Extra-Alveolar Temporary Anchorage Devices and Considerations of Adjacent Anatomical Structures-A Review
Sweta Saravanan1 and Steve Jacob2*
1Consultant Orthodontist in private practice, Gurgaon, Haryana
2PG student, Manav Rachna dental college, Faridabad
*Corresponding Author: Sweta Saravanan, Consultant Orthodontist in private practice, Gurgaon, Haryana.
Received: January 13, 2022; Published: February 11, 2022
Extra-alveolar TADs offer the orthodontist elaborate tooth movements like en-masse distalization, expansion, mesialization etc. with an added advantage of preventing root damage. Although these TADs are placed away from roots, they are in close proximity to the adjacent anatomical structures at the area of placement. The most commonly used extra-alveolar TADs are the infra-zygomatic crest screws, the buccal shelf screws, palatal, retromolar and symphseal screws. For the IZC screws, the main anatomical structure to be considered is the maxillary sinus where up to 2mm of penetration is acceptable and more than 2mm can cause its significant damage. Similarly, for the buccal shelf screws, the inferior alveolar nerve is to be considered to avoid damage because the buccal shelf area shows ethnic variation in terms of thickness ad width. Similarly, the retromolar, symphseal and palatal screws also have their adjacent anatomical structures to be kept in mind before their placement and use. This review aims to elaborate ideal sites of placement of extra-alveolar TADs and anatomical considerations of the adjacent anatomical structures to be kept in mind while placing them to prevent the injury and failure of the implants
Keywords: Extra-Alveolar; Anchorage; Anchorage; TADs; Maxillary Sinus
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