Patient specific guides for total knee arthroplasty are ready for primetime

Table 1 Different industries with brand names, guide type, implant name and scanning modality

	Dupuy-Synthes	Smith and Nephew	Zimmer	Biomet
PSG	Trumatch	Visionaire	PSI	Signature
Guides	Cut	Cut	Pin	Pin
Implant	Sigma CR	Genesis II	NexGen	Vanguard CR
Imaging protocol	CT1	MRI2	CT or MRI1	CT or MRI1

¹Scan of the hip, knee and ankle join;

²MRI of the knee joint with long leg standing X-ray. PSI: Patient-specific instrument; PSG: Patient specific matched guides; CT: Computed tomography; MRI: Magnetic resonance imaging; CR: Computed radiography.