scholarly journals Clinical and Radiographic Findings and Usefulness of Computed Tomographic Assessment in Two Children with Regional Odontodysplasia

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Junko Matsuyama ◽  
Ray Tanaka ◽  
Futabako Iizawa ◽  
Tomiko Sano ◽  
Shoko Kinoshita-Kawano ◽  
...  
Keyword(s):  
Developmental Disorder ◽  
Hard Tissue ◽  
Connective Tissues ◽  
Dental Tissue ◽  
Attenuation Coefficients ◽  
Tooth Formation ◽  
Radiographic Findings ◽  
Computed Tomographic ◽  
Regional Odontodysplasia ◽  
Ghost Teeth

Regional odontodysplasia is a rare, severe, and nonhereditary developmental disorder in tooth formation and involves epithelial and mesenchymal-derived dental tissue. On radiographs, affected teeth have an abnormal morphology, a hypoplastic crown, and only a faint outline of hard tissue, a condition termed “ghost teeth.” We report clinical and radiographic findings from two children with regional odontodysplasia. Using computed tomography (CT), we calculated attenuation coefficients (i.e., Hounsfield units) for affected teeth and assessed the condition of dental follicles. To measure density, regions of interest were delimited and CT values were calculated. In our two patients, the CT values for enamel were lower in affected teeth than in sound teeth, while CT values for dentin were similar for affected and sound teeth. The average CT value for dental follicles in affected teeth was about 65 to 120, which suggests that dense fibrous connective tissues or hard tissue-like structures might be present in dental follicles. Analysis of CT values may be quite useful in the diagnosis and treatment of regional odontodysplasia.

Regional Odontodysplasia: Report of a case

2005 ◽  
Vol 29 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Levent Özer ◽  
Serap Çetiner ◽  
Ersan Ersoy
Keyword(s):  
Male Patient ◽  
Permanent Dentition ◽  
Developmental Anomaly ◽  
Consecutive Series ◽  
Hard Tissue ◽  
Mandibular Arch ◽  
Regional Odontodysplasia ◽  
Maxilla And Mandible ◽  
Ghost Teeth ◽  
Maxillary Arch

Regional odontodysplasia is a rare developmental anomaly involving both mesodermal and ectodermal dental components in groups of contigous teeth. RO affects the primary and permanent dentition in the maxilla and mandible or both jaws. Generally, it is localized in only one arch. The maxillary arch is affected more often than the mandibular arch. The affected teeth tend to be in a consecutive series that does not cross the midline, although some cases do not follow this pattern, as in the present case, have been documented. Radiogaphically wide pulp chambers and thin poorly defined hard tissue outlines described as a "ghost teeth" appearance, are typical features. A case of regional odontodysplasia in a 5 year old male patient is presented. The clinical and radiogaphical findings of this developmental anomaly and treatment are described.

scholarly journals Apexification Using Mineral Trioxide Aggregate and Modified Internal Matrix: A Case Report

2021 ◽  
Vol 33 (2) ◽  
Keyword(s):  
Case Report ◽  
Mineral Trioxide Aggregate ◽  
Tissue Formation ◽  
Enamel Hypoplasia ◽  
Hard Tissue ◽  
Radiographic Evidence ◽  
Radiographic Findings ◽  
Immature Teeth ◽  
Patient Reported ◽  
Treatment Alternatives

When pulpal necrosis occurs in immature teeth, one of the treatment alternatives is the creation of an artificial apical barrier through the placement of an apical plug. However, controlling the mineral trioxide aggregate (MTA) during placement has proven difficult. Several studies evaluated the use of resorbable barriers to act as an internal matrix to prevent accidental extrusion of MTA. The aim of this case report was to document the effectiveness of Surgicel as a modified internal matrix for proper placement of MTA during management of immature teeth with necrotic pulp using the apical plug technique. A 12-year-old female patient reported with the chief complaint of a badly mutilated lower right second premolar. The tooth suffered enamel hypoplasia and had a defective coronal structure. It was asymptomatic except for slight tenderness to percussion. Based on the clinical and radiographic findings, a diagnosis of pulpal necrosis with symptomatic apical periodontitis was made. The 3- and 6-month followup showed radiographic evidence of continued root and hard tissue formation. Based on these findings, we infer that Surgicel can be used as a modified internal matrix to prevent extrusion of the MTA into the periapical area and allow for proper MTA placement. Keywords: Apexification; Apical plug; Mineral trioxide aggregate; Calcium hydroxide; Surgicel; Modified internal matrix

Endoscopic Management of Postbariatric Fistulae and Leaks

2015 ◽  
Author(s):  
Yana Cavanagh ◽  
Sohail N. Shaikh
Keyword(s):  
Bariatric Surgery ◽  
Diagnostic Algorithm ◽  
Therapeutic Endoscopy ◽  
Late Complications ◽  
Endoscopic Management ◽  
High Morbidity ◽  
Management Options ◽  
Radiographic Findings ◽  
Computed Tomographic ◽  
American Society

The number of bariatric procedures performed annually is increasing along with the number of complications. Gastrointestinal leak after bariatric surgery generally portends high morbidity and mortality, and its management depends on clinical and radiographic presentation. A leak is defined as an enteric defect with extravasation of luminal contents. Fistulae are abnormal connections between two epithelialized surfaces, are usually chronic, and may develop from long-standing leaks. Endoscopic therapies may offer an attenuated risk profile compared with surgical intervention and play a growing role in the management of postbariatric complications. Leak resolution may require multiple endoscopic sessions and modalities (e.g., stents, adhesives, plugs, clips, suturing, and VAC-assisted closure); therefore, it is critical to have appropriate follow-up and surveillance after therapeutic endoscopic intervention. This review discusses endoscopic leak and fistula management through endoscopic procedures, addressing indications and candidates for procedure, contraindications, recipient evaluation, and aspects of procedure, including proper timing, equipment, and types. Figures show Roux-en-Y gastric bypass, sleeve gastrectomy, management options for leaks after bariatric surgery, a diagnostic algorithm for leaks, upper gastrointestinal series performed with Gastrografin, and computed tomographic scans that demonstrate extraluminal air extending along the diaphragmatic surface of the spleen and a perisplenic gas and fluid-filled collection on the lateral margin. Tables list complications that follow bariatric surgery; an excerpt from the 2008 American Society for Gastrointestinal Endoscopy Guidelines; recommended equipment for endoscopic defect management; classification system based on duration after bariatric surgery; classification and approach to management based on clinical presentation and radiographic findings; summary of recommendations for pre-endoscopy, index endoscopy, therapeutic endoscopy, and posttherapeutic endoscopy; and early and late complications of stent placement. This review contains 7 highly rendered figures, 7 tables, and 104 references.

scholarly journals Experimental Actinobacillus pleuropneumoniae challenge in swine: Comparison of computed tomographic and radiographic findings during disease

2012 ◽  
Vol 8 (1) ◽  
pp. 47 ◽  
Author(s):  
Carsten Brauer ◽  
Isabel Hennig-Pauka ◽  
Doris Hoeltig ◽  
Falk FR Buettner ◽  
Martin Beyerbach ◽  
...  
Keyword(s):  
Actinobacillus Pleuropneumoniae ◽  
Radiographic Findings ◽  
Computed Tomographic

scholarly journals In-Office Guided Implant Placement for Prosthetically Driven Implant Surgery

2017 ◽  
Vol 10 (3) ◽  
pp. 246-254 ◽  
Author(s):  
Daryoush Karami ◽  
Hamid Reza Alborzinia ◽  
Reza Amid ◽  
Mahdi Kadkhodazadeh ◽  
Navid Yousefi ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Direct Observation ◽  
Three Dimensional ◽  
Hard Tissue ◽  
Tissue Thickness ◽  
Computed Tomographic ◽  
Implant Placement ◽  
Soft Tissue Thickness ◽  
Ct Data ◽  
The Cost

Application of surgical stents for implant placement via guided flapless surgery is increasing. However, high cost, need for some professional machines, and not taking into account the soft-tissue parameters have limited their application. We sought to design and introduce a technique named in-office guided implant placement (iGIP) to decrease the cost by using available devices in office and enhance the applicability of surgical stents. A customized surgical stent was fabricated based on prosthetic, soft- and hard-tissue parameters by taking into account the amount of available bone (using the computed tomographic [CT] data), soft-tissue thickness and contour (using a composite-covered radiographic stent), and position of the final crown (by diagnostic cast wax up and marking the final crown position with composite). The efficacy of iGIP, in terms of the accuracy of the three-dimensional position of the implant placed in the study cast and in patient's mouth, was confirmed by direct observation and postoperative CT. The iGIP can enhance implant placement in the prosthetically desired position in various types of edentulism. Using this technique minimizes the risk of unwanted consequences, as the soft-tissue thickness and contour are taken into account when fabricating a surgical stent.

scholarly journals Synchrotron IR-microspectroscopy-based visualization of molecular and chemical interactions between dental cement, biomimetic composite and native dental tissue

2019 ◽  
pp. 71-78 ◽  
Author(s):  
DL Goloshchapov ◽  
V.M. Kashkarov ◽  
Yu.A. Ippolitov ◽  
I.Yu. Ippolitov ◽  
Jitraporn Vongsvivut ◽  
...  
Keyword(s):  
Calcium Hydroxyapatite ◽  
Human Tooth ◽  
Hard Tissue ◽  
Dental Tissue ◽  
Human Teeth ◽  
Dental Cement ◽  
Biomimetic Material ◽  
Hard Dental Tissue ◽  
Calcium Source ◽  
Ir Microspectroscopy

The low affinity of composite materials for the hard tissue of human teeth poses a challenge to restorative dentists. This study was undertaken to explore molecular and chemical characteristics of the interface between the dental cement, the buffer layer formed from a next generation biomimetic material that mimics the organic mineral composition of human enamel and dentin, and the intact native hard dental tissue. Seven plane-parallel dental slices were analyzed using synchrotron IR microspectroscopy. The obtained absorption spectra of functional molecular groups were organized into cluster maps. This allowed us to identify the intact tissue, the adhesive agent and the biomimetic layer at their interface and to localize and measure concentrations of functional groups involved in the integration of the biomimetic composite into the hard tissue of the human tooth. The proposed biomimetic material is based on nanocrystal carbonate-substituted calcium hydroxyapatite synthesized from a biogenic calcium source and a complex of basic polar amino acids copying the composition of the human tooth and can form a functional bond with hard dental tissue.

scholarly journals Surgical Management of Lesions encountered in the Setting of the Retroaortic Left Brachiocephalic Vein

2021 ◽  
Author(s):  
Ujjwal Chowdhury ◽  
Robert Anderson ◽  
Lakshmi Sankhyan ◽  
Niwin George ◽  
Shikha Goja ◽  
...  
Keyword(s):  
Surgical Planning ◽  
Endovascular Procedures ◽  
Septal Defect ◽  
Clinical Presentation ◽  
Clinical Investigation ◽  
Contrast Echocardiography ◽  
Brachiocephalic Vein ◽  
Radiographic Findings ◽  
Left Brachiocephalic Vein ◽  
Computed Tomographic

The present perspective is a synthesis of 80 published investigations in the setting of a retroaortic left brachiocephalic vein, described in 250 patients. Clinical presentation, radiographic findings, ultrasonographic findings, saline contrast echocardiography, computed-tomographic angiocardiography, magnetic resonance imaging, and angiocardiography provided the diagnostic information used to define the disease entity prior to considering the surgical approach to the associated cardiac anomalies. We have also addressed several issues concerning the influence of isomerism, the establishment of diagnosis, and its importance in various surgical and interventional procedures. Although the retroaortic left brachiocephalic vein is asymptomatic, its recognition during clinical investigation should raise the possibility of an association with other malformations, especially right aortic arch, ventricular septal defect, and anomalies of the outflow tracts. We submit that an increased appreciation of this venous anomaly may facilitate surgical planning, endovascular procedures, placement of central venous lines, and transvenous pacemakers.

Changes in the distribution of tenascin during tooth development

Development ◽  
1987 ◽  
Vol 101 (2) ◽  
pp. 289-296 ◽  
Author(s):  
I. Thesleff ◽  
E. Mackie ◽  
S. Vainio ◽  
R. Chiquet-Ehrismann
Keyword(s):  
Tooth Development ◽  
Polyclonal Antibodies ◽  
Staining Intensity ◽  
Mesenchymal Cells ◽  
Hard Tissue ◽  
Connective Tissues ◽  
Odontoblast Differentiation ◽  
Dental Papilla ◽  
Extracellular Matrix Molecule ◽  
Dental Papilla Cells

Tenascin is an extracellular matrix molecule that was earlier shown to be enriched in embryonic mesenchyme surrounding the budding epithelium in various organs including the tooth. In the present study tenascin was localized by immunohistology throughout the course of tooth development in the mouse and rat using polyclonal antibodies against chick tenascin. The results indicate that tenascin is expressed by the lineage of dental mesenchymal cells throughout tooth ontogeny. The intensity of staining with tenascin antibodies in the dental papilla mesenchyme was temporarily reduced at cap stage when the tooth grows rapidly and undergoes extensive morphogenetic changes. During the bell stage of morphogenesis, the staining intensity increased and tenascin was accumulated in the dental pulp even after completion of crown development and eruption. Tenascin was present in the dental basement membrane at the time of odontoblast differentiation. The dental papilla cells ceased to express tenascin upon differentiation into odontoblasts and tenascin was completely absent from dentin. It can be speculated that the remarkable expression of tenascin in the dental mesenchymal cells as compared to other connective tissues is associated with their capacity to differentiate into hard-tissue-forming cells.

scholarly journals Diagnostic imaging characteristics of ureteral pseudodiverticulosis in three dogs

2018 ◽  
Vol 63 (No. 8) ◽  
pp. 373-378
Author(s):  
S. Lim ◽  
S. Sung ◽  
K. Min ◽  
Y. Cho ◽  
Y. Jung ◽  
...  
Keyword(s):  
Contrast Medium ◽  
Excretory Urography ◽  
Inclusion Criteria ◽  
Radiographic Findings ◽  
Computed Tomographic ◽  
Imaging Characteristics ◽  
Contrast Enhanced Ct ◽  
Contrast Enhanced ◽  
Enhanced Ct

Ureteral pseudodiverticulosis is rarely reported in veterinary medicine. This case study aimed to describe the radiographic, ultrasonographic and computed tomographic findings for dogs with radiologically confirmed ureteral pseudodiverticulosis. Three dogs met the inclusion criteria. Radiographic findings included multiple small, round-shaped mineral opacities located around the periphery of the ureters (3/3), and multiple contrast medium-filled outpouchings that appeared and disappeared when the contrast medium washed in and out on intravenous excretory urography (2/3). The outpouchings were approximately 1 mm in diameter. In the ultrasonographic images, the mineral foci were located adjacent to the ureter, but not within the ureteral lumen (1/3). Contrast-enhanced CT findings were similar to those of excretory urography (2/3). Ureteral pseudodiverticulosis should be considered in the differential diagnosis for old-aged and small-breed dogs with radiopaque materials along the ureteral pathways; excretory urography or contrast-enhanced CT are recommended for a more definitive imaging diagnosis.

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