Biomedical subjects

Hüseyin Akan

Publications and source records attributed to Hüseyin Akan.

7 recordsLinked to original sources

PubMed2006

Study of mandibular alveolar distraction osteogenesis using a three-dimensional computed tomography measurement method: report of four patients, a preliminary study.

OBJECTIVE: This study was conducted to show dimensional and volumetric changes after vertical alveolar distraction osteogenesis using a three-dimensional computed tomography measurement method. MATERIALS: Four patients with mandibular alveolar ridge atrophy were evaluated. Three-dimensional computed tomography reconstructions were obtained 2 weeks before and 3 months after the operation. The results of the three-dimensional computed tomography measurements were used for preoperative planning and for quantitative assessment of the mandibular alveolar distraction. The results of the preoperative and postoperative three-dimensional computed tomography measurements were compared statistically using paired t-test. RESULTS: The increase in distracted mandibular segment volume and surface area, height, and width of each slice after distraction were statistically significant (P < 0.001). CONCLUSION: In atrophic jaw cases, the dimensions of the present alveolar bone were clearly measured so that the amount of augmentation needed could be estimated. Three-dimensional computed tomography provided better understanding of the effects of distraction osteogenesis on the anterior mandible. Newly formed bone can be viewed as close to its real dimensions after distraction osteogenesis.

Adult↗

PubMed2005

Botulinum toxin for the treatment of temporomandibular joint disk disfigurement: clinical experience.

Type A botulinum toxin was used for the treatment of symptoms of 26 patients (40 joints) with temporomandibular joint disk disfigurement. In all patients, 0.5 ml (12.5 U) was injected into the lateral pterygoid muscle. The temporalis, medial pterygoid, and masseter muscles were injected if severe tenderness was noted. The data were compared using the Wilcoxon signed rank test and the McNemar test. With the exception of clicking of the right joint, all mean outcome measures showed a significant difference between the preinjection and postinjection assessments. There was a significant difference between the preinjection and postinjection pain scores of the right joint (P=0.0019) and the left joint (P=0.000). Postinjection values of the mouth opening (P=0.002), subjective functional dysfunction (P=0.065), and clicking of the left joint (P=0.001) also showed a statistically significant difference from the preinjection values. In addition, the severity and frequency of headache were reduced after botulinum toxin-A injection into the lateral pterygoid muscle.

Adult↗

PubMed2003

Comparison of computed tomography and magnetic resonance imaging in the diagnosis of parotid tumors.

OBJECTIVE: The role of computed tomography (CT) and magnetic resonance imaging (MRI) in the diagnosis of parotid tumors was investigated. METHODS: Forty patients with the clinical suspicion of a parotid mass underwent both CT and MRI of the parotid region. Two radiologists independently assessed the CT and MRI results with respect to tumor localization, tumor margin characteristics, and infiltration of surrounding tissue. Histopathologic specimens were obtained in all cases and correlated with the radiologic findings. RESULTS: The sensitivity and specificity of CT and MRI were nearly the same for tumor location, tumor margin, and tumor infiltration. CONCLUSION: The 2 imaging techniques provided the same information with respect to the presurgical planning and contribute to the diagnosis and therapy planning of parotid tumors.

Adolescent↗

PubMed2003

[The effect of giving information forms about side effects of intravenous iodinated contrast material on the anxiety level of patients].

PURPOSE: We aimed to determine the effect of informing patients about side effects of the contrast material on the level of patients' anxiety. MATERIALS AND METHODS: Two hundred-ninety seven patients undergoing computed tomography examination were enrolled in the study. Patients were grouped in three categories: (1) patients informed about adverse effects of contrast material and waiting for i.v. contrast material injection, (2) uninformed patients waiting for i.v. contrast material injection, (3) uninformed patients undergoing unenhanced CT examination. All patients were requested to complete a questionnaire including a standard anxiety test. The results were compared statistically. RESULTS: The mean anxiety scores calculated by variant analysis were 39.2 +/- 11.7, 42 +/- 10.4, and 38.6 +/- 9.5 in groups 1, 2, and 3, respectively. No statistically significant difference was found between the anxiety scores of the 3 groups. CONCLUSION: Informing patients about the adverse effects of the contrast material does not affect their anxiety level.

Adult↗

PubMed2003

[Case report: Maxillary myxoma].

Maxillary myxoma is a rare benign mesenchymal tumor of unknown etiology. Although odontogenic myxomas are benign and nonmetastasizing tumors, they are locally invasive and have a propensity to recur if incompletely resected. We report a case of odontogenic myxoma involving the anterior part of the maxilla and discuss the role and findings of radiologic imaging.

Adult↗

PubMed2003

[Opinion: turkish in medical communication].

Several problems associated with the use of Turkish in medical, and in particular, radiological communication are addressed in this article. Many words used in medical communication in Turkey have been adapted from European languages. Incorrect spelling and pronounciation of these words occurs quite frequently. A significant proportion of "Turkish" medical vocabulary has been inherited from the former invaders of the Turkish, namely the Persian and Arabic languages. For a rich and living Turkish in medical communication, we must respect our maternal language, prefer the already existing Turkish medical terminology, and try to find and introduce Turkish counterparts for new medical terms.

Humans↗

PubMedDate not supplied

Dynamic upper airway soft-tissue and caliber changes in healthy subjects and snoring patients.

BACKGROUND AND PURPOSE: The oropharyngeal airways are smaller in those who snore than in those who do not. We sought to determine which soft-tissue component surrounding the airways contributes to upper airway narrowing in those who snore. METHODS: Ten control subjects and 19 snoring patients underwent CT, with 2-mm-thick axial sections obtained every 0.6 seconds during the respiration cycle at the same oropharyngeal level. We selected two sections with the widest and narrowest parts of the oropharyngeal airway to measure the anteroposterior and lateral dimensions of the airway and the thickness of the bilateral parapharyngeal fat pads, pterygoid muscles, and parapharyngeal walls. Mean values were calculated for each phase. For each subject, differences were calculated by subtracting the values in narrowest phase from those in the widest phase. RESULTS: Changes in airway dimension (P < .05) and lateral parapharyngeal wall thickness (P < .01) were significantly different between snorers and control subjects. Changes in parapharyngeal wall thickness and transverse oropharyngeal airway diameter changes were significantly related (P < .01) in those who snored but not in control subjects. CONCLUSION: Airway narrowing predominantly occurs in the lateral dimension in people who snore. Changes in the lateral pharyngeal wall are more important than the parapharyngeal fat pads in airway calibration. Narrowing of the upper airway area at the end of the expirium and the beginning of the inspirium is thought to be the cause of snoring and due to augmented muscle mass and prolonged laxity rather than inadequate activation of the pharyngeal dilating muscles.

Adipose Tissue↗