Kajiwara Norihiro, Masaki Chihiro, Mukaibo Taro, Kondo Yusuke, Nakamoto Tetsuji, Hosokawa Ryuji
*Graduate Student, Department of Oral Reconstruction and Rehabilitation, Graduate School, Kyushu Dental University, Fukuoka, Japan. †Assistant Professor, Department of Oral Reconstruction and Rehabilitation, Kyushu Dental University, Fukuoka, Japan. ‡Assistant Professor, Department of Oral Reconstruction and Rehabilitation, Kyushu Dental University, Fukuoka, Japan. §Assistant Professor, Department of Oral Reconstruction and Rehabilitation, Kyushu Dental University, Fukuoka, Japan. ‖Associate Professor, Department of Oral Reconstruction and Rehabilitation, Kyushu Dental University, Fukuoka, Japan. ¶Professor, Department of Oral Reconstruction and Rehabilitation, Kyushu Dental University, Fukuoka, Japan.
Implant Dent. 2015 Feb;24(1):37-41. doi: 10.1097/ID.0000000000000167.
Zirconia is often used for implant abutments for esthetics. The aim of this clinical study was to compare the effects of zirconia and metal abutments on periimplant soft tissue.
Ten maxillary anterior implant patients, 5 with metal abutments and 5 with zirconia abutments, were enrolled in this trial. The soft tissue around the implant abutments was evaluated by 2-dimensional laser speckle imaging and thermography. The blood flow in soft tissue around natural teeth was also measured to correct for differences among the subjects.
Significantly greater blood flow was detected in the zirconia abutment group (95.64 ± 5.17%) relative to the metal abutment group (82.25 ± 8.92%) in free gingiva (P = 0.0317). Reduced blood flow (by almost 18%) was detected in the tissue surrounding metal abutments compared with the tissue surrounding natural teeth. The surface temperature showed no significant difference for all measurements.
These results suggest that blood flow in tissue surrounding zirconia abutments is similar to that in soft tissue around natural teeth. Moreover, zirconia abutments could be advantageous for the maintenance of immune function by improving blood circulation.
氧化锆常用于种植体基台以实现美观效果。本临床研究的目的是比较氧化锆基台和金属基台对种植体周围软组织的影响。
本试验纳入了10例上颌前牙种植患者，其中5例使用金属基台，5例使用氧化锆基台。通过二维激光散斑成像和热成像评估种植体基台周围的软组织。还测量了天然牙周围软组织的血流，以校正受试者之间的差异。
在游离龈中，氧化锆基台组（95.64±5.17%）相对于金属基台组（82.25±8.92%）检测到显著更高的血流（P = 0.0317）。与天然牙周围组织相比，金属基台周围组织的血流减少（近18%）。所有测量的表面温度均无显著差异。
这些结果表明，氧化锆基台周围组织的血流与天然牙周围软组织的血流相似。此外，氧化锆基台可能通过改善血液循环对维持免疫功能有利。
