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After ion-exchange at 350°C and 380°C, especially after the processing at 350°C for 128h, the wear rates of both running-in and steady wear stages could be significantly decreased. More importantly, the standard deviation of wear rate in the running-in wear stage could be remarkably reduced after the treatment. The improved reliability of wear performance was attributed to the strengthening and toughening effects of the ion-exchange processing. For the fluorapatite veneering porcelain, the ion-exchange protocol to obtain an ion-exchange

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