Lacrimal Bone Thickness at the Lacrimal Sac Fossa

1996 ◽  
Vol 27 (8) ◽  
pp. 679-684 ◽  
Author(s):  
Jouko Hartikainen ◽  
Heikki J Aho ◽  
Heikki Seppä ◽  
Reidar Grenman
Keyword(s):  
Lacrimal Sac ◽  
Bone Thickness ◽  
Lacrimal Bone

Relationship Between Lacrimal Bone Thickness and Lacrimal Sac in Chronic Dacryocystitis

2020 ◽  
Vol 31 (1) ◽  
pp. 207-209
Author(s):  
Suphi Bulgurcu ◽  
Mehmet Idil ◽  
Yeliz Pekçevik ◽  
Ibrahim Cukurova
Keyword(s):  
Lacrimal Sac ◽  
Bone Thickness ◽  
Chronic Dacryocystitis ◽  
Lacrimal Bone

scholarly journals Endoscopic Dacryocystorhinostomy: Our Experience

2017 ◽  
Vol 10 (2) ◽  
pp. 49-52
Author(s):  
Jyothi A Chavadaki ◽  
Ajay K Manvikar ◽  
BH Shrikrishna
Keyword(s):  
Neck Surgery ◽  
Nasolacrimal Duct ◽  
Surgical Removal ◽  
Lacrimal Sac ◽  
Endoscopic Evaluation ◽  
Endoscopic Dacryocystorhinostomy ◽  
Medical College ◽  
Frontal Process ◽  
Lacrimal Bone ◽  
Silicone Intubation

ABSTRACT Purpose To determine the outcome and safety of endoscopic dacryocystorhinostomy (ENDO-DCR) with the use of silicon stents in nasolacrimal duct obstruction (NLDO). Materials and methods This study was done in the Department of Otorhinolaryngology and Head and Neck Surgery, Navodaya Medical College, Raichur, from January 2013 to June 2015, with a total of 82 cases (10 cases with bilateral disease) who underwent a standardized procedure, with an endonasal approach to the lacrimal sac, surgical removal of nasal mucosa, lacrimal bone, and a fragment of the frontal process of the maxilla. The medial wall of the lacrimal sac was removed completely and canalicular silicone intubation tube was placed for 6 weeks postoperatively. Main outcome measures were resolution of epiphora, absence of discharge, and patency of the ostium confirmed by irrigation and endoscopic evaluation of neo-ostium at 6 weeks. Results The ENDO-DCR procedure with adjunctive canalicular silicone intubation tube was successful in 78 (95%) cases. No significant complications were encountered during or after the operative period. Conclusion Endoscopic dacryocystorhinostomy with canalicular silicon intubation for shorter duration (6 weeks) is a safe and successful procedure for the treatment of NLDO in adults as well as in children, with a success rate of 95%. How to cite this article Chavadaki JA, Manvikar AK, Shrikrishna BH. Endoscopic Dacryocystorhinostomy: Our Experience. Clin Rhinol An Int J 2017;10(2):49-52.

Oncocytoma of the lacrimal sac

2018 ◽  
Vol 68 (4) ◽  
Author(s):  
Matteo Brucoli ◽  
Mauro Magnano ◽  
Paolo Boffano ◽  
Patrizia Mola ◽  
Rodolfo Benech ◽  
...  
Keyword(s):  
Lacrimal Sac

Measurement of Bone Thickness in Baha: How we do it?

2018 ◽  
Vol 8 (4) ◽  
Author(s):  
Hetal Marfatia ◽  
Ratna Priya ◽  
Nilam U. Sathe ◽  
Sheetal Shelke
Keyword(s):  
Bone Thickness

Accuracy of robot-assisted versus optical frameless navigated stereoelectroencephalography electrode placement in children

2019 ◽  
Vol 23 (3) ◽  
pp. 297-302 ◽  
Author(s):  
Julia D. Sharma ◽  
Kiran K. Seunarine ◽  
Muhammad Zubair Tahir ◽  
Martin M. Tisdall
Keyword(s):  
Soft Tissue ◽  
Entry Point ◽  
Electrode Placement ◽  
Target Point ◽  
Localization Error ◽  
Bone Thickness ◽  
Tissue Thickness ◽  
Robot Assisted ◽  
Soft Tissue Thickness ◽  
Safety Margins

OBJECTIVEThe aim of this study was to compare the accuracy of optical frameless neuronavigation (ON) and robot-assisted (RA) stereoelectroencephalography (SEEG) electrode placement in children, and to identify factors that might increase the risk of misplacement.METHODSThe authors undertook a retrospective review of all children who underwent SEEG at their institution. Twenty children were identified who underwent stereotactic placement of a total of 218 electrodes. Six procedures were performed using ON and 14 were placed using a robotic assistant. Placement error was calculated at cortical entry and at the target by calculating the Euclidean distance between the electrode and the planned cortical entry and target points. The Mann-Whitney U-test was used to compare the results for ON and RA placement accuracy. For each electrode placed using robotic assistance, extracranial soft-tissue thickness, bone thickness, and intracranial length were measured. Entry angle of electrode to bone was calculated using stereotactic coordinates. A stepwise linear regression model was used to test for variables that significantly influenced placement error.RESULTSBetween 8 and 17 electrodes (median 10 electrodes) were placed per patient. Median target point localization error was 4.5 mm (interquartile range [IQR] 2.8–6.1 mm) for ON and 1.07 mm (IQR 0.71–1.59) for RA placement. Median entry point localization error was 5.5 mm (IQR 4.0–6.4) for ON and 0.71 mm (IQR 0.47–1.03) for RA placement. The difference in accuracy between Stealth-guided (ON) and RA placement was highly significant for both cortical entry point and target (p < 0.0001 for both). Increased soft-tissue thickness and intracranial length reduced accuracy at the target. Increased soft-tissue thickness, bone thickness, and younger age reduced accuracy at entry. There were no complications.CONCLUSIONSRA stereotactic electrode placement is highly accurate and is significantly more accurate than ON. Larger safety margins away from vascular structures should be used when placing deep electrodes in young children and for trajectories that pass through thicker soft tissues such as the temporal region.

Avaliação da Eficácia da Administração de Dexametasona ou Metilprednisolona para Produzir Osteoporose em Ratas/ Evaluating the Effectiveness of Dexamethasone or Methylprednisolone to Produce Osteoporosis in Rats

2011 ◽  
Vol 1 (1) ◽  
pp. 22
Author(s):  
Nilo César do Vale Baracho ◽  
Alexandre Mata de Paula ◽  
Roberto Franzini Junior ◽  
Rogério Mariotto Bitetti da Silva ◽  
Bruno Appolari ◽  
...  
Keyword(s):  
Bone Mass ◽  
Disease Incidence ◽  
Public Health Problem ◽  
Bone Thickness ◽  
Good Marker ◽  
Significant Difference ◽  
Group Control ◽  
Successful Induction ◽  
Calcium Phosphorus ◽  
De Medicina

Introdução: A osteoporose é considerada um grave problema de saúde pública em todo o mundo. No Brasil ainda não há dados estatísticos sobre a real incidência desta doença. Os glicocorticóides representam uma classe de drogas muito usada, sendo que podem influenciar significativamente a massa óssea. Entretanto, após tratamento com glicocorticóides em ratos, esses podem ou não apresentar alterações na massa óssea. Objetivo: Avaliar a eficácia da administração de dexametasona ou metilprednisolona em produzir osteoporose em ratas. Métodos: Vinte e quatro ratas, oriundas do biotério da Faculdade de Medicina de Itajubá, foram utilizadas e divididas em três grupos: controle, metilprednisolona e dexametasona. Foram avaliados íons e proteínas totais sanguíneos e feita a análise histopatológica de tecido ósseo. Resultados e conclusão: Pela análise histológica da espessura trabecular óssea, houve redução da massa óssea dos grupos tratados com glicocorticóides em comparação com o grupo controle, evidenciando o sucesso da indução de osteoporose. Além disso, houve uma maior redução da massa óssea no grupo tratado com dexametasona, em comparação com o grupo tratado com metilprednisolona. A análise bioquímica de cálcio, fósforo, magnésio e proteínas totais não sofreram diferença significativa entres os grupos, não sendo um bom marcador para remodelamento ósseo e para diagnóstico de osteoporose.Evaluating the Effectiveness of Dexamethasone or Methylprednisolone to Produce Osteoporosis in RatsIntroduction: Osteoporosis is considered a serious public health problem in worldwide. In Brazil we do not have statistics on the real disease incidence. Glucocorticoids are a class of drugs widely used, and can significantly influence bone mass. However, after treatment with glucocorticoids in rats, these may or may not show changes in bone mass. Objective: Evaluating the effectiveness of dexamethasone or methylprednisolone to produce osteoporosis in rats. Methods: Twenty-four rats, originated from the vivarium of the Faculty of Medicine Itajubá were used and divided into three groups: control, methylprednisolone and dexamethasone. Ions was evaluated blood and histopathology of bone tissue. Results and conclusion: by histologic analysis of trabecular bone thickness, a reduction of the mass bone in the groups treated with glucocorticoids compared with the group control, demonstrating the successful induction of osteoporosis. Furthermore, there was a greater reduction in bone mass in the group treated with dexamethasone compared with the group treated with methylprednisolone. The analysis biochemistry of calcium, phosphorus, magnesium and total protein did not undergo significant difference among the groups, there is a good marker for bone remodeling and osteoporosis diagnosis.

scholarly journals Primary malignant melanoma of the lacrimal sac

2012 ◽  
Vol 2012 (aug09 1) ◽  
pp. bcr2012006349-bcr2012006349 ◽  
Author(s):  
Y.-J. Li ◽  
S.-J. Zhu ◽  
H. Yan ◽  
J. Han ◽  
D. Wang ◽  
...  
Keyword(s):  
Malignant Melanoma ◽  
Primary Malignant Melanoma ◽  
Lacrimal Sac

scholarly journals Risk assessment of labial bone perforation in the anterior mandibular region: a virtual immediate implant placement study

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Yi-Wen Cathy Tsai ◽  
Ren-Yeong Huang ◽  
Chia-Dan Cheng ◽  
Wan-Chien Cheng ◽  
David L. Cochran ◽  
...  
Keyword(s):  
Estimating Equation ◽  
Class Ii ◽  
Multivariable Logistic Regression Analysis ◽  
Bone Thickness ◽  
Cavity Depth ◽  
Implant Placement ◽  
Anterior Teeth ◽  
Confounding Variables ◽  
Mandibular Region ◽  
Immediate Implant

Abstract Background This study investigated the prevalence of labial bone perforation (LBP) related to the associated anatomic factors in anterior mandibular region using a virtual immediate implant placement procedure. Methods Series qualified CBCT images of 149 participants (894 teeth) were selected to analyze the assigned anatomical parameters, including concavity depth, concavity angle, torque, and deep bone thickness. Four classes of crestal and radicular dentoalveolar bone phenotypes (CRDAPs) of mandibular anterior teeth were categorized according to the thickness of dentoalveolar bone at both crestal and radicular zones. Data were adjusted for categorical (gender and CRDAP) and continuous (age, cavity angle, cavity depth, and deep bone thickness) variables using a multivariable logistic regression analysis with generalized estimating equation method. Results The overall probability of LBP after virtual implant placement was 21.6%. There is statistically significant higher prevalence of LBP at canine (28.5%) and CRDAP class II (29.2%) regions (p < 0.001). After adjusting confounding variables, CRDAP class II and class IV regions are more likely to have LBP when compared with CRDAP class I (control) regions (p < 0.01). The risk of LBP at canine site is 6.31 times more likely than at the central incisor (control) (p < 0.01). Conclusions Using a virtual immediate implant placement technique, the prevalence of LBP is significantly higher at the mandibular canine site and thin radicular dentoalveolar phenotype in the anterior mandibular region.

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