Dental Implants

Dental Implants – Screwed Joints

Screwed Joint is one way of joining implant superstructures to the abutment. Screwed Joint functions by virtue of its components being held tightly together by the tension in the screw acting after the fashion of a spring.

Advantages
1. Retrievability
2. Control of Gap
3. Predictable Future Failure

Disadvantages
1. Mechanical Failure. It can be problematical
2. access holes
3. Contamination. It can permit ingress of material and microorganisms from the mouth
4. Angulation Problems.

Reconstruction Grafts for Alveolar Ridge

In reconstruction procedures in Dental Implant Cases, autogenous grafts are preferred to allogenic materials. It has been accepted by several implantologists that the main handicap with autogenous grafts is the secondary wound site. There’s an increase in infection risk in the donor site from which the graft is taken.

There also an alternative method of creating sufficient bone volume to allow reliable implant placement. The procedure is basically to sandwich bone grafts between the buccal and palatal cortices after carefully splitting the alveolar ridge.

Bone Volume for Dental Implants

Surgical Methods to Create Bone Volume for Dental Implants

1. Autogenous bone grafts
2. Guided bone regeneration
3. Allogenic demineralized bone powder and hydroxyapatite
4. Titanium mesh with bone grafts technique
5. Distraction osteogenesis
6. Interpositional bone grafts

Bone Graft

Most bone augmentation procedures involve the use of bone grafts. The best material for a bone graft is the patient’s own bone, which most likely will come from chin or ramus. If the dentist can not get enough bone from these areas, he or she may need to get bone from the patient hip or shin bone (tibia) instead. The hip is considered to be a better source because the hip bone has a lot of marrow (soft tissue within the bone), which contains bone-forming cells.
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Bone Augmentation

The jawbone must have enough bone to support dental implants. There may be no enough bone because of tooth loss from periodontal (gum) disease, injury or trauma, or a developmental defect. If the jaw is too short (up and down), too narrow (side to side), or both, a procedure is needed to add bone to the jaw before dental implants can be placed.
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