由于欧洲足联要求温布利在欧冠决赛举行前两周就必须做好准备，足协不得不将今年的足总杯决赛提前。
The FA has had to bring this year’s final forward because of Uefa’s requirement that Wembley be available to it two weeks before the Champions League final.
结论：套筒冠固位体较冠外精密附着体对基牙牙周影响较小，更有利于基牙牙周组织的健康。
Conclusion: the telescope crown retainer has little influence than the precision attachment retainer to the periodontium of the abutment.
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