Medical implant and method of implantation

Abstract

A medical implant and a method of implanting a medical implant are disclosed. The medical implant ( 20 ) is elongate and for fixation in a patient, and comprises an apical bone anchoring portion ( 200 ) for bone apposition, and an unthreaded coronal portion ( 210 ), wherein said coronal portion ( 210 ) has a length (L 2 ) exceeding or equaling a length (L 1 ) of said apical portion ( 200 ), and wherein said apical portion ( 200 ) has a maximum outer diameter (D 1 ) that is equal to or larger than a maximum outer diameter (D 2 ) of said coronal portion. In a method of implanting a medical implant, an apical part is affixed in the zygomatic bone, and a coronal part is positioned outside the maxilla in the mucous membrane.

1 . An elongate zygoma implant for fixation in a patient, said implant comprising
 an apical bone anchoring portion configured for apposition to a zygomatic bone of said patient, and   a non-threaded coronal portion, wherein   said coronal portion has a length (L 2 ) exceeding or equaling a length (L 1 ) of said apical portion, wherein said apical portion has a maximum outer diameter (D 1 ) that is equal to or larger than a maximum outer diameter (D 2 ) of said coronal portion, and wherein the total length of the apical bone anchoring portion and the non-threaded coronal portion is in a range of 30 mm to 55 mm.   
     
     
         2 . The implant according to  claim 1 , wherein a ratio of a length of said apical portion (L 1 ) to said length of said coronal portion (L 2 ) is in a range of 0.2 to 0.5. 
     
     
         3 . The implant according to  claim 2 , wherein a ratio (D 1 /D 2 ) of a said maximum outer diameter (D 1 ) to said maximum outer diameter (D 2 ) of said coronal portion is in a range of 0.5 to 0.95. 
     
     
         4 . The implant according to  claim 3 , wherein said maximum outer diameter (D 2 ) of said coronal portion is smaller than a diameter of valleys of threads at said apical portion. 
     
     
         5 . The implant according to  claim 1 , wherein said apical bone anchoring portion comprises a tapered top portion, wherein said tapered top portion is tapered towards an apical end of said implant and an apical end diameter is less than half of said maximum outer diameter of said apical portion (D 1 ). 
     
     
         6 . The implant according to  claim 5 , wherein said tapered top portion is tapered with a tapering angle (α) in a range between 25 to 75 degrees. 
     
     
         7 . The implant according to  claim 1 , wherein said coronal portion is rotationally asymmetrical. 
     
     
         8 . The implant according to  claim 1 , wherein said coronal portion is tapered towards a coronal end of said medical implant. 
     
     
         9 . The implant according to  claim 1 , wherein a recess of a connection interface at a coronal end of said implant is substantially oriented in a longitudinal direction of said medical implant. 
     
     
         10 . The implant according to  claim 1 , wherein said medical implant is made of a monolithic single piece. 
     
     
         11 . The implant according to  claim 1 , wherein said apical bone anchoring portion comprises a helical thread for said bone anchoring. 
     
     
         12 . (canceled) 
     
     
         13 . The implant according to  claim 1 , wherein said coronal portion is configured for gingiva apposition. 
     
     
         14 . The implant according to  claim 1  any of the preceding claims, wherein said coronal portion is configured for partial radial apposition to bone tissue and partial radial apposition to non-bone tissue along a longitudinal portion of said medical implant. 
     
     
         15 - 28 . (canceled)