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surgical materials

Sheng Yan, Hangyan Shi, Da Chen, Jincai Guo, Yi Sun, Sufan Wu
The reconstruction of large full-thickness scalp defects remains a surgical challenge, especially when the skull is exposed completely without periosteum. Surgical technique options for wound coverage have included tissue expansion, skin grafting, local or regional flaps, and microvascular free tissue transfer. In recent years, some authors have reported to use biological material as an alternative for repairing complex wounds. The authors report the successful reconstruction of a large defect with bare skull in bilateral temporal regions of a 3-year-old child...
March 14, 2018: Journal of Craniofacial Surgery
S-M Lee, K Gordon, R McMillan, F Crystal, P Acher
Introduction Transurethral resection of the prostate has remained the most common operation for bladder outlet obstruction in the UK, but it is associated with potential morbidity and median two-day length of hospital stay. Holmium laser enucleation of the prostate (HoLEP) provides an alternative procedure. Provision of day-case HoLEP would improve patient care through increased efficiency. We assessed the feasibility and safety of day-case HoLEP and examined predictive factors for increased length of hospital stay...
March 15, 2018: Annals of the Royal College of Surgeons of England
S P Paul
Objective There remains confusion between Langer's lines and wrinkle lines with respect to the optimal orientation of elliptical excisions on the trunk. This study sought to determine the directions of wound closure that would result in least wound tension after skin lesion excisions. Materials and methods Some 1181 consecutive skin lesion excisions were investigated (age range 13-95 years, median 64 years) using a tensiometer to determine directions of least wound tension. These lines were mapped. Skin tension measurements were taken during the procedure and analysed...
March 15, 2018: Annals of the Royal College of Surgeons of England
L Prana, S Baijoob, B Rampersad
Introduction Intussuception remains one of the most common surgical abdominal emergencies in the paediatric population. The aim of this study was first to re-evaluate our non-operative reduction rate of intussusception using multiple interval barium enemas and second to investigate or discuss an audit cycle, providing evidence and validating the modification of clinical practice. Materials and methods This five-year retrospective study performed at one of two institutions at which a paediatric surgical service is offered...
March 15, 2018: Annals of the Royal College of Surgeons of England
Marius Georg Kaschner, Julian Caspers, Christian Rubbert, Raul Lande, Bastian Kraus, John-Ih Lee, Michael Gliem, Sebastian Jander, Bernd Turowski
Introduction While effectiveness of mechanical thrombectomy (MTE) in M1 segment occlusion is approved for patients with severe impairment, there is a lack of evidence for a potential benefit of MTE in patients with minor to moderate symptoms. The purpose of this study was to evaluate neurological outcome and occurrence of periprocedural complications after MTE in patients with low National Institutes of Health Stroke Scale (NIHSS) scores. Materials and methods A retrospective analysis of 1081 consecutive patients with anterior circulation ischemic stroke due to M1 occlusion detected by computed tomography angiography and treated with MTE at our hospital between February 2012 and November 2017 was performed...
January 1, 2018: Interventional Neuroradiology
Wataro Tsuruta, Tetsuya Yamamoto, Go Ikeda, Masayuki Sato, Yoshiro Ito, Tomoji Takigawa, Aiki Marushima, Yasunobu Nakai, Yuji Matsumaru, Akira Matsumura
BACKGROUND: Endovascular surgery for vertebral artery dissections (VADs) carries the risk of spinal cord infarction (SCI). Although SCI in the region of the anterior spinal artery (ASA) has been reported, SCI in the region of the posterior spinal artery (PSA) is rare. OBJECTIVE: To investigate PSA infarction after endovascular surgery for VAD. METHODS: Infarction in the region of the PSA after endovascular surgery for VADs carried out in consecutive 21 cases was investigated...
March 9, 2018: Operative Neurosurgery (Hagerstown, Md.)
Parker W Lee, Jonathan K Pokorski
Injectable or implantable poly(lactic-co-glycolic acid) (PLGA) devices for the sustained delivery of proteins have been widely studied and utilized to overcome the necessity of repeated administrations for therapeutic proteins due to poor pharmacokinetic profiles of macromolecular therapies. These devices can come in the form of microparticles, implants, or patches depending on the disease state and route of administration. Furthermore, the release rate can be tuned from weeks to months by controlling the polymer composition, geometry of the device, or introducing additives during device fabrication...
March 13, 2018: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
Ahmed Y Gamal, Khaled A Abdel-Ghaffar, Mohamed G Zouair, Mohamed H Salama, Mahmoud T El Destawy
BACKGROUND: Since it is important to establish and maintain a firm blood clot to the surrounding tissues within the intrabony lesion; we have to investigate the potentials of different materials in resisting clot retraction that disrupt clot adhesion to the root surface. This study was designed to measure the gap distance created by clot retraction within the defect following intrabony defects grafting with and without root surface EDTA etching. METHODS: Eight mongrel dogs with surgically created acute-chronic bilateral mandibular interproximal intrabony defects in the premolar-molar areas were enrolled in this study (total 8 defects per dog)...
March 14, 2018: Journal of Periodontology
Agata Joanna Ordon, Marcin Kozakiewicz, Michal Wilczynski, Piotr Loba
INTRODUCTION: Up to 35% of orbital floor fractures extend to the medial wall. This results in restriction of both abduction and adduction, leading to horizontal diplopia. The greater the defect, the more pronounced the enophthalmos. AIM OF THE STUDY: The aim of the study was to determine the influence of concomitant medial wall defects on enophthalmos and diplopia, and the influence of intraoperative revision on the results of surgical reconstruction in patients with orbital floor fracture...
February 3, 2018: Journal of Cranio-maxillo-facial Surgery
Guei-Hua Hu, Stuart J Froum, Abdullah Alodadi, Fuyuki Nose, Yung-Cheng Paul Yu, Takanori Suzuki, Sang-Choon Cho
This paper introduces a three-stage split-crest (TSSC) technique for horizontal ridge augmentation in the atrophic posterior mandible. The first stage consists of splitting the ridge. Following a 3- to 4-week healing interval, the second stage consists of expansion of the cortical plate (without elevating the periosteum) and placement of a bone replacement graft material. After 3 to 4 months of healing, the implants are placed. The advantages of this three-stage technique are increased vascularization to the surgical area, a decrease in procedure complications, and improved implant survival rates...
March 13, 2018: International Journal of Periodontics & Restorative Dentistry
Shin-Ichi Kanemaru, Rie Kanai, Misaki Yoshida, Yuji Kitada, Kaoru Omae, Shigeru Hirano
OBJECTIVE: To apply regenerative treatment for tympanic membrane (TM) perforation to patients with severe calcification of the TM, cholesteatomas, or tumors localized to the tympanic cavity. STUDY DESIGN: Controlled clinical pilot study. SETTING: General hospitals. PATIENTS: Forty-five patients (age: 8-85; M = 19, F = 26) were selected from patients with or without TM perforation for the regenerative treatment...
April 2018: Otology & Neurotology
Nanda Kishore Sahoo, Kapil Tomar, Ankur Thakral, N Mohan Rangan
Cranioplasty is a time-honoured surgical procedure to restore the calvarial form and function that is associated with a relatively high complication rate. The present article analyzed various complications and reviewed the complications based on study of the relevant research in the craniofacial literature. Complications were broadly divided into 2 groups, intraoperative and postoperative, for ease of understanding. The etiological factors, local and systemic condition of the patient, prevention, and management of various complications were widely discussed...
March 12, 2018: Journal of Craniofacial Surgery
Hui Qu, Bao-Dong Xie, Jian Wu, Bo Lv, Jun-Bo Chuai, Jian-Zhong Li, Jun Cai, Hua Wu, Shu-Lin Jiang, Xiao-Ping Leng, Kai Kang
Background: Engineered heart tissues (EHTs) present a promising alternative to current materials for surgical ventricular restoration (SVR); however, the clinical application remains limited by inadequate vascularization postimplantation. Moreover, a suitable and economic animal model for primary screening is another important issue. Methods: Recently, we used 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride chemistry (EDC) to initiate a strengthened, cytokine-conjugated collagenous platform with a controlled degradation speed...
2018: Stem Cells International
Nihui Zhang, Ruijuan Yao, Jianglong Guo, Jing He, Guolong Meng, Fang Wu
Chitosan as a natural cationic polysaccharide has drawn wide interests as surface modification materials in orthopedic applications, with the potential to achieve combined osteogenic, antimicrobial and haemostatic functions. The cationicity of chitosan has been reported to play an important role in modifying the osteoblastic cell responses and the antibacterial activities, while its effect on the haemostatic properties has been rarely studied. To this aim, we prepared carboxymethyl chitosan hydrogels with different cationicity through crosslinking with different concentrations of genipin (1%, 2...
February 25, 2018: Colloids and Surfaces. B, Biointerfaces
Miusi Shi, Ruiwen Yang, Qin Li, Kangle Lv, Richard J Miron, Jie Sun, Mei Li, Yufeng Zhang
Since the discovery of osteoinduction in the early 20th century, innovative biomaterials with osteoinductive potential have emerged as candidates for bone repair. Recently, artificial protocell models have demonstrated great potential for tissue regeneration. Herein, we developed artificial bioactive proto-osteocells by self-assembly of biodegradable biphasic-phosphate particles in the form of aqueous-bone morphogenetic protein 2 (BMP2)-containing pickering emulsions in corn oil to fulfill the release of BMP2 with controlled and local efficacy...
March 12, 2018: ACS Applied Materials & Interfaces
Shigeto Koyama, Hiroyasu Kanetaka, Yoshinori Sagehashi, Keiichi Sasaki, Naoko Sato
PURPOSE: Patients treated with maxillofacial prosthetics often experience emotional problems because of the remaining facial skin concavity such as a surgical scar. In such cases, cosmetic treatment can potentially correct their skin tone imperfections and deformities. This study aimed to evaluate the clinical availability of novel cosmetics-based material for craniofacial small concavity by initiating a cosmetic treatment in a preliminary case. METHODS: Eighteen patients with aesthetic problems such as craniofacial deformities, small defects, and concavities on their faces underwent cosmetic treatment that was performed by makeup practitioners...
March 8, 2018: Journal of Prosthodontic Research
Samir Sorour Sorour, Nasser Nagieb Mohamed, Magdy M Abdel Fattah, Mohammad El-Sayed Abd Elbary, Mohammad Waheed El-Anwar
BACKGROUND: Canal wall down (CWD) mastoidectomy has many drawbacks including chronic otorrhea, granulations, dizziness on exposure to cold or hot water and tendency of debris accumulation in the mastoid cavity demanding periodic cleaning. Many of these problems can be solved by reconstruction of the posterior meatal wall (PMW). OBJECTIVES: To assess the results of PMW reconstruction after CWD mastoidectomy for cholesteatoma using bioactive glass (BAG) that is fabricated and built up intraoperatively...
March 6, 2018: American Journal of Otolaryngology
Raffaele Pesavento, Paolo Prandoni
Chronic thromboembolic pulmonary hypertension (CTEPH) is an uncommon and late complication of pulmonary embolism resulting from misguided remodelling of residual pulmonary thromboembolic material and small-vessel arteriopathy. CTEPH is the only form of pulmonary hypertension (PH) potentially curable by pulmonary endarterectomy (PEA). Unfortunately, several patients have either an unacceptable risk-benefit ratio for undergoing the surgical intervention or develop persistent PH after PEA. Novel medical and endovascular therapies can be considered for them...
March 2, 2018: Thrombosis Research
Jianhui Wu, Xiuyun Tian, Bonan Liu, Chengpeng Li, Chunyi Hao
BACKGROUND Solid pseudopapillary neoplasms (SPNs) of the pancreas may present widespread peritoneal metastases, but the treatment of this malignancy has not been well described and requires further investigation. MATERIAL AND METHODS Four cases of SPN with significant peritoneal metastases in our department were operated and retrospectively summarized after long-term follow-up. Eight more cases of peritoneal metastatic SPN from the PubMed database were also included in the analysis. RESULTS Peritoneal metastases of SPNs have different gross features...
March 10, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Mahdieh Khodaei, Doug Hill, Rui Zheng, Lawrence H Le, Edmond H M Lou
PURPOSE: This study aimed to determine the intra- and inter-rater reliabilities of spinal flexibility measurements using ultrasound imaging on non-surgical candidates with adolescent idiopathic scoliosis (AIS). METHODS: Twenty-eight consecutive consented AIS subjects (25 F; 3 M) were recruited; 24 subjects' data were used for analysis. This study explored curve magnitude differences between standing, prone and voluntary maximum side-bending postures to assess the reliability of spinal flexibility (SF)...
March 9, 2018: European Spine Journal
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