Contral group only given convention treatment.

对照组只给予常规治疗。

Results The changes of bone trabecula, inferior margin and canal of mandible were present in osteoporosis, but the height of alveolar bone remained the same as the contral.

结果骨质疏松症与牙槽骨骨小梁、下颌管管壁和下颌骨下缘骨皮质吸收之间明显相关，与牙槽骨高度无相关性。

PKRP appears to have the advantage of more safety and easier blood contral, less physical damage and complication, being an superior efficient TUR operation for BPH in high risk patient.

但PKRP具有止血效果好、安全性高、对机体生理功能影响小，并发症少等优点，对高危BPH患者是一极具优势的TUR手术方法。