Department of Orthopaedic Surgery Works

Permanent URI for this collection

https://hdl.handle.net/1805/7627

Browse

Browsing Department of Orthopaedic Surgery Works by Title

Now showing 1 - 10 of 149
  • Thumbnail Image
    Item
    Adverse Local Tissue Reaction due to Acetabular Corrosion in Modular Dual-Mobility Constructs
    (Elsevier, 2020-12) Sonn, Kevin A.; Meneghini, Michael; Orthopaedic Surgery, School of Medicine
    Dual-mobility (DM) bearings in total hip arthroplasty (THA) have been reported to reduce dislocation rates, especially in high-risk patients, and are being rapidly adopted in primary and revision THAs. However, this technology introduces additional interfaces that have the potential to result in unforeseen complications. We present a series of 3 patients with mechanically assisted crevice corrosion at the acetabular component–metal dual-mobility liner interface. Consequently, we urge judicious use and close clinical observation of this new, effective technology in THA.
  • Thumbnail Image
    Item
    Aging negatively impacts the ability of megakaryocytes to stimulate osteoblast proliferation and bone mass
    (Elsevier, 2019) Maupin, Kevin A.; Himes, Evan R.; Plett, Artur P.; Chua, Hui Lin; Singh, Pratibha; Ghosh, Joydeep; Mohamad, Safa F.; Abeysekera, Irushi; Fisher, Alexa; Sampson, Carol; Hong, Jung-Min; Childress, Paul; Alvarez, Marta; Srour, Edward F.; Bruzzaniti, Angela; Pelus, Louis M.; Orschell, Christie M.; Kacena, Melissa A.; Orthopaedic Surgery, School of Medicine
    Osteoblast number and activity decreases with aging, contributing to the age-associated decline of bone mass, but the mechanisms underlying changes in osteoblast activity are not well understood. Here, we show that the age-associated bone loss critically depends on impairment of the ability of megakaryocytes (MKs) to support osteoblast proliferation. Co-culture of osteoblast precursors with young MKs is known to increase osteoblast proliferation and bone formation. However, co-culture of osteoblast precursors with aged MKs resulted in significantly fewer osteoblasts compared to co-culture with young MKs, and this was associated with the downregulation of transforming growth factor beta. In addition, the ability of MKs to increase bone mass was attenuated during aging as transplantation of GATA1low/low hematopoietic donor cells (which have elevated MKs/MK precursors) from young mice resulted in an increase in bone mass of recipient mice compared to transplantation of young wild-type donor cells, whereas transplantation of GATA1low/low donor cells from old mice failed to enhance bone mass in recipient mice compared to transplantation of old wild-type donor cells. These findings suggest that the preservation or restoration of the MK-mediated induction of osteoblast proliferation during aging may hold the potential to prevent age-associated bone loss and resulting fractures.
  • Thumbnail Image
    Item
    Alcohol exposure decreases osteopontin expression during fracture healing and osteopontin-mediated mesenchymal stem cell migration in vitro
    (BMC, 2018-04-27) Natoli, Roman M.; Yu, Henry; Meislin, Megan Conti-Mica; Abbasnia, Pegah; Roper, Philip; Vuchkovska, Aleksandra; Xiao, Xianghui; Stock, Stuart R.; Callaci, John J.; Orthopaedic Surgery, School of Medicine
    BACKGROUND: Alcohol consumption is a risk factor for impaired fracture healing, though the mechanism(s) by which this occurs are not well understood. Our laboratory has previously shown that episodic alcohol exposure of rodents negatively affects fracture callus development, callus biomechanics, and cellular signaling which regulates stem cell differentiation. Here, we examine whether alcohol alters chemokine expression and/or signaling activity in the mouse fracture callus during early fracture healing. METHODS: A mouse model for alcohol-impaired tibia fracture healing was utilized. Early fracture callus was examined for alcohol-effects on tissue composition, expression of chemokines involved in MSC migration to the fracture site, and biomechanics. The effects of alcohol on MSC migration and cell adhesion receptors were examined in an in vitro system. RESULTS: Mice exposed to alcohol showed decreased evidence of external callus formation, decreased callus-related osteopontin (OPN) expression levels, and decreased biomechanical stiffness. Alcohol exposure decreased rOPN-mediated MSC migration and integrin β1 receptor expression in vitro. CONCLUSIONS: The effects of alcohol exposure demonstrated here on fracture callus-associated OPN expression, rOPN-mediated MSC migration in vitro, and MSC integrin β1 receptor expression in vitro have not been previously reported. Understanding the effects of alcohol exposure on the early stages of fracture repair may allow timely initiation of treatment to mitigate the long-term complications of delayed healing and/or fracture non-union.
  • Thumbnail Image
    Item
    Alterations to maternal cortical and trabecular bone in multiparous middle-aged mice
    (Hylonome, 2017-11) Gu, Alex; Sellamuthu, Rajendran; Himes, Evan; Childress, Paul J.; Pelus, Louis M.; Orschell, Christie M.; Kacena, Melissa A.; Orthopaedic Surgery, School of Medicine
    Objectives: During the reproductive cycle, altered calcium homeostasis is observed due to variable demand for mineral requirements. This results in increased bone resorption during the time period leading up to parturition and subsequent lactation. During lactation, women will lose 1-3% of bone mineral density per month, which is comparable to the loss experienced on an annual basis post-menopausal. The purpose of this study was to determine the effect of parity on bone formation in middle-aged mice. Methods: Mice were mated and grouped by number of parity and compared with age matched nulliparous controls. Measurements were taken of femoral trabecular and cortical bone. Calcium, protein and alkaline phosphatase levels were also measured. Results: An increase in trabecular bone mineral density was observed when comparing mice that had undergone parity once to the nulliparous control. An overall decrease in trabecular bone mineral density was observed as parity increased from 1 to 5 pregnancies. No alteration was seen in cortical bone formation. No difference was observed when calcium, protein and alkaline phosphatase levels were assessed. Conclusions: This study demonstrates that number of parity has an impact on trabecular bone formation in middle-aged mice, with substantial changes in bone density seen among the parous groups.
  • Thumbnail Image
    Item
    Alterations to maternal cortical and trabecular bone in multiparous middle-aged mice
    (Hylonome, 2017-12-01) Gu, A.; Sellamuthu, R.; Himes, E.; Childress, P.J.; Pelus, L.M.; Orschell, C.M.; Kacena, Melissa A.; Orthopaedic Surgery, School of Medicine
    OBJECTIVES: During the reproductive cycle, altered calcium homeostasis is observed due to variable demand for mineral requirements. This results in increased bone resorption during the time period leading up to parturition and subsequent lactation. During lactation, women will lose 1-3% of bone mineral density per month, which is comparable to the loss experienced on an annual basis post-menopausal. The purpose of this study was to determine the effect of parity on bone formation in middle-aged mice. METHODS: Mice were mated and grouped by number of parity and compared with age matched nulliparous controls. Measurements were taken of femoral trabecular and cortical bone. Calcium, protein and alkaline phosphatase levels were also measured. RESULTS: An increase in trabecular bone mineral density was observed when comparing mice that had undergone parity once to the nulliparous control. An overall decrease in trabecular bone mineral density was observed as parity increased from 1 to 5 pregnancies. No alteration was seen in cortical bone formation. No difference was observed when calcium, protein and alkaline phosphatase levels were assessed. CONCLUSIONS: This study demonstrates that number of parity has an impact on trabecular bone formation in middle-aged mice, with substantial changes in bone density seen among the parous groups.
  • Thumbnail Image
    Item
    The American Association of Hip and Knee Surgeons, Hip Society, Knee Society, and American Academy of Orthopaedic Surgeons Position Statement on Outpatient Joint Replacement
    (Elsevier, 2018-12) Meneghini, R.; Gibson, Wilford; Halsey, David; Padgett, Douglas; Berend, Keith; Della Valle, Craig J.; Orthopaedic Surgery, School of Medicine
  • Thumbnail Image
    Item
    Analysis of the effects of spaceflight and local administration of thrombopoietin to a femoral defect injury on distal skeletal sites
    (Springer Nature, 2021-03-26) Zamarioli, Ariane; Campbell, Zachery R.; Maupin, Kevin A.; Childress, Paul J.; Ximenez, Joao P.B.; Adam, Gremah; Chakraborty, Nabarun; Gautam, Aarti; Hammamieh, Rasha; Kacena, Melissa A.; Orthopaedic Surgery, School of Medicine
    With increased human presence in space, bone loss and fractures will occur. Thrombopoietin (TPO) is a recently patented bone healing agent. Here, we investigated the systemic effects of TPO on mice subjected to spaceflight and sustaining a bone fracture. Forty, 9-week-old, male, C57BL/6 J were divided into 4 groups: (1) Saline+Earth; (2) TPO + Earth; (3) Saline+Flight; and (4) TPO + Flight (n = 10/group). Saline- and TPO-treated mice underwent a femoral defect surgery, and 20 mice were housed in space ("Flight") and 20 mice on Earth for approximately 4 weeks. With the exception of the calvarium and incisor, positive changes were observed in TPO-treated, spaceflight bones, suggesting TPO may improve osteogenesis in the absence of mechanical loading. Thus, TPO, may serve as a new bone healing agent, and may also improve some skeletal properties of astronauts, which might be extrapolated for patients on Earth with restraint mobilization and/or are incapable of bearing weight on their bones.
  • Thumbnail Image
    Item
    Arthroscopic dorsal wrist ganglion excision with color-aided visualization of the stalk: minimum 1-year follow-up
    (Springer, Part of Springer Science+Business Media, 2014-06) Ahsan, Zahab S.; Yao, Jeffrey; Department of Orthopaedic Surgery, School of Medicine
    Background Dorsal wrist ganglia (DWG) are a common, benign soft-tissue mass of the wrist. Excision of DWG is a common procedure performed by hand surgeons and may be performed using either open or arthroscopic techniques. This study aims to evaluate the frequency of stalk visualization with intralesional injection of inert dye in the course of arthroscopic excision along with incidence of recurrence with a minimum of 1-year follow-up. Methods Upon IRB approval, a retrospective chart review was performed identifying 27 patients who had consecutively undergone arthroscopic excision of a DWG with the color-aided technique at our institution with a minimum follow-up duration of 12 months. Intraoperative findings were reviewed. Patients were contacted to investigate for incidence of recurrence. Results Of the 27-patient cohort, the ganglion stalk was identified in 100 % of the color-aided arthroscopic DWG excisions. Ganglion recurrence was identified in one patient, an incidence of 3.7 %. Conclusions The color-aided technique for arthroscopic DWG visualization was found to be a safe and valuable tool for surgeons performing arthroscopic DWG resection. The intraarticular ganglion stalk was identified in 100 % of cases and patients responded well with a low incidence of recurrence.
  • Thumbnail Image
    Item
    Association of Urinary and Blood Concentrations of Heavy Metals with Measures of Bone Mineral Density Loss: a Data Mining Approach with the Results from the National Health and Nutrition Examination Survey
    (Springer, 2021) Ximenez, João Paulo B.; Zamarioli, Ariane; Kacena, Melissa A.; Barbosa, Rommel Melgaço; Barbosa, Fernando, Jr.; Orthopaedic Surgery, School of Medicine
    Osteoporosis and its consequence of fragility fracture represent a major public health problem. Human exposure to heavy metals has received considerable attention over the last decades. However, little is known about the influence of co-exposure to multiple heavy metals on bone density. The present study aimed to examine the association between exposure to metals and bone mineral density (BMD) loss. Blood and urine concentrations of 20 chemical elements were selected from 3 cycles (2005–2010) NHANES (National Health and Nutrition Examination Survey), in which we included white women over 50 years of age and previously selected for BMD testing (N = 1892). The bone loss group was defined as participants having T-score < − 1.0, and the normal group was defined as participants having T-score ≥ − 1.0. We developed classification models based on support vector machines capable of determining which factors could best predict BMD loss. The model which included the five-best features-selected from the random forest were age, body mass index, urinary concentration of arsenic (As), cadmium (Cd), and tungsten (W), which have achieved high scores for accuracy (92.18%), sensitivity (90.50%), and specificity (93.35%). These data demonstrate the importance of these factors and metals to the classification since they alone were capable of generating a classification model with a high prediction of accuracy without requiring the other variables. In summary, our findings provide insight into the important, yet overlooked impact that arsenic, cadmium, and tungsten have on overall bone health.
  • Thumbnail Image
    Item
    Authorship Trends in the Journal of Orthopaedic Research: A Bibliometric Analysis
    (Wiley, 2018) Seetharam, Abhijit; Ali, Mohammed T.; Wang, Christine Y.; Schultz, Katherine E.; Fischer, James P.; Lunsford, Shatoria; Whipple, Elizabeth C.; Loder, Randall T.; Kacena, Melissa A.; Orthopaedic Surgery, School of Medicine
    Publications are an important tool to measure one's success and achievement in academia. They can help propel a career forward and move one into a position of leadership. The overall purpose of this study was to investigate changes in bibliometric variables, authorship, and collaboration trends in the Journal of Orthopaedic Research (JOR®), since its inception in 1983. A bibliometric analysis was completed for all manuscripts meeting the inclusion criteria (638), which were published throughout the inaugural year plus one representative year of each decade. Several parameters were investigated including numbers of manuscripts, authors, collaborating institutions/countries, references, pages, and citations; region of origin and gender of authors over time and by region were main focuses. Significant increases over time were observed in all bibliometric variables analyzed except in the number of pages and citations. There was an approximate 27 percentage point increase for both female first and corresponding authors from 1983 to 2015. While this is most likely due to the increase in the number of women that have entered the field over time, similar increases in the percentage of women holding positions on the JOR editorial board or in leadership positions within in the field may have also contributed to improvements in gender parity. Understanding changes in publishing characteristics over time, by region, and by gender are critical, especially with the rising demands of publishing in academia. JOR has seen increase in most variables analyzed, including improvements in authorship by women in the field of orthopaedic research.