Dental implant assembly and abutment thereof

Abstract

A dental implant assembly includes an implant, an abutment, and a fixing element. The implant is placed in the alveolar bone. The abutment is assembled to the implant and includes a tapered position-restricting part and an elastic pressing part. The tapered position-restricting part has an abutment fixing channel substantially matching the tapered position-restricting outer wall of the tapered position-restricting trench. The elastic pressing part includes the elastic pressing structures extended from the tapered position-restricting part. The fixing element includes the fixing head and the fixing rod extended from the fixing head. A tolerance allowable gap is formed between the abutment fixing channel and the fixing rod. As the abutment is assembled to the implant, the elastic pressing structures press against the position-restricting wall first to hinder the relative rotation therebetween; when an offset error exists, the tolerance allowable gap allows the fixing rod to penetrate the abutment fixing channel.

What is claimed is: 
     
         1 . An abutment of a dental implant assembly, assembled to an implant of the dental implant assembly, which is applied to be placed in the alveolar bone and has a tapered position-restricting trench surrounded by a position-restricting wall, and the abutment comprising:
 a tapered position-restricting part, having an abutment fixing channel along an abutment central axis, and having a tapered position-restricting outer wall substantially engaged with the tapered position-restricting trench, wherein a tilted position-restricting angle is formed between the tapered position-restricting outer wall and the abutment central axis; and   an elastic pressing part, comprising a plurality of elastic pressing structures extended from the tapered position-restricting part to tapered position-restricting part, wherein a tilted pressing angle formed between the elastic pressing structures and the abutment central axis is smaller than the tilted position-restricting angle;   wherein a fixing element is utilized for penetrating the abutment fixing channel to fix the abutment on the implant; when the abutment is assembled to the implant, the elastic pressing structures press against the position-restricting walls before the tapered position-restricting part such that the elastic pressing structures are elastically deformed to hinder relative rotation between the abutment and the implant because the tilted pressing angle is smaller than the tilted position-restricting angle; and   wherein the elastic pressing part further comprises a plurality of end elastic pressing structures bent from one end of the elastic pressing structures respectively, and the end elastic pressing structures are bent toward the abutment central axis to make both an inner wall and an outer wall of each one of the end elastic pressing structures tilted with respect to each one of the elastic pressing structures.   
     
     
         2 . The abutment of a dental implant assembly of  claim 1 , wherein a tilted end structure angle is formed between the end elastic pressing structure and the abutment central axis, and the tilted end structure angle is greater than the tilted pressing angle. 
     
     
         3 . The abutment of a dental implant assembly of  claim 1 , wherein the elastic pressing structures are a plurality of elastic pressing plates spaced apart from each other. 
     
     
         4 . The abutment of a dental implant assembly of  claim 1 , wherein the tapered position-restricting trench is a tapered polygonal position-restricting trench, and the tapered position-restricting part is a tapered polygonal position-restricting part.