s10 - Supra-structure components Flashcards
What are the components of prosthetic soft tissue shaping?
Healing abutments, provisional restorations, final abutments, soft tissue sculpting techniques.
What is the function of healing abutments in soft tissue shaping?
Shape the gingiva during healing to form a proper emergence profile.
What is the role of provisional restorations in soft tissue shaping?
Help contour soft tissue for optimal esthetics and gingival architecture.
How do final abutments contribute to soft tissue shaping?
Maintain soft tissue form established by healing abutments and provisionals.
What are healing abutments?
Transgingival components placed to shape gingiva after uncovering the implant.
What are pre-fabricated healing abutments?
Manufacturer-made in various sizes and shapes for general use.
What are customized healing abutments?
Prefabricated ones modified with composite to shape gingiva specifically.
What are CAD/CAM healing abutments?
Digitally designed abutments milled to precise soft tissue shape.
What is the clinical purpose of healing abutments?
Guide soft tissue healing and emergence profile.
When are healing abutments placed?
After the implant is uncovered during the second-stage surgery.
What are non-contoured prosthetic abutments?
Abutments needing full preparation to fit the final prosthesis.
What are contoured abutments?
Pre-prepared by manufacturer, needing minor adjustments.
What are castable abutments?
Waxed and cast to custom shape in a lab.
What are CAD/CAM abutments?
Digitally designed and milled for custom fit.
What is platform switching?
Using narrower abutments on wider implants to preserve bone and soft tissue.
What is the role of abutments in implant prosthodontics?
Connect implant to the prosthesis and shape soft tissue.
What are screw-retained restorations?
Restorations attached using a screw through the crown.
What are the advantages of screw-retained restorations?
Retrievable, easy to tighten, no cement residue.
What are the disadvantages of screw-retained restorations?
Limited by implant angulation, may be unesthetic.
What are cement-retained restorations?
Restorations cemented over abutments.
What are the advantages of cement-retained restorations?
Better esthetics, not dependent on angulation.
What are the disadvantages of cement-retained restorations?
Risk of excess cement, hard to retrieve.
What cements are recommended for cement-retained restorations?
Temporary cement or zinc phosphate cement.
What are risks of subgingival excess cement?
Soft tissue recession, bone loss, peri-implantitis.
What is the function of provisional restorations?
Maintain esthetics, function, evaluate occlusion, phonetics, shape soft tissue.
What is immediate provisionalization?
Placing a provisional at the time of implant placement.
What is the role of provisionals in progressive bone loading?
Gradually increase load to adapt bone before final prosthesis.
Why are provisionals used for esthetic evaluation?
To assess soft tissue contours, phonetics, and smile design.
What are superstructures in removable prosthodontics used for?
Retaining overdentures, fixed options, maxillofacial prostheses.
What are bar-clip attachments?
Bar splinted to implants, clip retained in denture base.
List advantages of bar-clip attachments.
High retention, implant splinting, good stability.
List disadvantages of bar-clip attachments.
Mucosal hyperplasia, bulkiness affects function.
What are magnetic attachments?
Magnet in denture + keeper on implant.
Advantages of magnetic attachments?
Easy hygiene, low lateral stress, ideal for geriatrics.
Disadvantages of magnetic attachments?
Limited rotation, may be bulky.
What are ball & socket attachments?
Ball abutment with matrix in denture for retention.
Advantages of ball & socket attachments?
Easy maintenance, good retention, patient acceptance.
What are locator attachments?
Low-profile abutments with resilient caps for retention.
Advantages of locator attachments?
Allow implant angulation, easy use, different heights available.
List biological failures in implant prosthodontics.
Peri-implantitis causing soft tissue and bone loss.
List mechanical failures in implant prosthodontics.
Screw loosening/fracture, implant or abutment fracture.
