| Study |
Objective |
Methods |
Interventions |
Key findings |
Conclusions |
| Ajaj [17] |
To compare traditional veneers and no-prep veneers in terms of attributes, steps, and outcomes |
Analyzed four no-prep veneer cases made of Cerinate feldspathic pressable porcelain. Followed patients for seven years, and assessed esthetic longevity, periodontal health, patient satisfaction, and treatment impact |
No-prep veneers (Cerinate) |
- Meticulous oral hygiene and follow-up are key for periodontal health |
No-prep veneers had advantages but required careful patient management |
| - Cleaning gingival and interproximal areas is challenging |
| - Fracture/chipping risks at thin gingival margins |
| - Adequate adaptation is crucial for success |
| - Treatment is highly satisfactory with avoidable adverse outcomes |
| Pierre et al. [18] |
To evaluate the influence of preparation techniques on microleakage, marginal fit, and cement thickness of lithium disilicate veneers |
Divided 24 maxillary central incisors into groups with minimally invasive preparation and no preparation. Restored with veneers and assessed microleakage, marginal fit, and cement thickness after aging |
Minimally invasive preparation |
- Significant microleakage at the cervical vs. proximal area |
The preparation technique affected cement thickness but not microleakage or marginal fit |
| - Similar marginal fit in both groups |
| - Reduced cement thickness with minimally invasive prep at the cervical area |
| Smielak et al. [19] |
To compare the survival rates of conventional vs. no-prep/minimally invasive porcelain veneers |
Placed 186 veneers (conventional and no-prep/minimally invasive) in 35 patients. Evaluated restorations over nine years |
Conventional veneers (84) and no-prep/minimally invasive veneers (102) |
- Higher survival rate (100%) for no-prep/minimally invasive veneers vs. conventional veneers (9.67%) |
No-prep/minimal-prep veneers showed higher survival rates over nine years compared to conventional veneers |
| - Absolute failures: chipping/fractures, debonding, and tooth fracture |
| - Longer mean success rate for no-prep veneers (10.28 vs. 9.32 years) |
| Tuncdemir et al. [20] |
To determine the effects of preparation vs. non-preparation and porcelain type on color changes in laminate veneers |
Used 40 maxillary incisors in four groups (preparation/non-preparation with different porcelain types). Measured initial and post-accelerated aging color changes |
IPS e.max CAD prep |
- Preparation caused more color changes than nonpreparation |
Preparation caused more color changes in veneers, and certain fabrication methods increased color change after aging |
| - IPS e.max CAD for nonprepared PLVs increased color change after aging |
