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CC BY-NC-ND 4.0 · Eur J Dent 2017; 11(04): 521-525
DOI: 10.4103/ejd.ejd_44_17
Original Article
Dental Investigation Society

Awareness of basic life support among Saudi dental students and interns

Hashem Motahir Al-Shamiri
1   Department of Oral and Maxillofacial Surgery, Al-Farabi Colleges, Riyadh, Saudi Arabia
,
Sadeq Ali Al-Maweri
2   Department of Oral Medicine and Diagnostic Sciences, Al-Farabi Colleges, Riyadh, Saudi Arabia
3   Department of Oral Medicine, Faculty of Dentistry, Sanaa University, Sanaa, Yemen
,
Bassam Shugaa-Addin
1   Department of Oral and Maxillofacial Surgery, Al-Farabi Colleges, Riyadh, Saudi Arabia
,
Nader Ahmed Alaizari
2   Department of Oral Medicine and Diagnostic Sciences, Al-Farabi Colleges, Riyadh, Saudi Arabia
,
Abdulrahman Hunaish
1   Department of Oral and Maxillofacial Surgery, Al-Farabi Colleges, Riyadh, Saudi Arabia
4   Department of Oral Surgery, Ibb University, Ibb, Yemen
› Author Affiliations
Further Information

Publication History

Publication Date:
01 October 2019 (online)

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ABSTRACT

Objective: The objective of this study was to compare the torque and detorque values of screw intermediates of external hexagon, internal hexagon, and Morse taper implants in single restorations before and after mechanical cycling. Materials and Methods: The study sample was divided into three groups (n = 10) as follows: group EH - external hexagon implant, group IH - internal hexagon implant, and group MT - Morse taper implant. Universal abutments were screwed on the implants, and metal crowns were cemented onto the abutment. The samples were submitted to a mechanical testing of 1 million cycles, with a frequency of 8 cycles per second under a 400 N load. The application and registration of the screw torque (T0) and detorque (T1) values of the intermediate were performed before and after the test. The results were statistically evaluated by analysis of variance (ANOVA) and Tukey′s test (α = 0.05). Results: There was no difference between the values of T0 and T1 in the intra-group samples. However, the inter-group difference in T0 between the EH (12.8 N cm) and MT (18.6 N cm) groups and in T1 between the EH (10.4 N cm) and IH (13.8 N cm), EH and MT (19.4 N cm), and MT and IH (P = 0.001) groups were significant. The MT group showed a lower variation of T0 and T1. Conclusion: The internal implants, particularly MT, showed better stability in these cases when used for single restorations.

Key words:

Dental implant - dental prosthesis - dental prosthesis retention - fatigue
 

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