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Biomedical subjects

J Düker

Publications and source records attributed to J Düker.

At least 19 recordsLinked to original sources
PubMed2003

Evaluation of swallowing function after intraoral soft tissue reconstruction with microvascular free flaps.

This study assessed swallowing function after tumour resection and reconstruction utilizing free vascularized flap closures in patients with oral cancer. Swallowing function was evaluated postoperatively in 23 patients (21 men and 2 women) who had undergone reconstruction with either a lateral upper arm free flap (LUFF, n=16) or a radial forearm free flap (RFFF, n=7). Videofluoroscopy was used to assess tongue mobility and abnormalities of swallowing function. All patients who underwent reconstruction with LUFF or RFFF free flaps had decreased tongue mobility, except for the tip of the tongue. Patients who underwent anterior or posterior resection had greater decreases in tongue mobility than those who underwent medial resection. Swallowing impairment was similar in patients with LUFFs and those with RFFFs. Anterior resection of the oral cavity had a significant negative effect on swallowing function. Silent aspiration occurred in five patients. In conclusion the resection site affected swallowing function, but the type of flap did not, in patients with oral carcinoma, who underwent tumour resection with reconstruction

Adult↗
PubMed2002

[Color duplex ultrasound in monitoring vascularized fibula transplants].

BACKGROUND: For the successful management of vascularized free fibular bone grafts, the early detection of vascular complications is important. When vascular complications are suspected without a reliable monitoring of the graft perfusion, revision surgery often proved to be unnecessary. Color duplex sonography for the postoperative monitoring of free fibular bone grafts without a skin island is demonstrated. MATERIAL AND METHODS: The quantitative and qualitative monitoring of the perfusion of microvascular anastomosis and the transplanted tissues using color duplex sonography with a 7.5-Mhz scanner (Elegra, Siemens, Germany) for the postoperative monitoring of 12 free fibular bone grafts was performed. Using color duplex sonography, the perfusion of the vascular pedicle and the free fibular bone grafts was demonstrated in all 12 free fibular bone grafts. In three patients vascular complications and failure of the bone grafts were suspected due to postoperative complications next to free fibular bone grafts such as abscess formation, wound dehiscence, and disturbances of wound healing. Using color duplex sonography, adequate perfusion of the vascular pedicle and the transplanted tissue was demonstrated and therefore revision surgery not indicated. DISCUSSION: Color duplex sonography is a reliable, noninvasive, and inexpensive method for the postoperative monitoring of free fibular bone grafts.

Ameloblastoma↗
PubMed2001

Versatility and donor site morbidity of the lateral upper arm flap in intraoral reconstruction.

OBJECTIVE: The lateral upper arm flap is not widely used yet for intraoral defect reconstruction. Investigation of its morphologic and functional outcome was the objective of this study. STUDY DESIGN: The morphologic and functional results of recipient (swallowing, flap survival, dehiscence of margins, cutaneous fistulas, intraoral hairs) and donor sites (wound healing, scar width and length, sensory and motor disturbance) (n = 44) were checked clinically. Postoperative swallowing was investigated via videofluorography (n = 11). RESULTS: The lateral upper arm flap showed low donor site morbidity, primary closure was achieved in all but one case. Sensory deficit at the proximal forearm (n = 27) occurred without any case of compromise of radial nerve function. Videofluorography allows for objective evaluation of swallowing function. CONCLUSIONS: The lateral upper arm flap is the reconstruction of first choice for intraoral defects due to its low donor site morbidity.

Adult↗
PubMed1994

[Post-polio syndrome with isolated dysphagia].

The case of a 69 year old, male patient with slowly progressive dysphagia and an acute exacerbation is presented. He was referred to rule out an organic origin to his disorder. Apart from mild residual weakness of both legs after an acute paralytic poliomyelitis at the age of 20, the physical examination was essentially normal. No upper motor neuron pathology was found. Electromyography showed prevalent spontaneous and chronic denervation of bulbar and skeletal muscles. X-ray cinematography revealed abnormalities of bolus passage. On the basis of history and the benign clinical course over a 2 year follow-up period we assume a post-polio syndrome presenting with only dysphagia.

Aged↗
PubMed1994

[3-D CT for the demonstration of findings in compound skull injuries].

Conventional radiographs, axial CT with multiplanar 2-D and 3-D-CT reformations were obtained in 20 patients presenting with craniofacial injuries, to evaluate the capabilities of 3-D-CT. The image quality was assessed by two readers. Sagittal and oblique components as well as comminuted fractures could be detected by 3-D-CT reconstructions similarly to axial CT with 2-D reformations. Displacements over 2 mm were confidently documented by 3-D-CT images. 3-D-CT reconstructions allow an improved demonstration of rotational components of fractured fragments. 3-D-CT images are not as accurate as 2-D-CT in the primary detection of fractures in the relevant anatomic regions. Among 3-D-CT reconstructions, the lateral and partly the facial regions are adequately visualised.

Adolescent↗
PubMed1993

A tomographic technique for the depiction of atrophied alveolar ridges prior to endosseous implant placement.

Radiographic examination is of particular importance prior to the placement of dental implants, especially when the alveolar ridge is severely atrophied. Accurate assessment of the amount of residual bone can be improved with tomography. A method is described which utilizes templates and marking aids to facilitate the correct positioning of the jaws so as to obtain a true cross-section of the alveolar ridge at the intended implant sites. The same template can be used to determine the location and angulation of the implant at surgery.

Alveolar Bone Loss↗
PubMed1986

[Basal cell nevus syndrome in roentgen diagnosis of the skull].

Besides uni- and multilocular jaw cysts the Gorlin-Goltz-syndrome shows other characteristic radiographic findings which help to ensure diagnosis. These are particularly calcification of the falx cerebri and a so called "bridging" between processus clinoideus anterior und posterior of the sella turcica. The importance of early diagnosis is stressed.

Basal Cell Nevus Syndrome↗
PubMed1984

[Roentgenologic differential diagnosis of jaw cysts].

Using routine X-ray pictures the different types of jaw cysts are presented and the characteristic findings of the individual cyst types are emphasised. An exact diagnosis can often be made using only the panorama tomograph, particularly if the topographic position of the cyst and any relationship to the dental system are taken into account. The differential diagnosis becomes difficult in cases where the peripheral compact lamella is missing or the bony border is not sharp, and in cases of honeycombed, multilocular, polycystic form. In such cases tumours, metastases and systemic diseases must be included in the differential diagnosis of various jaw cysts.

Basal Cell Nevus Syndrome↗
PubMed1981

Remodelling processes following transplantation of dental germs in dogs.

Dental germs with different amounts of root development were transplanted from the left side to the right side, and vice versa, in young beagle dogs. The unerupted premolars had been taken out by osteotomy. After transplantation, the dental germs were covered with mucosa. The observation period lasted 7 postoperative weeks. Histological examination of the remodelling processes of the bone and tooth-tissue was carried out by polychromatic sequential labelling. All the transplanted dental germs remained vital, and the eruption continued to the normal occlusion level. From this, it follows that eruption of teeth does not depend on root development alone. In some cases, root length growth stopped immediately as a result of transplantation. Either a stumpy apex was formed, or resorption took place. In other cases root growth continued. There was a bend in the root at the point of transplantation, and the subsequently formed root section was shorter and thinner than in normal teeth.

Animals↗