Overdenture prosthetic treatment is an alternative to a fully bone supported and retained dentures. It provides an effective, if not superior method of treatment. Overdentures can be advantageous, both functionally and esthetically for patients with post surgical or congenital defects. If defects exist, esthetics can be improved by increasing or decreasing the amount of denture base material.
Overdenture prosthetic treatment
The use of dental implants in edentulous patients was first developed by Dr. Per Ingvar Branemark and the type of restorative treatment studied and used was the fully bone anchored denture. After implant placement, healing and subsequent denture insertion, the bone reaches a steady state. This is a balance between forces transmitted through the dentures and implants and bone remodelling capabilities.
Implant Supported Fixed Bridges. Photo credit: Dr. Stephen Almonte
Treatment planning is the most important factor for successful results and is an integral part of good communication between the periodontist and the prosthodontist.
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Black gums and Allergic Inflammation of gums
This really is frequently triggered by low quality alloy. Lesser quality alloys frequently contain non-refined metallic elements which yield toxic substances throughout formulation. These non-refined metallic elements contain lead, cadmium, iron, mercury along with other undesirable elements.
Porcelain fused to tilite metal fixed partial denture.
The success of a Dental Implant treatment depends on adherence to Dental Implant Surgery principles, the Prosthodontic aspect of the treatment, and proper Dental Implant Maintenance.
There are two types of Dental Implant Surgery according to number of stages; the single stage and the two stage dental implant surgery. The type of surgery may increase or decrease the dental implants cost.
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A good brand of particulate allograft is Puros Allografts by Zimmer. From its line of allografts for bone augmentation, puros cancellous particulate allograft has become the bone grafting of choice for many dentists.
Cancellous particulate allograft acts as an osteoconductive scaffold for new bone formation. In large volume of applications, studies have shown faster bone regeneration at 6 months than grafts containing sintered bovine bone matrix. While in small volume applications, regeneration of hard bone has been reported as early as 3-5 months.
Cancellous particulate allograft retains osteconductive properties due to preservation of the natural bone matrix collagen and mineral composition, trabecular pattern, and original porosity enabling the ingrowth of vascular and cellular connective tissue.
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Perforated Lingual or Buccal There will be no problem if the fixture threads are imbedded in bone.
Perforated Bone Coronally Do a bone graft procedure if fixture threads are exposed at the coronal. Section small amounts of bone, mix with Resorbable Tissue Replacement, then place the bone graft material over the exposed threads.
Bone Graft Procedure on buccal bone plate. Photo credit: Oris Neobiotech
For final tightening of the dental implant, torque ratchet is used. It is also used to measure the exact torque of the dental implant. Over threading is also prevented by using the torque ratchet. Over threading could strip all threads in bone.
Neobiotech torque ratchet is used to measure the exact torque of the dental implant. Photo credit: Oris Neobiotech
The dental implant fixture mount is attached to the fixture using the open ended wrench. The inner hexagonal surface should fit properly over the fixture head. Match the inner surface of the handpiece connector to the square top of the fixture mount and apply gentle pressure between the components.
When the apex of the fixture is threaded and no longer visible, begin irrigation. Photo credit: Oris Neobiotech
The direction indicators are inserted into the dental implant site to check and maintain parallelism during preparation.
Poor fixture alignment
If the angle with adjacent fixture is less than 35 degrees, there will be not be a major problem prosthetically.
Direction indicators are inserted after each twist drill procedure is completed to verify parallel fixture sites. Photo credit: Oris Neobiotech
Copious saline irrigation is required in the use of any drilling instruments. A surgical splint is used to determine dental implant fixture insertion site. In the maxilla, a fixture for 11 or 21, is placed 3 mm from the midline suture line.
After pilot drilling is done, the fixture site is enlarged using a 3.0 mm diameter twist drill. The procedure is important for preparing the implant fixture site to proper depth. The indicator mark on the drill should be level with the bony margin.
Use the twist drill to finalize enlargement fo dental implant fixture site. Photo credit: Oris Neobiotech