The Experts below are selected from a list of 243 Experts worldwide ranked by ideXlab platform
M K Gueng - One of the best experts on this subject based on the ideXlab platform.
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inguinal hernia in children us versus Exploratory Surgery and intraoperative contralateral laparoscopy
Radiology, 1996Co-Authors: T Y Chou, G Y Diau, C J Wu, M K GuengAbstract:PURPOSE: To analyze the value of ultrasound (US) in the preoperative recognition of clinically apparent and inapparent inguinal hernias (or patent processus vaginalis). MATERIALS AND METHODS: Two hundred sixty children (197 boys, 63 girls), in whom a clinical diagnosis of inguinal hernia (226 unilateral hernias, 34 bilateral hernias) had been made, underwent US examination with a 7.0-MHz linear-array transducer. The contralateral internal inguinal ring was evaluated by means of intraoperative laparoscopy in 141 patients. The 197 boys were grouped together by age ( 72 months). RESULTS: In the 260 patients who underwent inguinal herniorrhaphy, 246 hernias (95%) were correctly diagnosed at US based on criteria of an internal inguinal ring width greater than 4 mm in diameter or the presence of fluid or organs in the inguinal canal at rest or during straining. A total of 473 hernias were confirmed surgically and 459 (97%) hernias were correctly detect...
Abbas Mohammadi - One of the best experts on this subject based on the ideXlab platform.
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Value of CBCT in vertical root fracture detection in endodontically-treated teeth.
Minerva stomatologica, 2017Co-Authors: Eshaghali Saberi, Narges Farhad Mollashahi, Zeinab Movasagh, Alireza Ansari Moghaddam, Abbas MohammadiAbstract:BACKGROUND: Vertical root fracture (VRF) is a diagnostic challenge for dentists. Cone-beam computed tomography (CBCT) scans provide accurate three-dimensional images of teeth enabling detection of VRFs. This in-vivo study compared the accuracy of CBCT and Exploratory Surgery for detection of VRFs in endodontically-treated teeth. METHODS: Forty endodontically-treated teeth of 40 patients with clinical signs and symptoms of VRFs were evaluated. No fracture line was detectable on periapical radiographs. The CBCT scans with limited FOV were obtained of the teeth and inspected separately by a radiologist and two endodontists. Exploratory Surgery was performed for all patients as part of their treatment to ensure the presence/absence of VRF (gold standard). RESULTS: The kappa coefficient was 0.71 (95% CI: 0.59 to 0.84). The CBCT scans had 93% sensitivity, 78% specificity and 88% accuracy for detection of VRFs. CONCLUSIONS: The results showed low specificity of CBCT imaging in detecting VRFs in endodontically-treated teeth.
T Y Chou - One of the best experts on this subject based on the ideXlab platform.
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inguinal hernia in children us versus Exploratory Surgery and intraoperative contralateral laparoscopy
Radiology, 1996Co-Authors: T Y Chou, G Y Diau, C J Wu, M K GuengAbstract:PURPOSE: To analyze the value of ultrasound (US) in the preoperative recognition of clinically apparent and inapparent inguinal hernias (or patent processus vaginalis). MATERIALS AND METHODS: Two hundred sixty children (197 boys, 63 girls), in whom a clinical diagnosis of inguinal hernia (226 unilateral hernias, 34 bilateral hernias) had been made, underwent US examination with a 7.0-MHz linear-array transducer. The contralateral internal inguinal ring was evaluated by means of intraoperative laparoscopy in 141 patients. The 197 boys were grouped together by age ( 72 months). RESULTS: In the 260 patients who underwent inguinal herniorrhaphy, 246 hernias (95%) were correctly diagnosed at US based on criteria of an internal inguinal ring width greater than 4 mm in diameter or the presence of fluid or organs in the inguinal canal at rest or during straining. A total of 473 hernias were confirmed surgically and 459 (97%) hernias were correctly detect...
Pollyanna Queiroz Freitas - One of the best experts on this subject based on the ideXlab platform.
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The diagnostic challenge of vertical root fracture in endodontically treated teeth: A case report O desafio diagnóstico de fratura radicular vertical em dentes endodonticamente tratados: relato de caso
2020Co-Authors: Pollyanna Queiroz Freitas, Paulo Maria Santos Rabêlo-júnior, Cláudia Maria Coelho Alves, Carvalho Souza, São LuisAbstract:Purpose: To present the diagnostic challenge of a clinical case of vertical root fracture (VRF) in an endodontically treated mandibular left lateral incisor and discuss the diagnostic methods employed to achieve the conclusive diagnosis. Case Description: At 16 months after endodontic treatment, a 60-year-old female patient reported pain during mastication. Clinically, she presented with an active distolingual fistula and a probing depth of 9 mm on the distal aspect of tooth 32. A radiographic examination indicated pear-shaped distal bone loss. The fistula was mapped, which confirmed that the lesion had a periodontal origin. A diagnostic hypothesis of a VRF was established. Exploratory Surgery revealed the VRF on the distolingual aspect of the root without separation of the root fragments. Conclusion: Knowledge of the diagnostic aspects and the correct interpretation of radiographic images was enough to establish the diagnostic hypothesis of a VRF. However, the conclusive diagnosis was only confirmed during Exploratory Surgery.
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The diagnostic challenge of vertical root fracture in endodontically treated teeth: a case report
Revista Odonto Ciência, 2012Co-Authors: Pollyanna Queiroz Freitas, Paulo Maria Santos Rabêlo-júnior, Cláudia Maria Coelho Alves, Soraia De Fátima Carvalho SouzaAbstract:PURPOSE: To present the diagnostic challenge of a clinical case of vertical root fracture (VRF) in an endodontically treated mandibular left lateral incisor and discuss the diagnostic methods employed to achieve the conclusive diagnosis. CASE DESCRIPTION: At 16 months after endodontic treatment, a 60-year-old female patient reported pain during mastication. Clinically, she presented with an active distolingual fistula and a probing depth of 9 mm on the distal aspect of tooth 32. A radiographic examination indicated pear-shaped distal bone loss. The fistula was mapped, which confirmed that the lesion had a periodontal origin. A diagnostic hypothesis of a VRF was established. Exploratory Surgery revealed the VRF on the distolingual aspect of the root without separation of the root fragments. CONCLUSION: Knowledge of the diagnostic aspects and the correct interpretation of radiographic images was enough to establish the diagnostic hypothesis of a VRF. However, the conclusive diagnosis was only confirmed during Exploratory Surgery.
Harald Schicha - One of the best experts on this subject based on the ideXlab platform.
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Cost-effectiveness of FDG-PET for the management of solitary pulmonary nodules: a decision analysis based on cost reimbursement in Germany
European Journal of Nuclear Medicine, 2000Co-Authors: Markus Dietlein, Kerstin Weber, Afschin Gandjour, Detlef Moka, Peter Theissen, Karl W. Lauterbach, Harald SchichaAbstract:Management of solitary pulmonary nodules (SPNs) of up to 3 cm was modelled on decision analysis comparing "wait and watch", transthoracic needle biopsy (TNB), Exploratory Surgery and full-ring dedicated positron emission tomography (PET) using fluorine-18 2-fluorodeoxyglucose (FDG). The incremental cost-effectiveness ratios (ICERs) were calculated for the main risk group, a cohort of 62-year-old men, using first "wait and watch" and second Exploratory Surgery as the baseline strategy. Based on published data, the sensitivity and specificity of FDG-PET were estimated at 0.95 and 0.80 for detecting malignancy in SPNs and at 0.74 and 0.96 for detecting metastasis in normal-sized mediastinal lymph nodes. The costs quoted correspond to reimbursement in 1999 by the public health provider in Germany. Decision analysis modelling indicates the potential cost-effectiveness of the FDG-PET strategy for management of SPNs. Taking watchful waiting as the low-cost baseline strategy, the ICER of PET [3218 euros (EUR) per life year saved] was more favourable than that of Exploratory Surgery (4210 EUR/year) or that of TNB (6120 EUR/year). Changing the baseline strategy to Exploratory Surgery, the use of PET led to cost savings and additional life expectancy. This constellation was described by a negative ICER of –6912 EUR/year. The PET algorithm was cost-effective for risk and non-risk patients. However, the ICER of PET as the preferred strategy was sensitive to a hypothetical deterioration of any PET parameters by more than 0.07. To transfer the diagnostic efficacy from controlled studies to the routine user and to maintain the cost-effectiveness of this technology, obligatory protocols for data acquisitions would need to be defined. If the prevalence of SPNs is estimated at the USA level (52 per 100,000 individuals) and assuming that multiple strategies without PET are the norm, the overall costs of a newly implemented PET algorithm would be limited to far less than one EUR per member of the public health provider in Germany.
