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Article
Histological and histomorphometric analysis of strontium chloride coated commercially pure titanium implant compare with hydroxyapatite coating

Authors: Ghasak H. Jani --- Shatha S. Al-Ameer --- Salam N. Jawad
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2015 Volume: 27 Issue: 1 Pages: 26-31
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: In recent years, the immediate loading of dental implants has become more accepted as a standardprotocol for the treatment of the edentulous area. Success in implant dentistry depends on several parameters thatmay improve phenomenon of osseointegration and new bone formation in close contact with the implant. The aimof study was to evaluate the effect of strontium chloride coating of screw shape commercially pure titanium dentalimplant osseointegration at bone - implant interface by histomorphometric analysis and compare withhydroxyapatite coating at 2 time periods (2 weeks and 6 weeks).Materials and methods: Electrophoretic Deposition Technique (EPD) was used to obtain a uniform coating layer oncommercially pure titanium screws. The tibia of 4 white New Zealand rabbits was chosen as implantation sites. Eachtibia of rabbit received two screws, one strontium chloride coated and one hydroxyapatite coated and a total 30histological sections were obtained for each coating material in each period of time. Histomorphometric analysiswas performed to measure new bone formed ratio between implant and original bone, after 2 and 6 weeks healingperiods.Results: There was increased in new bone formation ratio for the strontium chloride coated implants thanhydroxyapatite coated implants and over the two periods of time. There was an increase in the new bone formationratio at bone-implant interface with time.Conclusion: Coating commercially pure titanium implant with strontium chloride was more efficient in increasingosseointegration at bone implant interface than hydroxyapatite , which was demonstrated by higher new boneformation and maturation at the two periods of time 2 weeks and 6 weeks after implantation


Article
Assessment of Calcium Carbonate Coating on Osseointegration of Commercially Pure Titanium Implant by Torque Removal Test and Histomorphometric Analysis

Authors: Mustafa S. Mahmood --- Shatha S. Al-Ameer
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2017 Volume: 29 Issue: 1 Pages: 32-38
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: One of the most important methods to replace lost teeth is dental implants. In order to increase the strength of connection of the implant with the jaw bone to provide early loading after placement, implant is coated by different coating materials that achieved that purpose. The aim of this study was to evaluate the influence of coating CP Ti implant with calcium carbonate on the strength of bone-implant interface after two and six weeks of implantation in rabbit femur bone by torque removal test, histological and histomorphometric analysis.Materials and methods: Coating the surface of commercially pure titanium screws with extra pure synthetic calcium carbonate via electrophoretic deposition method (EPD) was done. The surface of disc samples after coating was checked by optical microscopy, X-ray diffraction examination and measurement of coating thickness. Ten male white French rabbits were prepared for implantation. Forty screws were implanted in the femur bone, two implant screws in each femur bone. The first screw is coated with calcium carbonate and compared with the second uncoated screw. Rabbits are divided into two groups according to the healing periods 2 and 6 weeks. By torque removal, the osseointegration is measured. Single screw from each group was used for histological and Histomorphometric analysis.Results: There was significant increased mean torque removal for screws coated with calcium carbonate compared with uncoated screws. Histological examination showed an increase in the growth of bone cells for coated screws, and the histomorphometric analysis showed an increase in new bone formation percent (NBFP).Conclusion: Coating the surface of the CP Ti implant with calcium carbonate via electrophoretic deposition method had great effect in increasing the osseointegration than uncoated surface.


Article
Evaluation the effect of laparoscopic unilateral ovariectomy in young Iraqi black goat on the histomorphometric of the remaining ovary at adult stage
تقييم تأثير استئصال المبيض منظارياً من جانب واحد في الماعز العراقي الأسود اليافع على القياس النسجي للمبيض الآخر الباقي عند مرحلة البلوغ

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Abstract

The ovarian histomorphometric in adult normal and unilateral ovariectomized Iraqi black goats (Age 7 months) was studied to evaluate the effect of laparoscopic unilateral ovariectomy of young goat (age 2-3 months) on other remaining ovary histologically. Ten young female Iraqi black goats were used in the study. The goats were divided randomly into two equal groups; young goats were left normal (group A) and young goats underwent to right laparoscopic unilateral ovariectomy (group B). All animals in both groups were left to reach adult stage at 7 months age, in which they underwent to removal their ovaries laparoscopically by using the harmonic scalpel. Operations were performed under general anesthesia by using of a mixture of xylazine and ketamine intramuscularly. The ovarian histomorphometric included; height of germinal epithelium and thickness of tunica albuginea, cortex and medulla were measured at adult stage for both groups. The study revealed a significant elevation (P<0.05) in thickness value of tunica albuginea, cortex and medulla in the right ovary compared with the left one in normal adult goat (group A). The left ovary in group (B) showed significant increase in the thickness value of tunica albuginea, cortex and medulla compared with those in similar (left) ovary in group (A) which indicated that the remaining ovary in group (B) showed compensatory action in increasing their histological structures measurements. The short operative time, no intraoperative and less postoperative complications referred to that the laparoscopic ovariectomy in goats could be performed successfully with this technique and by using of harmonic scalpel

دُرست القياسات النسجية للمبايض في الماعز العراقي الاسود البالغ الطبيعي والمستأصل المبيض منظاريا من جانب واحد (في عمر 7 اشهر) لتقييم تأثير استئصال أحد المبيضين في الماعز اليافع (عمر 2-3 اشهر) على القياس النسجي للمبيض الآخر الباقي عند مرحلة البلوغ. استعملت في الدراسة 10 من أناث الماعز اليافعة، والتي قسمت عشوائيا على مجموعتين متساويتين، تركت الحيوانات اليافعة في المجموعة الأولى طبيعية، أما المجموعة الثانية فأجريت لها عملية استئصال المبيض الأيمن منظاريا. تركت جميع الحيوانات في كلتا المجموعتين للوصول إلى مرحلة البلوغ في عمر 7 اشهر، وبعدها خضعت لعملية استئصال المبايض منظاريا باستعمال المشرط التوافقي. أجريت جميع العمليات الجراحية تحت التخدير العام باستعمال خليط من الزايلازين والكيتامين حقنا بالعضل. تم اجراء القياسات النسجية للمبايض لجميع الحيوانات في مرحلة البلوغ وللمجموعتين والتي تضمنت قياس ارتفاع الظهارة الجرثومية، وسمك الغلالة البيضاء، والقشرة والنخاع. أظهرت نتائج الدراسة وجود ارتفاع معنوي في سمك الغلالة البيضاء والقشرة والنخاع في المبيض الأيمن مقارنة مع المبيض الايسر في الماعز البالغ الطبيعي في المجموعة A. أظهر المبيض الأيسر في المجموعة B زيادة معنوية في سمك الغلالة البيضاء والقشرة والنخاع مقارنة مع تلك الموجودة في المبيض الأيسر المماثل في المجموعة A، والتي أعطت مؤشراً على أن المبيض الأيسر المتبقي في المجموعة B قد أظهر عملاً تعويضيا في زيادة قياسات التراكيب النسجية للمبيض. اشار قلة وقت العملية الجراحية، وعدم وجود مضاعفات اثناء العملية وقلة المضاعفات بعد العملية الجراحية إلى أنّ عملية استئصال المبايض في الماعز جيدة باستعمال المنظار والمشرط التوافقي.

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