scholarly journals Union Rate on Hinge Side after Open-Door Laminoplasty Using Maxillofacial Titanium Miniplate

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Koopong Siribumrungwong ◽  
Theerasan Kiriratnikom ◽  
Boonsin Tangtrakulwanich
Keyword(s):  
Computed Tomography ◽  
Cervical Canal ◽  
Open Door ◽  
Union Rate ◽  
Japanese Orthopedic Association ◽  
Computed Tomography Scans ◽  
Before And After ◽  
The Mean ◽  
Scan Data ◽  
Titanium Miniplate

Background. One of the important complications of open-door laminoplasty is a premature laminoplasty closure. In order to prevent premature laminoplasty closure many techniques have been described and a titanium miniplate is one of the instruments to maintain cervical canal expansion. This study was performed to evaluate the effectiveness of titanium miniplates on the union rate for open-door laminoplasty.Materials and Methods. We performed open-door laminoplasty in 68 levels of fourteen patients using maxillofacial titanium miniplates. Axial computed tomography scans were obtained at 6 months postoperatively to evaluate the union rates of the hinge side. The Japanese Orthopedic Association (JOA) score was used to compare the clinical outcomes before and after surgery.Results. Computed tomography scan data was available on 68 levels in 14 patients. There were no premature closures of the hinge or miniplate dislodgements. The union rate on the hinge side was 70.5% (48/68). The mean JOA score increased significantly from 7.0 before surgery to 10.2, 12.2, and 13.0 after surgery at 1, 3, and 6 months, respectively.Conclusion. Open-door laminoplasty using maxillofacial titanium miniplates can provide union rates comparable to other techniques. It can maintain canal expansion without failures, dislodgements, and premature closures.

scholarly journals Efficacy of a hydrogel spacer in three-dimensional conformal radiation therapy for prostate cancer

2020 ◽  
Vol 50 (3) ◽  
pp. 303-309 ◽  
Author(s):  
Mami Ogita ◽  
Hideomi Yamashita ◽  
Subaru Sawayanagi ◽  
Wataru Takahashi ◽  
Keiichi Nakagawa
Keyword(s):  
Prostate Cancer ◽  
Computed Tomography ◽  
High Risk ◽  
Seminal Vesicle ◽  
Three Dimensional ◽  
Conformal Radiotherapy ◽  
Computed Tomography Scans ◽  
Before And After ◽  
Three Dimensional Conformal Radiotherapy ◽  
Dose Constraints

Abstract Objectives We aimed to compare the dose constraints fulfillment rate of the three-dimensional conformal radiotherapy treatment plan before and after a hydrogel spacer insertion. Methods The planning computed tomography scans of 39 patients who received stereotactic body radiotherapy for prostate cancer were used. All patients inserted a hydrogel spacer and underwent computed tomography scans before and after spacer insertion. The three-dimensional conformal radiotherapy plans according to NCCN classification, low-, intermediate- and high-risk, were made for each patient. Clinical target volume included prostate and seminal vesicle 2 cm for high risk, prostate and seminal vesicle 1 cm for intermediate risk and prostate only for low risk. Three-dimensional conformal radiotherapy including a seven-field conformal technique with 76 Gy in 38 fractions. Dose constraints for rectum and bladder were V70 Gy ≤ 15%, V65 Gy ≤ 30% and V40 Gy ≤ 60%. Results Among 39 patients, 35 (90%), 19 (49%) and 13 (33%) and 38 (97%), 38 (97%) and 34 (87%) patients before and after the spacer insertion fulfilled rectum dose constraints for low-, intermediate- and high-risk plans, respectively. A hydrogel spacer significantly reduced rectum dose and improved the rectum dose constraints fulfillment rate in intermediate (P < 0.01) and high (P < 0.01), but no difference was found in low-risk plan (P = 0.25). On multivariate analysis, spacer use was associated with the higher rectum dose constraints fulfillment rate. Conclusions A hydrogel spacer reduced rectum dose and improved the dose constraints fulfillment rate in three-dimensional conformal radiotherapy plan. Although IMRT is the standard treatment, 3D-CRT using a hydrogel spacer may be a treatment option.

scholarly journals The correlation between the teardrop angle and anterior lunate facet displacement in plating distal radial fractures

2019 ◽  
Vol 44 (5) ◽  
pp. 462-467 ◽  
Author(s):  
Teun Teunis ◽  
Sjoerd Meijer ◽  
Jesse Jupiter ◽  
Daniel Rikli ◽  
Keyword(s):  
Computed Tomography ◽  
Surface Area ◽  
Plate Fixation ◽  
Three Dimensional ◽  
Anterior Plate ◽  
Distal Radial Fractures ◽  
Computed Tomography Scans ◽  
Before And After ◽  
Anterior Plating ◽  
Three Dimensional Models

This study aimed to determine the association of teardrop angle and anteroposterior distance with anterior lunate facet displacement and articular congruity before and after anterior plating of distal radial fractures. We included 36 patients with complete intra-articular distal radial fractures with separate anterior lunate facet fragments. On radiographs we determined the teardrop angle and anteroposterior distance. On digital three-dimensional models we measured proximal-distal, anteroposterior and ulnoradial anterior lunate facet displacement, and we outlined the gap surface area. Preoperatively, teardrop angle was highly associated with the extent of anterior lunate facet displacement. Increased anteroposterior distance was mainly associated with articular incongruity after anterior plate fixation. This information may reduce the need of preoperative computed tomography scans in fractures with a normal tear drop angle. This is particularly useful in low-resource settings.

Frontonasal and Craniofrontonasal Dysplasia: Preoperative Quantitative Description of the Cranio-Orbito-Zygomatic Region Based on Computed and Conventional Tomography

1994 ◽  
Vol 31 (2) ◽  
pp. 97-105 ◽  
Author(s):  
Stephanie M Moffat ◽  
Jeffrey C. Posnick ◽  
Gaylene E. Pron ◽  
Derek C. Armstrong
Keyword(s):  
Computed Tomography ◽  
Clinical Presentation ◽  
Matched Control ◽  
Quantitative Description ◽  
Frontonasal Dysplasia ◽  
Orbital Wall ◽  
Computed Tomography Scans ◽  
Conventional Tomography ◽  
The Mean ◽  
Medial Orbital Wall

The unoperated cranio-orbito-zygomatic complex of 18 children (mean 4.7 years) with frontonasal dysplasia (FND) and 12 children (mean 1.1 years) with craniofrontonasal dysplasia (CFND) was quantified by 15 standard measurements performed on either computed tomography scans or facial tomograms. The results were compared with age-matched control values. In the FND group, the mean anterior interorbital and mid-interorbital distances were significantly increased at 148% and 118% of normal, and in the CFND patients, at 177% and 140% of normal. Excessive medial orbital wall protrusion (mean, 145% of normal in FND and 177% in CFND), shortened zygomatic arch lengths (mean, 94% of normal In FND and 91% in CFND), and reduced cephalic lengths (mean, 96% of normal in FND and 83% in CFND) were all observed. An expanded interzygomatic buttress distance was documented only in the CFND group, at 111% of normal. The clinical presentation of craniofacial deformities such as FND and CFND can be objectively described by a numerical analysis of the bony pathology.

scholarly journals Comparison of Obturation Removal Efficiency from Straight Root Canals with ProTaper Gold or Reciproc Blue: A Micro-Computed Tomography Study

2020 ◽  
Vol 9 (4) ◽  
pp. 1164 ◽  
Author(s):  
Vicente Faus-Matoses ◽  
Cristina Pasarín-Linares ◽  
Ignacio Faus-Matoses ◽  
Federico Foschi ◽  
Salvatore Sauro ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Removal Efficiency ◽  
Continuous Wave ◽  
Descriptive Analysis ◽  
Nonparametric Tests ◽  
Micro Computed Tomography ◽  
Human Teeth ◽  
Root Canals ◽  
Before And After ◽  
The Mean

Background: The objective was to evaluate the efficiency of ProTaper Gold (PTG) and Reciproc Blue (RB) NiTi files in obturation material removal from straight root canals assessed by micro-computed tomography. Methods: Fifty-two anterior human teeth were shaped with a PTG rotary system until F2 (25/.08). Specimens were obturated with a continuous wave of condensation technique. For retreatment, specimens were randomly distributed in two experimental groups: PTG group (F4 file) and RB (R40 file). Micro-CT scans were performed before and after retreatment procedures. The percentage of the remaining obturation material compared to the original volume was calculated, as well as the retreatment time. The presence of separated files was recorded. A descriptive analysis was carried out, and nonparametric tests were employed. Results: The mean percentages of remaining obturation material in the PTG group and the RB group were 4.14 ± 4.30% and 4.18 ± 4.29%, respectively. The mean retreatment times for the PTG and RB groups were 144 ± 51 and 163 ± 88 s, respectively. There were no statistically significant differences, neither in removal efficiency (p > 0.05) nor in retreatment time (p > 0.05), between the two groups. The coronal and middle thirds presented significantly more remaining obturation material than the apical third (p < 0.05). No file separation occurred. Conclusions: ProTaper Gold and Reciproc Blue present with comparable efficiency in removing the obturation material, with a similar mean retreatment time.

Stackable Carbon Fiber Cages for Thoracolumbar Interbody Fusion After Corpectomy: Long-term Outcome Analysis

Neurosurgery ◽  
2011 ◽  
Vol 68 (3) ◽  
pp. 810-819 ◽  
Author(s):  
Robert F Heary ◽  
Arvin Kheterpal ◽  
Antonios Mammis ◽  
Sanjeev Kumar
Keyword(s):  
Computed Tomography ◽  
Carbon Fiber ◽  
Vertebral Body ◽  
Additional Patient ◽  
Preoperative Imaging ◽  
Plain Films ◽  
Computed Tomography Scans ◽  
The Mean

Abstract BACKGROUND: Reconstruction of the thoracolumbar spine after corpectomy is a challenge for fractures, infections, and tumors. OBJECTIVE: To analyze fusion rates, clinical outcomes, and the percent of vertebral body coverage achieved by using stackable carbon fiber–reinforced polyetheretherketone cages in thoracolumbar corpectomies, and to measure the actual size of the cages and compare this measurement with the size of the vertebra(e) replaced by the cage. METHODS: A retrospective study of 40 patients who underwent thoracolumbar corpectomies was performed. Preoperative imaging included plain films, computed tomography scans, and magnetic resonance imaging. Postoperatively, plain films and computed tomography scans were obtained, and the width of decompression and cross-sectional area of the cage were measured. The ratio of the area of the cage to the calculated area of the replaced vertebral body was used to determine the percent of vertebral body coverage. RESULTS: The mean follow-up period was 43 months. Successful fusion was observed in 39 patients. One patient experienced cage subsidence with kyphosis. One additional patient incurred a neurological complication that was corrected without long-term consequence. The mean correction of sagittal alignment was 10°, and the mean width of bony decompression was 20 mm. The mean ratio of the area of the carbon fiber cage to the area of the resected vertebral body was 60%. CONCLUSION: Stackable carbon fiber cages are effective devices for achieving thoracolumbar fusions. No failures of the cages occurred over long-term follow-up. Excellent clinical and radiographic results were achieved by covering a mean of 60% of the vertebral body with the cage.

scholarly journals Comparison of Imaging Softwares for Upper Airway Evaluation: Preliminary Study

2018 ◽  
Vol 11 (4) ◽  
pp. 273-277
Author(s):  
Guilherme dos Santos Trento ◽  
Lucas Borin Moura ◽  
Rubens Spin-Neto ◽  
Philipp Christian Jürgens ◽  
Marisa Aparecida Cabrini Gabrielli ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Digital Imaging ◽  
Upper Airway ◽  
Cone Beam ◽  
Maxillary Expansion ◽  
Accuracy And Precision ◽  
Significant Difference ◽  
Computed Tomography Scans ◽  
The Mean ◽  
Preliminary Study

The interest about upper airway evaluation has increased lately. Therefore, many softwares have been developed aiming to improve and facilitate the analysis of airway volume. The objective of this study was to compare two different softwares packages, Mimics and Dolphin, in their accuracy and precision in upper airway space measurements. Preoperative cone beam computed tomography scans of nine nonsyndromic patients submitted to surgically assisted rapid maxillary expansion were included in this study. The imaging exams were converted to DICOM (digital imaging and communications in medicine) files and imported to the softwares. The mean volume for the Dolphin group (G1) was 10.791 cm3 (SD = 4.269 cm3) and for the Mimics group (G2) was 10.553 cm3 (SD = 4.564 cm3). There was no statistically significant difference between the two groups ( p = 0.105).

scholarly journals Root Canal Transportation after Root Canal Preparation with ProTaper Next, WaveOne Gold, and Twisted Files

2020 ◽  
Vol 9 (11) ◽  
pp. 3661
Author(s):  
Wojciech Eliasz ◽  
Kinga Kubiak ◽  
Wojciech Poncyljusz ◽  
Anna Surdacka
Keyword(s):  
Computed Tomography ◽  
Root Canal ◽  
Mean Value ◽  
Root Canal Preparation ◽  
Movement Kinematics ◽  
Root Canals ◽  
Adaptive Motion ◽  
Computed Tomography Scans ◽  
Canal Transportation ◽  
The Mean

Background: Root canal preparation during endodontic treatment may be associated with various complications, including a change in the original pathway of the root canal lumen. The aim of our study was to determine whether files of similar sizes that use various movement kinematics (rotary, reciprocal, adaptive motion) cause root canal transportation, and whether the differences between such systems are statistically significant. Methods: The degree of root canal transportation (DT) was calculated with the use of computed tomography scans for 3 groups of teeth (for each group: n = 20) in which the root canals were prepared using either rotary (ProTaper Next—PTN), reciprocal (WaveOne Gold—WOG), or adaptive movement (Twisted Files—TF) instruments. Results: For rotary ProTaper Next instruments, the mean value of the DT index was 0.0795 (SD = 0.0179) for 3 mm from the apex, 0.09 (SD = 0.0262) for 6 mm from the apex, and 0.106 (SD = 0.0221) for 9 mm from the apex. For reciprocal WaveOne Gold Primary instruments, the mean value of the DT index was 0.0355 (SD = 0.015) for 3 mm from the apex, 0.061 (SD = 0.02) for 6 mm from the apex, and 0.08 (SD = 0.25) for 9 mm from the apex. For Twisted Files, the mean value of the DT index was 0.05 (SD = 0.03) for 3 mm from the apex, 0.092 (SD = 0.17) for 6 mm from the apex, and 0.08 (SD = 0.02) for 9 mm from the apex. Conclusions: The use of PTN, WOG, and TF files resulted in root canal transportation to a different degree. The use of rotary PTN files produced the most transported preparation, whereas the use of WOG files produced the conservative root canal preparation that allowed the retention of the original shape of the root canal.

scholarly journals Using Computed Tomography Scans and Patient Demographic Data to Estimate Thoracic Epidural Space Depth

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Alyssa Kosturakis ◽  
Jose Soliz ◽  
Jackson Su ◽  
Juan P. Cata ◽  
Lei Feng ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Epidural Catheter ◽  
Epidural Space ◽  
Depth Measurement ◽  
Thoracic Epidural ◽  
Patient Demographics ◽  
Loss Of Resistance ◽  
Computed Tomography Scans ◽  
The Mean ◽  
Epidural Catheters

Background and Objectives. Previous studies have used varying methods to estimate the depth of the epidural space prior to placement of an epidural catheter. We aim to use computed tomography scans, patient demographics, and vertebral level to estimate the depth of the loss of resistance for placement of thoracic epidural catheters. Methods. The records of consecutive patients who received a thoracic epidural catheter were reviewed. Patient demographics, epidural placement site, and technique were collected. Preoperative computed tomography scans were reviewed to measure the skin to epidural space distance. Linear regression was used for a multivariate analysis. Results. The records of 218 patients were reviewed. The mean loss of resistance measurement was significantly larger than the mean computed tomography epidural space depth measurement by 0.79 cm (p<0.001). Our final multivariate model, adjusted for demographic and epidural technique, showed a positive correlation between the loss of resistance and the computed tomography epidural space depth measurement (R2=0.5692, p<0.0001). Conclusions. The measured loss of resistance is positively correlated with the computed tomography epidural space depth measurement and patient demographics. For patients undergoing thoracic or abdominal surgery, estimating the loss of resistance can be a valuable tool.

scholarly journals THREE-DIMENSIONAL MODEL PRINTING IN ORAL AND MAXILLOFACIAL RECONSTRUCTIVE SURGERY: COMPARISON OF THREE-DIMENSIONAL MODELS AND MULTISLICE COMPUTED TOMOGRAPHY SCANS

2018 ◽  
Vol 9 ◽  
pp. 74
Author(s):  
Adhitya Latief ◽  
Pradono Suhardi ◽  
Cholid Badri
Keyword(s):  
Computed Tomography ◽  
Multislice Computed Tomography ◽  
Three Dimensional ◽  
3D Models ◽  
Three Dimensional Model ◽  
Surgical Guidance ◽  
Accuracy And Precision ◽  
Computed Tomography Scans ◽  
Scan Data ◽  
Three Dimensional Models

Objective: The objective of this study is to compare fabrication of commonly used three-dimensional (3D) models with original multislice computed tomography (MSCT) scan data for accuracy and precision in reconstruction surgery.Methods: MSCT data from 10 samples are processed and manufactured to be 3D models. Both groups are then measured and analyzed for the purpose of comparison.Results: The average mandibular measurement difference between 3D models and MSCT scans is 0.26 mm more <2%. The final results of the comparison reveal high accuracy in 3D models compared to MSCT scan data.Conclusion: The 3D model could be considered as surgical guidance for maxillofacial reconstruction surgery since it yields highly accurate results.

scholarly journals Pulmonary infection caused by Mycobacterium kansasii: findings on computed tomography of the chest

2016 ◽  
Vol 49 (4) ◽  
pp. 209-213 ◽  
Author(s):  
Roberto Mogami ◽  
Telma Goldenberg ◽  
Patricia Gomes Cytrangulo de Marca ◽  
Fernanda Carvalho de Queiroz Mello ◽  
Agnaldo José Lopes
Keyword(s):  
Computed Tomography ◽  
Retrospective Study ◽  
Pulmonary Infection ◽  
Airway Disease ◽  
Architectural Distortion ◽  
Mycobacterium Kansasii ◽  
Computed Tomography Scans ◽  
Large Airways ◽  
The Mean

Abstract Objective: To describe the main tomography findings in patients diagnosed with pulmonary infection caused by Mycobacterium kansasii. Materials and Methods: Retrospective study of computed tomography scans of 19 patients with pulmonary infection by M. kansasii. Results: Of the 19 patients evaluated, 10 (52.6%) were male and 9 (47.4%) were female. The mean age of the patients was 58 years (range, 33-76 years). Computed tomography findings were as follows: architectural distortion, in 17 patients (89.5%); reticular opacities and bronchiectasis, in 16 (84.2%); cavities, in 14 (73.7%); centrilobular nodules, in 13 (68.4%); small consolidations, in 10 (52.6%); atelectasis and large consolidations, in 9 (47.4%); subpleural blebs and emphysema, in 6 (31.6%); and adenopathy, in 1 (5.3%). Conclusion: There was a predominance of cavities, as well as of involvement of the small and large airways. The airway disease was characterized by bronchiectasis and bronchiolitis presenting as centrilobular nodules.

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