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Artificial atlantoaxial joint: Is it a possible option?

Goel A - J Craniovertebr Junction Spine (2015 Oct-Dec)

View Article: PubMed Central - PubMed

Affiliation: Department of Neurosurgery, King Edward VII Memorial Hospital and Seth G.S. Medical College, Mumbai, Maharashtra, India.

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We report “artificial” atlantoaxial joint prosthesis and propose the mechanism of its insertion and function... Although it is premature to state that the artificial atlantoaxial joint will be as effective in its function as an artificial knee or hip joint, the proposed joint model can be a harbinger of further innovations and developments for better designs and material that can provide wider and smoother movements for a longer period of lifetime... The complexity of the surgery, wide range of movements in the region, and devastating effects of possible failures make use of artificial atlantoaxial joint a less attractive option... Our design for artificial atlantoaxial joint incorporates two plates and a ball and socket construction, as shown in the [Figures 1-3]... For the construct to be functional, the two artificial joints on two sides have to work in harmony and in unison... It is also necessary that the movements are limited to the normal human range and does not become excessive... The C1-C2 articulation, ipsilateral transverse ligament, contralateral alar ligaments, and the capsular ligaments limit the degree of movements... Lateral bending at the C1-C2 other than that associated with axial rotation is limited to 6.8° primarily by the alar ligaments... It appears that the proposed artificial atlantoaxial joint will not only assist in facilitating the complex movements that occur at the joint, but can also assist in relieving the symptom of pain that is a result of degenerative arthritis involving the craniovertebral junction... The material used was of medical grade titanium... However, better material that will be superior in its other material properties such as softer metals and plastics are also possible... The implant has not yet been in clinical use... Biomechanical studies are underway.

No MeSH data available.


(a) The implants in position. (b) The implants placed in a dry cadaveric bone
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Figure 3: (a) The implants in position. (b) The implants placed in a dry cadaveric bone

Mentions: Our design for artificial atlantoaxial joint incorporates two plates and a ball and socket construction, as shown in the [Figures 1-3]. Each plate has a socket for screws that fixate it to the facet of atlas and facet of axis. The ball rests on the cup, free to move circumferentially, and restricted only by the ligaments.


Artificial atlantoaxial joint: Is it a possible option?

Goel A - J Craniovertebr Junction Spine (2015 Oct-Dec)

(a) The implants in position. (b) The implants placed in a dry cadaveric bone
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4660488&req=5

Figure 3: (a) The implants in position. (b) The implants placed in a dry cadaveric bone
Mentions: Our design for artificial atlantoaxial joint incorporates two plates and a ball and socket construction, as shown in the [Figures 1-3]. Each plate has a socket for screws that fixate it to the facet of atlas and facet of axis. The ball rests on the cup, free to move circumferentially, and restricted only by the ligaments.

View Article: PubMed Central - PubMed

Affiliation: Department of Neurosurgery, King Edward VII Memorial Hospital and Seth G.S. Medical College, Mumbai, Maharashtra, India.

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

We report “artificial” atlantoaxial joint prosthesis and propose the mechanism of its insertion and function... Although it is premature to state that the artificial atlantoaxial joint will be as effective in its function as an artificial knee or hip joint, the proposed joint model can be a harbinger of further innovations and developments for better designs and material that can provide wider and smoother movements for a longer period of lifetime... The complexity of the surgery, wide range of movements in the region, and devastating effects of possible failures make use of artificial atlantoaxial joint a less attractive option... Our design for artificial atlantoaxial joint incorporates two plates and a ball and socket construction, as shown in the [Figures 1-3]... For the construct to be functional, the two artificial joints on two sides have to work in harmony and in unison... It is also necessary that the movements are limited to the normal human range and does not become excessive... The C1-C2 articulation, ipsilateral transverse ligament, contralateral alar ligaments, and the capsular ligaments limit the degree of movements... Lateral bending at the C1-C2 other than that associated with axial rotation is limited to 6.8° primarily by the alar ligaments... It appears that the proposed artificial atlantoaxial joint will not only assist in facilitating the complex movements that occur at the joint, but can also assist in relieving the symptom of pain that is a result of degenerative arthritis involving the craniovertebral junction... The material used was of medical grade titanium... However, better material that will be superior in its other material properties such as softer metals and plastics are also possible... The implant has not yet been in clinical use... Biomechanical studies are underway.

No MeSH data available.