Maillet W A, Torneck C D, Friedman S
Department of Endodontics, Dalhousie University, Halifax, NS, Canada.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1996 Dec;82(6):681-90. doi: 10.1016/s1079-2104(96)80444-6.
The Nd:YAG laser beam may be used for root resection, but the tissue compatibility of the resulting root surface has not been confirmed.
This study assessed the connective tissue response over time to implanted root segments with Nd:YAG laser-cut or bur-cut surfaces.
Endodontically treated roots of 25 extracted human teeth were cross sectioned to form 3.5 mm thick disks by alternating a water-cooled Nd:YAG laser with a high-speed water-cooled tungsten fissure bur. A total of 63 disks were implanted into the dorsal subcutaneous tissue of 16 rats, then recovered with the surrounding tissue after periods of 3, 7, 14, 28, 60, and 90 days, and processed for light microscopic examination. Tissue against the cut surfaces was assessed for intensity and extent of inflammation and fibrous capsule thickness.
A two-factor analysis of variation showed statistically significant (p < 0.05) differences between the laser-cut and bur-cut surfaces.
Tissue repair about the root surfaces resected with Nd:YAG laser was delayed when compared with those resected with a bur.
钕钇铝石榴石（Nd:YAG）激光束可用于牙根切除术，但由此产生的牙根表面的组织相容性尚未得到证实。
本研究评估了随着时间推移，Nd:YAG激光切割或车针切割表面的植入牙根段的结缔组织反应。
将25颗拔除的人牙进行根管治疗后，通过交替使用水冷Nd:YAG激光和高速水冷钨钢裂钻，将牙根横切成3.5毫米厚的牙片。总共63片牙片被植入16只大鼠的背部皮下组织，然后在3、7、14、28、60和90天后与周围组织一起取出，并进行光镜检查。评估切割表面周围组织的炎症强度和范围以及纤维囊厚度。
双因素方差分析显示，激光切割表面和车针切割表面之间存在统计学上的显著差异（p < 0.05）。
与车针切除的牙根表面相比，Nd:YAG激光切除的牙根表面的组织修复延迟。
