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Register a new userدراسة عمليات الحصول على فوسفات أحادية الكالسيوم ( العلفية ) من الفوسفات السوري
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Aِl-Baath University رسالة ماجستير
Publication date
2016
fields
Chemistry
and research's language is
العربية
Created by
Shamra Editor
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تزداد يوماً بعد يوم أهمية استخدام الأملاح الفوسفاتية كمضافات علفية ومن هذه الأملاح فوسفات أحادية الكالسيوم
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References used
الدكتور محمد فؤاد الرباط- أساسيات تغذية الحيوانات والدواجن - جامعة دمشق
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Phosphoric acid is one of the most important products in
chemical industry, where it is used in different industries,
such as food and fertilizer industries and so on .
This study focuses on the preparation of phosphoric acid
from Syrian phosphate in the laboratory by using the
hemihydrate method , and determines the best optimal
conditions for preparing this acid using this method .
The objective of the present study was to investigate, in a sub-sinus
bone augmentation model in rabbits, effect of Three Calcium Phosphate
beta at different stages of the osteogenesis process. Histological and
statistical analyses were performed.
Rabbits underwent sinus augmentation procedures using Three Calcium
Phosphate beta (Cerasorb) and Collagen membrane ( Gen Derm ) .
This study aims to know the effect of PRP on bone healing and regeneration after cystoectomy within studying clinical and radiological bone density changes. The research sample comprised 18 patients (14 males, 4 females) (20 cystic lesions in the upp
er jaw,1-3 cm diameter). This sample was divided into 2 similar groups :
The experimental group: Platelets-rich Plasma with Tri-Calcium Phosphate was applied.
The control group: only Tri-Calcium Phosphate, without Platelets-rich Plasma, was applied.
Both groups were observed clinically and radiologically. According to radiological observation, the digital panoramic radiographs were taken before, immediately after surgery, after 3 months, and after 6 months, respectively. Bone density measurements were done through Digora® digital program.
The present study showed that there is no statistical difference between the experimental group & the control group, regarding Pain Index and Infection Index; while there was a statistical difference between the experimental group & the control group, regarding bone density after 3 and 6 months after surgery.
Within the limitations of the present study, the application of autologous platelets-rich plasma (PRP) accelerates bone regeneration after cystoectomy.
Background: socket preservation is a main therapeutic procedure to prevent severe
marginal bone resorption after tooth extraction. The aim of this study is to investigate if
there is any difference in the amount of new bone formation 4 months after
extraction and
ridge preservation compared to that after 6 months, Using tricalcium phosphate as a bone
substitute.
Methods: Minimally traumatic extraction with socket preservation using tricalcium
phosphate was done at 30 single-rooted tooth sites in 28 patients. 15 sites healed for an
average of 18 weeks (early healing group), and 17 sites were allowed to heal for an
average of 27 weeks (delayed healing group) before collecting the bone samples .
histological analysis was held to detect the percentage of new bone formation, residual
substitute particles, and connective tissue/non-mineralized structures for each site.
Results: All samples revealed a new bone formation, most of the residual substitute
particles were surrounded by woven bone. No statistically significant differences in the
amount of newly formed bone or residual substitute particles were found between the two
groups. Overall, the early healing group demonstrated a mean of34.8% newbone,
20.5%residual substitute material, and 44.7% non-mineralized tissue. The delayed healing
group showed mean values of 36%, 18.5%, and 45.5%, respectively.
Conclusion: This study suppose that waiting for 6 months after tooth extraction and
socket preservation using tricalcium phosphate does not provide a greater amount of new
bone formation or less residual bone particles compared to that after 4 months.
This study aims to assess the effectiveness of using calcium phosphate bone
cement in increasing the primary stability of orthodontic miniscrews by testing
its resistance to pullout forces.
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