentre clinical study of UKA PJIs treated with Debridement, Antibiotics and Implant Retention (DAIR). MATERIALS AND METHODS: In this retrospective case series, patients presenting between January 2016 and December 2019 with early UKA infection were identified at three specialist centres using the Musculoskeletal Infection Society (MSIS) criteria. All patients underwent a standardized treatment protocol consisting of the DAIR procedure and antibiotic therapy comprising two weeks of intravenous (IV) antibiotics followed by six weeks of oral therapy. The main outcome measure was overall survivorship free from reoperation for infection. RESULTS: A total of 3225 UKAs (2793 (86.2%) medial and 432 (13.8%) lateral UKAs) were performed between January 2016 and December 2019. Nineteen patients had early infections necessitating DAIR. The mean follow-up period was 32.5 months. DAIR showed an overall survivorship free from septic reoperation of 84.2%, with overall survivorship free from all-cause reoperation of 78.95%.The most common bacteria were Coagulase-negative Staphylococci, Staphylococcus aureus and Group B Streptococci. Three patients required a second DAIR procedure but remained free from re-infection at follow-up obviating the need for more demanding, staged revision surgery. CONCLUSIONS: In infected UKAs, the DAIR procedure produces a high rate of success, with a high survivorship of the implant.Key messagesDebridement, Antibiotics and Implant Retention (DAIR) is a successful and minimally invasive surgical option for the management of periprosthetic joint infections (PJIs) after UKA.The surface area available for bacteria to colonise is much smaller in UKAs compared to total knee arthroplasties (TKAs), and this may account for the higher success rates of the DAIR procedure in infected UKAs versus infected TKAs.A second DAIR procedure can be considered in the management of the early recurrence of PJIs with a well-fixed UKA.

[Epicondylosis : Open surgical procedure-when and how for lateral and medial epicondylitis?] / Epikondylopathie des Ellenbogens : Offenes operatives Vorgehen ­ wann, wie für lateral und medial?

BACKGROUND: Epicondylosis of the elbow are common pathologies, with a higher incidence for radial epicondylosis. Approximately 90% are self-limiting under conservative treatment. TREATMENT: Multiple surgical procedures exist for the treatment of refractory cases. Arthroscopic treatment has been described for both radial and medial pathologies. Open and arthroscopic procedures show equivalent results in the surgical treatment of radial epicondylosis. This paper describes the most common open surgical procedures for the treatment of radial epicondylosis. Furthermore, the pros and cons of the arthroscopic versus the open approach are discussed, and the indications for an open surgical procedure for radial pathologies are highlighted. The authors believe that the open technique represents the standard treatment in the surgical treatment of ulnar epicondylosis. LIMITATIONS: Arthroscopic procedures have been described, but studies comparing the clinical outcome versus open surgical treatment are lacking. The anatomic proximity of the flexor origin to the ulnar nerve with the risk of iatrogenic damage is another limiting factor. In addition, concomitant pathologies on the ulnar side can better be ruled out preoperatively, so that arthroscopy has a rather low significance in the treatment of ulnar epicondylosis.

[Arthroscopic debridement of the extensor carpi radialis brevis]. / Arthroskopisches Débridement bei lateraler Epikondylitis.

Surgical treatment of lateral epicondylitis is reserved for patients who, despite extensive conservative therapy, do not experience satisfactory relief of symptoms. As an alternative to the open procedure, arthroscopic debridement of the extensor carpi radialis brevis (ECRB) muscle is a simple and standardized procedure. The arthroscopic approach also enables the additional treatment of intra-articular pathologies such as loose bodies or osteochondral lesions. After diagnostic arthroscopy, the attachment of the ECRB is visualized via the anteromedial portal, so that under visual control the debridement of the tendon fibers of the ECRB and its bony insertion site can be performed via the anterolateral portal. Postoperatively, there is no restriction of movement of the elbow joint. The outcome after arthroscopic ECRB debridement described in the literature is equivalent to that of other surgical techniques.

Cellular Bone Matrix Leading to Disseminated Tuberculosis After Spinal Fusion: A Report of 2 Cases.

CASE: Although implanted tuberculosis (TB) is rare, a single lot of cellular bone matrix was found to be infected with TB, leading to devastating outcomes. We present 2 cases referred to our institution because of instrumentation failure caused by TB inoculation of cellular bone matrix. CONCLUSION: Irrespective of spinal region of implanted TB infection, excision of infected bone, extensive irrigation and debridement, and instrumented stabilization are of primary importance to ensure TB eradication and adequate stabilization.

Defensins of Lucilia sericata Larvae and Their Influence on Wound Repair Processes in Practical Assessment-A Study of Three Cases.

Bacteria inhabiting chronic wounds form a biofilm that prolongs and slows down the healing process. Increasingly common antibiotic resistance requires clinicians to search for effective and alternative treatment methods. Defensins are the most common antimicrobial peptides capable of eradicating pathogens. Their discovery in maggot secretions allowed for a broader understanding of the healing mechanisms, and approving the use of Lucilia sericata fly larvae in the treatment of infected wounds resulted in an effective and safe procedure. The aim of the study was to present the possibility of biofilm elimination in a chronic wound by means of medical maggots (Lucilia sericata) with the example of three selected clinical cases. The observation included three women who met the inclusion criterion of having venous insufficiency ulcers with inhibited regeneration processes. Medical maggots were applied in a biobag for three days, and observation was conducted for 21 consecutive days. In 2 cases, a significant elimination of necrotic tissue from the wound bed with local granulation tissue was observed 72 h after application of a larvae colony on the wounds. In 1 case, the application of the larvae accelerated the repair process by reducing the wound area by approximately 40% at the time of observation. The formation of biofilm in a chronic wound is one of the main causes of disturbances in its effective healing. Combining procedures (scraping, antiseptic compresses, MDT, NPWT) related to wound debridement increases the effectiveness of biofilm elimination. The use of medical maggots is a safe and effective method of choice, and it enhances the processes of debridement. However, confirmed indisputable data on their effectiveness and frequency of use in the process of stimulating healing processes are still not available in the literature.

Posterior Compartment Debridement and Varus Deformity Correction in Total Knee Arthroplasty.

BACKGROUND: Restoration of joint-line position and deformity correction remain important tenets for preserving stability and function after total knee arthroplasty (TKA). We sought to characterize the role of posterior osteophytes in the correction of alignment deformity during TKA. METHODS: We evaluated 57 patients (57 TKAs) who participated in a trial of robotic-arm assisted TKA outcomes. Weight-bearing and fixed preoperative alignment was measured using long-standing radiographs and tools of the robotic-arm tracking system, respectively. Total volume (cm3) of posterior osteophytes was quantified using preoperative planning computed tomography scans. Joint-line position was evaluated using bone resection thicknesses measured using a caliper. RESULTS: The mean (minimum to maximum) initial fixed deformity was 4 degrees (range, 0 to 11) of varus. All patients showed asymmetric posterior osteophytes. Mean total osteophyte volume was 3 cm3 (range, 1 to 9). Total osteophyte volume was positively correlated with severity of fixed deformity (r = 0.48, P = .0001). Removal of osteophytes allowed for the correction of functional alignment to within 3 degrees of neutral in all cases (mean 0 degree), with none requiring release of the superficial medial collateral ligament. Tibial joint-line position was restored to within 3 millimeters in all but 2 cases (mean increase of height, 0.6 [range, -4 to +5]). CONCLUSION: In the end-stage diseased knee, posterior osteophytes typically occupy space in the posterior capsule on the concave side of the deformity. Thorough debridement of posterior osteophytes may help facilitate management of modest varus deformity with decreased need for soft-tissue releases or adjustments to planned bone resection.