Abstract
BackgroundThis study aimed to evaluate the effect of the implant design and the presence of cortical bone in the primary stability, as well as analyze the differences between the stability measurements obtained by two different resonance frequency analysis (RFA) devices. Material and MethodsA total of 80 Klockner implants of two different models [40 Essential Cone implants (group A) and 40 Vega implants (group B)] were used. The implants were placed in two polyurethane blocks that simulated the mechanical properties of the maxillary bone. One block featured a layer of cortical bone that was absent from the other block. The primary stability of all implants was measured by insertion torque and RFA using two different devices: Penguin RFA and Osstell IDX. ResultsPrimary stability was superior in the cortical bone in both torque and RFA. In the block containing cortical bone, group A implants obtained a greater insertion torque than did group B. The insertion torque was lesser in the bone lacking cortex. Regarding the ISQ of the implants, group A presented higher values in the block with cortical bone, but the values were lower in the block without cortical bone. There were no significant differences between the values obtained from the Osstell IDX and Penguin RFA. ConclusionsThe presence of cortical bone positively influences the primary stability of dental implants. The design of the implant also has a statistically significant influence on implant primary stability, although the impact depends on whether there is coronal cerclage or not. There were no statistically significant differences in the implant stability measurements obtained by two different devices. Key words:Implant stability, resonance frequency analysis, torque, osstell, penguin, cortical.
Highlights
Implant stability has been defined as the absence of clinical mobility under a given load, and it is considered one of the main requirements for the achievement and maintenance of the osseointegration of a dental implant [1,2]
The strength of the relationships between variables was studied using the Pearson correlation coefficient. The results of this in vitro experimental study revealed that the primary stability of each implant was significantly higher in the block that simulated the presence of cortical bone than in that with only trabecular bone
Regarding torque and resonance frequency analysis (RFA) note that there was a strong correlation between the implant stability quotient value (ISQ) values obtained using the different devices (Osstell or Penguin) and the different add-ons (Multipeg or Smartpeg), with all of these correlations being above 0.95, while the correlation values of the torque with the ISQ variables ranged between 0.81 and 0.87 (Table 3)
Summary
Implant stability has been defined as the absence of clinical mobility under a given load, and it is considered one of the main requirements for the achievement and maintenance of the osseointegration of a dental implant [1,2]. The method uses an electronic device with a punch that pushes the tooth and measures its lateral displacement, delivering objective stability values on a scale from -8 to +50 [23,24,25] As this method was developed to measure tooth mobility, it presents insufficient sensitivity to measure micromotion in implants, since teeth, being surrounded by the periodontal ligament, present significantly greater mobility than do implants [26,27,28]. Another non-invasive method is measurement of the insertion torque, which is widely referenced in the literature and currently very widespread clinically [13,29]. There were no statistically significant differences in the implant stability measurements obtained by two different devices
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
