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Estimating the Stability of Orthodontic Micro-implant after Applying Orthodontic Force "An Experimental in Vivo Study"

Author: Estimating the Stability of Orthodontic Micro-implant after Applying Orthodontic Force "An Experimental in Vivo Study"
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 21 Pages: 154-161
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To evaluate weather micro-screw implants remain stationary or move against orthodontic forces during different healing periods (immediate loading, loading after 2 weeks and 4 weeks). Materials and Methods: Thirty micro-screw implants were implanted in 6 rabbits. These rabbits divided into 3 groups (2 in each group). The first group received loading immediaty after implantation. The second and third groups received loading after 2 weeks and 4 weeks of healing period respectively. The stabil-ity of these implants was measured using periotest device before and after loading. The data was ana-lyzed using descriptive statistic, Analysis of variance (ANOVA), Duncan Multiple analysis range test and student t-test. Result: Among the three groups, the first group having a significant greater stability of micro-screw implants immediately before and after loading and after 2 weeks of loading period. Conclusion: micro-screw implants can be loaded immediately after implantation with light orthodontic force; also these implants can be loaded after 4 weeks of healing period.


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.

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