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The International Journal of Oral & Maxillofacial Implants
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Int J Oral Maxillofac Implants 27 (2012), No. 5     15. Sep. 2012
Int J Oral Maxillofac Implants 27 (2012), No. 5  (15.09.2012)

Page 1239-1242, PubMed:23057040


Experimental Custom-Made Zirconia Abutments for Narrow Implants in Esthetically Demanding Regions: A 5-year Follow-Up
Vanlıoglu, Burçin Akoglu / Özkan, Yasar / Evren, Buket / Özkan, Yasemin Kulak
Purpose: This prospective clinical study evaluated an experimental custom-made zirconia abutment with respect to peri-implant hard and soft tissue reaction in narrow implants.
Materials and Methods: Patients were treated with prefabricated titanium implants and custom-made zirconia abutments. All-ceramic crowns were fabricated and cemented with resin cement. Clinical parameters such as Plaque Index, Sulcus Bleeding Index, peri-implant probing depth, and radiographic marginal bone loss levels were recorded, along with any biologic and mechanical complications, at baseline and up to 5 years.
Results: Twelve patients with missing maxillary lateral incisors treated with a total of 23 implants were evaluated. Thirteen Straumann Narrow Neck Solid Screw implants with a diameter of 3.3 mm and 10 Astra MicroThread implants with a diameter of 3.5 mm were used. Six patients with 11 implants were treated with custom-made zirconia abutments and prefabricated metal abutments were used in the control group. Implant and abutment success at 5 years was 100%. No abutment fractures occurred. Abutment screw loosening was reported for one restoration at the 1-year recall. Mean marginal bone loss measured 0.21 mm after 5 years of functional loading.
Conclusion: Custom-made zirconia abutments offered sufficient stability to support all-ceramic restorations over narrow implants in anterior regions over a 5-year period. The soft and hard tissue reactions to zirconia were favorable.

Keywords: clinical follow-up, full ceramic crowns, narrow implants, zirconia abutment