Single-tooth implants with different neck designs: a randomized clinical trial evaluating the aesthetic outcome

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Abstract

Aim: To evaluate the aesthetic outcome of single-tooth implants in the aesthetic zone with different neck designs from a professional's and patient's perception. Materials and Methods: Ninety-three patients with a missing anterior tooth in the maxilla were randomly assigned to be treated with an implant with a smooth neck, a rough neck with grooves or a scalloped rough neck with grooves. Implants were installed in healed sites. One year after definitive crown placement (18 months post-implant placement), photographs were taken and the aesthetic outcome was assessed according to two objective aesthetic indexes: pink esthetic score/white esthetic score (PES/WES) and implant crown aesthetic index (ICAI). A questionnaire was used to assess the aesthetic outcome and general satisfaction from a patient's perception. Standardized radiographs were taken to measure marginal bone level changes. Results: One implant was lost. Although there was a significant difference in marginal bone loss between the different implant neck designs (smooth neck 1.19 +/- 0.82mm, rough neck 0.90 +/- 0.57mm, scalloped neck 2.01 +/- 0.77mm), there were no differences in aesthetic outcome. According to the professional's assessments using PES/WES and ICAI, 79.3% and 62% of the cases showed acceptable crown aesthetics, and 59.8% and 56.5% of the cases showed acceptable mucosa aesthetics. Overall, patients were satisfied about the aesthetics of the mucosa (81.5%) and crown (93.3%), and general patient satisfaction was high (9.0 +/- 1.0 out of a maximum of 10). According to the professional's assessment, a pre-implant augmentation procedure was associated with less favorable aesthetics of the mucosa. Conclusion: This study shows that the aesthetics of single-tooth implants in the maxillary aesthetic zone appears to be independent of the implant neck designs applied but dependent on the need for pre-implant surgery.

Original languageEnglish
Pages (from-to)311-321
Number of pages11
JournalClinical Implant Dentistry and Related Research
Volume15
Issue number3
DOIs
Publication statusPublished - Jun-2013

Keywords

  • aesthetics
  • dental implant
  • esthetics
  • implant neck
  • single tooth
  • soft tissue
  • MARGINAL BONE LEVEL
  • RADIOGRAPHIC EVALUATION
  • SOFT-TISSUE
  • SUBMERGED IMPLANTS
  • TITANIUM IMPLANTS
  • DENTAL IMPLANTS
  • PATIENT
  • SATISFACTION
  • IMMEDIATE
  • ZONE

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