【单选题】【消耗次数：1】
关于复合树脂，下列说法叙述错误的为（）
①
小颗粒型复合树脂有光洁的表面和良好的色泽稳定性，广泛用于前牙（超微者用于前牙，混合型用于后牙）
②
体积收缩导致复合树脂与牙体之间形成边缘裂缝是复合树脂的一大缺陷
③
填料含量多、粒度大的比填料含量少、粒度小的复合树B旨的机械强度高
④
复合树脂的线胀系数大于天然牙
⑤
在树脂基质相同的情况下，填料越多，复合树脂的线胀系数越小
参考答案：
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自凝树脂残余单体量较热凝树脂高
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