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Microleakage of the prosthetic abutment/implant interface with internal and external connection: In vitro study
Author(s) -
Larrucea Verdugo Carlos,
Jaramillo Núñez Guido,
Acevedo Avila Ariel,
Larrucea San Martín Carlo
Publication year - 2014
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/clr.12217
Subject(s) - connection (principal bundle) , abutment , materials science , morse code , dentistry , implant , orthodontics , composite material , structural engineering , engineering , medicine , surgery , electrical engineering
Objective This study determined the degree of marginal microleakage of the abutment–implant interface on platforms with M orse taper connection and external connection. Materials and methods For this in vitro study, 42 implants, 21 with external connection and 21 with M orse taper connection, were used, immersed in acrylic resin cylinders. Each implant was joined by a prosthetic abutment screw tightened at different degrees, forming the six study groups: (1) External connection, manual tightening (2) External connection, 20 N ewton ( N ) tightening (3) External connection, 30 N tightening (4) Morse taper connection, manual tightening (5) Morse taper connection, 20 N tightening (6)Morse taper connection, 30 N tightening. All samples were subjected to load cycling and thermocycling. Then, they were submerged in a solution of 0.2% methylene blue for 24 h. Finally, the microleakage was measured via 20× optical microscopy in each study group, average was obtained, and M ann– W hitney test was applied. Results Statistically significant differences ( P < 0.001) were found between the levels of microleakage presented in the Morse taper connection implants (1.48) and external connection implants (2.8) in all three types of tightening. Microleakage levels decreases when increasing torque is applied to the screws. Conclusion Morse taper connection implants showed lower levels of microleakage than external connection implants; also, it was observed that microleakage decreases in the way torque increases.