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Article
Stability Evaluation of Micro-Screw Im-plant in Cases Given a Bone Inducing Substances "An Experimental in Vivo Study

Author: Mustafa M Al-Sultan
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 21 Pages: 136-146
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The present study aimed to investigate the desirable loading time of micro-screw implant by stability evaluation and detecting the possibility of using alendronate sodium to increase the stability. Materials and methods: Forty eight micro-screw implant, twelve adult rabbits and fourteen alendro-nate sodium ampoules were used in this study, the rabbits were divided into two main groups, treated and control group, which further subdivided into three subgroups. Eight micro-screw implant instilled in tibiaes of each subgroup just six of them used for test the remaining cancelled, the stability test down using the periotest. These subgroups were nominated according to the loading times which are immedi-ate loading, loading after two weeks and loading after four weeks with stability measured after instilla-tion, before and after loading and two weeks after loading. Results: No significant differences between subgroups before loading and after two weeks of loading but significant after loading. For immediately loaded treated subgroup no significant differences between immediate loading and two weeks after loading. For two and four weeks treated subgroup a significant difference in stability between immedi-ate instillation and after loading. Conclusions: Micro-screw implant even smaller diameter could be used as a fixed anchorage in orthodontics and possibly could be loaded safely from time of immediate instillation, further the use of alendronate sodium add no benefit to increase stability according to the criteria used in this study.


Article
Histological Evaluation of Tissues Using a Bone Inducing Substance in Cases of Micro-Screw Implant "An Experimental In Vivo Study"

Authors: Tahani A Alsandook --- Mustafa M Al-Sultan --- Sabah A Ismail
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2014 Volume: 14 Issue: 24 Pages: 1-8
Publisher: Mosul University جامعة الموصل

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Abstract

To evaluate the effects of systemically administered Alendronate sodium on osteoclastic activity and osteoblast accumulation. Materials and Methods: Fourty eight micro-screw implant, twelve adult rabbits were used in this study, the rabbits divided into two main groups, treated and control group, which further subdivided into three subgroups according to the healing periods after 2 weeks, 4 weeks and 6 weeks. All animal were treated with alendronate sodium. Eight micro-screw implants instilled in tibiaes of each tested subgroup and six instilled in tibiaes of control subgroups, the tissue facing the micro-screw implant subjected to histological evaluation for the tested subgroups and control sub-groups including the number of active osteoblast and osteoclast. Results: A significant differences be-tween subgroups 0WT, 2WT and 4WT, were more prominent for 2WT and 4WT subgroups from 0WT subgroups which showed score (+++), further no significant difference for control subgroups were all showed score (+++) for osteoblastic activity. For the active osteoclast a significant differences detected between subgroups of experimental and control sample, were score (+) noticed in the 0WT subgroups, score (+) in 2 readings and (++) in 6 readings of4WT subgroups and score (+++) for 4WT subgroups with no significant difference between experimental and control samples in 2 weeks, 4 weeks and 6 weeks healing periods .Conclusions: According to the result of histological evaluation, no estimated differences in the bone remodeling process had been detected between treated and the control group, which may need longer period of drug administration to probably induce effect on bone.


Article
A Comparative Assessment of Space Closure Utilizing by Lingual and Conventional Brackets

Authors: Omar H. Alluazy --- Hakam H. Sabah --- Saba H. Al–Zubaidi --- Mustafa M. Al-Sultan
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2014 Volume: 14 Issue: 25 Pages: 220-227
Publisher: Mosul University جامعة الموصل

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Abstract

AIMS:To assess the effect of system type on the amount of space closure when equal force use on each system and to compare the amount of rotation and tipping generated by lingual and conventional brackets. Materials and Methods: A mandibular typodont system with Class I wax form and set of metal teeth were used in this study. After removing the second premolar bilaterally, each tooth of the anterior teeth and canines were bonded with two bracket systems , preadjusted Roth stainless steel 0.022x0.030 inch conventional (labial) brackets (CoBS group) and lingual brackets (LiBS group) except right first premolar were bonded with lingual bracket (LIBS group) and left first premolar were bonded with labial bracket (CoBS group). Bite plane extension bar (BPB) and canine extension bar (CB) were constructed bilaterally for the measurement of first premolars tipping and rotation. A 200gm. of force applied by close coil spring to retract the first premolars bilaterally . After immersion of the typodont in water bath with 50-550 C for 5 minutes, the rate of space closure , tipping and rotation of first premolars were measured. Results: A statistical analysis (independent-samples t-test) used in this study, there was a significant difference between the two system groups (CoBS group and LiBS group). The LiBS group had a significant higher amount of tooth movement, and higher degree of rotation. For the tipping, the CoBS group had the higher level of tipping with a non-significant difference with LiBS group. Conclusions: The outcomes of this study showed that the higher rate of space closure and rotation were associated with LiBS group, while there is a nonsignificant difference in the amount of tipping between the two groups. So, Lingual appliance was appeared to be very effective method for tooth sliding during fixed orthodontic treatment.

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