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Volume 31 , Issue 6
November/December 2016

Pages 1264–1272

Influence of Four Different Abutment Materials and the Adhesive Joint of Two-Piece Abutments on Cervical Implant Bone and Soft Tissue

Christian Mehl, Dr Med Dent Habil/Volker Gaβling, Dr Med Dr Med Dent Habil/Stephan Schultz-Langerhans, Doctoral Student/Yahya Açil, Prof Dr Rer Nat/Telse Bähr, Dr Med Vet/Jörg Wiltfang, Prof Dr Med Dr Med Dent/Matthias Kern, Prof Dr Med Dent Habil

PMID: 27861650
DOI: 10.11607/jomi.5321

Purpose: The main aim of this study was to evaluate the influence of four different abutment materials and the adhesive joint of two-piece abutments on the cervical implant bone and soft tissue. Materials and Methods: Sixty-four titanium implants (Camlog Conelog; 4.3 × 9 mm) were placed bone level into the edentulous arches of four minipigs. Four different types of abutments were placed at implant exposure: zirconium dioxide, lithium disilicate, and titanium bonded to a titanium luting base with resin cement; one-piece titanium abutments served as the control. The animals were sacrificed 6 months after implant exposure, and the bone-to-implant contact (BIC) area, sulcus depth, the length of the junctional epithelium and the connective tissue, the biologic width, and first cervical BIC–implant shoulder distance were measured using histomorphometry and light and fluorescence microscopy. Results: Overall, 14 implants were lost (22%). At exposure, the implant shoulder–bone distance was 0.6 ± 0.7 mm. Six months later, the bone loss was 2.1 ± 1.2 mm measured histomorphometrically. There was a significant difference between the two measurements (P ≤ .0001). No significant influence could be found between any of the abutment materials with regard to bone loss or soft tissue anatomy (P > .05), with the exception of zirconium dioxide and onepiece titanium abutments when measuring the length of the junctional epithelium (P ≤ .01). The maxilla provided significantly more soft tissue and less bone loss compared with the mandible (P ≤ .02). Conclusion: All tested abutment materials and techniques seem to be comparable with regard to soft tissue properties and the cervical bone level.

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