Journal of the Korean Association of Oral and Maxillofacial Surgeons : eISSN 2234-5930 / pISSN 2234-7550

Table. 6.

Table. 6.

Screw loosening according to the implant–abutment connection type and implant prosthesis retention type

Screw loosening χ2 P-value

No Yes
Implant–abutment connection type Internal hex 873 (94.6) 50 (5.4) 8.504 0.004*
External hex 916 (91.1) 89 (8.9)
Type of retention Cement 1,011 (95.1) 52 (4.9) 19.026 0.000*
Screw 778 (89.9) 87 (10.1)

* P<0.05.

Values are presented as number of implants (%).

J Korean Assoc Oral Maxillofac Surg 2020;46:133~142
https://doi.org/10.5125/jkaoms.2020.46.2.133
© JKAOMS