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INVITED SUBMISSION
Year : 2018  |  Volume : 52  |  Issue : 6  |  Page : 127-141

Infra-zygomatic crest and buccal shelf - Orthodontic bone screws: A leap ahead of micro-implants – Clinical perspectives


Consultant Orthodontist, Department of Orthodontics and Dento-Facial Orthopedics, Great Lakes Dental Clinic and Orthodontic Centre, Kolkata, West Bengal, India

Correspondence Address:
Dr. Abhisek Ghosh
Department of Orthodontics and Dento-Facial Orthopedics, Great Lakes Multispeciality Dental Clinic and Orthodontic Centre, 27, Janak Road (Behind Lake Mall), Kolkata - 700 029, West Bengal
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jios.jios_229_18

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Absolute anchorage systems have stormed the world of orthodontics over the past two decades with its ability to produce skeletal anchorage, converting borderline surgical cases into non-surgical and extraction cases into non-extraction or even bringing about the esthetic impact which was difficult to achieve by conventional mechanics. Among the skeletal anchorage systems, the most popular being – mini-implants or micro-screws which have an intra-radicular site of placement. Their greatest advantage being the ease and minimally invasive methods of placement and the commonest disadvantage being early loosening during the course of treatment. A more rigid alternative was then introduced called as the SAS -Skeletal Anchorage Systems (I-plate, Y-plate etc) with its extra-radicular site of placement, which did overcome the high failure rates of a regular mini-implant but then their placement required raising of flaps and extensive surgical intervention. More recently an apt balance was achieved with the advent of the -Orthodontic Bone Screws (OBS) which not only had an extra-radicular site of placement in the infra-zygomatic crest of the maxilla and the buccal shelf area of the mandible, with significantly less failure rates than regular mini-implants but also doesn't require extensive surgical intervention for their placement. This article is aimed at providing an overview - to the recently introduced OBS system, their technical, bio material and bio-mechanical differences with the commonly used mini-implant system, the case selection criteria, advantages, disadvantages and an in-depth to the cases treated with them.


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