Stomatologist № 2 (33) – 2019, pp. 32-40                                                                                                                    SCIENTIFIC PUBLICATION

Experimental evaluation of the strength characteristics of screw fixation of orthopedic components to dental implants with a planar type of connection

S.P. Rubnikovicha, S.V. Pryalkinb, V.N. Buscoc

aMD, PhD, DMSci, Professor, Belarusian Medical Academy of Postgraduate Education, Minsk, Belarus
bBelarusian Medical Academy of Postgraduate Education, Minsk, Belarus
cPhDTechn., Associate Professor, Institute of Applied Physics of the National Academy of Sciences of Belarus, Minsk, Belarus

https://doi.org/10.32993/stomatologist.2019.2(33).3

ABSTRACT
The article presents the results of the study of the strength characteristics of screw fixation of orthopedic components to dental implants with a planar type of connection.
The aim of the study. To study in the experiment the strength characteristics of screw fixation of orthopedic components to dental implants with a planar type of connection under cyclic loading conditions simulating functional loads in the oral cavity.
Objects and methods. An experimental study of the connection in the dental implant-abutment system was carried out in a laboratory setup at the Institute of Applied Physics of the National Academy of Sciences of Belarus. The principle of operation of the installation is based on the study of the strength characteristics of the tested samples under cyclic mechanical actions. Under experimental conditions, the strength characteristics of screw fixation of orthopedic components to 24 dental implants from Ti-6Al-4V alloy with a diameter of 3.75 mm and a length of 11.5 mm with a planar type of connection were evaluated, which were divided into 4 groups (n = 6) depending on from the angle of loading and force of impact.
Results and discussion. It is established that changes in the system “orthopedic construction – dental implant” take place on the new experimental model after the cyclic impact of the dosed mechanical load. Moreover, the magnitude of the changes is directly dependent on the location of the screw connection, the point of physical impact, the number of loading cycles and the angle of impact of the load. The greatest changes occur with the 2nd and 3rd screw connection due to the close location to the point of application of force.
Conclusions. A new experimental model was developed, manufactured and tested to assess the strength characteristics of the screw fixation of orthopedic components to dental implants. A significant decrease in the connection depth and the degree of clamping of orthopedic screws after experimental loading was revealed, they are most significantly expressed in the 2nd and 3rd screw connections of the experimental model. The expressed correlation dependence (r = 0,73; r = 0.91) with an increase in the angle and number of loading cycles to 200 000, the fatigue accumulation of orthopedic structures increases by 1.78 times.

Keywords: dental implant, cyclic loading, screw fixation strength, orthopedic construction

References 

  1. Bus’ko V.N. Laboratornaja ustanovka dlja issledovanija ustalostnoj povrezhdaemosti ploskih ferromagnitnyh obrazcov [Laboratory setup for the study
    of fatigue damage of flat ferromagnetic samples]. Pribory i tehnika jeksperimenta. –Instruments and Experimental Technique. 2011, no. 1, pp. 165–167.
  2. Dedova L.N., Rubnikovich S.P., Denisova Ju.L., Kandrukevich O.V., Solomevich A.S., Rosenik N.I. Rasprostranennost’ stomatologicheskih zabolevanij v Respublike Belarus’ [The prevalence of dental diseases in the Republic of Belarus]. Stomatologija. Jestetika. Innovacii. – Dentistry. Aesthetics. Innovation. 2017, no. 2, pp. 193–202.
  3. Rubnikovich S.P. Lechenie pacientov s polnoj adentiej verhnej cheljusti s#emnymiprotezami s oporoj na dental’nye implantaty [Treatment of patients with full edentulous upper jaw with removable prostheses based on dental implants]. Stomatolog. Minsk. –Stomatologist. Minsk. 2015, no. 3, 29 p.
  4. Rubnikovich S.P., Fisjunov A.D., Bus’ko V.N. Metodika ustalostnyh ispytanij kompozitno-armirovannyh kul’tevyh shtiftovyh vkladok s raznym kolichestvom armirujushhih jelementov [Methods of fatigue testing of composite-reinforced stump pin tabs with a different number of reinforcing elements]. Stomatolog. Minsk. – Stomatologist. Minsk. 2017, no. 2 (25), pp. 14–18.
  5. Rubnikovich S.P., Denisova Ju.L., Shishov V.G., Raptunovich Ju.A. Osobennosti dental’noj implantacii v mezhdisciplinarnom vzaimodejstvii pri adentii bokovyh rezcov verhnej cheljusti [Features of dental implantation in interdisciplinary interaction in case of edentulous lateral incisors of the upper jaw].Stomatolog. Minsk. – Stomatologist. Minsk. 2018, no. 1 (28), pp. 25–31.
  6. Rubnikovich S.P., Prjalkin S.V. Ispol’zovanie mezostruktur pri izgotovlenii zubnyh protezov s oporoj na dental’nye implantaty [Use of mesostructures in the manufacture of dental prostheses based on dental implants]. Stomatolog. Minsk –Stomatologist. Minsk. 2016, no. 2 (21), pp. 62–63.
  7. Homich I.S., Rubnikovich S.P. Lechenie pacientov s chastichnoj vtorichnoj adentiej metodom dental’noj implantacii s primeneniem nizkointensivnogo impul’snogo ul’trazvuka [Treatment of patients with partial secondary edentulous with dental implantation method using lowintensity pulsed ultrasound]. Stomatolog. Minsk. – Stomatologist. Minsk. 2015, no. 4, 25 p.
  8. Homich I.S.,RubnikovichS.P., Homich S.F. Dental’naja implantacija i protezirovanie u pacienta s saharnym diabetom [Dental implantation and prosthetics in a patient with diabetes mellitus ]. Stomatolog. Minsk. – Stomatologist. Minsk. 2014, no. 3 (14), pp. 67–69.
  9. Piermatti J., Yousef H., Luke A .[et al.] An in vitro analysis of implant screw torque loss with external hex and internal connection implant systems. Implant Dent. 2006; 15:427–435.
  10. Jung R.E., Pjetursson B.E., Glauser R. [et al.] A systematic review of the 5year survival and complication rates of implantsupported single crowns. Clin Oral Implants Res. 2008; 19:119–130.
  11. Coelho P.G., Sudack P., Suzuki M. [et al.] In vitro evaluation of the implant abutment connection sealing capability of different implant systems. J Oral Rehabil. 2008; 35:917–924.
  12. Coelho A.L., Suzuki M., Dibart S. [et al.] Cross-sectional analysis of the implantabutment interface. J Oral Rehabil. 2007; 34:508–516.
  13. Steinebrunner L., Wolfart S., Bossmann K. [et al.] In vitro evaluation of bacterial leakage along the implant-abutment interface of different implant systems. Int J Oral Maxillofac Implants. 2005; 20:875–881.

Correspondence to:  Е-mail: rubnikovichs@mail.ru