S. Ferrari

University Hospital of Parma, Parma, Emilia-Romagna, Italy

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Publications (99)83.02 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Background Facial animation surgery with neuromuscular transplants has become a standard procedure for the treatment of facial palsies. However, the forehead, periocular complex, nasal base area, and inferior lip are “secondary” sites that also need to be considered in the complete rehabilitation of a flaccid facial palsy. Methods A total of 136 ancillary procedures were performed in 49 patients between 2003 and 2013, and consisted of eyebrow suspensions (11), upper eyelid loading with a platinum chain (39), inferior palpebral suspension with fascia lata (22), nasal base suspension with fascia lata (26), and botulinum toxin injection (38). Results Cosmetic results were good and excellent in 30.7% and 63.2% of the procedures, respectively. Functionally, periocular complex rehabilitation and nasal base suspension leaded to excellent improvements in function in 87.2% and 73.1% of the patients, respectively. Conclusions The use of ancillary procedures can improve the functional and esthetic results of facial animation surgery. Each author disclose any commercial associations or financial disclosures that might pose or create a conflict of interest with information presented in any submitted manuscript.
    Journal of Oral and Maxillofacial Surgery 08/2014; · 1.28 Impact Factor
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    ABSTRACT: The masseteric nerve has many advantages including low morbidity, its proximity to the facial nerve, the strong motor impulse, its reliability, and the fast reinnervation that is achievable in most patients. Reinnervation of a neuromuscular transplant is the main indication for its use, but it has been used for the treatment of recent facial palsies with satisfactory results. We have retrospectively evaluated 60 patients who had facial animation procedures using the masseteric nerve during the last 10 years. The patients included those with recent, and established or congenital, unilateral and bilateral palsies. The masseteric nerve was used for coaptation of the facial nerve either alone or in association with crossfacial nerve grafting, or for the reinnervation of gracilis neuromuscular transplants. Reinnervation was successful in all cases, the mean (range) time being 4 (2-5) months for facial nerve coaptation and 4 (3-7) months for neuromuscular transplants. Cosmesis was evaluated (moderate, n=10, good, n=30, and excellent, n=20) as was functional outcome (no case of impairment of masticatory function, all patients able to smile, and achievement of a smile independent from biting). The masseteric nerve has many uses, including in both recent, and established or congenital, cases. In some conditions it is the first line of treatment. The combination of combined techniques gives excellent results in unilateral palsies and should therefore be considered a valid option.
    British Journal of Oral and Maxillofacial Surgery 01/2014; · 2.72 Impact Factor
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    ABSTRACT: Background The submental island flap is an axial pattern skin flap first described by Martin et al. in 1993. When used to reconstruct skin defects it matches the recipient site in terms of color, texture and thickness. One of the main limitations to its application is the arc of the pedicle allowing coverage of only the lower two thirds of the face. Methods A retrospective review was performed of all patients who had had a submental island flap reconstruction at the Operative Unit of Maxillo-Facial Surgery of the University Hospital of Parma, Italy, between 2001 and 2011. The Authors focused on the surgical technique adopted, the clinical indications and the results obtained. They analysed the different ways to elongate the pedicle and discuss their thoughts on the choice of reconstruction. A flowchart was created to help in the decisional process. Results Between 2001 and 2011 the submental island flap was used to reconstruct head and neck defects in 22 patients. Thirteen patients had defects of the oral cavity; the remaing 9 patients had skin defects involving the pre-auricular region, the temporal area and the peri-nasal cheek skin. No major complications occurred and in one case a partial necrosis of the distal portion of the flap was observed. Five patients underwent surgical revision involving intraoral flap debulking 6 to 10 months after the primary procedure. Discussion and Conclusions The techniques to elongate the pedicle used and described were: additional dissection of the pedicle, Y-V procedure, reverse flow flap, section of facial vein and microvascular anastomosis. Their choice is mainly conditioned by the site of the defect.
    Journal of Cranio-Maxillofacial Surgery 01/2014; · 1.61 Impact Factor
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    ABSTRACT: Background. Mandibular resection is the mainstay in the treatment of several pathologies involving the jaw. When benign lesions are approached, a limited exposure and less invasive access considering the cosmetic outcome is desirable to reduce morbidity and increase patient's quality of life after surgery. Face-lift approach is widely used for rhytidectomy, parotidectomy, and facial animation procedures, while its use for mandibular resection and reconstruction is not described yet. Methods. Six patients underwent mandibular resection and reconstruction with free flaps or bone grafts via face-lift approach were retrospectively evaluated with regards to function and cosmesis. Results. No impairment of occlusion or facial nerve occurred, mouth opening was normal in 4 patient and partially limited in 2. Cosmesis was assessed as excellent by 3 patients and good in 3. Conclusions. Face-lift approach is a valid option for resecting and reconstructing benign lesions involving the mandibular ramus, angle, and posterior body. Head Neck, 2013.
    Head & Neck 08/2013; · 2.83 Impact Factor
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    ABSTRACT: The authors' experience of the selective deep lobe parotidectomy for the treatment of pleomorphic adenomas of the deep parotid lobe is presented. A retrospective analysis of 11 patients treated between 1997 and 2010 was performed; seven were males and four were females, ranging in age from 35 to 51 years. Parameters evaluated included facial nerve weakness, the occurrence of Frey's syndrome, cosmetic outcome, and recurrence. Follow-up ranged from 18 months to 11 years. No major complications, permanent facial nerve weakness, or Frey's syndrome occurred. Four patients developed temporary facial nerve impairments that lasted between 2 and 6 weeks, and two developed a sialocele that healed in 9 days in one case and 12 days in the other. The overall cosmetic assessment was excellent in eight patients, good in two, and satisfactory in the remaining one. No recurrences occurred. The selective deep lobe parotidectomy can be considered an effective technique for the management of deep parotid lobe pleomorphic adenomas. The major advantages of this procedure include a reduction in complications such as facial nerve impairments and Frey's syndrome, and an improved cosmetic outcome.
    International Journal of Oral and Maxillofacial Surgery 05/2013; · 1.52 Impact Factor
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    ABSTRACT: The modeling of solar radiation for forecasting its availability is a key tool for managing photovoltaic (PV) plants and, hence, is of primary importance for energy production in a smart grid scenario. However, the variability of the weather phenomena is an unavoidable obstacle in the prediction of the energy produced by the solar radiation conversion. The use of the data collected in the past can be useful to capture the daily and seasonal variability, while measurement of the recent past can be exploited to provide a short term prediction. It is well known that a good measurement of the solar radiation requires not only a high class radiometer but even a correct management of the instrument. In order to reduce the cost related to the management of the monitoring apparatus, a solution could be to evaluate the PV plant performance using data collected by public weather station installed near the plant. In this paper, two computational intelligence models are challenged; two different ground global horizontal radiation dataset have been used: the first one is based on the data collected by a public weather station located in a site different to that one of the plant, the second one, used to validate the results, is based on data collected by a local station.
    Instrumentation and Measurement Technology Conference (I2MTC), 2013 IEEE International; 01/2013
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    ABSTRACT: The solar panel, which transforms the energy carried by the light in electricity, is a reliable component of a photovoltaic (PV) system, but its efficiency depends on several factors, such as its orientation, its working temperature, and its tidiness. Since maintenance is an expensive activity, a careful evaluation of the degradation of the panel and the resulting production loss has to be carried out. Besides, an accurate estimation of the potential production with respect to the weather condition requires expensive instruments and skilled operators. In this paper, we propose an alternative approach based on the prediction of the potential production based on a public weather station in the nearby of the considered plant. Several computational intelligence paradigms as well as several prediction setups are here challenged and compared.
    Environmental Energy and Structural Monitoring Systems (EESMS), 2013 IEEE Workshop on; 01/2013
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    ABSTRACT: It is well known that the knowledge of solar radiation represents a key for managing photovoltaic (PV) plants. In a smart grid scenario to predict the energy production can be considered a milestone. However, the unsteadiness of the weather phenomena makes the prediction of the energy produced by the solar radiation conversion process a difficult task. Starting from this considerations, the use of the data collected in the past represents only the first step in order to evaluate the variability both in a daily and seasonal fashion. In order to have a stronger dataset a multi-year observation is mandatory. In this paper, several autoregressive models are challenged on a two-year ground global horizontal radiation dataset measured in Milan, and the results are compared with those of simple predictor.
    Instrumentation and Measurement Technology Conference (I2MTC), 2013 IEEE International; 01/2013
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    ABSTRACT: Support vector regression (SVR) is based on a linear combination of displaced replicas of the same function, called a kernel. When the function to be approximated is nonstationary, the single kernel approach may be ineffective, as it is not able to follow the variations in the frequency content in the different regions of the input space. The hierarchical support vector regression (HSVR) model presented here aims to provide a good solution also in these cases. HSVR consists of a set of hierarchical layers, each containing a standard SVR with Gaussian kernel at a given scale. Decreasing the scale layer by layer, details are incorporated inside the regression function. HSVR has been widely applied to noisy synthetic and real datasets and it has shown the ability in denoising the original data, obtaining an effective multiscale reconstruction of better quality than that obtained by standard SVR. Results also compare favorably with multikernel approaches. Furthermore, tuning the SVR configuration parameters is strongly simplified in the HSVR model.
    IEEE transactions on neural networks and learning systems 09/2012; 23(9):1448-60. · 4.37 Impact Factor
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    ABSTRACT: Planning, managing, and operating power grids using mixed traditional and renewable energy sources requires a reliable forecasting of the contribution of the renewable sources, due to their variable nature. Besides, the short-term prediction of the climatic conditions finds application in other fields (e.g., Climate Sensitive Buildings). In particular, this work is related to the solar radiation forecasting, that affects the photovoltaic production. The variability of the weather phenomena and climate features make the prediction a difficult task. In fact, the amount of solar radiation that reaches a particular geographical location depends not only by its latitude, but also by the geographical characteristics of the region that can create local climate conditions. In order to capture such variability, the data collected in the past can be used. Several sources can provide the data needed for the prediction (satellite and ground images, numerical weather predictions, ground measurement stations) with different resolution in time and space. In this paper, a new learning paradigm, the Extreme Learning Machine, is used to train a neural network model for the prediction of the solar illuminance. The neural networks are challenged on a two-year ground solar illuminance dataset measured in Milan, and the results are compared with those of simple predictors and results in literature.
    IEEE Workshop on Environmental, Energy and Structural Monitoring System; 09/2012
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    ABSTRACT: PURPOSE: To evaluate the clinical outcome and the aesthetic and functional results of implant rehabilitation of fibula free-flap reconstructed mandibles. MATERIALS AND METHODS: The charts of patients who underwent mandibular reconstruction with fibula free flap and implant prosthodontic rehabilitation between 1998 and 2008 at the Operative Unit of Maxillofacial Surgery of Parma, Italy, were reviewed. In the study the estimated survival rates of implants placed in reconstructed mandibles we identified the prognostic factors and evaluated the functional outcomes. RESULTS: Fourteen patients with a mean age of 50 years (range 15-63 years), were included in the study. A total of 62 implants were positioned. Complications occurred in 7 cases, an improvement in function and aesthetics was reported by the majority of patients. CONCLUSIONS: A high survival rate for implants placed in fibula free-flap reconstructed mandibles was observed. Although different factors were believed to be associated with a poorer prognosis (radiotherapy, composite defects, etc.) no statistically significance was found, showing no absolute contraindications to implant placement.
    Journal of cranio-maxillo-facial surgery: official publication of the European Association for Cranio-Maxillo-Facial Surgery 08/2012; · 1.25 Impact Factor
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    ABSTRACT: INTRODUCTION: Free flaps represent the first reconstructive option for many head and neck defects. The increasing life expectancy of the population results in increasing numbers of ageing patients facing complex reconstructive surgery. In this study we evaluated our experience with free-flap transfers in older patients, analysing the post-operative reconstructive and systemic complications. MATERIALS AND METHODS: Between 2000 and 2009, 360 patients underwent free flap reconstruction of defects resulting from the treatment of head and neck tumours at the Operative Unit of Maxillofacial Surgery, University - Hospital of Parma, Italy. Fifty-five patients (15.3%) were more than 75 years old at the time of treatment. RESULTS: At the end of the follow-up successful free-flap transfer was achieved in 360 of the 373 flaps harvested (96.5%). The overall reconstructive complication rate was 31.4%, (31.8% in the younger group and 29.1% in the remaining patients). Medical complications were observed in 29.2% of cases (less than 75 years: 28.8%; more than 75 years: 30.9%). The ASA status was associated with a statistically significantly higher incidence of complications within patients less than 75 years old (p < 0.0001). DISCUSSION AND CONCLUSIONS: The results of this study, in agreement with previous studies, provide evidence that free-tissue transfer may be performed in ageing patients with a high degree of technical success. The chronologic age cannot be considered an sappropriate criterion in the reconstructive decision. On the contrary, a careful selection of the patients based on comorbidities and general conditions (ASA status) is of primary importance in reducing post-operative complications and to improving the results of surgery.
    Journal of cranio-maxillo-facial surgery: official publication of the European Association for Cranio-Maxillo-Facial Surgery 08/2012; · 1.25 Impact Factor
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    ABSTRACT: Publisher’s description: The book presents methods to model 3D objects in an incremental way in order to capture more finer details at each step. The configuration of the model parameters, the rationale and solutions are described and discussed in detail. The modeling starts from data captured by 3D digitizers and makes the process even more clear and engaging. Innovative approaches, based on two popular machine learning paradigms, namely radial basis functions and the support vector machines, are also introduced. These paradigms are extended to a multi-scale incremental structure, based on a hierarchical scheme. The resulting approaches allow to achieve high accuracy with limited computational complexity, and are appropriate for online, real-time operation. Applications can be found in any domain in which regression is required. The book is designed as a secondary text book or reference for advanced-level students and researchers in computer science. This book also targets practitioners working in computer vision or machine learning related fields.
    01/2012; Springer-Verlag New York, LLC., ISBN: 1461456312
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    ABSTRACT: A reliable forecast of renewable energies production, like solar radiation, is required for planning, managing, and operating power grids. Besides, the short-term prediction of the climatic conditions is very useful for many other purposes (e.g., for Climate Sensitive Buildings). Data for the prediction can be produced by several sources (satellite and ground images, numerical weather predictions, ground measurement stations) with different resolution in time and space. However, the unsteadiness of the weather phenomena and the variability of the climate make the prediction a difficult task, although the data collected in the past can be used to capture the daily and seasonal variability. In this paper, several autoregressive models (namely, AR, ARMA, and ARTMA) are challenged on a two-year ground solar illuminance dataset measured in Milan, and the results are compared with those of simple predictor and results in literature.
    Environmental Energy and Structural Monitoring Systems (EESMS), 2012 IEEE Workshop on; 01/2012
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    ABSTRACT: The buccinator musculomucosal flaps are actually considered the main reconstructive option for small-moderate defects of the oral mucosa. In this paper we present our experience with the posteriorly based buccinator musculomucosal flap. A retrospective review was performed of all patients who had had a Bozola flap reconstruction at the Operative Unit of Maxillo-Facial Surgery of Parma, Italy, between 2003 and 2010. The Bozola flap was used in 19 patients. In most cases they had defects of the palate (n=12). All flaps were harvested successfully and no major complications occurred. Minor complications were observed in two cases. At the end of the follow up all patients returned to a normal diet without alterations of speech and swallowing. We consider the Bozola flap the first choice for the reconstruction of defects involving the palate, the cheek and the postero-lateral tongue and floor of the mouth.
    Oral Oncology 12/2011; 48(4):379-82. · 2.70 Impact Factor
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    ABSTRACT: The microneurovascular transfer of a free-muscle transplant is the procedure of choice for facial animation, It is characterized by low morbidity in both adult and paediatric patients. In spite of the improvements in microsurgical techniques, failures due to absent revascularization or reinnervation of the transplanted muscle or infections causing flap necrosis are observed. We propose a second surgical procedure based on the gracilis muscle transplant reinnervated by the masseteric nerve as a solution for these cases. We analyzed and report on two patients treated in our department after the failure of a previous cross-facial nerve graft and free muscle transplant. They were treated with a new facial reanimation using the contralateral gracilis muscle and the masseteric nerve as the donor nerve. We did not observe any postoperative complications, and all of the flaps survived. Reinnervation and contraction of the muscle appeared 3-4 months postoperatively, with good functional and aesthetic results. This technique is a one-step procedure characterized by reliable flap harvesting, low donor site morbidity and good activity of the masseteric nerve. We consider it as a good option for treatment of facial animation failures.
    Journal of cranio-maxillo-facial surgery: official publication of the European Association for Cranio-Maxillo-Facial Surgery 04/2011; 40(2):185-9. · 1.25 Impact Factor
  • International Journal of Oral and Maxillofacial Surgery - INT J ORAL MAXILLOFAC SURG. 01/2011; 40(10):1042-1042.
  • F Bellocchio, S Ferrari
    01/2011: chapter 3D Scanner, State of the Art: pages 451-470; IGI Global.
  • VECIMS; 01/2011
  • Source
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    ABSTRACT: In a scenario where renewable energies will play a foreground role, a reliable forecast of the energy production of such sources, like solar radiation, is a requirement for managing smart grids. However, the ability to predict the possibility to produce sustainable energy in different climatic conditions can be very useful for many other purposes (e.g., for Climate Sensitive Buildings). This is particularly true when working with climatic data that are, as a matter of fact, highly unsteady. Nevertheless, the use of data collected in the past can help to face the daily and seasonal variability. An algorithm for illuminance prediction based on Support Vector Regression (SVR) is here proposed and the results are presented and discussed.
    Environmental Energy and Structural Monitoring Systems (EESMS), 2011 IEEE Workshop on; 01/2011

Publication Stats

576 Citations
83.02 Total Impact Points

Institutions

  • 1997–2014
    • University Hospital of Parma
      Parma, Emilia-Romagna, Italy
  • 1996–2014
    • Università degli studi di Parma
      Parma, Emilia-Romagna, Italy
  • 2002–2010
    • University of Milan
      • Department of Computer Science
      Milano, Lombardy, Italy
  • 1999–2001
    • Politecnico di Milano
      • Department of Electrical Engineering
      Milano, Lombardy, Italy