Biomedical subjects

C Görken

Publications and source records attributed to C Görken.

6 recordsLinked to original sources

PubMed2000

The role of periosteum and different dissection types on callus formation: quantitative analyses with scintigraphy in a rabbit mandible model.

In this experimental study, the effects of different dissection types and the role of the periosteum on callus formation were investigated. Forty-five rabbits were divided into three groups of 15 rabbits. In the first group, a classic subperiosteal dissection was performed to reach the mandible. In the second group, the dissection was done extraperiosteally between the periosteum and the muscle. In the third group, the periosteum at the osteotomy line was stripped out bilaterally both on the lingual and the buccal sides (1.5 cm wide on each side). In all groups, linear vertical osteotomy was performed using an oscillating saw, and fracture fragments were fixed with surgical wire. The animals were evaluated using biomechanical (traction test), histological, and scintigraphic methods. The most durable callus in the traction test and, scintigraphically, the most rapid remodeling were seen in the second group. The histological study performed during week 3 revealed immature callus formation in the first and second groups, and no such formation in the third group. At week 8 the callus was mature in the first two groups and in the third group it was seen but not mature.

Animals↗

PubMed1999

Management of frontoethmoidal (sincipital) encephalocele.

Frontoethmoidal encephaloceles are congenital malformations that cause complex deformities in the frontal, orbital, and nasal regions. As the term implies, with frontoethmoidal encephaloceles, intracranial material has herniated through the dural and skull defect. In this report, 21 patients with frontoethmoidal encephalocele operated by a craniofacial team are presented, and accompanying anomalies, results, and complications are discussed.

Bone Transplantation↗

PubMed1999

A modified fixation method in supraorbital bar advancement.

In almost all congenital craniofacial deformity reconstructions there is a need to advance the supraorbital bar. This bar, which is fixed by several techniques, should be firm enough to minimize a relapse. In this paper a new modification during osteotomy of the supraorbital bar is presented that provides firmness and prevents relapse even without grafts. The last 15 patients with craniofacial anomalies were operated with this modification. At the stage of the supraorbital bar osteotomy, bilateral small triangles are created at the end of the bar. Then, on the lateral orbital rim, two small notches are created in which to place these triangles. By fixating these triangles to the notches, sliding of the bar and subsequent relapse is prevented, and also the fixation provided is much more rigid.

Craniofacial Abnormalities↗

PubMed1999

Congenital infiltrating lipomatosis of the face.

Congenital infiltrating lipomatosis of the face is a rare clinical entity. Since it was first described by Slavin and colleagues in 1989, only a few cases have been reported in the literature. A 6-year-old girl with congenital infiltrating lipomatosis of the right side of the face is presented, and treatment modalities are discussed.

Child↗

PubMed1997

Comparison of fixation methods in treating mandibular fractures: scintigraphic evaluation.

The effects of rigid and nonrigid fixation methods in the treatment of long bones have been studied by many authors. A comparison of these two methods has been undertaken on long bones and documented in previous studies. However, there appears to be no such research on facial bone fractures. In this study a mandibular model was selected as an appropriate model for fracture site mobility in the face. Twenty-three patients with mandibular fractures were admitted to the study. Two groups were formed. The first group consisted of intermaxillary fixation patients and the second group was comprised of internal rigid fixation-treated patients. The callus deposit was evaluated by the technetium 99m methylene diphosphonate scintigraphic method on days 1, 10, 20, 30, and 40 postoperatively. The results of the study showed that the greatest level of callus formation is in the second exposure (days 1 to 10) for the first group and in the third exposure (days 10 to 20) for the second group. This study demonstrates that minimal motion on the fracture line after intermaxillary fixation increases local blood circulation and osteoblastic activity. The callus deposit reaches maximum in a short period of time with nonrigid fixation.

Adult↗

PubMed1994

Facial cleft no. 30.

Midline clefts of the lower lip, mandible, tongue, and neck are rare congenital deformities and are classified as facial cleft no. 30 by Tessier. This is a report of a patient who presented with congenital fibrotic neck cord but no lower lip cleft, which has been the most frequently observed pathognomonic sign of this anomaly. The patient was treated initially for thyroglossal remnant. In the patients who present with a fibrotic cord located at the cervical midline without a lower lip cleft, the diagnosis of facial cleft no. 30 should be kept in mind.

Adolescent↗