Abstract
Aim: To evaluate the effect of the implant’s thread cross sectional design on the micromotion of the implants in different bone qualities. Materials and methods: In this finite element analysis study, four implant models exhibiting four different thread designs were created using Solidworks software. Each model was assembled in four different bone quality models resulting in 16 groups. Each group was examined for micromotion under 100N force using ANSYS software. Results: D1 bone showed the lowest micromotion while D4 bone showed the highest, regardless the thread design. In D1 and D2 bone, v-shaped thread showed the lowest micromotion, which was lower than the square thread and the buttress was lower than the reverse buttress. While in D3 and D4 bone, the lowest micromotion was observed with the square thread, which was lower than the v-shaped and the reverse buttress thread was lower than the buttress thread. Conclusion: Micromotion decreases as the bone quality increases irrelevant of the implant thread design. In D1 and D2 bone, the best thread to be used is the v-shaped thread, while in D3 and D4 bone, the best is the square shaped thread.
Highlights
Various factors contribute to the success or failure of implants and should be considered for proper and suitable treatment plan
The results were obtained for maximum micromotion and maximum principal stresses were recorded (Table 3) and were blotted in flowcharts shown in figure 3
Micromotion In D1 bone, the results of this study revealed that model 1(c) reflects the lowest micromotion and model 1(b) reflects the
Summary
Various factors contribute to the success or failure of implants and should be considered for proper and suitable treatment plan. These factors include implant related factors as implant design and patient related. Misch has classified the bone quality according to density into D1, D2, D3 and D4 This classification differentiated between them according to the ratio between cortical and cancellous bone and the size of the trabecular spaces of the cancellous bone, which influences the bone-to-implant contact (BIC) and affects the initial stability and micromotion of the implants. As it is increasing implant surface area raising bone-to-implant contact (BIC), dissipating stresses, increasing initial stability, which enhances the implant osseointegration and success (Manikyamba and Mc, 2017). One of the problems encountered during implant surgeries was insufficient initial stability, which could be enhanced by various factors including special surgical techniques, implant designs and surface treatments. (Alghamdi, 2018) (Alghamdi, 2018)
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