<p>患者，男性，45岁。<img title="" alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/e3/0e/e30e4e0510af72d8fb9109afb3bb50c0.png" style="width: 100%;height: auto;">缺失，<img title="" alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/f7/6f/f76f8ab3ca070d01717e3419c397d02c.png" style="width: 100%;height: auto;">间隙小，<img title="" alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/db/e5/dbe5e6ab64b4e89454c293efda0712b2.png" style="width: 100%;height: auto;">伸长，行可摘局部义齿修复1年后该义齿后牙基托处折裂，前牙区亦有裂纹。究其原因，下面说法不正确的是（　）。</p>