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Clin Oral Implants Res. 2016 Apr;27(4):452-7. doi: 10.1111/clr.12587. Epub 2015 Apr 9.

A prospective, multicenter study assessing the DENTSPLY Implants, OsseoSpeed(™) TX, length 6 mm in the posterior maxilla and mandible: a 1-year follow-up study.

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Department of Periodontology, Peking University School of Stomatology, Beijing, China.
The first dental center, Peking University School of Stomatology, Beijing, China.
The 2nd dental center, Peking University School of Stomatology, Beijing, China.



The aim of this multicenter study was to prospectively assess clinical and radiographic outcomes of short implants (length 6 mm) in the posterior region and early-loading with splinted-fixed dental prostheses.


A total of 45 subjects (77.8% with chronic periodontitis) were enrolled at three study sites. In total, 95 implants (diameter 4 mm, length 6 mm; OsseoSpeed(™) 4.0 S; DENTSPLY Implants; Mölndal, Sweden) were placed, two or three implants per subject, using one-stage surgery and loaded with a screw-retained splinted ceramic-fixed prosthesis 6 weeks later. Clinical and radiographic examinations were performed preoperatively, post-surgery, at loading, and 6 and 12 months after prosthesis placement.


Four implants failed before loading; all other implants showed favorable clinical and radiographic findings throughout the observation period (1-year survival and success rate: 95.8%). Postoperative pain and swelling were negligible. Mean changes in marginal bone levels measured from loading were minimal (0.01 ± 0.37 and -0.13 ± 0.46 mm after 6 months and 1 year, respectively). Bone loss less than 1.00 mm was found in 77.5% implants, and bone gain was found in 15.5% implants. Probing depth change less than 2 mm was found in 98.7% of the implants between loading and 1-year follow-up. Prosthetic complications included one ceramic veneer chipping.


One-year data indicate that the use of 6-mm-long implants is a predictable treatment. This provides a good treatment option in situations with limited bone height in posterior regions.


early-loading; implant; marginal bone loss; periodontitis; posterior; short

[Indexed for MEDLINE]

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