[Advances in the application of the bony window technique in endodontic microsurgery].

The bony window technique refers to cutting the intact bone plate to form a bone window and a free bone block to get access to lesions under the bone. At the end of the surgery, the dislocated bony lid needs to be repositioned to its original position. In endodontic microsurgery, compared with conventional osteotomy, the bony window technique has the advantages of improving the view of surgery and operability, reducing postoperative bone defects, promoting bone healing, and maintaining the integrity of the jaw outline. Accurate positioning and preparation of the bony window are important prerequisites for subsequent operations during the surgery, but it's difficult in some situations, such as when the operative area is located posteriorly or the bone cortex on the lesion surface is thick and intact. What's more, whether the free bone block can be stabilized in situ after repositioning is closely related to the prognosis of the surgery. The complementary application of digital navigation technology and bone cavity filling materials may help to improve the bony window technique and provide more possibilities for the retention of affected teeth in difficult cases. 骨窗技术是指在病变表面完整的骨板上进行切割以形成骨窗和游离骨块，从而获得手术入路，并在手术最后阶段将脱位的骨块重新放置到原位的手术方法。在显微根尖手术中应用此技术有改善手术视野和可操作性、减少术后骨缺损、促进病变区域骨愈合、维持颌骨轮廓完整性等优势。在手术过程中，准确定位和制备骨窗是进行后续操作的重要前提，但在术区位置靠后或病变表面骨皮质厚而完整等情况下完成此步骤较困难，同时游离骨块复位后能否稳定在原位也与手术预后密切相关，数字化导航技术和骨腔填塞材料的辅助应用可能有助于改进骨窗技术，为疑难病例患牙的保留提供更多可能。.