1,720,963 research outputs found
Can tongue shadow in panoramic radiographs be avoided by using the tongue repositioning maneuver?
No full textObjective. The purpose of this study was to evaluate the use of the tongue repositioning maneuver (TRM) during panoramic radiography so as to avoid the error of tongue shadow. Study Design. A total of 300 panoramic radiographs were evaluated. One hundred and fifty orthopantomograms with conventional positioning technique were used as a control group, while other 150 were taken with the patient performing the TRM. The tongue shadow was measured in each radiograph in the first molar regions bilaterally and in the midsagittal plane. Wilcoxon Mann-Whitney U-Test was used to test the significance difference between the groups. Results. The tongue-palate distance in the study group was reduced from a mean value of 6.4 mm to 1 mm in the right first molar, 8.0 mm to 2.2 mm in the midsagittal region, and 6.6 mm to 1.2 mm in the left first molar position. Statistical evaluation exhibited significant differences of tongue shadow at all measuring sites between study and control group (P < .0001). Conclusions. The present study demonstrates that the TRM leads to a substantial reduction of the tongue position error in panoramic radiography
Sialoendoscopy as a diagnostic and therapeutic option for obstructive diseases of the large salivary glands-a retrospective analysis
No full textThe diagnosis and therapy of obstructive inflammatory disorders of the salivary glands have changed in the past decades following the introduction of sialoendoscopy. The aims of the present study were to analyze the relevance of sialoendoscopy using our own data and to compare the results to those of other studies. A retrospective analysis of 70 patients was performed, who were treated for obstructive disorders of the parotid and/or submandibular gland in whom sialoendoscopy was indicated. Two categories of interventions were considered: diagnostic interventional sialoendoscopy and endoscope-assisted interventions. Interventional sialoendoscopy procedures requiring extirpation of the gland were included in the analysis, as were abnormal intraductal processes that were detected during endoscopy. Treatment was successful in 58 of 67 (86.6 %) procedures (sialoendoscopy without surgical intervention n = 59; endoscope-assisted surgical intervention n = 8). Based on the underlying disease, the success rate was 88.6 % (n = 39) in patients with obstructive sialadenitis without sialolithiasis and 86.6 % (n = 19) in patients with sialolithiasis. It was not possible to draw definitive conclusions on the underlying disease from the observed pathological intraductal changes. Sialoendoscopy is an effective and safe diagnostic and therapeutic option with low complication rate. However, limiting factors such as the size or the position of potentially removable obstacles must be taken into consideration. The rate of gland extirpations can be reduced using sialoendoscopy
Deep neck infections: A single-center analysis of 63 cases
Full text linkBackground and Purpose: With the use of antibiotic therapy, the incidence of deep neck infections has decreased in recent decades. The aim of this investigation was to review the clinical course and the management of deep neck infections in our department, compare them to the experiences of the common literature and identify predisposing factors for lethal complications. Material and Methods: In this single-center analysis, 63 patients with deep neck infections were treated surgically. The following clinical data were analyzed and compared: age, gender, laboratory data, spatial manifestation, therapeutic modalities, comorbidities, length of hospitalization and complications. Results: There was a predominance of male patients (58.7%) and a mean age of 57.9 years. The most common symptoms at diagnosis were sore throat (96.8%) and neck swelling (92.0%). Cardio/pulmonary diseases and diabetes mellitus were the most common comorbidities. There was a significantly longer hospital stay for patients with diabetes mellitus. The most common manifestation was a parapharyngeal abscess in 24 patients (38.1%), followed by peri-/retrotonsillar infections in 19 patients (30.2%). In 29 patients, a multiple space infection was observed, with a significantly longer duration of hospitalization and a higher rate of complications. The main life-threatening complication was the development of airway obstruction in 20 patients (31.7%), who all received a tracheostomy. The duration of hospitalization for patients with complications was significantly longer. Conclusions: Close attention must be paid to the management of patients with deep neck infections, especially patients with diabetes mellitus and cardio/pulmonary diseases or patients with multiple space infections. Key words:Deep neck infections, comorbidities, surgical treatment, tracheostomy, diabetes mellitus
A review of pathogenesis, diagnosis, treatment options, and differential diagnosis of odontogenic infections: A rather mundane pathology?
No full textOdontogenic infections are common in the dental practice and their treatment should be a standard procedure for every dentist. For optimal management of septic intraoral problems, the practitioner must understand the underlying causes and etiologies of odontogenic infections. Therefore, the purpose of this article is to outline basic inflammatory processes involved in the development of odontogenic and intraoral infections including relevant pathogens, biochemical processes mediated by pro-inflammatory molecules, the basics of abscess formation, the host response, and the clinical appearance of intraoral septic processes. Furthermore, treatment modalities of odontogenic infections and associated lesions are discussed and a brief explanation of possible complications and their management is provided
The incidence of occult metastasis and the status of elective neck dissection in salivary adenoid cystic carcinoma: a single center study
No full textEarly disruption of the blood-brain barrier after thrombolytic therapy predicts hemorrhage in patients with acute stroke
No full textBackground and Purpose-Leaks of the blood-brain barrier can be detected on postcontrast-enhanced T1-weighted MRIs. Although early disruptions of the blood-brain barrier appear to be an important risk factor for tissue plasminogen activator-related hemorrhages in rodents, little is known about their incidence and consequences in human stroke. Methods-This is a retrospective analysis of a prospectively collected stroke database over the past 6 years. In 52 patients, multimodal MRI (including diffusion-weighted, perfusion-weighted, and postcontrast-enhanced T1-weighted MRI to detect blood-brain barrier changes) had been performed immediately before systemic thrombolysis and in 48 patients within a median of 30 minutes (interquartile range: 30 to 60 minutes) after recombinant tissue plasminogen activator treatment. The incidence of symptomatic hemorrhage (SICH), defined as any parenchymal hemorrhage leading to deterioration in the patient's clinical condition, was related to several clinical and imaging variables, including early blood-brain barrier changes. Results-Overall, SICH was detected in 9 (9%) patients and among these, 2 died. Although no blood-brain barrier changes were detectable before thrombolysis, 3 of 48 patients (6.25%) had a parenchymal gadolinium enhancement in the areas of initial infarction after tissue plasminogen activator treatment. All 3 patients developed SICHs at sites corresponding to the areas of enhancement. The presence of a parenchymal enhancement was significantly associated with SICH (P < 0.01), whereas other clinical and imaging variables did not predict SICH in this series. Conclusion-Early parenchymal enhancement after intravenous tissue plasminogen activator is significantly associated with subsequent SICH and could therefore become a useful imaging sign for the rapid initiation of preventive strategies in the future
Clinical prognostic factors of salivary adenoid cystic carcinoma: A single-center analysis of 61 patients
No full textAdenoid cystic carcinomas are rare malignant tumors of the salivary glands. They are characterized by a high rate of local recurrence, late distant metastasis and a poor disease-free survival. In this study, we analyzed a series of 61 patients who were all treated at the University of Göttingen over a period of 21.0 years
Osteoblast-like cells with different embryologic origins behave differently in increasing zoledronic acid concentrations: a pilot study in pigs
No full textWe compared the intraindividual effects of increasing zoledronic acid (ZA) concentrations on osteoblast-like cells with different embryologic origins
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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