implant biomechanics
TRANSCRIPT
![Page 1: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/1.jpg)
IMPLANT BIOMECHANICS
- Dr. Hemal Patel
![Page 2: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/2.jpg)
![Page 3: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/3.jpg)
OSSEOINTEGRATION
• Occurs when an implant is inserted into living bone• Connection/bond between living bone and implant
• Key for long term stability
![Page 4: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/4.jpg)
Biomechanics is the interaction between the tissues and organs of the body and the forces acting on them. It is the response of the biologic tissue to the applied loads.
Variables Force, Moment and TorqueConstants Bone and perioral tissues
FORCE
- At rest- In function- Parafunction
- Compressive- Tensile- Shear
Force magnitude, direction, duration, magnification
![Page 5: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/5.jpg)
Three moment arms in implant dentistry:Occlusal height: Div A < Div C, DOcclusal width: Large occlusal table increase the moment impact for any offset occlusal loads. Cantilever length:•Antero-Posterior (A-P)•Parafunction•Arch form
Minimization of these arms are necessary to prevent any implant failure!
Square Ovoid Tapered
![Page 6: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/6.jpg)
Quality: D1, D2, D3, D4
Quantity: A B B-w C-w C-h D
BONE
![Page 7: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/7.jpg)
IMPLANT1. Biomaterial: Ti alloy2. Geometry: - Crest module - Shape: cylindrical, tapered, conical, hybrid et al - Size - Threads: Y/N? Thread geometry, pitch, depth et al - Surface treated: Plasma sprayed, HA coated et al3. Placement and Prosthetic restoration
![Page 8: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/8.jpg)
Implant placement
Conventional placement guided by anatomy and surgical guide after treatment planning!
Tilted implants
![Page 9: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/9.jpg)
9
Platform switching: Use of a smaller-diameter abutment on a larger-diameter implant collar.
Preserves crestal bone level
Provides horizontal component to biologic width; Implant-abutment
interface is shifted inwards
Inflammatory cell infiltrate in non-platform switched (L) &
platform-switched implant (R)
![Page 10: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/10.jpg)
![Page 11: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/11.jpg)
Biomechanical case planning
•Force magnitude, direction, duration type and magnification
•Site: Location, bone, bony undercut
•Type, height, size (length+diameter), functional surface area of implant
•Surgery
![Page 12: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/12.jpg)
To summarize,
•Case based Implant selection: variables – number, shape, threads, pitch, surface, length, diameter, et al.•Elimination of parafunction•DON’T connect implant to natural tooth!•DON’T use wide diameter implants in very dense bone!•Proper occlusion and loading: - Implant protected occlusion - Progressive loading - Cross bite for buccally resorbed • Maxillary anterior: Angled > Straight abutment Steep anterior guidance
![Page 13: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/13.jpg)
Implant-protected occlusion: - increase the surface area of implants- decreasing the width of the occlusal table - reducing the occlusal contacts/no premature contacts, reduced cusp inclination, shallow occlusal anatomy, and wide grooves and fossae- improving the force direction- reducing the magnification of the force
Progressive loading:• D1, D2, D3, D4 : 3, 4, 5, 6 months• Soft diet• Change of occlusal material: No contact acrylic final metal/ceramic
Lateral load
![Page 14: Implant Biomechanics](https://reader030.vdocument.in/reader030/viewer/2022021417/589e38b21a28ab07478b4fb5/html5/thumbnails/14.jpg)
THANK YOU