OBJECTIVE: This study determined the degree of marginal microleakage of the abutment-implant interface on platforms with Morse taper connection and external connection. MATERIALS AND METHODS: For this in vitro study, 42 implants, 21 with external connection and 21 with Morse 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 Newton (N) tightening (3) External connection, 30 N tightening (4) Morse taper connection, manual tightening (5) Morse taper connection, 20 N tightening (6) orse 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 Mann-Whitney 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.
OBJECTIVE: This study determined the degree of marginal microleakage of the abutment-implant interface on platforms with Morse taper connection and external connection. MATERIALS AND METHODS: For this in vitro study, 42 implants, 21 with external connection and 21 with Morse 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 Newton (N) tightening (3) External connection, 30 N tightening (4) Morse taper connection, manual tightening (5) Morse taper connection, 20 N tightening (6) orse 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 Mann-Whitney 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.
Authors: José Paulo Macedo; Jorge Pereira; Brendan R Vahey; Bruno Henriques; Cesar A M Benfatti; Ricardo S Magini; José López-López; Júlio C M Souza Journal: Eur J Dent Date: 2016 Jan-Mar
Authors: Pedro Molinero-Mourelle; Andrea Roccuzzo; Burak Yilmaz; Walter Yu Hang Lam; Edmond H N Pow; Jaime Del Río Highsmith; Miguel Gómez-Polo Journal: Clin Oral Implants Res Date: 2022-07-21 Impact factor: 5.021
Authors: Ignacio Gonzalez-Gonzalez; Hector deLlanos-Lanchares; Aritza Brizuela-Velasco; Jose-Antonio Alvarez-Riesgo; Santiago Llorente-Pendas; Mariano Herrero-Climent; Angel Alvarez-Arenal Journal: Int J Environ Res Public Health Date: 2020-06-14 Impact factor: 3.390
Authors: Larrucea V Carlos; Navarro C Carlos; Larrucea Sm Karina; Boda K Sunil; Padilla E Carlos; Lobos G Olga Journal: Clin Exp Dent Res Date: 2021-06-20