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A 5-Year Prospective Clinical Study of Submerged and Nonsubmerged Paragon System Implants in the Edentulous Mandible
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Oral and Maxillofacial Surgery.
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2010 (English)In: International Journal of Prosthodontics, ISSN 0893-2174, Vol. 23, no 3, 231-238 p.Article in journal (Refereed) Published
Abstract [en]

Purpose: The aim of this investigation was to evaluate the clinical outcome of two different surgical protocols in the edentulous mandible: submerged and nonsubmerged. Further, the Paragon dental implant with a titanium plasma-sprayed surface was evaluated. Materials and Methods: Twenty-nine consecutively treated patients with 168 implants supporting fixed prostheses were included. All but 3 patients were provided 6 implants, placed via nonsubmerged healing on one side and submerged healing on the other. Data were collected from patient records and radiographs. Twenty-four patients participated in the 5-year clinical follow-up examination, Results: After 5 years, all patients still had their mandibular fixed prostheses in function. Cumulative survival rates were 100% for prostheses and 99.4% for implants. However, 3 implants fractured in 1 patient. One submerged implant was lost before loading but no further implants were lost during follow-up. The radiographic bone loss was small for all implants with a mean of 0.14 mm (standard deviation [SD]: 0.37) at 1 year and 0.42 mm (SD: 0.48) at 5 years for nonsubmerged implants and 0.17 mm (SD: 0.32) at 1 year and 0,51 mm (SD: 0.33) at 5 years for submerged implants. Nineteen implants (including the 3 that fractured) presented annual bone loss exceeding 0.2 mm after the first year, yielding a cumulative success rate of 86.2% after 5 years. Conclusion: Single-stage surgery was shown to have the same predictability as two-stage surgery in the anterior edentulous mandible. Paragon implants with a titanium plasma-sprayed surface showed a fracture rate of 2.2% and a success rate of 86.2% after 5 years. Int J Prosthodont 2010;23:231-238.

Place, publisher, year, edition, pages
2010. Vol. 23, no 3, 231-238 p.
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URN: urn:nbn:se:uu:diva-135567ISI: 000278617200008OAI: oai:DiVA.org:uu-135567DiVA: diva2:377563
Available from: 2010-12-14 Created: 2010-12-07 Last updated: 2013-08-15Bibliographically approved

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Hirsch, Jan
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