Implant 1 Flashcards
Subperiosteal and transosteal implants uses ?
are designed primarily to anchor dentures in completely edentulous patients
Edosteal implants shape ?
- By shape into = blade form (plate form) and root form
Blades are wedge shaped or rectangular in cross section
What’s the diameter of root shaped endosteal implants ?
Root forms are 3 to 6 mm in diameter and 8 to 20 mm long,
often with external threads
What’s The one-stage endosteal ?
Placed in the bone and to immediately project through mucosa into the oral cavity
Whts two-stage procedure ?
two surgical procedures
1.The implant is placed in bone to the level of the cortical plate and the oral mucosa is sutured over it; this is left for a prescribed healing period
- The mucosa is reflected from the superior surface of the implant, and an extension collar or abutment that projects into the oral cavity is fastened to the implant
What are the Absolute contraindications for implants ?
based on immediate surgical and aesthetic risks, are limited to the presence of acute illness, uncontrolled metabolic disease, and pregnancy
What’s the other contraindications for implant ?
*Abnormal bone metabolism
*Poor oral hygiene
*Have undergone previous irradiation of the implant site
*Suspicion that hygiene will continue to be inadequate is a relative contraindication to implant placement
Some patients may not be able to improve their hygiene
What’s The threaded root shaped implants ?
straight and tapered
A one-piece implant design has been developed that combines
the threaded implant body, the transmucosal abutment, and the pillar for crown cementation in a single piece
In clinical evaluation what should the dentist have to evaluate , and in what help the palpitation ?
- The dentist determines whether bone is adequate and identifies anatomic structures that could interfere with ideal implant placement
- Visual inspection and palpation allow the detection of flabby excess tissue, bony ridges, and sharp underlying osseous formations
- Radiographic Evaluation is also necessary(CT)
When the dentist have to use Diagnostic waxings and surgical templates ?
are essential when implants are planned as part of a full-mouth reconstruction or when the anterior esthetic zone is restored
What’s surgical templates ?
Guide template used to assist the proper surgical placement and angulation of dental implants
To maximize success, the implant should be placed where ?
entirely within bone and away from significant anatomic structures
How much ideal bone structure the implant need and what’s the benefits ?
Ideally 10 mm of vertical bone dimension and 6 mm of horizontal
** Placement at these dimensions prevents encroachment on anatomic structures and allows 1.0 mm of bone on both the lingual and facial surfaces of the implant
How much minimum distance between 2 implants and why we should have it ?
3mm
This space is needed to ensure bone viability between the implants and to allow adequate oral hygiene once the restorative procedures are complete
What should the ideal implant location most provide ?
- Implant location dictates the appearance, contour, and long-term function of the prosthesis
- To prevent damage, staying at least 1.0 mm away from the adjacent natural tooth is essential, but staying as close to the natural tooth as possible is also important
3.acceptable contours can be created by the restorative dentist
To minimize harmful lateral forces, the long axis of the implant should be positioned where ?
in the central fossa of the restoration
How to place the implant to ensure the optimal emergence profile of the restoration?
- Superoinferior placement
- superior surface of the implant should be 2.5 to 3.0 mm directly inferior to the emergence position of the planned restoration, particularly when the restoration is to be located in the anterior esthetic zone
What happen If the lengthening is too short ?
The restoration will be overcontoured or look unnatural
Restoration size must always be considered during the treatment planning stage so that a properly sized implant is placed in the ideal location
Why soft tissue panning is important in esthetic zone , how it most look , and which condition destruct this appearance ?
- To give maximum esthetic soft tissue contour .
- Done by Achieving a completely formed papilla between the implant restoration and the adjacent teeth
- If the interdental tissue and underlying bone have already been lost before implant placement, it may not be possible to achieve ideal papillary contours
The choice of abutment size depends on what in esthetic zones ?
- the vertical distance between the fixture base and opposing dentition
- the existing sulcular depth
- esthetic requirements in the area being restored
For acceptable appearance in the posterior part of the maxilla or mandible fixtures may require what ?
margin termination at or below the gingival crest
For an anterior maxillary crown which material and how much subgingival needed to create the proper emergence profile and appearance ?
2 to 3 mm of subgingival porcelain at the facial gingival margin
In which cases Framework fit should be checked on multiple-unit restorations ?
If abutment margins are no more than 1 mm subgingival
What does Periodontal probing of the sulcus after the healing cap is removed serve ?
reveals the space available for subgingival extension and can be performed at the time of abutment placement or after a period of tissue healing around an interim restoration
When these measurements have been made, the correct abutment is attached to the implant
Why all of this consecration about abutment is important ?
The abutment length can have a dramatic effect on restoration contours
Why does single tooth implant most used ?
Placement of the implant for both esthetics and biomechanical loading (to minimize screw loosening) is especially crucial
What’s impression coping ?
1.Impression copings facilitate transfer of the intraoral location of the implant or abutment to a similar position on the laboratory cast.
- With the transfer impression coping in place, an impression is made intraorally, after radiographs are taken to confirm complete engagement
What’s impression coping classification ?
- They may screw into the implant or onto the abutment and are customarily subdivided into two types: fixture and abutment
- Both of these can be further subdivided into transfer (indirect) and pickup (direct) types
