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Clin Oral Implants Res. 2013 Nov;24(11):1257-64. doi: 10.1111/j.1600-0501.2012.02569.x. Epub 2012 Aug 27.

Osteotome sinus floor elevation with and without grafting material in the severely atrophic maxilla. A 1-year prospective randomized controlled study.

Author information

1
Ardentis Clinique Dentaire Vevey, Swiss Dental Clinics Group, Vevey, Switzerland; Department of Stomatology and Oral Surgery, School of Dental Medicine, University of Geneva, Geneva, Switzerland.

Abstract

OBJECTIVES:

(1) To measure and compare endo-sinus bone levels around implants randomly placed with an osteotome sinus floor elevation (OSFE) procedure in grafted (control) and non-grafted (test) sinuses, (2) to evaluate the OSFE efficacy with short, tapered, and chemically modified hydrophilic surfaced implants in extremely atrophic maxillae, (3) to show that fused corticals may constitute a complication risk.

MATERIAL AND METHODS:

The TE(®) SLActive 8 mm-long implants (Straumann AG) were placed using an OSFE procedure in 4 mm or less of bone height. Healing time before prosthetic rehabilitation was 10 weeks. One year after implant placement, bone levels were measured on standardized periapical radiographs.

RESULTS:

Thirty-seven (17 tests, 20 controls) implants were placed in 12 patients with a mean maxillary residual bone height (RBH) of 2.4 ± 0.9 mm. Before loading, two control implants failed (RBH 1.4 and 1.2 mm); two others rotated at loading (one test, RBH 0.9 mm; one control, RBH 1.5 mm) but were uneventfully loaded after three additional months of healing. These adverse events and complications occurred when implants were placed in merged corticals. Endo-sinus bone gain was 3.9 ± 1.0 and 5.0 ± 1.3 mm for the test and control groups (P = 0.003). The 1-year success rate was 100% and 90%, respectively (P = 0.49).

CONCLUSION:

Although more bone is gained when grafting material is used, this may not be required to promote endo-sinus bone gain. The OSFE procedure with or without grafting material could be efficient when the RBH is ≤ 4 mm. However, when both corticals merged, the risk of complication could increase.

KEYWORDS:

atrophic maxilla; bone gain; bone graft; bone regeneration; crestal bone loss; dental implants; internal sinus lift; no grafting; osteotome sinus floor elevation; posterior maxilla; prospective randomized clinical trial; sinus-lift

[Indexed for MEDLINE]

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