“Comparing Two Suggested Techniques To Correct Improperly Angulated Implants In Mandibular Kennedy Class I Implant Supported Partial Overdenture”

Abstract

Educational mandibular stone model Kennedy Class-I was used for this study. A scan of the cast was done via CBCT and a printed 3D model was produced with the osteotomies bilateral, on the right side the implant was tilted with 7-degree angulation and on the left side the implant was straight. And spaces for the strain gauge slots were designed and prepared on the printed casts buccally and distally to the implants on both sides. Two models were used to correct the angulation by two techniques on the 1st model a spheroflex attachments were used on both sides and on the 2nd model an angulated abutment was used on the right side to correct the angulation and a straight abutment on the left side. Same design of the implant supported partial overdenture was chosen for both models and the dentures were constructed and a pick-up was done on both models using soft liner. Strain gauge was attached to each side distally and buccally to the implant and the load was applied bilaterally on the central fossa of the 1st molar. The results obtained from this study revealed higher stresses transmitted to pre-tilted implant more than the straight implant. The stresses transmitted to the implant using angulated abutment was significantly higher than the stresses transmitted using the spheroflex attachment in the angulated implant. Also in the straight implant the stresses transmitted to the implant using straight abutment was higher than the stresses transmitted to the implant using spheroflex attachment.