J Korean Assoc Oral Maxillofac Surg.  2014 Feb;40(1):17-20. 10.5125/jkaoms.2014.40.1.17.

Survival rate of Astra Tech implants with maxillary sinus lift

• Yoon WJ
• Jeong KI
• You JS
• Oh JS
• Kim SG

• KMID: 1960967
• DOI: http://doi.org/10.5125/jkaoms.2014.40.1.17

Abstract

OBJECTIVES
The aim of this study was to retrospectively evaluate the clinical survival rate of Astra Tech implants in the maxillary molar region performed with sinus lift and bone graft.
MATERIALS AND METHODS
Ninety-nine Astra Tech implants (Osseospeed) placed in the maxillary molar region using sinus lift from September 2009 to February 2012 were selected with a minimum follow-up period of 1 year. The height of alveolar bone, sinus approach technique, bone material and implant survival rate were evaluated.
RESULTS
Of the 99 implants, the survival rate was 90.9%; 8 implants failed within 1 year after implant placement, and 1 implant failed 1 year after implant loading. All failed implants were placed with sinus lift simultaneously. The average height of alveolar bone before implant placement was 6.9 mm, while the height of alveolar bone of failed implants was 2.1 mm, on average.
CONCLUSION
Astra Tech implants placed in the maxillary molar region had generally good survival rates, but the relationship between reduced pre-implant alveolar bone height and implant failure requires further attention.

Keyword

Sinus floor augmentation; Dental implants

MeSH Terms

Dental Implants
Follow-Up Studies
Maxillary Sinus*
Molar
Retrospective Studies
Sinus Floor Augmentation
Survival Rate*
Transplants
Dental Implants

Figure

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  Fig. 1 Radiographic measurement of residual bone height (A: mesial residual bone height, B: distal residual bone height). A : X or B : X=actual residual alveolar bone height : actual implant height.

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