CEMENT DISTRIBUTION AND CARBONATE MINERAL STABILIZATION IN PLEISTOCENE LIMESTONES OF HOGSTY REEF, BAHAMAS

1985 ◽  
pp. 153-168 ◽  
Author(s):  
BERNARD J. PIERSON ◽  
EUGENE A. SHINN
Keyword(s):  
Carbonate Mineral ◽  
Cement Distribution

scholarly journals Influence of bone cement distribution on outcomes following percutaneous vertebroplasty: a retrospective matched-cohort study

2021 ◽  
Vol 49 (7) ◽  
pp. 030006052110222
Author(s):  
Ling Mo ◽  
Zixian Wu ◽  
De Liang ◽  
Linqiang Y ◽  
Zhuoyan Cai ◽  
...  
Keyword(s):  
Cohort Study ◽  
Bone Cement ◽  
Percutaneous Vertebroplasty ◽  
Vertebral Compression Fractures ◽  
Matched Cohort ◽  
Matched Cohort Study ◽  
Cement Distribution ◽  
Group A ◽  
Group B

Objective To evaluate the influence of insufficient bone cement distribution on outcomes following percutaneous vertebroplasty (PVP). Methods This retrospective matched-cohort study included patients 50–90 years of age who had undergone PVP for single level vertebral compression fractures (VCFs) from February 2015 to December 2018. Insufficient (Group A)/sufficient (Group B) distribution of bone cement in the fracture area was assessed from pre- and post-operative computed tomography (CT) images. Assessments were before, 3-days post-procedure, and at the last follow-up visit (≥12 months). Result Of the 270 eligible patients, there were 54 matched pairs. On post-operative day 3 and at the last follow-up visit, significantly greater visual analogue scale (VAS) pain scores and Oswestry Disability Index (ODI) scores were obtained in Group B over Group A, while kyphotic angles (KAs) and vertebral height (VH) loss were significantly larger in Group A compared with Group B. Incidence of asymptomatic cement leakage and re-collapse of cemented vertebrae were also greater in Group A compared with Group B. Conclusions Insufficient cement distribution may relate to less pain relief and result in progressive vertebral collapse and kyphotic deformity post-PVP.

scholarly journals Surfactant Inhibition Mechanisms of Carbonate Mineral Dissolution in Shale

2021 ◽  
pp. 126857
Author(s):  
Kyung Tae Kim ◽  
Mantha Sai Pavan Jagannath ◽  
Gregory M. Su ◽  
Guillaume Freychet ◽  
Tongzhou Zeng ◽  
...  
Keyword(s):  
Mineral Dissolution ◽  
Carbonate Mineral ◽  
Surfactant Inhibition

The crystal chemistry of the uranyl carbonate mineral grimselite, (K, Na)3Na[(UO2)(CO3)3](H2O), from Jáchymov, Czech Republic

2012 ◽  
Vol 76 (3) ◽  
pp. 443-453 ◽  
Author(s):  
J. Plášil ◽  
K. Fejfarová ◽  
R. Skála ◽  
R. Škoda ◽  
N. Meisser ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Czech Republic ◽  
Structure Refinement ◽  
Unit Cell ◽  
Carbonate Mineral ◽  
X Ray Diffraction ◽  
The Czech Republic ◽  
Cell Parameters ◽  
Uranyl Carbonate ◽  
Diffraction Peaks

AbstractTwo crystals of the uranyl carbonate mineral grimselite, ideally K3Na[(UO2)(CO3)3](H2O), from Jáchymov in the Czech Republic were studied by single-crystal X-ray diffraction and electron-probe microanalysis. One crystal has considerably more Na than the ideal chemical composition due to substitution of Na into KO8 polyhedra; the composition of the other crystal is nearer to ideal, and similar to synthetic grimselite. The presence of Na atoms in KO8 polyhedra, which are located in channels in the crystal structure, reduces their volume, and as a result the unit-cell volume also decreases. Structure refinement shows that the formula for the sample with the anomalously high Na content is (K2.43Na0.57)Σ3.00Na[(UO2)(CO3)3](H2O). The unit-cell parameters, refined in space group P2c, are a = 9.2507(1), c = 8.1788(1) Å, V = 606.14(3) Å3 and Z = 2. The crystal structure was refined to R1 = 0.0082 and wR1 = 0.0185 with a GOF = 1.33, based on 626 observed diffraction peaks [Iobs>3σ(I)].

Quantitative Determination of some Carbonate Minerals in Greenschist Facies Meta-volcanic Rocks

1972 ◽  
Vol 9 (1) ◽  
pp. 36-42 ◽  
Author(s):  
Calvert C. Bristol
Keyword(s):  
Standard Deviation ◽  
Quantitative Determination ◽  
Volcanic Rocks ◽  
Internal Standard ◽  
Greenschist Facies ◽  
Carbonate Mineral ◽  
Mineral Contents ◽  
X Ray ◽  
Fine Grained

X-ray powder diffraction methods, successful in quantitative determination of silicate minerals in fine-grained rocks, have been applied to the determination of calcite, dolomite, and magnesite in greenschist facies meta-volcanic rocks. Internal standard graphs employing two standards (NaCl and Mo) have been determined.Carbonate mineral modes (calcite and dolomite) for 6 greenschist facies meta-volcanic rocks obtained by the X-ray powder method have been compared to normative carbonate mineral contents calculated for the same rocks. This comparison showed a maximum variation of 7.7 wt.% between the X-ray modes and the normative carbonate mineral contents of the rocks. Maximum standard deviation for the X-ray modes of these rocks was equivalent to 4.4 wt.%.

scholarly journals Factors and Strategies for Post-Vertebroplasty Residual Pain from Thoracolumbar Osteoporotic Vertebral Compression Fractures (OVCF): a systematic review.

2021 ◽  
Author(s):  
Binbin Tang ◽  
Kang Liu ◽  
Lianguo Wu ◽  
Xiaolin Shi
Keyword(s):  
Systematic Review ◽  
Bone Cement ◽  
Vertebral Compression Fractures ◽  
Osteoporotic Vertebral Compression Fractures ◽  
Related Factors ◽  
Residual Pain ◽  
Compression Fractures ◽  
Short Period ◽  
Cement Distribution ◽  
High Level

Abstract Purpose Insignificant pain relief (IPR) in short period after vertebroplasty is common, which often disturb doctors and affect patients Therefore, we reviewed systematically relative articles and attempted to get meaningful evidence on factors and strategies for IPR.Methods PubMed, Web of Science, Embase, CNKI, WanFang, and VIP were searched for literatures treating the osteoporotic vertebral compression fractures (OVCFs) with vertebroplasty and assessing the clinical efficacy.Results 817 references were electronically retrieved, 81 full-text papers were screened and 41 studies were included. Twenty-two trials presented factors on IPR, mainly including bone cement related, operation related and patient-related factors. Nineteen studies showed strategies on residual pain, including improving osteoporosis, reforming surgical operation and add other therapies. 16 prospective, 20 retrospective and 5 meta-analyses consisted the systematic review. The date from included studies point to different results, with less risk of bias, were needed to clarify the factors and strategies for residual pain.Conclusions Bone cement distribution and operation error are highly related to the post-vertebroplasty residual pain. Many therapeutic methods could improve pain and rehabilitate function but lacking more high-level evidence due to the insufficient trails.

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