The higher was the simulated occlusal interference the stronger vertical forces (in axis Y) affected right articular disc
and the slighter vertical forces acted on left articular disc
; forces in axis X decreased in both articular discs
while lateral forces in axis Z increased almost twice in right and decreased almost three times in left articular disc
Group 1 patients (n = 12) were treated with orthognathic surgery only and group 2 patients (n = 25) were treated with high condylectomy articular disc
repositioning, and orthognathic surgery.
The TFCC was described by Palmer and Werner (1) as a homogenous structure composed of an articular disc
, dorsal and volar radioulnar ligaments, a meniscus homologue, the ulnar collateral ligament (UCL), and the sheath of the extensor carpi ulnaris (ECU).
To qualify for surgery, patients with severe TMJ pain and dysfunction underwent a magnetic resonance imaging (MRI) study to confirm the presence of an "internal derangement," a painful disruption of the relationship between the piece of cartilage essential for smooth jaw movement, known as the articular disc
, and the condyle, the rounded top of the lower jaw bone.
In the 1980s and 1990s, aggressive, invasive procedures were popular, including implants that replaced the articular disc
When retrieving documentation from a CD-ROM tax service in printed or electronic form, note the copyright restrictions reproducing its contents under the license to use a articular disc
The TFCC is comprised of several structures including a biconcave articular disc
that is contiguous with the articular surface of the distal radius.
Proper instruments must be available to carry out a complete diagnostic arthroscopy, as well as to perform various operative procedures, such as debridement (torn ligamentous tissue and/or hypertrophic synovium), repair (peripheral tear of the articular disc
of the TFCC), and resection of local bone (radial styloidectomy or wafer resection of the distal ulna).
Another study evaluated 22 patients treated with the metal fossa-eminence implant while retaining the articular disc
and 26 patients in which the articular disc
was removed (12).
The fibrocartilaginous articular disc
is biconcave, dividing the joint space into superior and inferior compartments; this relationship is well seen in the presence of joint effusion (Figure 2).
I believe that progression of this disease is as follows: Hormones mediate biochemical changes within the TMJ, causing hyperplasia of the synovial tissues; this stimulates production of destructive substrates that initiate breakdown of the ligamentous structures that normally support and stabilize the articular disc
Interposed between the condyle and the fossa is a piece of dense, avascular fibrous connective tissue, the TMJ articular disc