Preparation designs and ceramic materials for premolar veneers: Effects on marginal adaptation and failure load.

American journal of dentistry, cilt.38, sa.4, ss.313-318, 2025 (SCI-Expanded, Scopus)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 38 Sayı: 4
Basım Tarihi: 2025
Dergi Adı: American journal of dentistry
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, MEDLINE
Sayfa Sayıları: ss.313-318
Kocaeli Üniversitesi Adresli: Evet

ABSTRACT: Purpose: To evaluate the effects of different preparation designs and ceramic materials on the marginal

adaptation and failure load of laminate veneer restorations (LVRs) on premolars. Methods: Premolar LVRs (0.4 mm

thickness) were fabricated using featheredge (F) and butt-joint (B) preparations and four ceramics; Cerec Tessera (CT),

Vita Enamic (VE), IPS e.max CAD (EmC), and IPS e.max Press (EmP) (n= 80). Marginal gap (MG) was measured by

silicone replica technique. After cementation on epoxy resin dies and 5,000 thermal-cycles, failure load (FL) was tested

at the buccal cusp (0.5 mm/minute). Data were analyzed with a two-way ANOVA, Tukey, t-test, (P< 0.05), and fracture

types were classified. Results: Preparation design and ceramic material had statistically significant effects on MG and

FL (P< 0.001). B design showed significantly better MG and FL values than F design (P< 0.05). VE exhibited the

lowest MG for both preparations, whereas EmP showed the highest MG for B, and EmP and CT for F (P< 0.05). CT

showed significantly higher FL than EmP for both preparations (P< 0.05). All failures were catastrophic.