Page 14 - DT Vol 15 No 3

14 I implantology DENTAL TECHNOLOGY, JULY-SEPTEMBER 2025

Fig 20a Fig 20b Fig 20c Fig 20d

Fig 20e Fig 20f Fig 20g Fig 20h
Fig 20a-h: Milling of the final prosthesis done in multilayered zirconia

Fig 21a-b: The final prosthesis screwed over the multi-unit abutments using tie-bases

time while facilitating effective implant placement in accordance with the
proper prosthetic position. Compared to cement-retained constructions,
screw-retained prostheses provide advantages such as absence of cement
in the vicinity of peri-implant tissues and the potential for maintenance
services (construction monitoring, unscrewing, professional hygiene
treatments, etc.). The multi-unit abutments offer passivity of fit of the
prosthesis and also help in sealing the implant neck and forming a wider
hemidesmosomal connection. However, this kind of digital workflow is
still in its infancy and therefore requires larger primary studies with greater
sample size and longer follow-up periods to support the evidence of our
current case. n

REFERENCES
1) R. Adell, B. Eriksson, U. Lekholm, P. I. Brånemark, and T. Jemt, “Long-
Fig 22: Intraoral image of the final prosthesis term follow-up study of osseointegrated implants in the treatment of
totally edentulous jaws,” The International Journal of Oral & Maxillofacial
In this clinical instance, CBCT imaging performed 3 years after prosthesis Implants, vol. 5, no. 4, pp. 347–359, 1990.
delivery reveals stable bone levels surrounding dental implants without any 2.) P. I. Branemark, B. Svensson, and D. vanSteenberghe, “Ten-year survival
remodeling of the bone around the implants. rates of fixed prostheses on four or six implants ad modumBranemark in
Thus, multi-unit abutments can be installed intraoperatively at the time of full edentulism,” Clinical Oral Implants Research
implant placement itself, sealing the implant neck and forming a wider and 3) S. U. Rajgiri and M. Dayalan, “Full-mouth.Rehabilitation with implant-
stronger hemidesmosomal attachment at the multi-unit abutment neck level. supported fixed prosthesis,” International Journal of OralImplantology
All manipulations for replacing the prosthesis from temporary to permanent & Clinical Research, vol. 7, no. 3, pp.73– 80, 2016.
were made at the multi-unit level, which is a higher level than the peri- 4. G. A. Zarb, J. Hobkirk, S. Eckert, and R. Jacob,Prosthodontic Treatment
implant bone surface. This made it possible to preserve hemidesmosomal for Edentulous Patients: Complete Dentures and Implant-Supported
connections and avoid multiple screwing and unscrewing, thus preventing Prostheses, Elsevier Health Sciences, Missouri, 13th ed. edition, 2013
bone loss. 5. V. F. Rojas, “Retrospective 2- to 7-year follow-up study of 20 double
Virtual-guided technologies decrease intraoperative stress and procedure full-arch implant-supported monolithic zirconia fixed prostheses: