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http://dx.doi.org/10.4047/jkap.2011.49.3.197

A study on accuracy and application of the implant torque controller used in dental clinic  

Joo, Young-Hun (Department of Prosthodontics, College of Dentistry, Wonkwang University)
Lee, Jin-Han (Department of Prosthodontics, College of Dentistry, Wonkwang University)
Publication Information
The Journal of Korean Academy of Prosthodontics / v.49, no.3, 2011 , pp. 197-205 More about this Journal
Abstract
Purpose: This study was to evaluate the accuracy of the implant torque controller used in dental clinics and to investigate whether it was applied appropriately. Materials and methods: Fifty dentists who work in dental clinics were enrolled in this study. Dental (implant) practice career, experience frequency of implant screw loosening and fracture, education of implant torque controller application and infection control methods were included in the survey. 25 Ncm and 30 Ncm of the tightening torque applied to the implant screw were measured by 50 clinicians. After measuring the torque value by using the torque controller, the torque mean according to where education about the implant torque controller was received was analyzed with independent t-test at the significance level of 0.05. Results: The torque controller used in private dental clinics showed 4.78% error ratio. When 50 dentists applied 25 Ncm to the implant screw was $29.0{\pm}8.4$ Ncm, and that in 30 Ncm was $34.3{\pm}9.1$ Ncm. Statistical significance was found between the group that was educated about implant torque application and the group that was not educated. Conclusion: During the prosthodontic treatment with implant, there was difference between actual applied torsion force and the amount torque controller indicated. Clinicians have to not only be well-informed about the accurate usage method of the torque controller, but also keep and manage the torque controller so as to maintain continuous and accurate torque values. Through this, it is considered to achieve clinical results to minimize problems of screw loosening or fracture.
Keywords
Implant torque controller; Screw loosening; Abutment screw;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 Jang JK, Kim HJ, Chung Ch. Detorque force and surface change of coated abutment screw after repeated closing and opening. J Korean Acad Prosthodont 2008;46:500-10.   DOI
2 Burguete RL, Johns RB, King T, Patterson EA. Tightening characteristics for screwed joints in osseointegrated dental implants. J Prosthet Dent 1994;71:592-9.   DOI   ScienceOn
3 Jorneus L, Jemt T, Carlsson L. Loads and designs of screw joints for single crowns supported by osseointegrated implants. Int J Oral Maxillofac Implants 1992;7:353-9.
4 Dellinges M, Curtis D. Effects of infection control procedures on the accuracy of a new mechanical torque wrench system for implant restorations. J Prosthet Dent 1996;75:93-8.   DOI   ScienceOn
5 Cehreli MC, Akca K, Tonuk E. Accuracy of a manual torque application device for morse-taper implants: a technical note. Int J Oral Maxillofac Implants 2004;19:743-8.
6 Jaarda MJ, Razzoog ME, Gratton DG. Providing optimum torque to implant prostheses: a pilot study. Implant Dent 1993;2:50-2.   DOI   ScienceOn
7 McGlumphy EA, Elfers CL, Mendel DA. A comparison of torsional ductile fracture in implant coronal screws [abstract]. J Dent Res 1992;71:114.
8 Choi JH, Yang JH, Cho WP, Lee JB. The influence of abutment screw length and repeated tightening on screw loosening in dental implant. J Korean Acad Prosthodont 2006;44:432-42.
9 Patterson EA, Johns RB. Theoretical analysis of the fatigue life of fixture screws in osseointegrated dental implants. Int J Oral Maxillofac Implants 1992;7:26-33.
10 Weinberg LA, Kruger B. A comparison of implant/prosthesis loading with four clinical variables. Int J Prosthodont 1995;8:421-33.
11 Shin HM, Jeong CM, Jeon YC, Yun MJ, Yoon JH. Influence of tightening torque on implant-abutment screw joint stability. J Korean Acad Prosthodont 2008;46:396-408.
12 Haack JE, Sakaguchi RL, Sun T, Coffey JP. Elongation and preload stress in dental implant abutment screws. Int J Oral Maxillofac Implants 1995;10:529-36.
13 McGlumphy EA, Mendel DA, Holloway JA. Implant screw mechanics. Dent Clin North Am 1998;42:71-89.
14 Tan KB, Nicholls JI. Implant-abutment screw joint preload of 7 hextop abutment systems. Int J Oral Maxillofac Implants 2001;16:367-77.
15 Rangert BR, Sullivan RM, Jemt TM. Load factor control for implants in the posterior partially edentulous segment. Int J Oral Maxillofac Implants 1997;12:360-70.
16 Lazzara RJ. Criteria for implant selection: surgical and prosthetic considerations. Pract Periodontics Aesthet Dent 1994;6:55-62.
17 Jemt T, Pettersson P. A 3-year follow-up study on single implant treatment. J Dent 1993;21:203-8.   DOI   ScienceOn
18 Goodacre CJ, Bernal G, Rungcharassaeng K, Kan JY. Clinical complications with implants and implant prostheses. J Prosthet Dent 2003;90:121-32.   DOI   ScienceOn
19 Cavazos E, Bell FA. Preventing loosening of implant abutment screws. J Prosthet Dent 1996;75:566-9.   DOI   ScienceOn
20 Binon P. Screw joints, components, and other intimate relationships. J Prosthet Dent 1994;72:625.
21 Jaarda MJ, Razzoog ME, Gratton DG. Effect of preload torque on the ultimate tensile strength of implant prosthetic retaining screws. Implant Dent 1994;3:17-21.   DOI   ScienceOn
22 Kim DG, Park CJ, Cho LR. Comparison of accuracy of implant torque controllers. J Korean Acad Stomatognathic Func Occl 2008;24:157-68.
23 Gutierrez J, Nicholls JI, Libman WJ, Butson TJ. Accuracy of the implant torque wrench following time in clinical service. Int J Prosthodont 1997;10:562-7.
24 Khraisat A, Hashimoto A, Nomura S, Miyakawa O. Effect of lateral cyclic loading on abutment screw loosening of an external hexagon implant system. J Prosthet Dent 2004;91:326-34.   DOI   ScienceOn
25 Breeding LC, Dixon DL, Nelson EW, Tietge JD. Torque required to loosen single-tooth implant abutment screws before and after simulated function. Int J Prosthodont 1993;6:435-9.