Implant comprises an implant body partially provided with a protective layer which dissolves in contact with a bodily fluid and/or bone. Independent claims are also included for the following: (1) Packing with the above implant； and (2) Method for treating an implant. Preferred Features: The protective layer is made from a salt which is present in human bodily fluid and consists of cations selected from sodium, potassium, magnesium and calcium and anions selected from chloride and phosphate. The layer is 1-100 nm, preferably 1-10 nm thick.
