Occlusal Caries Clinical Trial
Official title:
Evaluation of Clinical Performance of 3D Printed Polyether Ether Ketone (PEEK) Inlays Compared With Milled Indirect PEEK Inlays Versus Indirect Resin Composite Inlays Over One Year Period of Time (A Randomized Clinical Trial)
In patients using Inlay restorations will the use of 3D printed PEEK material and technique have superior clinical performance to milled PEEK one or to milled composite resin inlays, evaluation of restorations will be done at baseline, six months and 12 months using the modified US Public Health Service (USPHS) evaluation system
The study will be conducted in Conservative Dentistry Department, Faculty of Dentistry, Cairo
University; The operator in charge will be Donia Mamdouh Elshafey Patients will be selected
from the outpatient clinic of the department Conservative Dentistry Department, Faculty of
Dentistry, Cairo University All cavity preparations will be performed with fine inlay burs
according to inlay cavity principles. The walls facing each other will be prepared 5 to 6
degree divergent with 80 μm diamond burs and were finished with 25 μm diamond burs. All
internal angles will be rounded and all edges will terminate in the enamel. The pulpal floor
will be prepared at a depth of at least 1.5 mm. The teeth will be discarded if isthmus width
was more than 2/3 of the distance between the tubercule tips, or if the walls are thinner
than 2 mm before the preparation or thinner than 1.5 mm after the preparation. The caries
affected dentin tissue at the cavity floor will be left. The teeth will be discarded from
study if the pulp is exposed. To eliminate irregular areas in the cavities, a liner will be
applied as a blockout material. Then the operator will adhere strictly to the manufacturer's
instructions in the imaging, computer design and machining of the restorations either 3D
printing or milling procedure.
The prepared teeth for the indirect restorations will be scanned with an optical 3D camera
(CEREC Omnicam, Dentsply Sirona, Bensheim, Germany), inlays will be designed by a CAD
software (CEREC SW 4.6.1, Dentsply Sirona), and files will be created in STL format (inLab
CAD SW 18.1, Dentsply Sirona) then inlays will additively manufactured After the printing
process is finished, the inlays will be immediately removed from the building platform and
cooled down at room temperature. The inlay will be adapted individually to its cavity, and
the occlusal surface will be recontoured. Such post processing also will be performed on the
milled inlays. After all inlays are adequately adapted, they will be adhesively inserted into
the cavities.
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