Die Erfindung betrifft einen im Wesentlichen kugelförmigen Implantatkörper (20), dessen Oberfläche mindestens teilweise durchbrochen ist von im Durchmesser einstellbaren Poren, mit einer inneren Struktur aus von Schalen (22) umgebenen Hohlräumen, wobei die Hohlräume ein Hohlraumsystem bilden, dessen Hohlräume im Durchmesser einstellbar und durchgehend interkonnektierend verbunden sind, wobei das Hohlraumsystem der inneren Struktur durch die Oberfläche des Implantatkörpers nach außen geöffnet ist, wobei der Implantatkörper einen Durchmesser zwischen 0,8 mm und 12 mm aufweist.Spherical, polymorphous or other-form chambered implant parts consist of (A) a partial or complete thick or thin shell with partial or mixed smooth, rough or structured surfaces diametrically penetrated by round(-like), optionally uniform pores； and (B) an inner structure consisting of specified cavities interconnected to the shell. Spherical, polymorphous or other-form chambered implant parts consist of (A) a partial or complete thick or thin shell with partial or mixed smooth, rough or structured surfaces diametrically penetrated by round(like), optionally uniform pores； and (B) an inner structure consisting of a cavity or a conglomerate of spherical shell-covered cavities in direct contact via the shell to the outer shell and connecting to included spherical cavities or hollow spheres, such cavities being interconnected via a diametrical pore system in the shell and the outer shells being open to the exterior. Independent claims are also included for (1) composite implants comprising an implant combined with another implant of different porosity with or without a filler and effective agent and with its cavity system partially or completely filled, the combination being such that the latter implant is mechanically arranged along a central axis, a central cylinder being cut or grinded out or produced in the production of the first implant； (2) composite implants consisting of an implant with a
