Becker W, Becker B E, Israelson H, Lucchini J P, Handelsman M, Ammons W, Rosenberg E, Rose L, Tucker L M, Lekholm U
Department of Periodontology, University of Southern California, School of Dentistry, Los Angeles, USA.
Int J Oral Maxillofac Implants. 1997 Jul-Aug;12(4):454-62.
This prospective longitudinal multicenter study evaluated the clinical outcomes after placement and restoration of one-step Brånemark implants into the maxillae and mandibles of completely and partially edentulous patients. Six surgical treatment centers participated in this study, in which 135 implants were placed into 63 adult patients. All implants were stable after placement. The majority of implants were placed into type B bone with minimal jaw resorption and type 2 bone quality. After implant placement, standard transmucosal healing abutments were firmly placed. The average amount of time between implant placement and prosthetic abutment connection was 170 days in the maxillae and 147 days in the mandibles. To evaluate crestal bone changes caused by implant placement, a periodontal probe was used to measure midbuccally from the top of the implant cylinder to the alveolar crest; in 29 patients, 54 midbuccal bone crest sites were remeasured following prosthetic abutment connection. Crestal bone changes in mandibles and maxillae were statistically and clinically insignificant. Six implants were lost prior to loading and one implant has not been restored. No implants or restorations were lost after loading. At 1 year, the implant success rate was 95.6%. Mesiodistal radiographic measurements from 34 patients were averaged, and changes from prosthetic abutment connection to, on average, 12 months follow-up were compared. The radiographs, which were digitalized, measured from the bottom of the implant cylinder to the most coronal bone in contact with implant thread. For mandibular implants, the mean radiographic bone level at prosthetic abutment connection was 1.07 mm; after loading, it was 1.35 mm. For maxillary implants, the mean radiographic bone height at prosthetic abutment connection was 1.16 mm; after loading, it was 1.36 mm. These changes were not statistically significant. The 1-year outcomes from this patient series indicate that one-step Brånemark implants provide excellent clinical results when placed in patients with good bone quality and quantity.
这项前瞻性纵向多中心研究评估了将单步式布兰emark种植体植入全口和部分无牙患者的上颌骨和下颌骨并进行修复后的临床结果。六个外科治疗中心参与了这项研究，共将135枚种植体植入63名成年患者体内。所有种植体植入后均保持稳定。大多数种植体植入到B型骨（颌骨吸收最小）和2级骨质中。种植体植入后，牢固地放置了标准的穿龈愈合基台。上颌骨种植体植入与修复基台连接之间的平均时间为170天，下颌骨为147天。为了评估种植体植入引起的牙槽嵴骨变化，使用牙周探针从种植体圆柱体顶部向颊侧中部测量至牙槽嵴；在29名患者中，54个颊侧中部牙槽嵴部位在修复基台连接后重新进行了测量。下颌骨和上颌骨的牙槽嵴骨变化在统计学和临床上均无显著意义。有6枚种植体在加载前丢失，1枚种植体尚未修复。加载后没有种植体或修复体丢失。1年后，种植体成功率为95.6%。对34名患者的近远中影像学测量结果进行平均，并比较从修复基台连接到平均12个月随访时的变化。数字化的X线片从种植体圆柱体底部测量至与种植体螺纹接触的最冠方骨。对于下颌种植体，修复基台连接时的平均影像学骨水平为1.07mm；加载后为1.35mm。对于上颌种植体，修复基台连接时的平均影像学骨高度为1.16mm；加载后为1.36mm。这些变化无统计学意义。该患者系列的1年结果表明，单步式布兰emark种植体植入骨质量和骨量良好的患者时可提供优异的临床效果。
