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

Khudair Al-Jumaili,Mohammad Suleiman,Saba Al-Zubaidi

doi:10.33899/rden.2012.84761

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.

Highlights

Anchorage in orthodontics has been defined as the nature and degree of resistance to displacement offered by an anatomic unit when used for the purpose of performing tooth movement.[1]
This study addresses the following points: Is mechanical retention sufficient for the orthodontic anchorage or do osseo integration helps? Is immediate loading preferable or it is better to delay loading to allow for healing time after implantation?
Immediate loading of MSIs is becoming more common, with several reports in the literature to support the practice.[12, 13] The result in this study showed that the immediate loading MSIs possessed the greater stability when compare with the other groups there is a decreased in the stability of second group of MSIs and the stability was gradually recovered as time passed in the third group of MSIs

Summary

INTRODUCTION

Anchorage in orthodontics has been defined as the nature and degree of resistance to displacement offered by an anatomic unit when used for the purpose of performing tooth movement.[1]. The retention of mini-implant is an important factor for improving the success rate of orthodontic treatment, retention depends on many factors such as implant type and dimension,(4) implant surface characteristic,(5) insertion torque,(6) force magnitude,(7) location,(8) bone quality.[9]. Another important parameter which plays role in mini-implant retention to bone is primary stability is called the mini- implant stability immediately after insertion www.rafidaindentj.net. This study addresses the following points: Is mechanical retention sufficient for the orthodontic anchorage or do osseo integration helps? This study addresses the following points: Is mechanical retention sufficient for the orthodontic anchorage or do osseo integration helps? Is immediate loading preferable or it is better to delay loading to allow for healing time after implantation?

MATERIALS AND METHODS

RESULTS

DISCUSSION

CONCLUSIONS