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By DR Fayza Maqbool
SCIENCE OF DENTAL MATERIALS DEPARTMENT 1
ANKYLOSIS A condition of joint/tooth immobility resulting
from any oral pathology, surgery or direct contact with bone.
BIOACCEPTANCE Ability to be tolerated in a biological environment in spite of adverse effects.
BIOCOMPATIBILITY Ability of a material to elicit an appropriate biological response in a given application in the
body.
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BIOACTIVITY The capability of promoting the formation of
hydroxyapatite and bonding to bone. BIOINTEGRATION
The process in which bone and other living tissue becomes integrated with an implanted
material with no intervening space.
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OSTEOINTEGRATION Process in which living bony tissue forms to
within 100 Å of the implant surface without any intervening fibrous connective tissue.
OSTEOINDUCTION Process of promoting bone formation
through a mechanism that induces the formation of osteoblasts.
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ENDOSTEAL IMPLANT A device that is placed into the alveolar
and/or basal bone of maxilla or mandible which transects only one cortical bone.
EPITHELIAL IMPLANT A device placed within the oral mucosa.
SUBPERIOSTEAL IMPLANT A dental device placed within the periosteum
and overlies cortical bone.
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IMPLANTATION Process of grafting or inserting a material such as an inert foreign body or tissue within
the body. REPLANTATION
Reinsertion of a tooth back into its socket soon after accidental or intentional removal.
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PASSIVATION Process of transforming a chemically active
metal surface into a less active surface. TEXTURING
Process of increasing surface roughness of the area to which bone can bond.
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SURGICAL PROCEDURE STEP 1: INITIAL SURGERY
STEP 2: OSSEOINTEGRATION PERIOD STEP 3: ABUTMENT CONNECTION STEP 4: FINAL PROSTHETIC RESTORATION
Success Rates
lower jaw, front – 90 – 95%
lower jaw, back – 85 – 90%
upper jaw, front – 85 – 95%
upper jaw, back – 65 – 85%
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• It is made by titanium and shaped like a screw. • Placed in the jawbone it serves as a secure root for the new tooth. • Restorations such as crowns, bridges or dentures can be attached.
Replace a missing tooth
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Replace multiple missing teeth
Replace an edentulous arch
Dental implants are used to:
4 TYPES I. ENDOSTEAL IMPLANTS: II. SUBPERIOSTEAL IMPLANTS; III. TRANSOSTEAL IMPLANTS: IV. EPITHELIAL IMPLANTS:
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ACTUAL PROSTHESIS
TRANSMUCOS--AL ABUTMENT
THE IMPLANT FIXTURE
First Implant Design by Branemark
All the implant designs are obtained by the modification of existing designs.
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Pre Op
Post Op
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Most popular implant material used today is titanium.
Pure titanium Ti-6Al-4V
Plasma spraying Acid etching Blasting with aluminum oxide
Mainly two types
Metallic Non-metallic
Titanium and its alloys. Stainless steel Co-Cr-Mo alloy
Most popular implant material. Gold standard among implant materials. A typical implant consists of a titanium screw
(resembling a tooth root) with a roughened or smooth surface.
Dental implants are made out of commercially pure titanium,
available in 4 grades depending upon the amount of carbon and iron.
Several favorable physical properties include Low specific gravity. High heat resistance. High strength comparable with stainless
steel. Corrosion resistant.
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ELI contains low level of oxygen Low level of oxygen increases ductility of ELI
alloy. Ti-6Al-4V alloy Implant surfaces may be
modified either by plasma spraying, anodizing etching or sandblasting to increase the surface area and the integration potential of the implant.
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Schnitman & Schulman (1979) gave criteria as 1) Clinically, mobility of an implant must be less
than 1mm. 2) No radiolucencey. 3) Bone loss should be less than 1/3rd the height of
implant. 4) Should be an absence of infection & damage to
structures. 5) Success must be 75% or more after 5 yrs of
functional service.
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Albrekisson et al (1986) gave the following criteria 1) The individual unattached implant must be is
immobile when tested clinically. 2) Radiograph must not have any periapical
translucency. 3) Vertical bone loss must be less than 0.2mm annually
following the implant’s first yr of service. 4) Performance must be characterized by the absence
of any infection, pain, neuropathies, parasthesia or violation of mandibular canal.
5) Minimum criteria for success must be 85% and 80% at the end of 5 and 10 yrs of observation period.
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