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Creep or plastic deformation happens when subjected to intra-oral stresses such as chewing or grinding. Creep causes the amalgam to flow and protrudes from the margin of the cavity forming unsupported edges. "Ditch" is formed around the margins of the amalgam restoration after fracture due to amalgam creep at the occlusal margins.
Amalgam is a metallic filling material composed from a mixture of mercury (from 43% to 54%) and a powdered alloy made mostly of silver, tin, zinc and copper, commonly called the amalgam alloy. [16] Amalgam does not adhere to tooth structure without the aid of cements or use of techniques which lock in the filling, using the same principles as a ...
Through his research, he also explored joint preservation techniques, including distal femoral osteotomy for valgus knee deformities and patellar instability, and ankle distraction arthroplasty, demonstrating improved mechanical alignment, patient outcomes, and intermediate-term success in treating complex orthopedic conditions.
A patellar tendon graft was used. Discoloration of the left leg is from swelling that drained from the knee to the shin. The patellar tendon connects the patella (kneecap) to the tibia (shin). The graft is normally taken from the injured knee, but in some circumstances, such as a second operation, the other knee may be used.
When amalgam fillings are drilled for height adjustment, repair or replacement, some mercury-containing amalgam is inevitably washed down drains. (See Dental amalgam controversy - Environmental impact) When amalgam fillings are prepared by dentists, improperly disposed excess material may enter landfills or be incinerated. Cremation of bodies ...
ACL reconstruction is a commonly practiced technique for ACL injury, conducted on 30% of patients, which manages to restore stability to the knee structure. [ 2 ] [ 14 ] Traditional ACL reconstructions uses autografts or allografts which demand a long rehabilitation time and in most cases, develop donor morbidity in the long term.
Knee replacement, also known as knee arthroplasty, is a surgical procedure to replace the weight-bearing surfaces of the knee joint to relieve pain and disability, most commonly offered when joint pain is not diminished by conservative sources. [1] [2] It may also be performed for other knee diseases, such as rheumatoid arthritis.
Sometimes, a tooth is planned to be restored with an intracoronal restoration, but the decay or fracture is so extensive that a direct restoration, such as amalgam or composite, would compromise the structural integrity of the restored tooth or provide substandard opposition to occlusal (i.e., biting) forces. In such situations, an indirect ...