Disclosed is an apparatus for implant-bar-supported restoration that includes a superstructure and a plurality of dental bars. At least two of the plurality of dental bars have different shapes or different sizes, and the superstructure is coupled with the plurality of dental bars. Also disclosed is a dental bar including a plurality of separate pieces, wherein: each of the plurality of pieces is shaped and configured to be coupled with a dental implant； each of the plurality of pieces is shaped and configured to be coupled with a superstructure； and each of the plurality of pieces has a different shape or different size.
