Faculty of Dentistry, University of Medical Science, La Habana, Cuba.
Clin Oral Implants Res. 2012 May;23(5):536-41. doi: 10.1111/j.1600-0501.2012.02432.x. Epub 2012 Feb 9.
To evaluate the effect of implant length (6 mm vs.11 mm) on osseointegration (bone-to-implant contact) of implants installed into sockets immediately after tooth extraction.
In six Labrador dogs, the pulp tissue of the mesial roots of (3) P(3) was removed and the root canals were filled. Flaps were elevated bilaterally, the premolars hemi-sectioned and the distal roots removed. Recipient sites were prepared in the distal alveolus and a 6 mm or an 11 mm long implant was installed at the test and control sites, respectively. Non-submerged healing was allowed. After 4 months of healing, block sections of the implant sites were obtained for histological processing and peri-implant tissue assessment.
No statistically significant differences were found between test and control sites both for hard and soft tissue parameters. The bone-to-implant contact evaluated at the apical region of the implants was similar as well. Although not statistically significant, the location of the top of the bony crest at the buccal aspect was more apical in relation to the implant shoulder at the test compared with the control sites (2.0 ± 1.4 and 1.2 ± 1.1 mm, respectively).
Shorter implants (6 mm) present with equal osseointegration than do longer implants (11 mm).
评估种植体长度（6 毫米与 11 毫米）对即刻拔牙窝内植入物骨整合（骨-种植体接触）的影响。
在 6 只拉布拉多犬中，去除（3）P（3）近中根的牙髓组织，并填充根管。双侧掀起瓣，将前磨牙半切，去除远中根。在远中牙槽骨制备受体部位，在测试和对照部位分别植入 6 毫米或 11 毫米长的种植体。允许非埋入式愈合。愈合 4 个月后，获得种植体部位的块状切片进行组织学处理和种植体周围组织评估。
在硬组织和软组织参数方面，测试部位和对照部位之间均无统计学差异。根尖区种植体的骨-种植体接触也相似。尽管无统计学意义，但与对照部位相比，测试部位颊侧骨嵴顶的位置更偏向于种植体肩（分别为 2.0 ± 1.4 毫米和 1.2 ± 1.1 毫米）。
较短的种植体（6 毫米）与较长的种植体（11 毫米）具有相同的骨整合效果。
