Streamlining Iliac Bone Harvest for Maxillary Reconstruction With Novel Use of Arthrex Osteochondral Autograft Transfer System.

This study introduces a novel application of the Osteochondral Autograft Transfer System (OATS) for autologous bone grafting during alveolar cleft repair. Approximately 75% of patients with cleft lip and palate have an alveolar cleft, which often necessitates secondary bone grafting from common donor sites such as the iliac crest. Traditional harvesting techniques, although effective, can be labor-intensive and increase the risk of donor site injury. Here the authors describe the use of OATS, which has primarily been used in orthopedic procedures like anterior cruciate ligament reconstruction, for the first time in alveolar cleft repair. It involves a minimally invasive, single-use transfer system for harvesting osteochondral autografts from the anterior iliac crest, and thereby reduces harvest time compared with traditional open approaches. The procedure is detailed from pre-operative evaluation through long-term follow-up and highlights the technique's benefits related to surgical time, ease of use, and maintenance of sizable autograft volumes. Similarly, the authors discuss other advantages of OATS, including its single-use and cordless nature, which is believed to contribute to a lower contamination risk and better intraoperative ergonomics.

Incidence and Epidemiology of Traumatic Tympanic Membrane Rupture: A National Trauma Data Bank Analysis.

The incidence of traumatic tympanic membrane rupture (TTMR) has increased over recent decades. The association of certain external injury causes and bone fracture patterns with TTMR is anecdotal. It has been suggested that a diagnosis of TTMR may be missed during the acute trauma admission. The authors sought to evaluate the incidence of TTMR according to external injury cause and evaluate the association of skull fracture patterns with TTMR using a national trauma database. A cross-sectional analysis of trauma encounters was conducted using the National Trauma Data Bank (NTDB) from 2008 to 2015. Demographic and injury data were abstracted. Poisson regression was used to determine the incidence rate ratios of tympanic membrane rupture by external injury cause and logistic regression was used to estimate odds ratios (OR) of TTMR by skull fracture type. A total of 8214 patients were identified with TTMR during acute admission. The majority were on average 30 years old, 76% male, 71% White, had a mean Injury Severity Score of 14, and 42% were admitted to level I centers. The incidence rate ratio was only higher in lightning related injuries [5.262; 95% confidence interval (CI): 4.194-6.602] when using those caused by explosives as a reference. Basilar skull (OR: 12.95; 95% CI: 12.095-12.866) and cranial vault (OR: 2.938; 95% CI: 2.647-3.260) fractures were most associated with TTMR. The high incidence TTMR in association with certain external causes of injury and types of skull fractures should drive screening in the acute setting in order to increase detection and reduce morbidity from missed injuries.

Advances in Cleft Lip and Palate Surgery.

Cleft lip with or without cleft palate is one of the most common congenital malformations, with an average prevalence of 1 in 1000 live births. Cleft lip and/or palate is incredibly phenotypically diverse, with constant advancements and refinements in how we care for patients. This article presents an in-depth review of the latest advances and current evidence in cleft lip and palate surgery. This includes presurgical infant orthopedics, perioperative practice patterns including use of enhanced recovery after surgery (ERAS) protocols, patient-reported outcome measures, and the latest adjuncts in cheiloplasty and palatoplasty.

Pandemic Puppies: Man's Best Friend or Public Health Problem? A Multidatabase Study.

INTRODUCTION: The public health implications of the COVID-19 pandemic reach beyond those of the disease itself. Various centers have anecdotally reported increases in the incidence of dog bite injuries which predominate in pediatric populations. The reasons for this increase are likely multifactorial and include an increase in canine adoptions, remote learning, and psychosocial stressors induced by lockdowns. We hypothesized that there was a significant increase in the proportion of dog bite injuries at our institution and within a nationally representative cohort. METHODS: We queried our electronic health record and the National Electronic Injury Surveillance System (NEISS) for all records pertaining to dog bites between 2015 and 2020, and the annual incidence was calculated. Poisson regression was then used to estimate whether there was a significant difference in the adjusted risk ratio for each year. RESULTS: The institutional and national cohorts revealed relative increases in the incidence of dog bite injury of 243 and 147.9 per 100,000 over the study period, respectively. Both cohorts observed significant increases of 44% and 25% in the annual incidence relative to 2019, respectively. Poisson regression revealed a significantly elevated adjusted relative risk in the institutional cohort for 2020 (2.664, CI: 2.076-3.419, P < 0.001). The national cohort also revealed an increase (1.129, CI: 1.091-1.169, P < 0.001). CONCLUSIONS: A nationwide increase in the incidence of dog bite injuries among children was observed during COVID-19 in 2020. These findings suggest that dog bites remain a public health problem that must be addressed by public health agencies.

Treatment of Sagittal Craniosynostosis Using Osteoplastic Parietal Craniotomy Flap With Distraction Osteogenesis: A Variation on Technique.

ABSTRACT: Late presentation sagittal craniosynostosis presents a unique challenge due to the decreased ability of the skull to repair the bony defects created by standard of care techniques. Distraction osteogenesis is a viable strategy to correct this defect in late presenting cases. The authors describe a variation in technique in which the temporalis muscle origin is retained, creating an osteoplastic bone flap with retained vascularity through the tem-poralis muscle. This may improve postoperative bony healing of bony defects in this compromised population. The authors present two patients who presented to them late with sagittal synostosis who were treated with distraction osteogenesis in which vascular continuity to the parietal bones is preserved through the temporalis muscle.

Long-Term Functional Outcomes of Trauma Patients With Facial Injuries.

BACKGROUND: Facial trauma can have long-lasting consequences on an individual's physical, mental, and social well-being. The authors sought to assess the long-term outcomes of patients with facial injuries. METHODS: This is a prospective multicenter cohort study of patients with face abbreviated injury scores ≥1 within the Functional Outcomes and Recovery after Trauma Emergencies registry. The Functional Outcomes and Recovery after Trauma Emergencies registry collects patient-reported outcomes data for patients with moderate-severe trauma 6 to 12 months after injury. Outcomes variables included general and trauma-specific quality of life, functional limitations, screening for post-traumatic stress disorder, and postdischarge healthcare utilization. RESULTS: A total of 188 patients with facial trauma were included: 69.1% had an isolated face and/or head injury and 30.9% had a face and/or head injuries as a part of polytrauma injury. After discharge, 11.7% of patients visited the emergency room, and 13.3% were re-admitted to the hospital. Additionally, 36% of patients suffered from functional limitations and 17% of patients developed post-traumatic stress disorder. A total of 34.3% patients reported that their injury scars bothered them, and 49.4% reported that their injuries were hard to deal with emotionally. CONCLUSIONS: Patients who sustain facial trauma suffer significant long-term health-related quality of life consequences stemming from their injuries.

Traumatic Brain Injury in Trauma Patients With Isolated Facial Fractures.

BACKGROUND: Diagnosis of traumatic brain injury (TBI), and specifically mild TBI (mTBI), is a diagnostic challenge which can delay diagnosis preventing early intervention and follow-up care. Facial fractures represent an objective surrogate marker for potential force transmission to the neural cavity. The authors' objective was to characterize the prevalence of TBI in trauma patients with isolated facial fractures stratified by injury severity. METHODS: The authors performed a retrospective cross-sectional study of the National Trauma Databank (NTDB) from 2007 to 2014 assessing a total of 1,867,761 participants identified as having a TBI and 306,785(60.2%) had an isolated facial fracture using ICD-9 codes. TBI severity was subdivided using Glasgow Coma Scale into mTBI and moderate-to-severe TBI. Logistic regression assessed odds of mTBI and moderate-to-severe TBI with different isolated facial fractures adjusted for injury severity. RESULTS: Trauma patients with isolated facial fractures of the nasal bone, mandible, malar region and maxilla, orbital floor, and alveolar and palate had a concomitant prevalence of mTBI ranging from 21.3% to 46.0% and moderate-to-severe TBI ranging from 7.3% to 18.4%. Mandibular fractures had the lowest odds of mTBI and moderate to severe TBI while alveolar and palate fractures had the highest odds of mTBI [OR3.20,95%CI (3.11-3.30)] and moderate to severe TBI [OR3.83,95%CI (3.65-4.01)]. CONCLUSIONS: Isolated facial fractures have a high prevalence of mTBI at all injury severity levels. Clinicians can use the presence of facial fractures in trauma patients to serve as clinical markers for TBI, without distracting from already existing trauma protocols and their focus on treatment of immediate life-threatening injuries raising both awareness and potential for early intervention.

Face Transplant: Status of Current Supporting Technology to Plan and Perform the Operation and Monitor the Graft in the Postoperative Period.

Face transplant has rapidly advanced since the first operation in 2005, and to date, 40 partial or full-face transplants have been performed. The safety and efficacy of this operation are aided at all phases by supporting technologies. These include advanced imaging techniques to plan the operation, devices to monitor the flap in the immediate perioperative period, and noninvasive imaging and serum markers to monitor for acute and chronic rejection. Some of the technologies, such as those used in the immediate perioperative period, have extensive evidence supporting their use, whereas those to detect acute or chronic rejection remain investigational. The technologies of today will continue to evolve and make the operation safer with improved outcomes; however, the most significant barrier for face transplant continues to be immunologic rejection.

Trismus in Face Transplantation Following Ballistic Trauma.

BACKGROUND: Trismus can be a challenging consequence of ballistic trauma to the face, and has rarely been described in the setting of face transplantation. Almost half of all current face transplant recipients in the world received transplantation to restore form and function after a ballistic injury. Here we report our experience and challenges with long standing trismus after face transplantation. METHODS: We reviewed the medical records of our face transplant recipients whose indication was ballistic injury. We focused our review on trismus and assessed the pre-, peri- and postoperative planning, surgery and functional outcomes. RESULTS: Two patients received partial face transplantation, including the midface for ballistic trauma. Both patients suffered from impaired mouth opening, speech intelligibility, and oral competence. Severe scarring of the temporomandibular joint (TMJ) required intraoperative release in both patients, and additional total condylectomy on the left side 6 months posttransplant for 1 patient. Posttransplant, both patients achieved an improvement in mouth opening; however, there was persistent trismus. One year after transplantation, range of motion of the jaw had improved for both patients. Independent oral food intake was possible 1 year after surgery, although spillage of liquids and mixed consistency solids persisted. Speech intelligibility testing showed impairments in the immediate postoperative period, with improvement to over 85% for both patients at 1 year posttransplant. CONCLUSIONS: Ballistic trauma to the face and subsequent reconstructive measures can cause significant scarring and covert injuries to structures such as the TMJ, resulting in long standing trismus. Meticulous individual planning prior to interventions such as face transplantation must take these into account. We encourage intraoperative evaluation of these structures as well as peri- and postoperative treatment when necessary. Due to the nature of the primary injury, functional outcomes after face transplantation in these patients may differ substantially from those of other indications.

Management of Rhinophyma: Outcomes Study of the Subunit Method.

BACKGROUND: Rhinophyma causes a nasal deformity and functional airway obstruction. Partial excision (eg, tangential) with secondary healing commonly removes hypertrophic soft tissues but does not improve nasal support. The subunit method for rhinophyma uses 6 nasal flaps to provide exposure for removal of rhinophymatous tissue and enhance structure. The purpose of this study was to evaluate outcomes of subunit method. METHODS: Medical records of patients with rhinophyma treated with the subunit method between 2013 and 2016 were analyzed. The technique comprises degloving the distal half of the nose by elevating 6 subunit-based flaps; debulking phymatous tissues to perichondrium; enhancing nasal support with sutures/cartilage grafts; trimming excess skin; and redraping the soft tissues. Patient age, gender, need for cartilage grafts or skin grafts, revisions, and follow-up were assessed. RESULTS: The study comprised 8 patients (6 male). Mean age was 63 years (range 34-72). All individuals had interdomal sutures for tip enhancement and 4 patients underwent cartilage grafts (alar batten) to correct external valve collapse. One patient had 2 subunits (alar) replaced with skin graft. Average follow-up was 1.6 years (range 0.2-3.7). Six patients underwent revisional procedures primarily to modify the scar between the dorsum and tip subunits. CONCLUSION: The subunit method addresses the 3 fundamental problems of the rhinophymatous nose: hypertrophic sebaceous tissues, excess skin, and destruction of support. Most patients may benefit from a minor revisional procedure to optimize the result. Individuals should be counseled that operation will likely require 2 stages.

Titanium wound chambers for wound healing research.

Standardized and reproducible animal models are crucial in medical research. Rodents are commonly used in wound healing studies since, they are easily available, affordable and simple to handle and house. However, the most significant limitation of rodent models is that the wounds heal by contraction while in humans the primary mechanisms of healing are reepithelialization and granulation tissue formation. The robust contraction results in faster wound closure that complicates the reproducibility of rodent studies in clinical trials. We have developed a titanium wound chamber for rodent wound healing research. The chamber is engineered from two pieces of titanium and is placed transcutaneously on the dorsum of a rodent. The chamber inhibits wound contraction and provides a means for controlled monitoring and sampling of the wound environment in vivo with minimal foreign body reaction. This technical report introduces two modalities utilizing the titanium chambers in rats: (1) Wound in a skin island model and, (2) Wound without skin model. Here, we demonstrate in rats how the "wound in a skin island model" slows down wound contraction and how the "wound without skin" model completely prevents the closure. The titanium wound chamber provides a reproducible standardized models for wound healing research in rodents.

Alloderm Covering Over Titanium Cranioplasty May Minimize Contour Deformities in the Frontal Bone Position.

BACKGROUND: Titanium cranioplasty is commonly used for surgical closure of skull defects post craniectomy. Superficial implantation of the mesh can result in discomfort, palpability, and in extreme patients, exposure of the mesh. Exposed titanium mesh can be complicated by infections and often requires implant revision or removal. Generally, the contour of the titanium mesh is camouflaged in the hairline of the patient and any aesthetic complication can remain inconspicuous. However, in the frontal bone position the thin hairless forehead skin often may not easily hide the contour of the underlying titanium mesh. OBJECTIVES: The goal of this study was to demonstrate the usage of an alloderm covering over the titanium cranioplasty to possibly minimize the contour irregularities of titanium. SURGICAL TECHNIQUE: Our index patient, a 22-year-old woman, was operated for left frontal craniectomy for frontal bone tumor extending to brain parenchyma. This resulted in a surgical defect that was repaired with titanium mesh cranioplasty and dural patch. It was felt that the patient would potentially feel and see the titanium mesh cranioplasty under the thin frontalis muscle. Therefore, over top of the titanium mesh a remnant piece of AlloDerm unused after the dural patch was placed to buffer the potential contour deformity. Postoperatively, the contour appears natural and the patient does not report any complaints of discomfort or mesh palpability. CONCLUSION: In a thin-skinned patient undergoing titanium mesh cranioplasty, the risk of mesh palpability or exposure can be significant, especially in areas of non-hair-bearing scalp and the protruding areas of the skull. Alloderm covering over the titanium mesh can provide improved aesthetic outcomes by minimizing contour deformity and may serve as an additional buffer in thin scalp.

Cdc42 and p190RhoGAP activation by CCN2 regulates cell spreading and polarity and induces actin disassembly in migrating keratinocytes.

Cell migration requires spatiotemporal integration of signals that regulate cytoskeletal dynamics. In response to a migration-promoting agent, cells begin to polarise and extend protrusions in the direction of migration. These cytoskeletal rearrangements are orchestrated by a variety of proteins, including focal adhesion kinase (FAK) and the Rho family of GTPases. CCN2, also known as connective tissue growth factor, has emerged as a regulator of cell migration but the mechanism by which CCN2 regulates keratinocyte function is not well understood. In this article, we sought to elucidate the basic mechanism of CCN2-induced cell migration in human keratinocytes. Immunohistochemical staining was used to demonstrate that treatment with CCN2 induces a migratory phenotype through actin disassembly, spreading of lamellipodia and re-orientation of the Golgi. In vitro assays were used to show that CCN2-induced cell migration is dependent on FAK, RhoA and Cdc42, but independent of Rac1. CCN2-treated keratinocytes displayed increased Cdc42 activity and decreased RhoA activity up to 12 hours post-treatment, with upregulation of p190RhoGAP. An improved understanding of how CCN2 regulates cell migration may establish the foundation for future therapeutics in fibrotic and neoplastic diseases.

Three patients with full facial transplantation.

Unlike conventional reconstruction, facial transplantation seeks to correct severe deformities in a single operation. We report on three patients who received full-face transplants at our institution in 2011 in operations that aimed for functional restoration by coaptation of all main available motor and sensory nerves. We enumerate the technical challenges and postoperative complications and their management, including single episodes of acute rejection in two patients. At 6 months of follow-up, all facial allografts were surviving, facial appearance and function were improved, and glucocorticoids were successfully withdrawn in all patients.

The external microenvironment of healing skin wounds.

The skin wound microenvironment can be divided into two main components that influence healing: the external wound microenvironment, which is outside the wound surface; and the internal wound microenvironment, underneath the surface, to which the cells within the wound are exposed. Treatment methods that directly alter the features of the external wound microenvironment indirectly affect the internal wound microenvironment due to the exchange between the two compartments. In this review, we focus on the effects of temperature, pressure (positive and negative), hydration, gases (oxygen and carbon dioxide), pH, and anti-microbial treatment on the wound. These factors are well described in the literature and can be modified with treatment methods available in the clinic. Understanding the roles of these factors in wound pathophysiology is of central importance in wound treatment.

Medical 3D Printing for the Radiologist.

While use of advanced visualization in radiology is instrumental in diagnosis and communication with referring clinicians, there is an unmet need to render Digital Imaging and Communications in Medicine (DICOM) images as three-dimensional (3D) printed models capable of providing both tactile feedback and tangible depth information about anatomic and pathologic states. Three-dimensional printed models, already entrenched in the nonmedical sciences, are rapidly being embraced in medicine as well as in the lay community. Incorporating 3D printing from images generated and interpreted by radiologists presents particular challenges, including training, materials and equipment, and guidelines. The overall costs of a 3D printing laboratory must be balanced by the clinical benefits. It is expected that the number of 3D-printed models generated from DICOM images for planning interventions and fabricating implants will grow exponentially. Radiologists should at a minimum be familiar with 3D printing as it relates to their field, including types of 3D printing technologies and materials used to create 3D-printed anatomic models, published applications of models to date, and clinical benefits in radiology. Online supplemental material is available for this article.

Reconstruction of Rare Skull Metastases Using Free Latissimus Dorsi Flap and the Role of Preoperative Embolization in Hypervascular Skull Tumors.

Metastatic tumors are the most common cranial neoplasms in adults. Skull metastases from rare primary tumors, such as cholangiocarcinoma or pancreatic neuroendocrine tumor, are extremely uncommon and rarely reported. Given the scarcity and variation of these rare skull metastases, treatments and outcomes of such patients are of interest to treating surgeons. The authors describe the treatment algorithm, course, and outcomes of 2 patients with rare gastrointestinal skull metastases. The first patient had intrahepatic cholangiocarcinoma metastatic to the skull, while the second patient developed a solitary skull metastasis secondary to a pancreatic neuroendocrine tumor. As part of this report, the authors include a literature review of rare skull metastases as well as the treatment of these 2 patients. Both the patients ultimately underwent successful resection of the tumor for relief of their clinical symptoms. Wide resections in both patients necessitated reconstruction using a free latissimus dorsi muscle flap in both the patients. Preoperative embolization of the hypervascular cholangiocarcinoma skull metastasis was performed prior to resection in the first patient. To date, there have been only 4 such reports of skull metastases from intrahepatic cholangiocarcinoma and limited reported cases of isolated skull metastases from a pancreatic neuroendocrine tumor.In patients with large or numerous skull metastasis from rare primary tumors, surgical resection should be considered for symptomatic improvement. In cases of hypervascular lesions, preoperative embolization can be considered to decrease the intraoperative bleeding. Free tissue transfers using myocutaneous flaps such as latissimus dorsi help in obliterating dead space, and creating a healthy soft tissue envelope to withstand postoperative radiation treatment. In addition, a chimeric flap can be designed to include additional muscle or soft tissue to obliterate and exclude the sinus cavities.

Quality of healing: defining, quantifying, and enhancing skeletal muscle healing.

Skeletal muscle injury is common in everyday physical activity and athletics, as well as in orthopedic trauma and disease. The overall functional disability resulting from muscle injury is directly related to the intrinsic healing properties of muscle and extrinsic treatment options designed to maximize repair and/or regeneration of muscle tissue all while minimizing pathologic healing pathways. It is important to understand the injury and repair pathways in order to improve the speed and quality of recovery. Recent military conflicts in Iraq and Afghanistan have highlighted the importance of successfully addressing muscular injury and showed the need for novel treatment options that will maximize functional regeneration of the damaged tissue. These severe, wartime injuries, when juxtaposed to peacetime, sports-related injuries, provide us with interesting case examples of the two extreme forms of muscular damage. Comparing and contrasting the differences in these healing pathways will likely provide helpful cues that will help physicians recapitulate the near complete repair and regeneration in less traumatic injuries in addition to more severe cases.