sigmoid

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Related to sigmoid notch: submandibular fossa, malar process

sigmoid

[′sig‚mȯid]
(biology)
S-shaped.
References in periodicals archive ?
The dorsal and volar distal radioulnar ligaments, the main components of dorsal and volar marginal portions of TFC, respectively, extended from dorsal and volar rims of the sigmoid notch to the base of the ulnar styloid process.
Mandibular alterations may be unilateral or bilateral and include enlarged mandibular and mental foramen, widened inferior alveolar canal, branching of mandibular canal, hyperostosis, deepened sigmoid notch, elongated condylar neck, rarefied condylar and coronoid process, medial concavity in mandibular ramus, decreased or flat gonial angle, irregular inferior cortex, and cyst like lesions [1-4, 6].
2) As the forearm reaches the midrange of rotation, 40% to 60% of the ulnar head is maintained within the sigmoid notch; at the extremes of rotation, as little as 10% of the ulnar head is within the sigmoid notch.
The presence of intact sigmoid notch is essential for any reconstructive procedures after chronic DRUJ injuries.
Two parallel lines were cut, beginning in the depth of the sigmoid notch and carried downwards at an angle of 45 degrees at the posterior border of the ascending ramus.
The introduction of the PRECISE SD system extends SBi's wrist management portfolio following its rollout of the RE-MOTION[TM] Total Wrist Implant and STABILITY Sigmoid Notch Total DRUJ System[TM] - incorporating Precise Guidance Technology[TM] that assists surgeons with anatomical placement in wrist arthroplasty and reconstruction procedures.
Group IV: fracture of the condylar neck, with the fracture line more than half above a perpendicular line through the sigmoid notch to the tangent of the ramus.