Publications by authors named "Gregor Bran"

Presently, there is no consensus on which patient-reported outcome measurement (PROM) instrument is best suited to assess the aesthetic outcomes of rhinoplasty. In this regard, at least seven different validated PROMs are available from the literature, each one with advantages and disadvantages.In this article, we review the development, validation, international translation, and clinical application of the Utrecht Questionnaire (UQ).

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A thin or damaged skin soft tissue envelope may cause concerns in primary and secondary rhinoplasty. During postoperative healing, unpredictable scarring and contraction may occur and lead to significant aesthetic and trophic sequelae. Besides a meticulous surgical technique, there are no reliable techniques to prevent long-term skin damage and shrinkage.

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Background: Lip enhancement continues to be one of the most popular facial procedures. State-of-the-art lip enhancement involves sculpting of perilabial soft tissue, in particular, the philtrum, but it is unclear how patients perceive their philtral contours.

Objectives: The aim of this study was to test the impact of the philtrum on attractiveness, and on the perception of facial proportions and age.

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Introduction: The assessment of outcomes in aesthetic rhinoplasty is highly relevant because patient satisfaction and improved health-related quality of life (QoL) are the predominant factors in determining success. The patient-reported outcome measures (PROMs) employed in rhinoplasty research studies are remarkably diverse, thus yielding difficulties with data analysis. The aim of this article is to provide a comprehensive review of the literature to reveal the relevance of the QoL assessment for rhinosurgeons.

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Multiple techniques have been described for dorsal nasal augmentation in rhinoplasty. In this article, we review common surgical techniques for raising the dorsum or eliminating dorsal irregularities, by highlighting inherent advantages and disadvantages of each method. Within the past few years, the use of diced cartilage grafts has become the workhorse in this field of interest.

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Background: Diced cartilage wrapped in fascia or modeled with tissue sealant has successfully been used as dorsal onlay grafts in rhinoplasty. The use of autologous material introduces the risk of donor site morbidity, and sometimes availability is limited.

Methods: We present a series of nine cases that were performed using diced irradiated homologous rib cartilage as an onlay graft.

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Unlabelled: Congenital deformities of the nasal cartilage are extremely rare. Often, they remain undiscovered until an open approach is completed during rhinoplasty. We present a case of unilateral congenital agenesis of the middle and lateral crura of the alar cartilage.

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Unlabelled: Post-paralytic facial nerve syndrome (PFS) summarizes specific symptoms that result from an incomplete or poor recovery of the facial nerve after peripheral facial palsy. Selective chemodenervation using botulinum toxin A (Btx A) and mime therapy represent the therapeutic standard for treating PFS. We report on a 35-year-old male who was suffering greatly from unilateral PFS-specific movement disorders, including periorbital contractions and oculofacial synkinesis that did not respond to Btx A administration.

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Background: Delayed recovery after facial palsy results in aberrant nerve regeneration with symptomatic movement disorders, summarized as the postparalytic facial nerve syndrome. The authors present an alternative surgical approach for improvement of periocular movement disorders in patients with postparalytic facial nerve syndrome. The authors proposed that endoscopic brow lift leads to an improvement of periocular movement disorders by reducing pathologically raised levels of afferent input.

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Objectives: To describe the split hump technique (SHT) and to examine its effectiveness for correction of an overprojected nasal dorsum in patients undergoing aesthetic rhinoplasty.

Methods: This prospective study included 97 patients. Objective assessment was performed using a short, practical questionnaire.

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The objective of the study was to assess the short-term efficacy of radiofrequency volumetric tissue reduction (RFVTR) of the inferior turbinates in patients with nasal obstruction caused by turbinate hypertrophy. The study is a prospective, randomized, single-blinded, placebo-controlled, crossover trial. A total of 22 patients (age range 21-72 years; median age 41 years) were randomized into two treatment arms.

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Objective: To develop a new, custom-made pressure device that can be used with established designs as an adjuvant therapy for optimized treatment of auricular keloids.

Methods: Seven patients (4 males, 3 females; mean [SD] age, 22.6 [8.

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The growth of tumor cells can be regulated by a variety of cytokines. To investigate the pathogenesis of head and neck cancer and explore a new therapeutic approach for the carcinoma, the role of interleukin-6 (IL-6) in the growth of a human head and neck squamous cell carcinoma (HNSCC) cell line was examined. Whether or not IL-6 is increased in HNSCC and whether or not IL-6 antisense oligonucleotide treatment could decrease proliferation and angiogenic activity of HNSCC cell lines, was determined.

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Article Synopsis
  • The study aimed to explore how TGF-β1 antisense treatment affects the SMAD signaling system in keloid fibroblasts.
  • Keloid and healthy tissue samples from 9 patients were analyzed for the expression of various SMAD proteins using immunohistochemistry and RT-PCR techniques.
  • Results showed that TGF-β1 increased the levels of certain SMAD proteins while the antisense therapy decreased some of them, indicating an abnormal response of keloid fibroblasts to TGF-β1 which may contribute to excessive tissue growth.
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Objective: To identify changes in the expression of matrixmetalloproteinases (MMPs) and their specific inhibitors tissue inhibitors of metalloproteinases (TIMPs) after targeting of transforming growth factor-beta1 (TGF-beta1) with antisense oligonucleotides.

Study Design: Cross-sectional study.

Setting: The study was performed on tissue samples from nine patients with keloid scars after otoplasty presenting to the Otolaryngology-Head and Neck Surgery Department of the University Hospital in Mannheim, Germany.

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Objective: To investigate the pathophysiology of radiation-induced wounds of the head and neck at a molecular level.

Study Design: Basic science, prospective study.

Setting: The study was conducted at the Department of Otolaryngology-Head and Neck Surgery, Ruprecht Karls-University Heidelberg, Faculty of Medicine Mannheim, Mannheim, Germany.

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Disequilibrium of dermal wound repair can result in continued accumulation of ECM and excessive scar formation. In susceptible genetically predisposed individuals, keloid formation can be observed. Keloid disease represents a benign dermal fibroproliferative tumor that is unique to humans.

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Excess scar formation occurs after dermal injury as a result of abnormal wound healing. Hypertrophic scars and keloids both represent fibrotic skin conditions which can be very difficult, even frustrating, to treat. Identification of differences between hypertrophic scars, keloids and normal scars are a prerequisite for finding the correct therapeutical concept.

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Inhibition of angiogenesis by blocking angiogenic cytokines or their pathways has become a major target in experimental cancer therapies. This therapeutical approach requires a profound knowledge of growth factor profiles that contribute to tumor growth and progression. The respective knowledge is presently rather incomplete for head and neck squamous cell carcinomas (HNSCC).

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The aim of this study was to determine in what way HHT (hereditary hemorrhagic telangiectasia) patients with mutations for the endoglin (ENG) or activin receptor-like kinase 1 (ACVRL1) gene show different expression levels of the angiogenic factor VEGF (vascular endothelial growth factor) by correlating VEGF to the HHT genotype. In 18 HHT patients, who were screened for ENG and ACVRL1 gene mutations and 25 healthy controls the VEGF plasma level as well as the VEGF tissue expression were determined by ELISA technique and cryostat sections of the nasal mucosa. In general, the VEGF plasma levels as well as the VEGF tissue expression were significantly higher in HHT patients compared to healthy controls.

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The use of adult mesenchymal stem cells (MSC) in cartilage tissue engineering has been implemented in the field of regenerative medicine and offers new perspectives in the generation of transplants for reconstructive surgery. The extracellular matrix (ECM) plays a key role in modulating function and phenotype of the embedded cells and contains the integrins as adhesion receptors mediating cell-cell and cell-matrix interactions. In our study, characteristic changes in integrin expression during the course of chondrogenic differentiation of MSC from bone marrow and foetal cord blood were compared.

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Bone loss due to congenital defects, trauma, improper fracture fixation, metabolic disturbances, infections, or after tumor resection represents a major clinical problem in head and neck surgery. To address these issues, different types of scaffolds, growth factors and cell sources -- alone or in various combinations -- have been applied for development of bioartificial bone tissues. Although these applications have received increasing interest, use of autologous bone grafts is still considered as the gold standard for tissue repair.

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The use of adult mesenchymal stem cells (MSC) in cartilage tissue engineering offers new perspectives in the generation of transplants for reconstructive surgery. The extracelular matrix (ECM) plays a key role in modulating the function and phenotype of the embedded cells and contains the integrins as adhesion receptors mediating cell-cell and cell-matrix interactions. In our study, characteristic changes in integrin expression during the course of chondrogenic differentiation of MSC from bone marrow and adipose tissue were compared.

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Skeletal muscle tissue engineering, a promising specialty, aims at the reconstruction of skeletal muscle loss. In vitro tissue engineering attempts to achieve this goal by creating differentiated, functional muscle tissue through a process in which stem cells are extracted from the patient, e.g.

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