Implant comprising: - a dense portion, with a material density by volume greater than 70%, preferably greater than 80%, and even more preferably between 95% and 99%, and for example equal to 99%, and - a porous portion connected to said dense portion by a connection zone, said porous portion comprising an average macroporosity characterised by: ∘ an average material density determined for the entire volume of said porous portion of between 30% and 70% by volume; ∘ cavities delimited at least partially by side walls defining cavity sections; said dense portion and said porous portion define at least partially an external surface of the implant; said cavities open onto said external surface; said porous portion is defined by a repetition of a first basic pattern; characterized in that: the implant is made of a biocompatible ceramic of synthetic origin obtained by additive manufacturing; said cavity sections each have an extension such that it is possible to fit each of said cavity sections in a circle having a diameter ranging from 0.3 mm to 1.2 mm; wherein said porous portion is defined by a repetition of a first basic pattern in three dimensions; said first basic pattern being of a triply periodic minimal surface type, for example of a gyroid type. - a dense portion, with a material density by volume greater than 70%, preferably greater than 80%, and even more preferably between 95% and 99%, and for example equal to 99%, and - a porous portion connected to said dense portion by a connection zone, said porous portion comprising an average macroporosity characterised by: ∘ an average material density determined for the entire volume of said porous portion of between 30% and 70% by volume; ∘ cavities delimited at least partially by side walls defining cavity sections; said dense portion and said porous portion define at least partially an external surface of the implant; said cavities open onto said external surface; said porous portion is defined by a repetition of a first basic pattern; characterized in that: the implant is made of a biocompatible ceramic of synthetic origin obtained by additive manufacturing; said cavity sections each have an extension such that it is possible to fit each of said cavity sections in a circle having a diameter ranging from 0.3 mm to 1.2 mm; wherein said porous portion is defined by a repetition of a first basic pattern in three dimensions; said first basic pattern being of a triply periodic minimal surface type, for example of a gyroid type. ∘ an average material density determined for the entire volume of said porous portion of between 30% and 70% by volume; ∘ cavities delimited at least partially by side walls defining cavity sections; said dense portion and said porous portion define at least partially an external surface of the implant; said cavities open onto said external surface; said porous portion is defined by a repetition of a first basic pattern; characterized in that: the implant is made of a biocompatible ceramic of synthetic origin obtained by additive manufacturing; said cavity sections each have an extension such that it is possible to fit each of said cavity sections in a circle having a diameter ranging from 0.3 mm to 1.2 mm; wherein said porous portion is defined by a repetition of a first basic pattern in three dimensions; said first basic pattern being of a triply periodic minimal surface type, for example of a gyroid type. said dense portion and said porous portion define at least partially an external surface of the implant; said cavities open onto said external surface; said porous portion is defined by a repetition of a first basic pattern; characterized in that: the implant is made of a biocompatible ceramic of synthetic origin obtained by additive manufacturing; said cavity sections each have an extension such that it is possible to fit each of said cavity sections in a circle having a diameter ranging from 0.3 mm to 1.2 mm; wherein said porous portion is defined by a repetition of a first basic pattern in three dimensions; said first basic pattern being of a triply periodic minimal surface type, for example of a gyroid type. the implant is made of a biocompatible ceramic of synthetic origin obtained by additive manufacturing; said cavity sections each have an extension such that it is possible to fit each of said cavity sections in a circle having a diameter ranging from 0.3 mm to 1.2 mm; wherein said porous portion is defined by a repetition of a first basic pattern in three dimensions; said first basic pattern being of a triply periodic minimal surface type, for example of a gyroid type.