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Dynamic fatigue resistance of implant–abutment junction in an internally notched morse‐taper oral implant: influence of abutment design
Author(s) -
Çehreli Murat Cavit,
Akça Kıvanç,
İplikçioğlu Haldun,
Şahin Saime
Publication year - 2004
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.1600-0501.2004.01023.x
Subject(s) - abutment , materials science , implant , dental abutments , dentistry , crown (dentistry) , orthodontics , significant difference , composite material , structural engineering , medicine , engineering , surgery
Purpose: To compare dynamic fatigue resistance of one‐ and two‐piece abutments connected to internally notched morse‐taper oral implants. Material and methods: Sixteen synOcta® ITI® implants were tightened into two metal models. SynOcta® abutments for cement‐retained restorations and solid abutments were divided into two equal groups and were torque‐tightened into the implants. Each implant received a cement‐retained crown. Cyclic dynamic axial and lateral peak loads of 75±5 N were applied on the implants for a duty of 500,000 cycles at 0.5 Hz, and at an angle of 20°. Prior to the experiments and at each 100,000 cycles of loading, periotest values (PTVs) were measured. Removal torque values (RTVs) of the abutments were also measured with a custom‐made torque device at the termination of the experiment. Results: All abutments and implants were clinically immobile and without any signs of mechanical failure. The final PTVs for both abutments were similar and the difference between groups was insignificant ( P >0.05). The RTVs of solid abutments were significantly higher than synOcta® abutments ( P <0.05). Conclusion: Predictable long‐term clinical results can be achieved with solid abutments and synOcta® abutments for cement‐retained restorations. Solid abutments possess higher removal torque resistance than synOcta® abutments when connected to synOcta® ITI® implants.