7
Latitude Elbow Prosthesis
3 Radial head
• The radial head is a key anatomical structure of the elbow.
Sixty percent of compressive loads are transferred across
the radio-humeral joint (fig. 10) Morrey et al, JBJS 70-A
1988.
• Without the radio-humeral joint, loading on the
ulno-humeral joint is increased contributing to the risk
of instability and premature wear.
• The placement of the Latitude elbow radial component
is based on the flexion-extension axis.
• 4 sizes of heads (Ø 18, 20, 22 and 24 mm) and 2 stem
diameters (5.0 mm and 6.5 mm).
The Latitude
®
Elbow radial component enables the surgeon
to maintain the radio-humeral joint when anatomical
alignment is adequate.
The radial component has been designed to replicate
the radio-ulnar articulation.
The radial component is a bipolar design with +/- 10°
of motion to balance load transfer (fig. 11).
The cobalt chrome ring of the radial head component
articulates with the polyethylene of the ulnar component
(fig. 12).
Latitude Elbow Prosthesis Surgical Technique UCLT101
(fig. 10)
(fig. 11)
100 %
40 %
60 %
Radio-
humeral
contact
Radio-
ulnar
contact
(fig. 12)
+/- 10°
GN VALIDATION
2. ANATOMICAL DESIGN VALIDATION
TO LATITUDE INT UCLT101.qxd:Mise en page 1 7/07/10 15:00 Page 7
