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10 prosthetic section DENTAL TECHNOLOGY, OCTOBER-DECEMBER 2024

DIGITAL SOLUTION FOR A PROSTHESIS ON A BAR

LUCIO CARRARO AND DR. SILVIO DE SIMONE

The patient, a male of 67 years old, comes to the clinical attention perfect control of the available spaces and the correct location and
with a circular fixed prosthesis with periodontitis. The clinician, Dr. the type of attachments to be positioned (Figures 9, 10, 11). As
Silvio De Simone decided to proceed with the extraction and the mentioned, two OT Cap threaded spherical attachments were posi-
subsequent insertion of six implants. tioned in the anterior region and, in the posterior region two OT
At our laboratory Venti 07, Venice, Italy, we opted for a removable Equator threaded low profile attachments were considered to be the
denture with a two degrees milled bar with threaded attachments most suitable for the project (Figures 18 to 20).
screwed into the bar. In the incisors region we placed two spherical It is then produced in a laser melting bar, in which will be bond-
attachments with a head of 2.5 mm and in the posterior region, hav- ed the threaded sleeves for the threaded spherical attachments. The
ing less space, we opted for two OT Equator attachments with a low production of the super structure is performed in the chrome cobalt
profile. with the conventional lost cast technique (Figure 14).
The case study began in the laboratory starting from a total tem- The last steps are the mounting of the teeth (Figure 15) the cur-
porary prosthesis relined several times; this will be the starting point ing of the resin and the insertion of the denture in the mouth (Figure
for all the work. After taking the impression and after the passiva- 16, 17). The aesthetic results of the prosthesis are excellent. After one
tion of the bar, a control on the master model is performed (Figure month, a check is done and the patient claims to be extremely satis-
1). At this stage, we started the digital design of the two bars fied. The stability achieved is excellent and the daily hygiene of the
(Figures 2 to 11) with the Dental Wings software. As a reference, prosthesis is easily manageable. In contrast with the old prosthesis, the
we use the temporary prosthesis and this allows the operator the new one has no palate hence, providing more comfort to the patient.

FIG 1: Master Model FIG 2: Digital Master

FIG 3: Digital Master without gums FIG 4: Digital Master occlusal view