Survival Analysis of Extra-Alveolar TADs Used for Orthodontic Anchorage

The objective of this study was to determine the survival rate of extra-alveolar implants after three months of placement. Also, a questionnaire on the subject's response to the implants were distributed. The records of patients who had extra-alveolar implants placed in the department of orthodontics were collected. A total of 32 samples were selected for this study - 7 Buccal Shelf (BS) implants and 25 Infra-Zygomatic Crest (IZC) implants. Stability of the TADs were checked using probe and tweezer on the third review. A questionnaire consisting of five questions were distributed to the subjects. Descriptive Statistics was calculated in terms of frequencies and percentages using SPSS software 23.00. Chi-square association test was also performed to associate the extra-alveolar TADs and the discomforts experienced after its placement. The results of this study showed that out of 32 implants only two reported with failure. From a patient point of view, restricted mouth opening, mild swelling was noted during the initial few days of placement. In this study, a high success rate of 93.75% was recorded for extra-alveolar TADs. Patient discomfort was observed initially after the placement of the TADs which subsided over a period of 2 weeks.