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| Study on the Primary Stability of Implants post Immediate Implantation |
| You Jia, Zhou Lefeng, Peng Wei*, Gao Yilin, Yao Chunyan |
| (Key Laboratory of E&M (Zhejiang University of Technology), Ministry of Education & Zhejiang Province,Hangzhou 310014,China) |
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Abstract A good primary stability post immediate implantation was the key factor to achieve success of implantation. The bone defect due to periodontitis, trauma or tooth extraction, the magnitude of interference between the implant and tooth socket could affect the primary stability of implants. This article established a new classification model for the degree of bone wall defect, and with the help of finite element software ABAQUS. The classification could acquire the root-analogue implant’s primary stability with different interference and defective degree of bone wall. Next, inserting implant in analog bone to comparative analysis. Results showed that primary stability became higher with the increase of magnitude of interference, and with the increase of bone defect degree, primary stability declined. In the three walls of bone defect, when there was no interference between the implant and tooth socket, the implant stability quotient(ISQ) was less than 40; and when the magnitude of interference was 0.2mm, the ISQ values were all over 50. It was shown that the interference made a great effect on the primary stability. The ISQ values were almost below 40 when the bone around implant was one wall of bone defect, and we should increase the magnitude of interference to increase primary stability. According to the different degree of bone defect, the required magnitude of interference was different. The established classification could provide theoretical basis for custom-made root-analogue implant in the future.
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Received: 17 September 2015
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