Subject. Currently, tooth loss prosthetics using implants are widely used. An important problem is the loss of bone tissue due to infections around the implant. Micro-gaps at the implant-abutment interface can contribute to infection with microorganisms.The aim of this study was to investigate the precision of connecting the implant-abutment components with simultaneous loading and temporary restoration. Methodology. The precision of the "implant – abutment – artificial crown" connection was studied on a clinical case with simultaneous removal of a tooth root, followed by implant placement and temporary restoration. Before installing the implant, specialized programs combined a three-dimensional CT model of the jaw with a 3D model of the dentition obtained as a result of scanning. To study precision, a duplicate plastic crown was made according to this virtual plan and fixed in a similar implant. The "implant-crown" model was fixed in plaster and a section was made up to the level of the "implant-abutment-artificial crown" connection, which was studied using electron microscopy at magnification of 50, 100 and 200 times. Results. Electron microscopy data showed that the junction of the internal surface of the implant with the plastic "abutment" had a gap width in the range of 54-77 microns. Conclusion. The exact fit of the restoration on the implant was confirmed by electron microscopy. In the presented example, due to the production of temporary restoration, it was possible to reduce the number of manipulations with the implant-abutment components. Modern milling and 3D printing technologies show high precision.
implantation, immediate loading, implant template, precision, electron microscopy
1. Adell R., Lekholm U., Rockler B. et al. Marginal tissue reactions at osseointegrated titanium fixtures (I). A 3 year longitudinal prospective study // Int J Oral Maxillofac Surg. – 1986; 15 (1): 39-52.
2. Albrektsson T., Zarb G., Worthington P., Eriksson A. R. The long term efficacy of currently used dental implants: a review and proposed criteria of success // Int J Oral Maxillofac Implants. – 1986; 1 (1): 11-25.
3. Brånemark P. I., Svensson B., van Steenberghe D. Ten year survival rates of fixed prostheses on four or six implants ad modum Brånemark in full edentulism // Clin Oral Implants Res. – 1995; 6 (4): 227-231.
4. Lindhe J., Meyle J. Group D of European Workshop on Periodontology. Perimplant diseases: consensus Report of the Sixth European Workshop on Periodontology // J Clin Periodontol. – 2008; 35 (8 Suppl): 282-285.
5. Papaspyridakos P., Chen C. J., Singh M., Weber H. P., Gallucci G. O. Success criteria in implant dentistry: a systematic review // J Dent Res. – 2012; 91 (3): 242-248.
6. Callan D. P., Cobb C. M., Williams K. B. DNA probe identification of bacteria colonizing internal surfaces of the implant- abutment interface: a preliminary study // J Periodontol. – 2005; 76 (1): 115-120.
7. Quirynen M., van Steenberghe D. Bacterial colonization of the internal part of two stage implants. An in vivo study // Clin Oral Implants Res. – 1993; 4 (3): 158-161.
8. Piatelli A., Vrespa G., Petrone G., Iezzi G., Annibali S., Scarano A. The role of the microgap between implant and abutment: a retrospective histologic evaluation in monkey // J Periodontol. – 2003; 74 (3): 346-352.
9. Tesmer M., Wallet S., Koutouzis T., Lundgren T. Bacterial colonization of the dental implant fixture-abutment interface: an in vitro study // Journal of Periodontology. – 2009; 80 (12): 1991-1997.
10. Merz B. R., Hunenbart S., Belser U. C. Mechanics of the implant-abutment connection: an 8-degree taper compared to a butt joint connection // International Journal of Oral & Maxillofacial Implants. – 2000; 15 (4): 519-526.
11. Ricomini Filho A. P., Fernandes F. S., Straioto F. G., da Silva W. J., Del Bel Cury A. A. Preload loss and bacterial penetration on different implant-abutment connection systems // Brazilian Dental Journal. – 2010; 21 (2): 123-129.
12. Assenza B., Tripodi D., Scarano A., Perrotti V., Piattelli A., Iezzi G., D'Ercole S. Bacterial Leakage in Implants With Different Implant-Abutment Connections: An In Vitro Study // Journal of Periodontology. – 2011.
13. Hermann J. S., Schoolfield J. D., Schenk R. K., Buser D., Cochran D. L. Influence of the size of the microgap on crestal bone changes around titanium implants. A histometric evaluation of unloaded nonsubmerged implants in the canine mandible // J Periodontol. – 2001; 72 (10): 1372-1383.
14. Kim S. Y., Shin Y. S., Jung H. D., Hwang C. J., Baik H. S., Cha J. Y. Precision and trueness of dental models manufactured with different 3-dimensional printing techniques // Am. J. Orthod. Dentofac. Orthop. – 2018; 153: 144-153.
15. Kelvin Khng K. Y., Ettinger R. L., Armstrong S. R., Lindquist T., Gratton D. G., Qian F. In vitro evaluation of the marginal integrity of CAD/CAM interim crowns // J. Prosthet. Dent. – 2016; 115: 617-623.
16. Abrahamsson L., Bergiundh T., Wennstrflm J., CSL Lindhe J. The peri-impiant hard and soft tissues at different implant systems, A comparative study in the dog // Ctinicat Oral Impiants Researeh. – 1996; 1: 212-219.
17. Berglundh T., Lindhe J. Dimension of the peri-implant mucosa. Biological width revisited // Journal of Clinical Periodontology. – 1996; 23: 971-973.
18. Buser D., Weber H. P., Donath K., Fiorellini J. P., Paquette D. W., Williams R. C., Abrahamsson et at. Soft tissue reactions to tion-submerged unoaded titanium impiants in beagie dogs // Journal of Periodontolog. – 1992; 63: 226-236.
19. Zholudev S. E., Zholudev D. S., Nersesyan P. M. Ispol'zovanie individual'nogo abatmenta avtorskoy konstrukcii kak formirovatelya desny pri implantacii s nemedlennoy nagruzkoy. Problemy stomatologii. 2017; 13; 1: 104-106. [S. E. Zholudev, D. S. Zholudev, P. M. Nersesyan. Use of individual custom-made abutment as gingiva former during immediate load implantation. Actual problems in dentistry. 2017; 13; 1: 104-106. (In Russ.)]. https://www.elibrary.ru/item.asp?id=29256732
20. Sarkisyan K. A,, Strizhakova M. V., Strizhakov V. A. Issledovanie kraevogo prileganiya individual'nogo abatmenta k razlichnym platformam implantatov na sagittal'nom sreze. Problemy stomatologii. 2019; 15; 2: 106-109. [K. A. Sarkisyan, M. V. Strizhakova, V. A. Strizhakov. Investigation of fit of the individual abutment to the various platforms of implants on sagittal section. Actual problems in dentistry. 2019; 15; 2: 106-109. (In Russ.)]. https://www.elibrary.ru/item.asp?id=39165971
21. Sultanov A. A., Pervov Yu. Yu., Yacenko A. K., Sultanova M. A., Nikitan S. G. Strukturnye osobennosti myagkih tkaney, okruzhayuschih implantat, i faktory, vliyayuschie na razvitie vospaleniya v periimplantacionnom prostranstve. Problemy stomatologii. 2019; 15; 2: 11-16. [A. A. Sultanov, Yu. Yu. Pervov, A. K. Yatsenko, M. A. Sultanova, S. G. Nikitan. Structural features of the soft tissues surrounding the implant and factors affecting the development of inflammation in the reimplantal space. Actual problems in dentistry. 2019; 15; 2: 11-16. (In Russ.)]. https://www.elibrary.ru/item.asp?id=39165956