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Single implants with different neck designs in the aesthetic zone: a randomized clinical trial
Author(s) -
den Hartog Laurens,
Meijer Henny J. A.,
Stegenga Boudewijn,
Tymstra Nynke,
Vissink Arjan,
Raghoebar Gerry M.
Publication year - 2011
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2010.02109.x
Subject(s) - medicine , dentistry , implant , maxilla , soft tissue , anterior maxilla , radiography , orthodontics , surgery
Objectives: To compare single implants in the aesthetic zone with different neck designs for marginal bone‐level changes and clinical outcome measures. 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 1.5 mm smooth neck (“smooth group”), a moderately rough neck with grooves (“rough group”) or a scalloped moderately rough neck with grooves (“scalloped‐group”). Implants were installed in healed sites and were loaded after 3 months. Follow‐up visits were conducted at 6 and 18 months after implant placement. Results: The scalloped group showed significantly more radiographic bone loss from implant placement to 18 months (2.01 ± 0.77 mm) compared with the smooth group (1.19 ± 0.82 mm) and rough group (0.9 ± 0.57 mm). Furthermore the scalloped group showed significantly deeper pocket depths and a higher bleeding score. There were no between‐group differences in soft tissue levels. Survival rates were 97% for the smooth group and 100% for the rough and scalloped groups ( P >0.05). No significant differences in outcome were found between the smooth group and rough group. Conclusion: For anterior tooth replacements, implants with a scalloped neck showed more marginal bone loss and less favourable clinical outcome compared with implants with a 1.5 mm smooth neck or implants with a rough neck. To cite this article:
den Hartog L, Meijer HJA, Stegenga B, Tymstra N, Vissink A, Raghoebar GM. Single implants with different neck designs in the aesthetic zone: a randomized clinical trial.
Clin. Oral Impl. Res . 22 , 2011; 1289–1297.
doi: 10.1111/j.1600‐0501.2010.02109.x