| 摘要 |
<p>A dental apparatus for perforating the cortical plate of human maxillary and mandibular bones comprises a solid metal needle (11) moulded into a plastics shank (12), the shank being formed with means (14) for cooperating with a dental contra-angle or straight handpiece into which the shank may be inserted. The shank (12) has a collar (16) at its front end, and a hollow protective cap (17) is removably fitted over the exposed needle (11) and engages the collar.</p> |
