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Crestal Sinus Lift With Sequential Drills and Simultaneous Implant Placement in Sites With <5 mm of Native Bone: A Multicenter Retrospective Study

Bernardello, Fabio MD, DDS*; Righi, Davide DDS; Cosci, Ferdinando MD, DDS; Bozzoli, Paolo DDS§; Soardi Carlo, Maria MD, DDS; Spinato, Sergio DDS


In the article that appeared on page 439 of the December 2011 issue, the fifth author’s name was incorrect. The author’s name should have appeared as Carlo Maria Soardi, MD, DDS.

Implant Dentistry. 22(2):202, April 2013.

doi: 10.1097/ID.0b013e3182342052
Basic and Clinical Research

Purpose: The aim of this multicenter retrospective clinical study was to evaluate the survival rate of implants placed in the posterior maxilla with a residual bone height of <5 mm.

Materials and Methods: One hundred seventeen patients, recruited from 6 different centers, had 134 implants placed below the maxillary sinus. The patient population consisted of 52 men and 65 women ranging in age from 39 to 78 years (mean age, 53.2 years). Sinus lift procedures were performed following a crestal approach using a specific sequence of drills (Cosci's technique). All implants were submerged. Periapical radiographs were obtained with a paralleling technique and were digitized. The pattern of bone remodeling was subsequently evaluated.

Results: The average (±SD) follow-up time was 48.2 months (±29.30 months; range, 24 to 120 months). Of the original 134 implants placed, 5 implants (3.7%) failed. The implant survival rate was 96.3%. The average residual bone height was 3.46 mm (±0.91 mm) at baseline. The average height of the alveolar crest in the treated implant sites was 9.94 ± 2.29 mm. The radiographic bone gain was 6.48 ± 2.38 mm.

Conclusion: The investigation suggests that this crestal drill approach can be a successful sinus lifting procedure in a severe atrophic maxilla with <5 mm of crestal bone height.

*Private Practice, Legnago VR, Italy.

†Private Practice, Parma PR, Italy.

‡Private Practice, Lamporecchio PT, Italy.

§Private Practice, Caronno Pertusella VA, Italy.

∥Private Practice, Brescia BS, Italy.

¶Private Practice, Sassuolo MO, Italy.

Reprint requests and correspondence to: Sergio Spinato, Via F. Cavallotti 140, 41049, Sassuolo (MO), Italy, Phone: 0039-0536-883868, Fax: 0039-0536-400082, E-mail:

© 2011 Lippincott Williams & Wilkins, Inc.