Grassi Sauro, Piattelli Adriano, Ferrari Daniel S, Figueiredo Luciene C, Feres Magda, Iezzi Giovanna, Shibli Jamil Awad
Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos, SP-Brazil.
J Oral Implantol. 2007;33(1):8-12. doi: 10.1563/0-791.1.
The aim of this preliminary study was to evaluate the influence of a sandblasted acid-etched surface on bone-implant contact percentage (BIC%) as well as the bone density in the threads area (BD%) in type 4 bone after 2 months of unloaded healing. Five subjects (mean age = 42.6 years) received 2 microimplants each during conventional implant surgery in the posterior maxilla. The microimplants with commercially pure titanium surface (machined) and sandblasted acid-etched surface served as the control and test surfaces, respectively. After a healing period of 2 months, the microimplants and the surrounding tissue were removed and prepared for ground sectioning and histomorphometric analysis. One microimplant with a machined surface was found to be clinically unstable at the time of retrieval. Histometric evaluation indicated mean BIC% was 20.66+/-14.54% and 40.08+/- 9.89% for machined and sandblasted acid-etched surfaces, respectively (P=.03). The BD% was 26.33 +/-19.92% for machined surface and 54.84+/-22.77% for sandblasted acid-etched surface (P=.015). Within the limits of this study, the data suggest that the sandblasted acid-etched implant surface presented a higher percentage of bone-implant contact compared with machined surfaces, under unloaded conditions in posterior maxilla after a healing period of 2 months.
本初步研究的目的是评估喷砂酸蚀表面对4型骨在2个月无负载愈合后骨-种植体接触百分比（BIC%）以及螺纹区域骨密度（BD%）的影响。五名受试者（平均年龄 = 42.6岁）在常规上颌后牙种植手术中每人植入2枚微型种植体。分别以具有商业纯钛表面（机加工）和喷砂酸蚀表面的微型种植体作为对照和测试表面。在2个月的愈合期后，取出微型种植体及其周围组织，准备进行磨片切片和组织形态计量分析。在取出时发现一枚具有机加工表面的微型种植体在临床上不稳定。组织计量学评估表明，机加工表面和喷砂酸蚀表面的平均BIC%分别为20.66±14.54%和40.08±9.89%（P = 0.03）。机加工表面的BD%为26.33±19.92%，喷砂酸蚀表面的BD%为54.84±22.77%（P = 0.015）。在本研究的范围内，数据表明，在2个月愈合期后，在上颌后牙无负载条件下，喷砂酸蚀种植体表面与机加工表面相比呈现出更高的骨-种植体接触百分比。
