INFLUENCE OF ABUTMENT DESIGN ON CLINICAL OUTCOME OF IMPLANT-SUPPORTED MONOLITHIC ZIRCONIA CROWNS | ||
| Egyptian Dental Journal | ||
| Article 22, Volume 69, Issue 1 - Serial Number 4, January 2023, Pages 665-673 PDF (532.85 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/edj.2023.174532.2344 | ||
| Authors | ||
| Amira Hammad* 1; Wael Ahmed2; Walid Al-Zordk3; Mohamed Ghazy4; Ahmed Attia4 | ||
| 1Assistant Professor, Prosthodontics Department, Faculty of Dentistry, Kafrelsheikh University, Kafrelsheikh, Egypt | ||
| 2Associate Professor, Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt | ||
| 3Associate Professor, Fixed Prosthodontics Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt | ||
| 4Professor, Fixed Prosthodontics Department, Faculty of Dentistry, Mansoura University, Egypt | ||
| Abstract | ||
| Statement of problem: Longer-term clinical trials with success data are required to validate the current design options of Ti base as viable abutments. Objective: The aim of this clinical research was to investigate the influence of abutment designs on the clinical outcome of screw- and cement-retained, implant-supported monolithic zirconia crowns. Material and methods: A total of 28 patients with missing 30 single maxillary premolar areas were implanted (4.1x12mm), and random classified into 3 equal groups (n =10): Group (A) (VC): patients receiving hybrid Ti base abutments (Variobase, Straumann, Switzerland) with cement-retained crowns, Group (B) (VS): patients receiving hybrid Ti base abutments (Variobase) with screw-retained crowns, Group (C) (DS): patients receiving non-segmented screw-retained crown (cemented onto Dess Ti Base). The monolithic zirconia crowns were CAD/CAM fabricated, cemented, and evaluated at baseline, 3, 6, 12 and 18 months clinically and radiographically. All data were collected and statistically analyzed. Results: All 30 implants remained stable and reached osseointegration (100% cumulative success rate ⁅CSR⁆). The highest mean average crestal bone level (BL) measured 1.23+0.72mm (median: 1.40mm, range: 0.00-2.25mm) (P=0.09 NS) in group (C) (DS), and the least mean BL measured 1.00+0.55mm (median: 1.10mm, range: 0.00-2.00mm) and (median: 1.00mm, range: 0.10-1.90mm) (P=0.83 NS) and (P=0.52 NS) in the groups (B and A) (VS and VC) respectively. Conclusions: Under the conditions of this study, using a prefabricated (Variobase or Dess) Ti base as an abutment for an implant-supported zirconia crown is an alternative procedure for FPDs. It promotes healthy and stable hard and soft tissues. | ||
| Keywords | ||
| Variobase; Ti base; abutment design; clinical evaluation; monolithic zirconia | ||
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