RETENTION OF MINI SCREWS IN ORTHODONTICS – A COMPARATIVE IN VITRO STUDY ON THE VARIABLES

Objectives: To correlate between the different lengths, angles of insertion and mini-implant material find out most retentive combination.
 Materials methods: 48 mini-implants (24 Titanium 24 stainless steel) lengths 6mm, 8mm 1.5 mm diameter were inserted into humerus bone goat at two angulations, 600 900. insert in respective custom made template was confirmed with digital radiographs. Force applied on to a universal testing machine compressive load failure measured.
 Results: Results revealed that stability implant positively correlating length implant. A perpendicular angulation produced more stability. Moreover, titanium had resistance than steel mini-implants.
 Conclusion: Length mini-implant, its factors affecting In this study, angulated 900 stable their counterparts.