Fig. 4. Implant placement surgery after 4 months of healing (a). Immediate loading of the new implants and the explanation of the implant at the left first molar (b). Panoramic radiograph showing the case finished with 12 months of follow-up (c). Clinical image showing the definitive screw-retained prostheses (d)
Fig. 4. Implant placement surgery after 4 months of healing (a). Immediate...
Fig. 3. Panoramic radiograph showing excessive marginal bone loss affecting all the dental implants in the mandible supporting fixed prostheses (a). Clinical image showing the advanced bone destruction around the implants at the incisors and left premolar regions (b). Clinical image showing the preservation of the pre-existing bone upon implant removal with the counter-torque regions (c). Panor...
Fig. 2. The cause of implant removal
Fig. 2. The cause of implant removal
Fig. 1. Frequency distribution of the location of the explanted dental implant
Fig. 1. Frequency distribution of the location of the explanted dental implant
Patient
Location
Manufacturer
Abutment connection
Type of fracture
Location of the fracture
Category of bone support around the implant (%)
Use of trephine bur
1
25
Unknown
Internal
Complete fracture
Implant body (apical third)
76–100
No
14
Unknown
Internal
Complete fracture
Implant body (apical third)
76–100
Yes
2
15
Nobel
Internal
Fissure line...
Anitua, E., Fernandez-de-Retana, S. & Alkhraisat, M.H. Performance of the counter-torque technique in the explantation of nonmobile dental implants. Int J Implant Dent 6, 1 (2020). https://doi.org/10.1186/s40729-019-0197-z
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Received: 30 July 2019
Accepted: 22 November 2019
Published: 09 January 2020
DOI: https://doi.org/10.1186/s40729-019-0197-z
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This study was performed following the Helsinki Declaration regarding the investigation with human subjects.
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Eduardo Anitua is the Scientific Director of BTI Biotechnology Institute (Vitoria, Spain). He is the head of the Foundation Eduardo Anitua, Vitoria, Spain. Sofia Fernandez-de-Retana and Mohammad H. Alkhraisat are researchers at BTI Biotechnology Institute (Vitoria, Spain).
Clínica Eduardo Anitua, Vitoria, Spain
Eduardo Anitua
BTI Biotechnology Institute, Vitoria, Spain
Eduardo Anitua, Sofia Fernandez-de-Retana & Mohammad H. Alkhraisat
Eduardo Anitua Foundation, C/Jose Maria Cagigal 19, 01007, Vitoria, Spain
Eduardo Anitua
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No funding was received for this study.
Howe M-S, Keys W, Richards D. Long-term (10-year) dental implant survival: a systematic review and sensitivity meta-analysis. J Dent. 2019. https://doi.org/10.1016/j.jdent.2019.03.008.
Buser D, Sennerby L, De Bruyn H. Modern implant dentistry based on osseointegration: 50 years of progress, current trends and open questions. Periodontol 2000. 2017;73(1):7–21. https://doi.org/10.1111/prd.12185.
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The good performance of the counter-torque method, as an atraumatic alternative for nonmobile implant removal, reinforces its use in the clinical practice. However, the technique is not exempt from complications (although at a very low rate).
To our knowledge, this is the study with the largest sample size reporting the performance, in the clinical practice, of the application of counter-torque technique for the removal of nonmobile dental implants. In this retrospective analysis, the counter-torque method demonstrated to be highly predictable, showing a high success rate. The fracture of the implant (0.65% at the implant apical third)...
Table 1 shows the relevant available information regarding the fractured dental implants. Ten dental implant fractures were observed in 7 patients. There were no differences regarding the location of the fractured implants, as 40% were located in the maxilla and 60% were located in posterior areas (Table 1). Postoperative recovery of the patients was uneventful and pain was successfully managed ...
In this report, 749 nonmobile dental implants were explanted in 355 patients. Figure 1 shows the anatomical location of the dental implants. The 50.6% of the removed implants were located in the maxilla and 48.2% of the cases were located in the anterior areas. Attending to the causes of explantation, the vast majority of the explantations occurred due to biological complications (86.2%), followe...
Patients of legal age treated for implant explantation of nonmobile dental implants between March 2010 and December 2018 were included in this retrospective study.
The treatment was performed using an implant removal kit (BTI Biotechnology Institute, Vitoria, Spain) that allowed the application of a counter-torque to the bone-implant interface [4]. The decision to raise a flap or not was made acc...
Although presenting high and acceptable survival rates [1, 2], dental implants fail as a consequence of infection (periimplantitis), excessive biomechanical stress, or improper positioning. Different techniques have been described to remove a failed dental implant that include block resection, buccal bone osteotomy, trephine osteotomy, and piezosurgery [3, 4]. The application of counter-torque to ...
The application of the counter-torque technique has been proposed as a conservative and atraumatic alternative for the explantation of nonmobile dental implants. The objective of this report is to assess the performance of this technique in a large number of patients.
Three hundred and fifty-five patients were treated for the explantation of 749 nonmobile dental implants. The explantations were p...