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. 2021 Jul 28;10(15):3321. doi: 10.3390/jcm10153321

Figure 1.

Figure 1

Cross section of both groups. (a) MLF (micro-locking one-piece fixture), (b) MLA (micro-locking abutment), (i) body, (ii) ball, (iii) spring, (iv) cap, and (v) retention groove.