A Pilot Study of Joint Stability at the Zirconium or Titanium Abutment/Titanium Implant Interface

Loosening of the fixing screw in single implant crowns: predisposing factors, prevention and treatment options

“…There are various types of implant abutments depending on the material (metal or ceramic) or shape (straight or inclined) and on fabrication (cast, prefabricated or CAD/CAM). Currently, metal abutments are most often used, although the zirconia prosthetic abutments of high strength can be considered as an equally favorable option in clinical practice, On the other hand, Cavusoglu et al suggested that the interface of zirconium abutment and titanium implants may be susceptible to wear of the abutment and deformation of the implant neck …”

Fatigue induced changes in conical implant–abutment connections

“…It is known that unloaded dental implants exhibit a microgap after abutment assembly and prior to loading, whereas limited literature exists with regard to the size of the microgap after fatigue loading [26,35,36]. The evaluation of the microgap has either been performed in a limited number of specimens [26] and/or using scanning electron microscopy to capture the size of the gap between implant and abutment only at the implant shoulder [35].…”

“…The overall amount of wear debris on the titanium abutment was smaller compared to the Zirconia abutment, which might be attributed to the fact that the adhesion and wear pattern between titanium-to-titanium surface differ from that found in zirconia-to-titanium surface which is purely abrasive [21]. Wear can already be detected at forces of 30 N [36]. The signs of wear seen in the present investigation allow the assumption that micromotion of the abutment regardless of the geometry/length of the conical mating zone exists.…”

Load to failure of different zirconia abutments for an internal hexagon implant

“…These include zirconia fracture and wear of the titanium implant body at the zirconia interface. [4][5][6][7][8][9][10] Wear of the implant body at the abutment interface has been compared for titanium and zirconia 1-piece abutments after various intervals of cyclic loading in vitro 4 and quantified with scanning electron microscopy and image analysis software. Implants paired with zirconia abutments experienced a greater initial rate of wear and more overall wear than implants with titanium abutments.…”