Classification and impression techniques of implants/ dentistry dental implants

of 72 /72
Classification and Classification and impression impression techniques of techniques of implants implants INDIAN DENTAL ACADEMY Leader in continuing dental education

Embed Size (px)


Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.

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

  • Contd.



    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

  • Contd

  • Contd

  • Contd


  • Contd

  • Direct impression technique

  • Contd

  • Contd

  • Contd

  • Contd

  • Contd

  • Contd

  • Contd

  • Contd

  • Contd

  • Contd

  • Contd


  • 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 of the coping showing through the top of the tray an impression plaster is used to record and transfer the coping to the impressions

  • Loos(1986)presented a detail technique for the fabrication of a fixed prosthesis supported by implants.His technique incorporated plugging the incisal end of the transfer coping with beading wax(to prevent impression material from flowing into it)splinting the transfer copings with orthodontic ligature wire and Duralay acrylic resin,use of a plastic perforated impression tray with incisal window to access the transfer coping and making the final impression with putty light body addition silicone.

  • Rasmussen(1987)presented a technique in which the existing denture is modified using tissue conditioning material is used instead of healing caps after second stage surgery ,eliminating the use of impression copings at the final impression.

  • Humphries et al (1990) evaluated the accuracy of implant master casts constructed from transfer impressions using three techniques.The techniques used were splinted square polymer copings,unsplinted square polymer copings and unsplinted hydrocolloid copings.Tapered hydrocolloid copings were more accurate than the other two methods.

  • Carr (1991) compared impression techniques for five implant mandibular model by both indirect and direct transfer coping techniques and found that for the models used ,the direct method produced more accurate working casts.

  • Vigolo et al(2000)evaluated the accuracy in transferring the position of the hexagonal head of a single implant to the working cast, and concluded that the sandblasting and coating the roughened surface of the impression coping with an impression adhesive will result in more accurate orientation of the implant replicas in the laboratory master casts in single tooth implant restorations.

  • Conclusion

    Success with implant prosthodontics requires a careful attention to each and every step from diagnosis and treatment planning. Several implant systems are available , selection of appropriate one is mandatory. The prosthesis fit can be accurate only if a proper impression is made. Thus usage of correct impression technique and material are important.

  • References

    1. contemporary implant dentistry , Carl E. Misch

    2. Implants in dentistry , Michael,John and Luis.

    3. Implant prosthodontics Stevens & freidrickson

    4. Dental implants- Fundamental & advanced laboratory

    technology , Robert Winkleman &Kenneth orth.

  • References contd

    5. Philips science of dental materials

    6. Contemporary fixed prosthodontics, Rosentiel

    7. Principles & practice of implant dentistry, Weiss

    8. Theory & practice of ossteointegration, Hobo

    9. Carr AB. Int J Oral Maxillofac Implants. 1991;6(4):448-55

    10. Assif etal. Int J Oral Maxillofac Implants. 1999;14(6):885-88

    11. Loos Larry G. J Prosthet Dent 1986;55:232-42

    12. Rasmussen Eric J. J Prosthet Dent. 1987;57:198-203

    13. Tautin Francis S. J Prosthet Dent. 1985;54:250-51

    14. Vigolo etal. J Proshtet Dent. 2000;83:562-66

  • Thank you

    Thank you

    For more details please visit