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1.
Plast Reconstr Surg Glob Open ; 12(10): e6272, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39421678

RESUMO

Background: Septal extension grafts allow the precise elongation of the nasal septum to attain facial harmony and optimize aesthetic outcomes. In this context, septal surgery requires meticulous design to address both functional and aesthetic goals. Traditional septoplasty techniques often overlook aesthetic considerations and postoperative nasal structural stability, resulting in unresolved or recurrent deviations, nose tip drooping, and obstruction recurrences. Despite advancements in surgical techniques, achieving simultaneous septal alignment and long-term stability remains a significant challenge. Methods: This study introduces a systematic 4-step technique. The procedure encompasses caudal septum liberation, placement of the septum extension cartilage graft, positioning of an ethmoidal bone graft, and redefinition through an intermediate cartilage. Results: A retrospective analysis of outcomes involving 753 patients was conducted with a minimum follow-up of 6 months. During follow-up visits, 1.73% of cases exhibited residual columellar asymmetry, and 0.66% showed tip asymmetries. The infection rate was 0.40%, with no cases of tip drop identified. The overall satisfaction rating on the Rhinoplasty Outcomes Evaluation questionnaire at 12 months postoperative was 9.3. Conclusions: The technique provides a systematic approach to integrate functional and aesthetic objectives, emphasizing septal stability and alignment while concurrently addressing tip projection and stability. The study provides comprehensive insights into the principles, methodology, and advantages of this rhinoplasty technique. The outcomes underscore the efficacy of the technique, presenting a reliable and long-term stable solution.

2.
Aesthetic Plast Surg ; 2024 Sep 13.
Artigo em Inglês | MEDLINE | ID: mdl-39271548

RESUMO

NO LEVEL ASSIGNED: This journal requires that authors assign a level of evidence to each submission to which Evidence-Based Medicine rankings are applicable. This excludes Review Articles, Book Reviews, and manuscripts that concern Basic Science, Animal Studies, Cadaver Studies, and Experimental Studies. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors  www.springer.com/00266 .

3.
Surgery ; 176(4): 1247-1255, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39013675

RESUMO

As the life expectancy of the population continues to increase, more facial-rejuvenating procedures are sought. As the number of facelift procedures increases, it is mandatory to acknowledge, and most importantly prevent, any possible associated complications. One of the complications after rhytidectomy, and a sign of facelift, is the so-called "pixie ear deformity" or "bat ear." This is regarded as a telltale sign of a facelift procedure and appears to be identified in 5% of earlobe inset cases. The ear's location is a crucial hallmark of an aesthetically pleasing face, not only by itself but also in relation with other aesthetic units. When performing a facelift procedure, tension vectors of the rhytidectomy flap could cause alterations in ear's position and appearance: the ear loses its great mobility and becomes more fixed in its acquired position, resulting in a "stuck-on" appearance. The auricle is displaced following an anteroinferior direction, with the otobasion inferius (the most caudal anterior attachment of the earlobe to the cheek) being dislocated from its original more posterior and upper position to a new more anterior and caudal location. The displacement of the auricle is usually accompanied by distortion of the earlobe rotating forward and becoming more anterior than the rest of the ear. In recent decades, many techniques and procedures have been described to prevent and correct the pixie ear; in this review, we aim to analyze and describe them comprehensively.


Assuntos
Ritidoplastia , Humanos , Ritidoplastia/métodos , Ritidoplastia/efeitos adversos , Orelha Externa/cirurgia , Complicações Pós-Operatórias/prevenção & controle , Complicações Pós-Operatórias/etiologia , Deformidades Adquiridas da Orelha/etiologia , Deformidades Adquiridas da Orelha/prevenção & controle , Deformidades Adquiridas da Orelha/cirurgia
4.
Aesthetic Plast Surg ; 48(15): 2812-2817, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38485786

RESUMO

Rhinoplasty, a common surgical procedure for nose reshaping, demands meticulous preoperative evaluation and precise execution. When coupled with septoplasty to address medical issues stemming from a deviated nasal septum, these procedures can lead to noteworthy postoperative complications. These encompass early issues like epistaxis and hematoma, as well as long-term challenges such as scarring and aesthetic deformities. Strategies like steroids and tranexamic acid are employed to prevent and manage these complications. A contentious aspect in postoperative care is the use of nasal packing. While some argue it aids healing and hemostasis, others avoid it due to patient discomfort. This review assesses the pros and cons of postoperative nasal packing following rhinoplasty and septoplasty. A thorough literature review spanning 2000-2023 yielded 30 relevant articles from 62. Discussion reveals that nasal packing offers limited benefits in reducing bleeding, edema and ecchymosis. In conclusion, the decision to employ nasal packing in rhinoplasty and septoplasty should be made carefully, considering patient comfort and surgical context. Evidence suggests that nasal packing may not consistently provide significant advantages and could lead to adverse outcomes. Nasal splints offer similar advantages and may be considered viable alternatives. Surgeons should tailor their approach to individual patient needs, with further research needed to refine postoperative management for these procedures.Level of Evidence III This journal requires that authors assign a level of evidence to each article. For a full description of these evidence-based medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .


Assuntos
Septo Nasal , Cuidados Pós-Operatórios , Complicações Pós-Operatórias , Rinoplastia , Humanos , Rinoplastia/métodos , Rinoplastia/efeitos adversos , Septo Nasal/cirurgia , Cuidados Pós-Operatórios/métodos , Complicações Pós-Operatórias/prevenção & controle , Feminino , Masculino , Medição de Risco
5.
Aesthetic Plast Surg ; 48(8): 1522-1528, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38286900

RESUMO

Facelift surgery, also known as rhytidectomy, is a popular cosmetic procedure aimed at reversing the signs of facial aging. While facelift surgery is more commonly performed in women, an increasing number of men are seeking this procedure to maintain a youthful appearance. The long recovery period conflicts the overall primary outcome anticipated by men undergoing rhytidectomy, i.e., appear younger, youthful, and ready to reaffirm their value in the working environment. Anterior direct neck lift, blepharoplasty (upper and lower eyelid blepharoplasty), and lipofilling are three techniques that have been shown to be effective in improving facial rejuvenation outcomes in elderly male patients. However, there is little to no evidence of the safety and efficacy of these techniques when used in combination. By combining these techniques, we hypothesized that we could achieve outcomes comparable to traditional facelift surgery, but with a lower risk of complications and a shorter recovery time. We conducted a retrospective case series study of 18 male patients who underwent facial rejuvenation surgery using the combination of anterior direct neck lift, blepharoplasty (upper and lower eyelid blepharoplasty), and lipofilling at our institution between 2018 and 2021. All 18 patients completed the study, with an average follow-up of 12 months. No major complications were observed, and all patients reported a high level of satisfaction with their outcomes.Level of Evidence IV This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .


Assuntos
Blefaroplastia , Rejuvenescimento , Ritidoplastia , Envelhecimento da Pele , Humanos , Masculino , Rejuvenescimento/fisiologia , Ritidoplastia/métodos , Blefaroplastia/métodos , Pessoa de Meia-Idade , Estudos Retrospectivos , Envelhecimento da Pele/fisiologia , Idoso , Resultado do Tratamento , Satisfação do Paciente/estatística & dados numéricos , Adulto , Estética , Estudos de Coortes
7.
Aesthet Surg J ; 43(12): NP1063-NP1070, 2023 11 16.
Artigo em Inglês | MEDLINE | ID: mdl-37658866

RESUMO

BACKGROUND: Increasing adoption of implant-based breast reconstruction (IBR) has raised expectations regarding postoperative outcomes and aesthetic results. BMI has been extensively explored as a predictor of complications. This study is the first to examine complication rates in underweight subjects, and compares these rates among underweight, normal weight, overweight, and obese patients. OBJECTIVES: The aim of this study was to investigate the influence of BMI on postoperative complications and aesthetic results in IBR following mastectomy. METHODS: Retrospective analysis encompassed patients undergoing mastectomy with subsequent IBR, performed by a collaborative team of breast and plastic surgeons. Demographics, treatment specifics, and outcomes were evaluated by univariate and multivariate regression models. Significance was determined at P < .05. RESULTS: In total, 1046 IBRs were performed in 921 patients, of whom 63 had a BMI <18.5 kg/m2, 572 were normal weight, 215 were overweight, and 71 were obese. Significantly higher complication rates were observed in both obese and overweight patients compared with normal-weight patients (P < .001). Each unit increase in BMI correlated to 7% increased odds of overall complications and 13% increased odds of reconstructive failure. Underweight individuals had higher capsular contracture rates than normal-weight patients, 14.3% vs 3.65%, respectively (P = .001). In addition, aesthetic complications rates in underweight patients were higher than in normal-weight patients, 36.4% vs 25.7%, respectively (P < .05). CONCLUSIONS: This study confirmed BMI to be a strong predictor of postoperative complications and aesthetic outcomes, and demonstrates that low BMI has a significant impact on the incidence of capsular contracture and aesthetic complications.


Assuntos
Implantes de Mama , Neoplasias da Mama , Contratura , Mamoplastia , Humanos , Feminino , Mastectomia/efeitos adversos , Mastectomia/métodos , Índice de Massa Corporal , Sobrepeso/complicações , Estudos Retrospectivos , Implantes de Mama/efeitos adversos , Magreza/complicações , Magreza/epidemiologia , Mamoplastia/métodos , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/etiologia , Obesidade/complicações , Obesidade/epidemiologia , Estética , Contratura/complicações
8.
Aesthetic Plast Surg ; 47(6): 2902-2906, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37474820

RESUMO

Venous thromboembolism (VTE) is a postoperative complication experienced in all branches of surgery, including plastic surgery. Its occurrence can be lowered with adequate prophylaxis in the light of the patient's risk category and the type of surgery that will be performed. Nevertheless, thromboembolic prophylaxis is not routinely administered in plastic surgery. The prevention of VTE has gained significant attention in the past 5 years due to increased knowledge about the disease process and the alarming incidence rates. This literature review is specifically aimed at carrying out a synopsis of VTE prophylaxis trials conducted on plastic surgery patients. Antithrombotic agents have generally been avoided by plastic surgeons due to the increased risk of bleeding or hematomas; however, the prevalence of clinically important bleeding has not been found to increase with their use, as it emerges from numerous studies. VTE events can lead to increased morbidity and mortality rates, as well as a rise in healthcare costs. As it emerges from multiple studies, as a preventive measure against VTE, it is strongly advised to use mechanical prophylaxis along with low-molecular-weight heparin as the primary treatment option for plastic surgery patients who are at a greater risk. Up to date though, this practice is not commonly embraced by physicians. Preventing VTE is crucial, and measures to do so are necessary. However, there is no clear evidence to support the use of anticoagulation for plastic surgery patients, and some surgeons are hesitant to use it due to potential bleeding in extensive dissection areas.Level of Evidence III This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .


Assuntos
Procedimentos de Cirurgia Plástica , Cirurgia Plástica , Tromboembolia Venosa , Humanos , Tromboembolia Venosa/epidemiologia , Tromboembolia Venosa/etiologia , Tromboembolia Venosa/prevenção & controle , Cirurgia Plástica/efeitos adversos , Anticoagulantes/uso terapêutico , Procedimentos de Cirurgia Plástica/efeitos adversos , Heparina de Baixo Peso Molecular/uso terapêutico , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/prevenção & controle , Hemorragia/induzido quimicamente
9.
Plast Reconstr Surg Glob Open ; 11(4): e4951, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37124380

RESUMO

Flaps based on perforators of the intercostal arteries have been described for the reconstruction of defects resulting from partial mastectomies. Dynamic infrared thermography (DIRT) identifies hot spots that accurately correspond to and evaluate perforator vessels toward the skin. The new generation of portable thermal cameras has become smaller, less expensive, more sensitive, and compatible with common smartphones. One option is the FLIR ONE system (FLIR Systems, Inc., Wilsonville, OR), a smartphone-compatible thermal camera. Despite its lower resolution, compared with the larger infrared camera models, it represents a viable option for thermal skin mapping, and its compact nature allows for easy portable use. The purpose of this article is to report a case of a preoperative study with smartphone DIRT used in the preparation of an anterior intercostal artery perforator-based flap for breast reconstruction after a wide resection at the level of the right infer-internal breast region, including a skin excision. Our study documents how smartphone DIRT is a rapid, sensitive, easily accessible and cost-effective diagnostic method for the topographical identification of intercostal artery perforators. It can be used as a rescue method at any stage of the intervention if it differs from the preoperative planning. It also confirms the proven usefulness of this flap for the reconstruction of partial defects in the breast and thoracic region.

10.
Aesthetic Plast Surg ; 47(6): 2880-2888, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37069351

RESUMO

Antifibrinolytics, particularly tranexamic acid (TXA), are agents used to reduce bleeding. TXA is a synthetic reversible competitive inhibitor to the lysine receptor found on plasminogen. By reversibly binding to this site, it leads to plasminogen being unable to bind to fibrin and so prevents fibrinolysis, this stabilizes the clot and thus prevents hemorrhage. (Pekrul in Der Anaesth 70:515-521, 2021) It can be used either intravenously or topically but has never entered mainstream use in plastic surgery. (Pekrul in Der Anaesth 70:515-521, 2021) This is most likely due to understandable fears of thromboembolic events. On the other hand, the tempting benefits are reduced bleeding (perioperatively) decreased bruising and swelling, and thus increased aesthetic, important for obvious reasons. A review of the literature was done to go deeper on this issue, examining topical use in aesthetic surgery. Clear benefit was shown in the literature, it could be postulated that it would not be unwise to consider more research on topical use of TXA in certain cases, the benefits could greatly outweigh the risks. Old fears and conceptions, unsupported by the literature at the time of writing, should not hold back further research, and the benefits shown could even potentially justify the topical use of these agents in the near future. Further studies evaluating the utility of TXA in Panniculectomy and Abdominoplasty surgery should be performed especially, since only one was found which reported no significant benefit. Minor complications were present, such as minor delayed post-auricular skin healing, temporary unilateral marginal mandibular neuropraxia and increased cumulative seroma volume. These were novel findings and could warrant further investigation as well. After performing a review of the literature, it was seen that topical TXA generally adds benefit in aesthetic plastic surgery, with no particularly significant complications. We would like to bring more attention to the issue and support more studies on TXA use. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors   www.springer.com/00266 .


Assuntos
Procedimentos de Cirurgia Plástica , Cirurgia Plástica , Ácido Tranexâmico , Humanos , Cirurgia Plástica/efeitos adversos , Procedimentos de Cirurgia Plástica/efeitos adversos , Hemorragia/prevenção & controle , Estética , Plasminogênio
13.
Aesthetic Plast Surg ; 47(Suppl 1): 207-208, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-36547686

RESUMO

We read with great interest the article titled "Tuberous breast, deformities, and asymmetries: a retrospective analysis comparing fat grafting versus mastopexy and breast implants" by Gentile. In this interesting paper, the author compares results obtained in patients suffering from tuberous breast, deformities, and asymmetries treated with fat grafting (FG) with those of patients who underwent mastopexy and breast implant (M-SI). The TB reconstructive procedures aims to release the constricted base both vertically and horizontally, restore the correct nipple-inframammary fold distance, avoid the double bubble, correct ptosis and hypertrophy, and restore both volume and asymmetry. In most cases, it poses a real challenge to surgical correction through the exclusive use of only one of the surgical techniques described in the paper. We think the type of surgical procedure is determined by specific factors which must be considered by both the surgeon and the patient. We propose a classification that analyzes 3 characteristics (type of stenosis, hypoplasia, and ptosis) and identifies 8 classes of TB: this classification allows to guide the surgeon in choosing the most appropriate surgical maneuvers for each type of TB. In conclusion, we think that each case of TB, deformities, and asymmetries should be carefully studied and classified, opting for the most appropriate surgical method "tailored made" to ensure the best result for the patient. Among these techniques, M-SI and FG are two important weapons in the hands of the surgeon, who must use them wisely, knowing each indication and limits.Level of Evidence V This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .


Assuntos
Tecido Adiposo , Implantes de Mama , Mamoplastia , Mamilos , Humanos , Tecido Adiposo/cirurgia , Estudos de Coortes , Estética , Mamoplastia/métodos , Mamilos/cirurgia , Estudos Retrospectivos , Resultado do Tratamento
14.
Case Reports Plast Surg Hand Surg ; 10(1): 2290532, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38229701

RESUMO

CLOVES syndrome is a rare overgrowth disorder caused by gene mutations. This case study describes a 28-year-old woman with CLOVES syndrome who underwent multiple surgeries to achieve a positive outcome while preserving lymphovascular structures. The report underscores the importance of a multidisciplinary approach and tailored surgical interventions for managing CLOVES.

15.
Eur J Breast Health ; 18(4): 315-322, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36248756

RESUMO

Objective: Patients with triple-negative (TN) or human epidermal growth factor 2 (HER2)-enriched ipsilateral breast cancer recurrence (IBCR) seem to be excluded from a second breast-conserving surgery (BCS) under the assumption that salvage mastectomy would provide better oncological outcomes. The objective of this study was to describe the clinical features of these patients, to compare the two surgical alternatives (salvage mastectomy versus second BCS) in terms of oncological results, and to identify independent factors influencing prognosis and surgical treatment. Materials and Methods: We retrospectively reviewed all the consecutive patients with histologically confirmed TN or HER2-enriched IBCR. Disease-free survival (DFS), distant disease-free survival (DDFS), overall survival (OS), and breast cancer-specific survival (BCSS) were analyzed and compared between the two groups. Results: Eighty-five patients were affected by TN or HER2-enriched IBCR. The majority of patients (72.9%) were treated with salvage mastectomy. There was no significant difference in terms of DFS between patients receiving a second BCS or mastectomy (p = 0.596). However, patients undergoing a second BCS had significantly better DDFS, OS and BCSS compared to mastectomy (p = 0.009; p = 0.002; p = 0.001, respectively). Tumor dimension <16 mm was found to significantly increase the probability of receiving a second BCS and positively affects recurrence and survival outcomes. Salvage mastectomy represents an independent poor prognostic factor for OS and BCSS. Conclusion: Salvage mastectomy is not always necessary and it does not seem to increase survival compared to a second BCS. In patients with small aggressive subtypes of IBCR, a second conservative approach can still be evaluated and offered, presenting acceptable loco-regional control and survival.

16.
J Food Sci ; 87(10): 4465-4475, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36120916

RESUMO

Ochratoxin A (OTA) is a mycotoxin produced by several species of Aspergillus and Penicillium and commonly detected in a wide range of foodstuffs. The purpose of this work was to monitor the presence of OTA in cheeses and pork meat products. A simple and accurate "dilute and shoot" method with no need of immunoaffinity column and isotopic labeled internal standard, by liquid chromatography-tandem mass spectrometry, was validated in accordance with the criteria set out in Commission Regulation (EC) No. 401/2006. The method showed good linearity in solvent and in matrix (R2  ≥ 0.995), limit of detection was 0.2 µg/kg for cheese and 0.3 µg/kg for pork meat products, limit of quantification was fixed at 1 µg/kg, and recovery was estimated at two different concentration levels (1 and 5 µg/kg) and ranged from 75% to 101%. The interday and intraday laboratory precisions were lower than 7%. The matrix effect, the recovery of the extraction process, and the overall process efficiency were evaluated. No significant ME was observed in the two matrices considered. This method was applied to the analysis of 75 samples, coming from official controls implemented by the Lazio Region (Central Italy). In one sample of dry-cured ham, the concentration found (69.3 µg/kg) was well above the guidance value recommended by the Italian Ministry of Health (1 µg/kg). These data together with the detection of OTA in three grated cheeses suggest the importance of monitoring these products. Considering the high dietary intake of these matrices, especially among vulnerable populations, further research should be devoted to estimate exposure and risk assessment for OTA.


Assuntos
Queijo , Produtos da Carne , Micotoxinas , Ocratoxinas , Carne de Porco , Carne Vermelha , Animais , Suínos , Produtos da Carne/análise , Espectrometria de Massas em Tandem/métodos , Queijo/análise , Carne Vermelha/análise , Análise de Alimentos/métodos , Ocratoxinas/análise , Cromatografia Líquida/métodos , Micotoxinas/análise , Solventes , Cromatografia Líquida de Alta Pressão/métodos , Contaminação de Alimentos/análise
17.
Front Surg ; 9: 935410, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35923444

RESUMO

Background: The increased incidence of conservative mastectomy operations (nipple- and skin- sparing) has increased the frequency of immediate breast reconstructions (IBR). In order to guarantee patients the best possible aesthetic outcome, the least chance of complications and moreover, the least postoperative pain, the technique with prepectoral prosthetic pocket was recently reconsidered with the use of ADM. This is the first study using Fortiva® in prepectoral breast reconstruction, and it compares the outcomes of three different patient populations (undergoing retromuscular, prepectoral and prepectoral reconstruction with ADM). The authors suggest that prepectoral breast reconstruction with ADM may bring benefits compared to the current standard technique (retromuscular) as well as compared to the prepectoral reconstruction without ADM. Methods: Retrospective data analysis of patients who underwent mastectomy followed by immediate breast reconstruction with silicone implants (DTI), performed by a team of breast surgeons and plastic surgeons. Logistic factor regressions were performed in order to investigate the effects of the three different intervention techniques on the incidence of complications. Fisher's exact test was used to analyze the differences in the occurrence of each complication. Mann Whitney test was used to compare the averages of referred pain. A p value <0.05 was considered significant. Results: A total of 67 patients underwent DTI reconstruction, of which 43 with retromuscular prosthesis, 13 prepectoral and 11 prepectoral with ADM. We found a significantly lower incidence of surgical complications with ADM, exclusively in comparison with retromuscular reconstruction (p = 0.028). It emerges prepectoral reconstruction with ADM involves significantly less visibility of the implant than both the prepectoral surgery without ADM (p = 0.013) and the retromuscular technique (p = 0.029). Finally, postoperative pain referred at twelfth month is significantly less relevant in the group with prepectoral prosthesis and ADM, both in the group with retromuscular (p < 0.001) and prepectoral without ADM (p = 0.001). Conclusions: This study demonstrates that immediate prepectoral breast reconstruction with ADM is a safe and reliable technique, able to exceed some type of limits imposed by prepectoral reconstruction. Moreover, it provides benefits if compared to the current standard technique. In the future, this technique could also be added to it, after a proper selection of patients in pre- and intraoperative time.

19.
J Phys Chem A ; 118(31): 5801-7, 2014 Aug 07.
Artigo em Inglês | MEDLINE | ID: mdl-24467179

RESUMO

Silica-based materials find applications as excipients and, particularly for those of mesoporous nature, as drug delivery agents for pharmaceutical formulations. Their performance can be crucially affected by water moisture, as it can modify the behavior of these formulations, by limiting their shelf life. Here we describe the role of water microsolvation on the features of ibuprofen adsorbed on a model of amorphous silica surface by means of density functional theory (DFT) simulations. Starting from the results of the simulation of ibuprofen in interaction with a dry hydrophobic amorphous silica surface, a limited number of water molecules has been added to study the configurational landscape of the microsolvated system. Structural and energetics properties, as well as the role of dispersive forces, have been investigated. Our simulations have revealed that the silica surface exhibits a higher affinity for water than for ibuprofen, even if several structures coexist at room temperature, with an active competition of ibuprofen and water for the exposed surface silanols. Dispersive interactions play a key role in this system, as pure DFT fails to correctly describe its potential energy surface. Indeed, van der Waals forces are the leading contribution to adsorption, independently of whether the drug is hydrogen-bonded directly to the surface or via water molecules.


Assuntos
Ibuprofeno/química , Dióxido de Silício/química , Água/química , Adsorção , Simulação por Computador , Ligação de Hidrogênio , Interações Hidrofóbicas e Hidrofílicas , Microfluídica , Modelos Químicos , Solventes/química , Propriedades de Superfície
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