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Published on: October 18, 2021
Multicenter retrospective analysis of wide-neck dental implants for single molar replacement
Robert A Levine1, Jeffrey Ganeles, Robert A Jaffin
1Perio-Prosthesis and Implantology, University of Pennsylvania School of Dental Medicine, USA. levineddspc@aol.com
Purpose:
To evaluate the predictability of Straumann wide-neck dental implants (6.5-mm prosthetic neck with a 4.8-mm endosseous sandblasted, large-grit, acid-etched-surface body) used for molar replacement.
Materials And Methods:
Four hundred ninety-nine single-tooth implants were restored in molar sites in 410 patients (mean time of loading 23 months; range, 1 to 54 months) by 6 clinicians throughout the United States. Three hundred-fifty nine implants were placed in the mandible and 148 implants in the maxilla.
Results:
The overall cumulative survival rate was 98.4% for all sites (8 failures). Survival rates of 99.2% for mandibular molars (3 failures) and 96.6% for maxillary molars (5 failures) were achieved. Survival rate of implants placed in conjunction with the bone-added osteotome procedure in the maxillary molars was 89%, with 5 of 45 procedures leading to failure.
Discussion:
Minimal restorative problems were encountered. No cases of abutment loosening or fractures were observed for cemented restorations on solid abutments.
Conclusion:
The data suggest that the Straumann solid-screw, wide-neck implants can be a satisfactory choice for molar single-tooth replacement.