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The Evaluation of Unscrewing Torque Values of Implant-Abutment Connections: An In Vitro Study.
International Journal of Prosthodontics 2017 January
PURPOSE: This study investigated the stability of titanium screws in implant-abutment connections by measuring the force necessary to induce unscrewing.
MATERIALS AND METHODS: A total of 60 implant-abutment couplings were assigned to two groups (n = 30 each). The sequence 10-20-32 Ncm was tested in Group 1; the sequence 10-20-32-32-32 Ncm was tested in Group 2. The force necessary to unscrew each abutment-implant sample was recorded and statistically analyzed. The significance level was set at P < .05.
RESULTS: Significant differences were found between the two sequences. Group 2 required higher forces than Group 1 to unscrew.
CONCLUSION: The stability of the implant-abutment joint may be improved by tightening with the sequence 10-20-32-32-32 Ncm.
MATERIALS AND METHODS: A total of 60 implant-abutment couplings were assigned to two groups (n = 30 each). The sequence 10-20-32 Ncm was tested in Group 1; the sequence 10-20-32-32-32 Ncm was tested in Group 2. The force necessary to unscrew each abutment-implant sample was recorded and statistically analyzed. The significance level was set at P < .05.
RESULTS: Significant differences were found between the two sequences. Group 2 required higher forces than Group 1 to unscrew.
CONCLUSION: The stability of the implant-abutment joint may be improved by tightening with the sequence 10-20-32-32-32 Ncm.
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