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Single implants with different neck designs in the aesthetic zone: a randomized clinical trial
Laurens den Hartog1, Henny J A Meijer, Boudewijn Stegenga
1Department of Oral and Maxillofacial Surgery, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands. l.den.hartog@kchir.umcg.nl
Clinical Oral Implants Research
|October 12, 2011
Summary
Dental implants with scalloped necks resulted in more bone loss and poorer outcomes compared to smooth or rough neck implants in the aesthetic zone. Smooth and rough neck implants demonstrated comparable clinical results.
Area of Science:
- Dental Implantology
- Periodontology
- Prosthodontics
Background:
- Aesthetic zone anterior tooth replacement requires careful consideration of implant design.
- Marginal bone loss and clinical outcomes are key indicators of implant success.
Purpose of the Study:
- To compare marginal bone-level changes and clinical outcomes of single dental implants with different neck designs in the aesthetic zone.
- Evaluate the impact of smooth, rough, and scalloped implant neck designs on anterior maxilla replacements.
Main Methods:
- Ninety-three patients with missing anterior maxillary teeth were randomized into three groups: smooth neck, rough neck, or scalloped neck implants.
- Implants were placed in healed sites and loaded after 3 months, with follow-up at 6 and 18 months post-placement.
Main Results:
- The scalloped neck group exhibited significantly greater marginal bone loss (2.01 mm) at 18 months compared to smooth (1.19 mm) and rough (0.9 mm) neck groups.
- Scalloped implants also showed deeper pocket depths and higher bleeding scores, with no significant difference in soft tissue levels between groups.
- Implant survival rates were high across all groups (97-100%), and no significant differences were found between smooth and rough neck implant outcomes.
Conclusions:
- Scalloped neck implants are associated with increased marginal bone loss and less favorable clinical outcomes in anterior aesthetic zone replacements.
- Smooth and rough neck implant designs demonstrate comparable and favorable results for anterior tooth replacement.
- Implant neck design is a critical factor influencing bone stability and clinical success in aesthetic zone restorations.
