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Lateral bands
38%
398/1035
Sagittal bands
13%
132/1035
Central slip
15%
153/1035
Oblique retinacular ligament
27%
283/1035
A healed but lengthened terminal extensor tendon
5%
50/1035
Select Answer to see Preferred Response
Hyperextension of the DIP joint from a boutonniere deformity can be treated by the Dolphin tenotomy that divides the terminal extensor mechanism. Near normal extension of the DIP joint is the result of the intact oblique retinacular ligament of Landsmeer. Lateral bands are at the level of the proximal interphalangeal (PIP) joint. Sagittal bands are at the level of the metacarpophalangeal joint and are responsible for maintaining centralization of the extensor tendon at that level. The central slip extends the PIP joint. The corrective effect is immediate and is not determined by a healed extensor tendon at that level.
2.1
(27)
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