Evaluation of Dental Implant Stability Regarding All-on-4 Concept Utilizing Two Different Angles

Abstract

Background: The “All-on-4” technique using 4 implants that has gained popularity in full arch edentulismcases in recent years was presented as a modern technique in implant-denture rehabilitation by Malo inLisbon, Portugal, for the first time in 2003 and the all-on-four concept that began to be used in atrophic fullarch mandibular and in the maxilla in 2005 has emerged.Aim: evaluation of dental implant stability in relation to All-on-4 concept.Materials and Methods: This was a clinical prospective comparative study organized from February 2019to March 2020 in the College of Dentistry Teaching Hospital, Department of Oral & Maxillofacial Surgery/Dental Implant Unit/University of Baghdad. A total of 15 Iraqi patients aged 41-73 years, 9 males & 6females were enrolled in this study receiving 80 Dental implants (All-on-4 concept). Patients classified intotwo groups, group A (All-on-4 with 2 anterior axial and 2 posterior with angulation of 17°) and group B(All-on-4 with 2 anterior axial and 2 posterior with angulation of 30°). For both, the surgical site of dentalimplant was examined for the hard and soft tissues clinically and radiographically utilizing OPG and CBCT.Results: The mean of ISQ values obtained in this study at each time point in the total dental implant,axially placed and angled implant stability demonstrated significant increase (P = 0.000, 0.031 and 0.004)respectively at different times. There was a significant increase in the mean stability of axial and angledimplants concerning males (P = 0.001 and P =0.002) respectively than females. Significant correlationbetween implant stability and the regions at the three times periods. There was a significant difference inangled implants stability between different intervals (P = 0.001) in patients >50y. Success of dental implants95.24%.Conclusion: All-on-4–style full-arch dental implant procedures have one of the highest success rates ofdental treatment; the dental implant stability had significant effect in mandible in comparison to maxilla.There was irrelevant clinical analysis result in comparison to the statical analysis in relation to stability withdifferent variables.