Final answer:
The contraceptive device that causes bone demineralization and requires the intake of calcium and vitamin D is the contraceptive implant.
Step-by-step explanation:
The contraceptive device that causes bone demineralization and requires the intake of calcium and vitamin D is the contraceptive implant. The contraceptive implant is a small rod that is inserted under the skin of the upper arm and releases hormones to prevent pregnancy. One of the potential side effects of the contraceptive implant is bone demineralization, which can be minimized by taking calcium and vitamin D supplements.