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RO Sapphire blades create the recipient sites. They are not a way of extracting hair. This is the most common misunderstanding behind the term: “sapphire FUE” describes the instrument used to open the channels the grafts are placed into, while extraction is still follicular unit excision with a punch. A clinic offering sapphire blades is describing one step of the operation, not a different operation.
What the published comparisons show is that they do not agree, and an honest summary has to report both:
| Study | Finding |
|---|---|
| Saket, J Maxillofac Oral Surg | Higher graft survival in the sapphire group (94.7%) than the steel group (88.9%) |
| Balik, laser Doppler flowmetry | In 12 patients with each recipient area split between the two, handmade razor slits caused significantly less tissue damage than sapphire percutaneous blades |
The second study made a further point that is easy to lose: ischaemia in the recipient bed relates both to the instrument and to how many grafts are placed per square centimetre. The blade is one variable among several, and not the dominant one.
What decides the result is the geometry of the sites rather than the material of the edge — the angle each channel is opened at, its depth, its spacing, and the density chosen for that area of scalp. A sapphire blade used at the wrong angle produces a worse result than a steel blade used at the right one.
Related terms
For how the extraction step itself works, see the FUE technique. For the implantation method that places grafts without pre-made channels, see the DHI technique.
