Fabrication of a tooth–borne mouthstick for a Quadriplegic
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Transcript of Fabrication of a tooth–borne mouthstick for a Quadriplegic
Contents
• Patient history
• Background condition
• Possible treatment options
• Treatment option of choice
• Laboratory procedures
Patient History
• 12 Year old female• Diagnosed with
Guillian–Barré syndrome
• Permanent resident at Tygerberg hospital
• Quadriplegic
About Guillian-Barré syndrome
• It is a syndrome, not a disease• There is no cure• Attack directed at mayelin – insulation component
of the nerves• Affects 1 in 100 000 people • No particular race, gender or age group• Causes paralysis• 75 – 90 % partial or total recovery2
Condition and background information
• Needs appliance to facilitate use of a computer
• Quadriplegic – limited head movement
• Connected to respirator• Weak masseter muscles• Eruption of permanent
dentition
Background
• Prosthesis was made by occupational therepist
• Prosthesis was retained by bite forces
• Prosthesis caused pain in Masseter muscles
Possible treatment options
• Tooth–borne oral device
• A telescopic oral device
• Extra–oral chin cap
Tooth–borne oral device
Advantages:• No biting forces required• Inexpensive to fabricate• Simple to use • Occlusal forces equally distributed
Disadvantages:• Length cannot be altered3
Telescopic oral device
Advantages:• Length of extending stick can be altered• No biting forces required• Patient is self-supporting
Disadvantages:• Heavy in mass• Difficult to fabricate and use • Expensive to fabricate• Requires maintenance2
Extra–oral chin cap
Advantages:• Easy to communicate with• Easy to keep clean
Disadvantages:• Uncomfortable for patient• No independence • Complicated to use2
Most suitable treatment option
The tooth-borne device
Reasons:
• Inexpensive• Simple to use• Easy to fabricate• Not necessary to extend or retract the device
Laboratory procedures continued
• Extra-oral mechanical parts designed, then manufactured by engineering company
• Parts made from aluminium• Extra–oral rod has magnetic
tip• Various tips made to
accommodate patient• Tip snaps in position
Laboratory procedures continued
• Special dentarum screw-sleeves used to secure mechanical part in position on gum-guard
References:
1. A.J.Cloran. Telescopic mouth instruments for severely handicapped patients. Journal of Prosthetic Dentistry. 1974; 32(4): 435-438.
2. Hentschke, P. (2002) Guillian-Barré syndrome. (Web document). Available: http://www.medweb.pc.edu/students/med2003/miller1/guillain.html
3. J.Smokler. Mouthstick prosthesis for a patient with arthrogryposis multiplex congenita. Journal of Prosthetic Dentistry. 1979; 42(3): 316-321.