Effect of surgical drill guide and irrigans temperature on thermal bone changes during drilling implant sites - thermographic analysis on bovine ribs

Author:

Markovic Aleksa1ORCID,Lazic Zoran2,Misic Tijana1,Scepanovic Miodrag3,Todorovic Aleksandar3,Thakare Kaustubh1,Janjic Bojan1,Vlahovic Zoran4,Glisic Mirko3

Affiliation:

1. Faculty of Dentistry, Clinic of Oral Surgery, Belgrade

2. Military Medical Academy, Clinic of Dentistry, Belgrade + University of Defence, Faculty of Medicine of the Military Medical Academy, Berlgrade

3. Faculty of Dentistry, Clinic of Prosthodontics, Belgrade

4. nema

Abstract

Background/Aim. During drilling implant sites, mechanical energy is converted into thermal one resulting in transient rise in temperature of surrounding bone. The temperature of 47?C exeeding one minute impairs osseointegration, compromises mechanical properties of the local bone and could cause early implant failure. This in vitro study aimed to assess the effect of surgical drill guide and temperature of irrigans on thermal changes of the local bone during drilling implant sites, and to test the influence of irrigans temperature on the temperature of surgical drill guide. Methods. A total of 48 specimens obtained from bovine ribs were randomly allocated to four experimental conditions according to the 2 x 2 factorial design: drill guide (with or without) and saline (at 25?C or 5?C). Real-time infrared thermography was used as a method for temperature measurement. The primary outcome was bone temperature change during drilling implant sites measured at 3 osteotomy depths, whereas the second one was change in the temperature of the drill guide. Data were analyzed by Brunner and Langer nonparametric analysis and Wilcoxon test. Results. The effect of drill guide on the changes of bone temperature was significant at the entrance of osteotomy, whereas the effect of saline temperature was significant at all osteotomy levels (p < 0.001). No significant interaction was found (p > 0.05). Guided surgery and irrigation with saline at 25?C were associated with the highest bone temperature increase. Increase in drill guide temperature was significantly higher when saline at 25?C was used (p < 0.001). Conclusion. Guided implant site preparation generates higher temperature of the local bone than conventional drilling, not exceeding the threshold for thermal bone necrosis. Although saline at room temperature provides sufficient heat control during drilling, cooled saline is more effective regardless the use of surgical drill guide.

Publisher

National Library of Serbia

Subject

Pharmacology (medical),General Medicine

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