Manufacturing method and product

A method of manufacturing a surgical instrument or prosthesis comprising a first material and a second material, the method comprising the following steps:

• injecting the first material into a first mold to form an interim component having a plurality of walls, portions of the interim component defining at least one channel, the maximum wall thickness of the plurality of walls being less than 5 mm, and the maximum width of the at least one channel being less than 5 mm;
• and
• injecting the second material into a second mold containing at least part of the channel of the interim component until the channel is at least partially filled with the second material.

The method of claim 1, wherein at least one of the first material and the second material further comprise at least one additive.

The method of claim 1, wherein the first material and the second material comprises a high or ultra high performance polymer.

The method of claim 1, wherein the method is a method of manufacturing an impactor.

An injection molded surgical instrument or prosthesis, comprising:

• a body having a minimum thickness which exceeds 5 mm;
• wherein the body is formed in a two shot injection molding process using a first material and a second material, the body comprising interlaced portions of said first and second materials arranged such that the maximum thickness of any portion of the first material is less than 5 mm and the maximum thickness of any portion of the second material is less than 5 mm, and wherein the first material and the second material comprise the same plastic.