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The Thickness of Facial Alveolar Bone Overlying Healthy Maxillary Anterior Teeth.
No full textBACKGROUND:
A facial bone (<2 mm) overlying maxillary anterior teeth may be prone to resorptive processes after extraction and immediate implant placement. A thin bone contributes to risk of bone fenestration, dehiscence, and soft-tissue recession. This study measures the distance between the cemento-enamel junction (CEJ) and alveolar bone crest and the thickness of facial alveolar bone at points 1 to 5 mm from the bone crest for the six maxillary anterior teeth.
METHODS:
Sixty-six tomographic scans (31 males and 35 females; aged 17 to 69 years; mean age: 39.9 years) of intact anterior maxilla were randomly selected and evaluated by two calibrated and independent examiners (MG and TP).
RESULTS:
A high variation of CEJ-bone crest (0.8 to 7.2 mm) was detected. A significantly larger CEJ-bone crest was measured in smokers (P <0.05) and patients who were ≥50 years old (P <0.05). The average bone thickness at 3 mm from the CEJ for the maxillary right central incisor was 1.41 mm and for the maxillary left central incisor was 1.45 mm. For the maxillary right and left lateral incisors, the crestal bone thickness averaged 1.73 and 1.59 mm, respectively. For the maxillary right and left canines, the crestal bone thickness averaged 1.47 and 1.60 mm, respectively.
CONCLUSIONS:
The present study supports the finding of a predominantly thin facial bone overlying the six maxillary anterior teeth. Therefore, it is essential to make informed treatment decisions based on thorough site evaluation before immediate implant placement
la diagnostica radiologica e le nuove metodiche d'immagini in cardiologia dello sport
No full textla diagnostica radiologica e le nuove metodiche d'immagini in cardiologia dello spor
Images in cardiovascular medicine. Intralobar pulmonary sequestration in a 46-year-old woman: findings from multidetector-row computed tomography and magnetic resonance imaging
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Chest pain caused by tracheostomy tube malposition: the importance of choosing the right tube.
No full textWe describe a case of chest pain caused by tracheostomy tube malposition in a 65-year old woman with chronic respiratory failure due to chronic obstructive pulmonary disease. This report highlights the importance of the correct choice of tracheostomy tube devices for mechanically ventilated and/or spontaneously breathing patients
Periprosthetic mineralization changes around femoral stems: a prospective 12-month study with DEXA
No full textOBJECTIVE: The objective was to evaluate bone mineral density (BMD) changes around the proximal femur after implantation of two different anatomical stems. MATERIALS AND METHODS: Thirty-six patients (19 women and 17 men) who underwent total hip replacement were recruited. A Bihapro stem was implanted in 23 patients (with a mean age of 60.9 years) and a Citation stem in 13 patients (with a mean age of 59.7 years). All patients underwent serial radiography of the affected hip (follow-up time: 12 months). Baseline periprosthetic and overall BMD were measured with dual-energy X-ray absorptiometry (DEXA) 1 week and 12 months after hip replacement. Regions of interest (ROIs) were defined according to Gruen's system (ROIs 1-7). RESULTS: All stems were classified as radiographically stable. Bone ongrowth (spot welds) was present in zones 1 and 2 in all patients with the Bihapro stem. The distribution of baseline densities was very similar in the two groups of patients. In Bihapro implants a significant increment of mineralisation was present in ROI 1 after 1 year; ROIs 2 to 7 showed no density variation. The following observations were made regarding the Citation implants: no increment in density was shown in ROI 1; the differences in densities among the ROIs were significant after 1 year in the global evaluation (p = 0.004); the comparison between the single ROIs showed decalcification in ROIs 2 and 7 and a density increment in ROI 5. CONCLUSIONS: Bihapro stems appear to achieve adequate proximal fixation, avoiding the "stress shielding" phenomenon
Unusual central venous catheter malposition into the left internal mammary vein: a case report
No full textA rare case of life-threatening giant plexiform schwannoma
No full textA 28-year-old woman with idiopathic scoliosis presented
with a cervical mass and progressive gait disturbance over the
course of 2 years. Examination demonstrated mild spastic
paraplegia, hypoesthesia with upper level at T5 and severe
respiratory failure requiring assisted ventilation. Magnetic
resonance imaging showed multiple thoracic masses compressing
left lung, trachea, and spinal cord (Figure). Surgical
resection was performed. Through C5–T1 laminectomy, the
intradural part of the neoplasia was completely removed, and
the extradural part was enucleated as much as possible. After
surgery, the respiratory function improved. Histologic pattern
and S100 protein diffuse reactivity were consistent with
plexiform schwannoma, a rare benign cutaneous variation of
schwannoma [1]. Although deep-seated plexiform schwannomas
involving spinal cord are occasionally described [2],
this case is undoubtedly impressive because of the lifethreatening
tumor size (Figure)
Total anomalous pulmonary venous return with connection to the supradiaphragmatic inferior vena cava: assessment and diagnosis by multidetector computed tomography
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CT-guided fine-needle ago-biopsy of pulmonary nodules: predictive factors for diagnosis and pneumothorax occurrence
No full textObjective: To evaluate variables that could predict diagnosis during CT-guided fine-needle aspiration. Methods: Data from 249 patients who underwent FNAB from January 2010 to December 2012 were analyzed in a retrospective observational study. Results: Mean age was 66.7 ± 11.5 years, male/female ratio 158/91 (63 vs. 37 %). The nodules were in right lung in 123 patients (49 %), in left lung in 126 patients (51 %), the upper, lower and middle lobe localizations were, respectively in 122 (49 %), 100 (40 %) and 17 (6 %) patients. Mean nodule-chest wall distance was 63.89 ± 21.38 mm. The tumor location, the needle diameter, the presence of necrosis or cavitation, the node-chest wall distance and the number of passages were not related to the diagnostic outcome (p = NS). The nodule diameter was predictive of diagnosis. Odds ratio for a 10-30 mm tumor was 2.51 (95 % OR: 1.24–5.08, p value = 0.011), the odds ratio for a 30–50 mm tumor was 2.39 (95 % OR: 1.22–4.69, p value = 0.011), and the odds ratio for a tumor larger than 50 mm was 4.44 (95 % OR: 1.89–10.44, p value = 0.001). Post-procedure pneumothorax occurred in 62 cases (25 %). The determinant factors for pneumothorax occurrence were emphysema, odds ratio 6.87 (95 % CI 1.07–44.10, p value = 0.04), and the number of pleural passages, odds ratio of 5.47 (95 % OR: 1.92–15.58), 7.44 (95 % OR: 2.58–21.5), 6.13 (95 % OR: 2.07–18.11) p value = 0.001 for one, two, three or more of three passages, respectively. Conclusions: In our experience, nodule size is the most important diagnostic factor during fine-needle aspiration, while the number of passages and the presence of emphysema constitute risk factors for pneumothorax occurrence
DENSITY-BASED MDCT QUANTIFICATION OF LOBAR LUNG VOLUMES: A STUDY OF INTER- AND INTRAOBSERVER REPRODUCIBILITY
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