Classification and impression techniques of implants/ dentistry dental implants

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Transcript of Classification and impression techniques of implants/ dentistry dental implants

  • Classification and impression techniques of implants


    Leader in continuing dental education


  • Classification

    Based upon

    Placement within the tissues

    Materials used

    Attachment mechanism

    Surface coating


    Surgical stage

    Mode of insertion

    Tissue response & systemic toxicity effects of implants

  • Subperiosteal implants

    Based upon the placement within the tissue

  • Subdivision of subperiosteal implant





  • Unilateral subperiosteal implant

    Interdental subperiosteal implant

  • Total subperiosteal implant

    Circumferential subperiosteal implant

  • Transosteal implant

    Also known as

    Staple bone

    Mandibular staple


  • Transosteal implant

  • Endosteal implant

  • Root form

    Blade/plate form

    Ramus frame

  • Intramucosal inserts

  • Endodontic stabilizer implant

  • Based upon materials used

    1.Metallic implants-commercially pure titanium

    Titanium alloy

    Cobalt chromium molybdenum


    2.Nonmetallic implants-Ceramics


  • Ceramic and titanium alloy implants

  • Based upon the attachment mechanism


    2.Fibro osseous integration

  • Based upon their surface coating

    Titanium plasma sprayed

    Hydroxyapatite coating

    Grid blasting with TiO


    Acid etched

    Machined surface

  • Based upon the shape

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    With vent holes,without vent holes

    Hollow cylinder,solid screws

    Root form,blade form

  • Based upon the surgical stage

    Two stage implants

    One stage implant

  • Based upon mode of insertion

    1.Axially inserted (crestal approach)

  • 2.Laterally inserted(basal approach)

  • Based upon tissue response &systemic toxicity effects of implants

    Biotolerant materials-polmethylmethacrylate

    Bioinert materials-titanium and aluminium oxide

    Bioactive materials-glass and calcium phosphate ceramic

  • Components of implant

    Implant body

  • Cover screw

    Healing abutment

  • Healing cap

    Implant abutment

  • Impression posts

  • Laboratory analogs


    Ideal Requirements

    Complete plasticity before cureFluidity to record fine detailAbility to wet oral tissuesDimensional accuracyDimensional stabilityComplete elasticity after cureOptimal stiffness

  • Materials Used

    Alginate Agar Polysulphide Polyether Condensation Silicone Addition Silicone


    Poor dimensional stability Poor dimensional accuracy Poor tear strength Poor stiffness Interferes with setting of gypsum

  • AGAR

    Interferes with setting of gypsum Dimensional instability Elaborate equipment needed Low tear resistance

  • Polysulphide

    Base-polusulfide polymer, Catalyst- lead dioxide High tear strength Messy,unpleasant odour Long setting time Poor dimensional stability Hydrophobic

  • Condensation silicone

    Cheaper Good tear strength, accuracy & elastic properties Dimensional instability,due to loss of ethyl alcohol Poured quickly

  • Addition silicone

    Shorter setting time Easy to mix- automatic mixing devices Adequate tear strength Extremely high accuracy Dimensional stability even after 1 week Least distortion on removal Hydrophilic Good compatibility with gypsum

  • Polyether

    Good dimensional stability & accuracy Short setting time Material very rigid Not available in all consistencies Most expensive

  • Dispensed as :

    Manual mixing

    Automixing system

  • Manual mixing

    Putty Heavy body Monophase Light body


  • Automixing equipment & materials

  • Two basic impression techniques for implants are

    1. indirect technique or closed tray technique or pick-up or open tray technique.

  • Indirect impression technique

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  • Direct impression technique

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  • Indirect method

  • Direct method

  • Related articles

    Tautin(1985)presented a technique to accurately, transfer and reproduce the relationship between implant dentures , in which no preliminary impression or acrylic resin custom tray were needed. He used modeling compound to form a custom tray by adapting it over transfer copings,pressing the compound over the superior aspect of the coping so that its circular outline is seen through the compound.After trimming the outline