Different studies have proposed the use of zirconia abutments to improve the aesthetic outcomes in the anterior sextant, however the results have been inconclusive. A tendency towards a better aesthetic result with the use of zirconia instead of titanium abutments was observed, although more technical complications were also recorded.The use of zirconia abutments in the anterior maxillary region showed a tendency towards better matching, although differences were not significant. In addition, with these abutments more technical complications were observed, what increased the cost and time. More studies with larger samples and longer observations periods are needed to recommend the use of zirconia abutments for this clinical situation
The purpose of the present study was to evaluate the clinical and aesthetic outcomes of single tooth implant restorations, where different abutment materials were used (zirconia vs titanium) associated with metal-ceramic crowns. The evaluation was carried out by means of an aesthetic composite index combined with patient evaluation
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
24
Siena University, Department of Periodontology, Policlinico Le Scotte Siena.
Siena, Siena, Italy
Tuscan School of Dentistry
Siena, Siena, Italy
change from baseline in the anatomic form and surface characteristics of the peri implant mucosa
the following parameters were assessed by means of standardized photographs: contour of the labial surface of the mucosa and its colour; when compared to the adjacent teeth , penalty points were assigned ( 0 = excellent; 1 or 2 = satisfactory; 3 or 4 = moderate; 5 ore more, poor).
Time frame: one month and one year after the placement of the definitive crowns
change from baseline in crestal bone levels
in standardized intraoral radiographs the the following measurements were carried out : vertical distance from implant shoulder to the most coronal bone in contact with the implant at mesial and distal site; horizontal distance from the implant shoulder to the adjacent teeth at mesial and distal sites; vertical distance ( parallel to the implant long axis) from the contact point to the bone crest at mesial and distal sides
Time frame: one month and one year after placing the definitive crown
change from baseline in interdental soft tissue position
position of interdental papilla measured by means of Papilla Index ( Jemt, 1997)
Time frame: one month and one year after the placement of the definitive crowns
change from baseline in thickness of the peri implant mucosa
the thickness was measured by placing a calibrated endodontic file 2mm apical to the mucosal margin
Time frame: one month and one year after the placement of the definitive crowns
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