When the provisional returns to place after re-trimming, it does not presses on the non-keratized gingiva (Fig.18; >: junction between the keratinized and nonkeratinized gingivae). We hope that the nonkeratinized gingiva may become more mature quick in this way.

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Xin Wei, DDS, PhD, MS 1st edition 10/27/2014, last revision 03/15/2020