Richard Barkhuysen

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OBJECTIVES It has been postulated that in the arterial system mean wall shear stress is maintained at a constant value. The present study was performed to investigate the level of wall shear stress in the common carotid artery (CCA) as function of age and possible interactions between diameter and storage capacity, defined as the absolute area change per(More)
In the present study, the reliability of an ultrasonic shear rate estimating system, in terms of intrasubject intrasession, intersubject intrasession and intersubject intersession variability coefficients for the assessment of wall shear rate (WSR) in the common carotid artery (CCA) was determined in eight presumed healthy volunteers. Measurements were(More)
The scientific literature is sparse on reports that evaluate facial asymmetry after mandibular reconstructive surgery objectively. The aim of this study is to introduce and validate a new method, using three dimensional (3D) stereophotogrammetry, that quantifies soft-tissue facial asymmetry in patients who have undergone mandibular reconstruction. To(More)
Reconstruction of a severely atrophied maxilla by sinus augmentation with a mixture of hydroxylapatite (HA) granules and autologous cancellous bone is claimed to be a predictable means to facilitate implant placement. To the authors' knowledge, this is the first human histological case report of plasma-sprayed HA-coated implants being loaded after sinus(More)
Orbital cellulitis is an uncommon, potentially devastating condition that, when not promptly and adequately treated, can lead to serious sequelae. The presenting clinical signs are proptosis, swelling, ophthalmoplegia, pain and redness of the peri-orbital tissues. A number of cases have been reported in which these symptoms have been mistakenly interpreted(More)
Mandibular fractures are among the most common facial bone injuries. Approximately 50% of the fractures occur in teeth bearing areas. Consequently, the likelihood that a tooth will be in the fracture line is substantial. A review of the literature reveals that there is not a clear guideline for preserving or removing a tooth in a mandibular fracture line.(More)
Routine dental radiographic examination in a 16-year-old girl revealed the presence of 3 well-defined radiolucent cystlike structures in the mandible. After clinical and radiological examination, a multiple traumatic bone cyst was diagnosed. Surgical exploration confirmed the diagnosis. Curettage of the lesions was performed. Fifteen months later, a(More)
A 32-year-old female patient was referred to an oral and maxillofacial surgeon with an asymptomatic swelling in the left mandibular premolar region. After extraction of these premolars and enucleation of the lesion histopathological examination confirmed the presence of a giant cell granuloma. This is a benign lesion and enucleation generally results in a(More)
Transplants from the anterior iliac crest are used for most reconstructive procedures in cranio-maxillofacial surgery. The advantages are easy accessibility, the ability to work in two teams and the amount of corticocancellous bone available; disadvantages are postoperative pain and gait disturbances. To reduce donor-site pain, the effect of a single dose(More)
Lymangiomas are congenital malformations of the lymphatic system. They can appear at any age and in any part of the body. In the head and neck area lymangiomas can give rise to functional as well as esthetic problems. Therapy consist of sclerosis, possibly followed by surgical excision. Stereophotogrammetry is a relatively new technique which, by means of(More)