Tapered Screw Implants With Different Machined Neck Designs: A 3-Year Split-Mouth Randomized Controlled Prospective Study

(a) Implant placement in the control group (CAM-). (b) Implant placement in the test group (CAM+).

(a) Healing abutments screwed to the control implants (CAM-). (b) Healing abutments screwed to the test implants (CAM+).

Marginal bone resorption differences between the means of the control (CAM-) and test (CAM+) implants adjusted for the subject from the delivery of the temporary prosthesis (T₀) to 36 months postloading. The red line illustrates the overall mean of the differences within subjects between CAM- and CAM+ implants weighted for the number of implants; the black lines represent the difference within subjects of the two mean values between CAM- and CAM+ implants in each subject.