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Journal of Prosthetic Dentistry

A universal torque wrench system

  • Michael D. Scherer
    Correspondence
    Corresponding author: Dr Michael D. Scherer, 1001 Shadow Lane, MS 7415, Bldg. A, Suite 204-K, Las Vegas, Nevada 89106-4124
    Affiliations
    Associate Professor, Department of Clinical Sciences, School of Dental Medicine, University of Nevada Las Vegas, School of Dental Medicine, University of Nevada, Las Vegas, Nev
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  • Edwin A. McGlumphy
    Affiliations
    Professor, Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio, College of Dentistry, The Ohio State University, Columbus, Ohio
    Search for articles by this author
      Dental implant manufacturers supply various forms of torque limiting devices for use with implant restorations. A clinician may use these instruments to ensure adequate torque delivery with appropriate precision.
      • McGlumphy EA
      • Mendel DA
      • Holloway JA
      Implant screw mechanics.
      • Standlee JP
      • Caputo AA
      • Chwu MY
      • Sun TT
      Accuracy of mechanical torque-limiting devices for implants.
      • Tan KB
      • Nicholls JI
      Implant-abutment screw joint preload of 7 hex-top abutment systems.
      • Haack JE
      • Sakaguchi RL
      • Sun T
      • Coffey JP
      Elongation and preload stress in dental implant abutment screws.
      Throughout the early period of dental implant prosthetics, screw loosening was a major complication,
      • Haack JE
      • Sakaguchi RL
      • Sun T
      • Coffey JP
      Elongation and preload stress in dental implant abutment screws.
      • Jemt T
      • Pettersson P
      A 3-year follow-up study on single implant treatment.
      • Ekfeldt A
      • Carlsson GE
      • Börjesson G
      Clinical evaluation of single-tooth restorations supported by osseointegrated implants: a retrospective study.
      • Engquist B
      • Nilson H
      • Astrand P
      Single-tooth replacement by osseointegrated Brånemark implants. A retrospective study of 82 implants.
      • Henry PJ
      • Laney WR
      • Jemt T
      • Harris D
      • Krogh PH
      • Polizzi G
      • et al.
      Osseointegrated implants for single-tooth replacement: a prospective 5-year multicenter study.
      but a later study found that while screw loosening remained a potential prosthetic complication, it was less common than the early studies suggested.
      • Goodacre CJ
      • Bernal G
      • Rungcharassaeng K
      • Kan JY
      Clinical complications with implants and implant prostheses.
      Nevertheless, inadequate tightening with insufficient torque has been cited as a possible reason for screw loosening.
      • Jörneus L
      • Jemt T
      • Carlsson L
      Loads and designs of screw joints for single crowns supported by osseointegated implants.
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      References

        • McGlumphy EA
        • Mendel DA
        • Holloway JA
        Implant screw mechanics.
        Dent Clin North Am. 1998; 42: 71-89
        • Standlee JP
        • Caputo AA
        • Chwu MY
        • Sun TT
        Accuracy of mechanical torque-limiting devices for implants.
        Int J Oral Maxillofac Implants. 2002; 17: 220-224
        • Tan KB
        • Nicholls JI
        Implant-abutment screw joint preload of 7 hex-top abutment systems.
        Int J Oral Maxillofac Implants. 2001; 16: 367-377
        • Haack JE
        • Sakaguchi RL
        • Sun T
        • Coffey JP
        Elongation and preload stress in dental implant abutment screws.
        Int J Oral Maxillofac Implants. 1995; 10: 529-536
        • Jemt T
        • Pettersson P
        A 3-year follow-up study on single implant treatment.
        J Dent. 1993; 21: 203-208
        • Ekfeldt A
        • Carlsson GE
        • Börjesson G
        Clinical evaluation of single-tooth restorations supported by osseointegrated implants: a retrospective study.
        Int J Oral Maxillofac Implants. 1994; 9: 179-183
        • Engquist B
        • Nilson H
        • Astrand P
        Single-tooth replacement by osseointegrated Brånemark implants. A retrospective study of 82 implants.
        Clin Oral Implants Res. 1995; 6: 238-245
        • Henry PJ
        • Laney WR
        • Jemt T
        • Harris D
        • Krogh PH
        • Polizzi G
        • et al.
        Osseointegrated implants for single-tooth replacement: a prospective 5-year multicenter study.
        Int J Oral Maxillofac Implants. 1996; 11: 450-455
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        • Bernal G
        • Rungcharassaeng K
        • Kan JY
        Clinical complications with implants and implant prostheses.
        J Prosthet Dent. 2003; 90: 121-132
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        • Jemt T
        • Carlsson L
        Loads and designs of screw joints for single crowns supported by osseointegated implants.
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        Accuracy of friction-style and spring-style mechanical torque limiting devices for dental implants.
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        Adapting the ITI torque driver for use with other implant systems.
        J Prosthet Dent. 1999; 81: 732