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1.
Wound Repair Regen ; 30(4): 526-535, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35641440

RESUMO

The fluid immersion simulation system (FIS) has demonstrated good clinical applicability. This is the first study to compare surgical flap closure outcomes of FIS with an air-fluidised bed (AFB), considered as standard of care. The success of closure after 14 days post-op was the primary endpoint. Secondary endpoints were incidences of complications in the first 2 weeks after surgery and the rate of acceptability of the device. Thirty-eight subjects were in the FIS group while 42 subjects were placed in the AFB group. Flap failure rate was similar between groups (14% vs. 12%; p = 0.84). Complications, notably dehiscence and maceration, were significantly higher in the FIS group (40% vs. 17%; p = 0.0296). The addition of a microclimate regulation device (ClimateCare®) to FIS for the last 43 patients showed a significant decrease in the rate of flap failure (71% vs. 16%; p = 0.001) and incidence of complications (33% vs. 0%; p = 0.011). There was no statistically significant difference between the FIS and air-fluidised bed (AFB) in the rate of acceptability (nurse acceptance: 1.49 vs. 1.72; p = 0.8; patient acceptance: 2.08 vs. 2.06; p = 0.17), which further illustrates the potential implementation of this tool in a patient-care setting. Our results show that the use of ClimateCare® in combination with FIS can be a better alternative to the AFB in surgical closure of pressure ulcers.


Assuntos
Úlcera por Pressão , Humanos , Imersão , Complicações Pós-Operatórias , Úlcera por Pressão/epidemiologia , Úlcera por Pressão/cirurgia , Estudos Prospectivos , Retalhos Cirúrgicos , Cicatrização/fisiologia
2.
J Wound Care ; 31(Sup5): S6-S12, 2022 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-35576198

RESUMO

OBJECTIVE: Pressure ulcers (PUs) are hard-to-heal, open wounds that affect millions of adults worldwide. Patients experience physical, mental, social and financial impairment. On average, <50% of stage 3 and 4 PUs heal by the sixth month. Treatment of PUs is highly variable due to a patient's comorbidities, demographics and wound characteristics. Because of this, there exists no standard dressing for PUs. Altrazeal transforming powder dressing (TPD, Uluru Inc., US) offers a promising new form of wound treatment; however, little evidence exists for TPD in the treatment of hard-to-heal PUs. This case series sought to examine the effect of TPD in hard-to-heal PUs that have previously undergone unsuccessful standard of care (SoC) wound therapy. METHODS: This case series used retrospective data from patients with stage 2-4 PUs that failed to heal after SoC therapies. Factors examined were: number of dressing changes; time between dressing changes; time to wound closure; and pain level. While data were assessed for all patients, we focused on the six particular cases that most clearly illustrated the effect of TPD on wound healing. RESULTS: Each of the 21 patients treated with TPD experienced successful and expedited wound closure. Stage 4 PUs took an average of 87 days with approximately six dressing changes to closure. Stage 3 PUs took an average of 41 days with approximately four dressing changes, and stage 2 PUs an average of 13 days to closure with approximately one dressing change. In the cases presented herein for which pain scores were reported, each showed a reduction in pain from an 8 or 9/10 to a 1 or 2/10 with the first dressing change. CONCLUSION: In this case series, TPD effectively reduced pain and healed PUs that had previously failed SoC interventions. We suggest future prospective studies in order to more effectively measure the wound healing capability and healthcare utilisation of TPD for treatment of PUs.


Assuntos
Úlcera por Pressão , Adulto , Bandagens , Humanos , Dor , Pós , Úlcera por Pressão/terapia , Estudos Prospectivos , Estudos Retrospectivos , Supuração
3.
Aesthet Surg J ; 42(8): 956-963, 2022 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-35439819

RESUMO

BACKGROUND: Aggregated data show that Black patients undergo disproportionately lower rates of cosmetic surgery than their Caucasian counterparts. Similarly, laboratory findings indicate that social media representation is lower among Black patients for breast reconstruction surgery, and it is expected that this could be the case in cosmetic surgery as well. OBJECTIVES: The aim of this study was to explore the social media representation of Black patients and physicians in the 5 most common cosmetic surgery procedures: rhinoplasty, blepharoplasty, abdominoplasty, breast augmentation, and liposuction. METHODS: Data were collected from RealSelf (Seattle, WA), the most popular social media site for sharing cosmetic surgery outcomes. The skin tone of 1000 images of patients in each of the top 5 cosmetic surgeries was assessed according to the Fitzpatrick scale, a commonly utilized skin tone range. Additionally, the Fitzpatrick scores of 72 providers who posted photographs within each surgical category were collected. RESULTS: Black patients and providers are underrepresented in rhinoplasty, blepharoplasty, breast augmentation, and liposuction compared with the general population (defined by the US Census Bureau), but were proportionately represented in abdominoplasty. Additionally, it was found that patients most often matched Fitzpatrick scores when both had scores of 2, whereas patients with a score of 5 and 6 rarely matched their provider's score. CONCLUSIONS: The underrepresentation of Black patients and providers in social media for cosmetic surgery may well discourage Black patients from pursuing cosmetic surgeries. Therefore, it is essential to properly represent patients to encourage patients interested in considering cosmetic surgery.


Assuntos
Abdominoplastia , Lipectomia , Médicos , Mídias Sociais , Cirurgia Plástica , Humanos
4.
Ann Plast Surg ; 87(2): 222-229, 2021 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-33470625

RESUMO

BACKGROUND: Despite the possibility of using botulinum toxin to improve perfusion and prevent vasospasm, only a few studies have examined the use of botulinum toxin in the setting of flap surgery and thrombosis, and the mechanisms have not been fully explained. OBJECTIVE: The primary objective of this study was to provide a comprehensive review of the effectiveness of botulinum toxin in anastomotic thrombosis prevention and surgical flap survival to determine the value of conducting large-scale human trials. METHODS: Using the SYRCLE and CAMRADES criteria, a systematic review was performed. PubMed, Medline, EmBase, and the Cochrane Library were searched for studies that met our eligibility criteria. RESULTS: Twenty studies were included in the final selection. A total of 397 subjects were included. Eighteen studies used botulinum toxin type A alone, one used botulinum toxin type B alone, and only one used both botulinum toxin type A and botulinum toxin type B. The most commonly used injection technique was a preoperative intradermal injection. The most common procedure performed was a pedicled flap with random pattern skin flaps (65%). The mean injection dose was 28.17 ± 49.21 IU, whereas the mean reported injection time for studies using animal models was 7.4 ± 6.84 days. CONCLUSIONS: Similar mechanisms demonstrated in animal models may be replicable in humans, allowing botulinum toxin to be used to prolong flap survival. However, many factors, such as optimal injection techniques, dosages, and long-term outcomes of botulinum use in flap surgery, need to be further assessed before applying this to clinical practice.


Assuntos
Toxinas Botulínicas Tipo A , Fármacos Neuromusculares , Trombose , Anastomose Cirúrgica , Animais , Humanos , Injeções , Modelos Animais , Retalhos Cirúrgicos
5.
Plast Surg (Oakv) ; 31(2): 118-125, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-37188140

RESUMO

Lack of surgical access severely harms countless populations in many low- and middle-income countries (LMICs). Many types of surgery could be fulfilled by the plastic surgeon, as populations in these areas often experience trauma, burns, cleft lip and palate, and other relevant medical issues. Plastic surgeons continue to contribute significant time and energy to global health, primarily by participating in short mission trips intended to provide many surgeries in a short time frame. These trips, while cost-effective for lack of long-term commitments, are not sustainable as they require high initial costs, often neglect to educate local physicians, and can interfere with regional systems. Education of local plastic surgeons is a key step toward creating sustainable plastic surgery interventions worldwide. Virtual platforms have grown popular and effective-particularly due to the coronavirus disease 2019 pandemic-and have shown to be beneficial in the field of plastic surgery for both diagnosis and teaching. However, there remains a large potential to create more extensive and effective virtual platforms in high-income nations geared to educate plastic surgeons in LMICs to lower costs and more sustainably provide capacity to physicians in low access areas of the world.


Le manque d'accès à la chirurgie nuit sévèrement aux vastes populations de nombreux pays à revenus intermédiaires et faibles (PRIF). De nombreux types d'interventions chirurgicales pourraient être exécutés par les chirurgiens plastiques, car les populations de ces régions ont souvent des traumatismes, des brûlures, des fentes labio-palatines et d'autres problèmes médicaux pertinents. La chirurgie plastique continue d'accorder beaucoup de temps et d'énergie à la santé globale, principalement en participant à de courtes missions ayant pour but de résoudre de nombreux problèmes chirurgicaux dans un court laps de temps. Ces voyages, bien que rentables et influenceurs à court terme, n'ont pas d'effet durable, car ils ont des coûts initiaux élevés, négligent souvent d'éduquer les médecins locaux et peuvent perturber les systèmes régionaux. La formation de chirurgiens plastiques locaux est une étape essentielle pour la création d'interventions de chirurgie plastique durables dans le monde. Les plateformes virtuelles sont devenues populaires et efficaces, en particulier à cause de la pandémie de COVID-19, et ont montré leurs avantages dans le champ de la chirurgie plastique en matière de diagnostic et d'enseignement des divers facteurs de chirurgie plastique. Il existe un vaste potentiel pour la création de plateformes virtuelles permettant à des experts des pays à revenus élevés de former des chirurgiens plastiques de PRIF afin d'offrir des moyens plus rentables et durables à ces médecins exerçant dans des régions du monde où l'accès aux soins est plus limité.

6.
Plast Reconstr Surg Glob Open ; 11(4): e4903, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37124386

RESUMO

Asian rhinoplasty generally requires augmentation procedures rather than reduction. Alloplastic grafts are fraught with higher complication rates. Autologous cartilage grafts are safer. However, Asian patients typically do not have adequate septal cartilages, and other autologous cartilage grafts may cause surgical site morbidities, prolonged surgical time, and complications, including warping and infection. Asian rhinoplasties were performed using fresh frozen cartilage by the senior author. Patients' demographics and medical histories were recorded. Anthropometric measurements (nasofrontal angle, nasofacial angle, nasolabial angle, and Goode ratio) were taken on two-dimensional photographs. FACE-Q scales were used to assess patient-reported outcomes. Five Asian patients underwent rhinoplasty using the fresh frozen cartilage and were followed up for an average period of 14.2 ± 3.35 months. There was no resorption, warping, or infection. Anthropometric measurements showed no significant changes 2-4 months or 8-20 months after surgery. At the time of the 1-year follow-up, mean FACE-Q Satisfaction with Nose, and Satisfaction with Nostrils scores improved from 35.2 ± 10.06 to 60 ± 15.48 (P = 0.0002), and 42.6 ± 20.31 to 59.8 ± 38.21 (P = 0.12), respectively. Fresh frozen cadaveric cartilage is a novel option for Asian rhinoplasty. Our study demonstrated its safety and satisfying surgical outcomes.

7.
Plast Reconstr Surg Glob Open ; 11(10): e5315, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37799442

RESUMO

Background: There are different types of grafts for rhinoplasty, each with certain advantages and disadvantages. Fresh frozen cadaveric costal allograft (CCA) provides an alternative to rhinoplasties. The aim of this study was to compare the outcomes of fresh frozen CCA and traditional autologous costal cartilage in cosmetic and reconstructive rhinoplasty procedures. Methods: This is a prospective, single-center, nonrandomized, open-label clinical trial. Objective assessment to evaluate warping, resorption, and displacement of the cartilage was achieved by measuring the differences of standardized values (deviation angle, nasofrontal angle, total facial convexity, nasofacial angle, and nasolabial angle) obtained at 6-months and 12-months postoperative follow-up on standard two-dimensional photographs (Δ = ∣measurement6 - measurement12∣). Subjective assessment was measured by the FACE-Q assessment. Results: Fifty eligible patients between March 2017 and October 2020 were included. The average age was 43.9 ±â€…16.6 years and the mean follow-up period was 14.8 months. In the control group, the changes (Δ) in the deviation angle and nasolabial angle were greater than in the CCA group (P < 0.05). In the CCA group, the mean score of satisfaction with nose improved at 6 months and 1 year postoperatively (P < 0.05). The mean score of satisfaction with nostrils and overall facial appearance also increased in the CCA group at 6 months postoperatively (P < 0.05). Six patients from the CCA group and 10 patients from the control group experienced postoperative complications. Conclusions: Fresh frozen CCA is a safe and reliable source of rhinoplasty grafts. It is aseptic, readily available, and free of donor site complications.

8.
Wounds ; 34(10): 250-253, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-36219711

RESUMO

INTRODUCTION: Clinical options are lacking for the management of chronic wounds or ulcers following failed debridement, skin grafting, or negative pressure wound therapy dressings. OBJECTIVE: This retrospective case series evaluated the efficacy of injectable AAM in the management and closure of chronic wounds. MATERIALS AND METHODS: Patients with nonhealing wounds of any etiology, anatomic location, and length of chronicity were included; those with multiple chronic wounds or prior skin grafting for wound repair were excluded. Data on location, etiology, chronicity, and number of AAM applications were collected for each wound. Patients were evaluated for possible complications related to wound healing and infection. Eleven patients (7 males, 4 females), each with 1 chronic wound, were recruited (average age, 65 years). Wound etiologies were postoperative (n = 7), traumatic (n = 2), and foot ulcer (n = 2). Average wound dimensions were 8.45 mm × 7.36 mm, and the average chronicity was 3.77 months. Ten patients received only 1 application of AAM, and 1 patient received 2 treatments 5 days apart. Average follow-up time was 6.6 weeks. RESULTS: Seven patients (63%) achieved wound closure, 4 of which (57%) healed within 1 week of application. CONCLUSION: Most patients with chronic wounds treated with AAM experienced complete wound closure. AAM shows promising results for enhancing wound healing by providing scaffolding for cell growth.


Assuntos
Pé Diabético , Úlcera do Pé , Tratamento de Ferimentos com Pressão Negativa , Idoso , Aloenxertos , Pé Diabético/terapia , Feminino , Úlcera do Pé/terapia , Humanos , Masculino , Estudos Retrospectivos , Cicatrização
9.
Plast Reconstr Surg ; 150(5): 1006-1014, 2022 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-35993880

RESUMO

BACKGROUND: Because of the high volume of Asian eyelid operations performed and the complexity of the Asian eye, there is a need to define exactly what anthropometric measurements determine attractiveness. METHODS: Eye photographs of young East Asian women were collected from publicly available sources online. Photographs were evaluated on a Likert scale ranging from 1 to 5 for attractiveness. Thirty-seven anthropometric measurements were collected using ImageJ from the most attractive and least attractive eyes to discover which features play the most important role in attractiveness. RESULTS: A total of 322 right eye photographs were evaluated for attractiveness. Sixty-six eyes received a median score of greater than or equal to 4.0 and were included in the attractive cohort. Forty-three eyes received a score of less than or equal to 2.0 and were included in the unattractive cohort. The superior brow peak was more lateralized compared to the upper lid crease and upper lash line peaks in attractive eyes. A greater palpebral aperture height-to-upper lid show ratio was found to be more associated with attractive eyes than with unattractive eyes. At the midpupillary line, the ratio was on average 1.58 ± 0.32 in attractive eyes and 1.22 ± 0.43 in unattractive eyes ( p < 0.001). Eyes with convergence of the upper lid crease with the upper lash line were more likely to be deemed unattractive ( p < 0.001). CONCLUSIONS: East Asian eyes have specific anthropometric measurements that are more associated with attractiveness. These ideal measurements are different from those in Caucasians, suggesting ethnic variability in features defining attractiveness and a need to tailor surgical care appropriately.


Assuntos
Beleza , Pálpebras , Humanos , Feminino , Pálpebras/cirurgia , Povo Asiático , População Branca , Estudos de Coortes
10.
J Cancer Educ ; 26(2): 294-300, 2011 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-20658222

RESUMO

The aim of this study was to evaluate the impact of a psychosocial training programme for speech therapists on their performance skills in patient-therapist communication in general and empathy in particular. Twenty-three speech therapists were interviewed in a pseudo-randomised controlled trial. Communication skills were tested using questionnaires with open questions. Respondents were asked to find adequate replies to clinical vignettes. The vignettes briefly described a patient's physical state and contained a statement from the patient expressing some distress. Answers were coded with qualitative content analysis. Communication skills improved considerably in terms of frequency of conducive communication (especially empathy) and width of conducive communicative repertoire. Negative communication preferences were reduced. Psychosocial training for speech therapists can improve communication skills manifestly and is therefore recommended for further use.


Assuntos
Cuidadores/educação , Comunicação , Empatia , Oncologia/educação , Neoplasias/psicologia , Neoplasias/terapia , Adulto , Competência Clínica , Coleta de Dados , Feminino , Humanos , Entrevistas como Assunto , Masculino , Pessoa de Meia-Idade , Relações Médico-Paciente , Projetos Piloto , Pesquisa Qualitativa , Apoio Social , Fonoterapia , Inquéritos e Questionários
11.
Cureus ; 13(5): e14938, 2021 May 10.
Artigo em Inglês | MEDLINE | ID: mdl-34123635

RESUMO

Due to the ongoing coronavirus disease 2019 (COVID-19) pandemic, almost all residency programs have adopted virtual interviewing for the National Residency Matching Program® (NRMP) or The Match® 2021. Hence, applicants have had to adapt quickly to this process, since the interviewers and the applicants were mostly inexperienced regarding this process. To date, program directors have had a successful experience on this new modality, and since the pandemic continues to limit in-person meetings and given the benefits that virtual interviews provide in terms of transportation, booking, and cost, there is a high chance that interviews for The Match 2022 will also be conducted in the same, virtual way. In light of this, we performed a review of the literature by using PubMed, Embase, Scopus, and other online resources to analyze certain critical aspects and offer recommendations for residency and fellowship applicants to improve their performance in virtual interviews. Despite the current surge of virtual interviewing in today's technology-driven era, virtual interviewing programs for residency and fellowship candidates selection are still in their infancy. We have learned that applicants can control certain aspects such as technology, settings, dress code, and behavior so that they can tailor their experience to make it more favorable and fulfilling. Ensuring proper preparation in terms of the variables that can influence the virtual experience is key for a successful interview.

12.
Int J Spine Surg ; 13(6): 522-530, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31970047

RESUMO

BACKGROUND: There is an absence of work on vertebral endplate response to peripheral loading following disc removal and interbody placement. Endplate deflection into the interbody space may impart beneficial strain on the developing fusion mass, influencing bone formation and remodeling. The aim of this study was to verify endplate deformation due to peripheral loading using a custom transducer and to investigate whether endplate motion is inhibited by implant design. METHODS: A total of 14 porcine (L4, L5) vertebrae were assigned to open or strutted implant designs. A custom transducer was placed on the endplate while 500 N was applied to the implant at 1 Hz for 500 cycles. Endplate motion was acquired for each time point and averaged among specimens of the same design. The rates and magnitudes of endplate deformation were compared between implant designs using unpaired t tests. RESULTS: Peripheral loading of both implant designs resulted in endplate deflection into the interbody space. The open implant design demonstrated an increased rate and magnitude of endplate deformation when compared with strutted implants. CONCLUSION: Interbody cage design directly influences the dynamic motion of the vertebral endplate during cyclic loading. A larger, faster deflection of the endplate could increase the strain rate, duration, and magnitude on the developing interbody fusion mass. These parameters of dynamic strain have been correlated with increased bone formation and remodeling. CLINICAL RELEVANCE: Unimpeded endplate deformation in an open cage design could impart a strain pattern on the developing fusion mass that increases bone formation and remodeling, ultimately leading to a faster and stronger fusion.

13.
Spine J ; 13(11): 1563-70, 2013 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-23684238

RESUMO

BACKGROUND CONTEXT: Polyether-ether-ketone (PEEK) and titanium-aluminum-vanadium (titanium alloy) are used frequently in lumbar spine interbody fusion. Osteoblasts cultured on microstructured titanium generate an environment characterized by increased angiogenic factors and factors that inhibit osteoclast activity mediated by integrin α2ß1 signaling. It is not known if this is also true of osteoblasts on titanium alloy or PEEK. PURPOSE: The purpose of this study was to determine if osteoblasts generate an environment that supports angiogenesis and reduces osteoclastic activity when grown on smooth titanium alloy, rough titanium alloy, or PEEK. STUDY DESIGN: This in vitro study compared angiogenic factor production and integrin gene expression of human osteoblast-like MG63 cells cultured on PEEK or titanium-aluminum-vanadium (titanium alloy). METHODS: MG63 cells were grown on PEEK, smooth titanium alloy, or rough titanium alloy. Osteogenic microenvironment was characterized by secretion of osteoprotegerin and transforming growth factor beta-1 (TGF-ß1), which inhibit osteoclast activity and angiogenic factors including vascular endothelial growth factor A (VEGF-A), fibroblast growth factor 2 (FGF-2), and angiopoietin-1 (ANG-1). Expression of integrins, transmembrane extracellular matrix recognition proteins, was measured by real-time polymerase chain reaction. RESULTS: Culture on titanium alloy stimulated osteoprotegerin, TGF-ß1, VEGF-A, FGF-2, and angiopoietin-1 production, and levels were greater on rough titanium alloy than on smooth titanium alloy. All factors measured were significantly lower on PEEK than on smooth or rough titanium alloy. Culture on titanium alloy stimulated expression of messenger RNA for integrins that recognize Type I collagen in comparison with PEEK. CONCLUSIONS: Rough titanium alloy stimulated cells to create an osteogenic-angiogenic microenvironment. The osteogenic-angiogenic responses to titanium alloy were greater than PEEK and greater on rough titanium alloy than on smooth titanium alloy. Surface features regulated expression of integrins important in collagen recognition. These factors may increase bone formation, enhance integration, and improve implant stability in interbody spinal fusions.


Assuntos
Angiopoietina-1/metabolismo , Fator 2 de Crescimento de Fibroblastos/metabolismo , Cetonas/farmacologia , Osteoblastos/efeitos dos fármacos , Polietilenoglicóis/farmacologia , Titânio/farmacologia , Fator A de Crescimento do Endotélio Vascular/metabolismo , Ligas/farmacologia , Benzofenonas , Materiais Biocompatíveis , Linhagem Celular , Células Cultivadas , Humanos , Osteoblastos/metabolismo , Osteoprotegerina/metabolismo , Polímeros , Fator de Crescimento Transformador beta1/metabolismo
14.
Spine J ; 12(3): 265-72, 2012 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22424980

RESUMO

BACKGROUND CONTEXT: Multiple biomaterials are clinically available to spine surgeons for performing interbody fusion. Poly-ether-ether-ketone (PEEK) is used frequently for lumbar spine interbody fusion, but alternative materials are also used, including titanium (Ti) alloys. Previously, we showed that osteoblasts exhibit a more differentiated phenotype when grown on machined or grit-blasted titanium aluminum vanadium (Ti6Al4V) alloys with micron-scale roughened surfaces than when grown on smoother Ti6Al4V surfaces or on tissue culture polystyrene (TCPS). We hypothesized that osteoblasts cultured on rough Ti alloy substrates would present a more mature osteoblast phenotype than cells cultured on PEEK, suggesting that textured Ti6Al4V implants may provide a more osteogenic surface for interbody fusion devices. PURPOSE: The aim of the present study was to compare osteoblast response to smooth Ti6Al4V (sTiAlV) and roughened Ti6Al4V (rTiAlV) with their response to PEEK with respect to differentiation and production of factors associated with osteogenesis. STUDY DESIGN: This in vitro study compared the phenotype of human MG63 osteoblast-like cells cultured on PEEK, sTiAlV, or rTiAlV surfaces and their production of bone morphogenetic proteins (BMPs). METHODS: Surface properties of PEEK, sTiAlV, and rTiAlV discs were determined. Human MG63 cells were grown on TCPS and the discs. Confluent cultures were harvested, and cell number, alkaline phosphatase-specific activity, and osteocalcin were measured as indicators of osteoblast maturation. Expression of messenger RNA (mRNA) for BMP2 and BMP4 was measured by real-time polymerase chain reaction. Levels of BMP2, BMP4, and BMP7 proteins were also measured in the conditioned media of the cell cultures. RESULTS: Although roughness measurements for sTiAlV (S(a)=0.09±0.01), PEEK (S(a)=0.43±0.07), and rTiAlV (S(a)=1.81±0.51) varied, substrates had similar contact angles, indicating comparable wettability. Cell morphology differed depending on the surface. Cells cultured on Ti6Al4V had lower cell number and increased alkaline phosphatase specific activity, osteocalcin, BMP2, BMP4, and BMP7 levels in comparison to PEEK. In particular, roughness significantly increased the mRNA levels of BMP2 and BMP4 and secreted levels of BMP4. CONCLUSIONS: These data demonstrate that rTiAlV substrates increase osteoblast maturation and produce an osteogenic environment that contains BMP2, BMP4, and BMP7. The results show that modifying surface structure is sufficient to create an osteogenic environment without addition of exogenous factors, which may induce better and faster bone during interbody fusion.


Assuntos
Proteínas Morfogenéticas Ósseas/biossíntese , Cetonas/farmacologia , Osteoblastos/citologia , Osteoblastos/metabolismo , Polietilenoglicóis/farmacologia , Titânio/farmacologia , Ligas , Benzofenonas , Materiais Biocompatíveis/farmacologia , Técnicas de Cultura de Células/métodos , Diferenciação Celular/fisiologia , Linhagem Celular , Humanos , Cetonas/química , Microscopia Confocal , Microscopia Eletrônica de Varredura , Fenótipo , Polietilenoglicóis/química , Polímeros , Reação em Cadeia da Polimerase em Tempo Real , Propriedades de Superfície , Titânio/química
15.
Spine (Phila Pa 1976) ; 27(7): E185-8, 2002 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-11923675

RESUMO

The Internet, an increasingly pervasive part of our culture, has vastly increased the rate at which information is disseminated. Unfortunately, a substantial portion of medical information on the Internet is false or misleading. Realizing this, many patients would like their physicians to help guide their online searches for medical information, but most physicians do not feel comfortable enough with the Internet to provide this service. A recent poll by Cyberdialogue (2000) found that 70% of all patients would like their physicians to recommend a health care web site for their condition, but that only 4% of patients receive such a recommendation. In recommending medical web sites, physicians need to consider the quality of the web site, the quality of the content, and especially the ethics of the site. The most important ethical standard a web site must meet is the clear separation of its editorial comment from promotional material. Patients do not have enough knowledge to distinguish unbiased information from information designed to push a product or service. There are organizations such as the Health on the Net Foundation and the E-Health Code of Ethics that have established clear quality and ethical criteria, but very few resources exist for these organizations to use in policing the sites that claim to adhere to their criteria. The National Institutes of Health recently started a consumer web site (www.medlineplus.gov) that takes web sites that adhere to their stringent criteria and places them on their web site, thus ensuring proper compliance. Patient education from sources other than face-to-face contact with a physician should be seen as an adjunct to the medical practice of physicians, and not as competition. Information is a form of therapy, and should lead to better referrals, more realistic outcome expectations, better treatment compliance, and better outcomes. As long as patients are referred to information that is unbiased, well-written, and not proprietary, their decision making should be enhanced, bringing them into the decision-making loop. This allows the patient to be much more involved with his or her care. As the medical profession changes from a "gatekeeper" model to a patient choice model, patient education will take on a much greater role.


Assuntos
Educação de Pacientes como Assunto , Doenças da Coluna Vertebral/terapia , Bioética , Humanos , Internet/normas , Relações Médico-Paciente
16.
Spine (Phila Pa 1976) ; 27(2): 220, 2002 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-11805675
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