INTRODUCTION
The restoration of anterior teeth is one of the biggest challenges for a dentist, because of the difficulties in color matching, and in recreating natural internal structure of the tooth.
Small median diastemas and small restorations are the most difficult ones to restore, so we will use a new matrix (UNICA matrix) to make the process easy.

Fig.1

Initial smile of the 26 years old patient (shy smile).

Fig.2

Initial occlusion intra-oral view, first of all we should improve oral hygiene by scaling and polishing the teeth, and also by giving instructions for good oral hygiene.

Fig.3

Initial situation, side and occlusal intra-oral view.

Fig.4

Initial situation, frontal and occlusal intra-oral view.

Fig.5

Isolation with rubber dam is very important in order to provide a clean, clear and dry environment.

Fig.6

All sharp edges were rounded up by diamond football bur.

Fig.7

Smoothening the bevel area with a coarse disc to ensure complete removal of sharp edges and unsustained enamel prisms.

Fig.8

Isolate and protect the adjacent teeth (non working side) with teflon.

Fig.9

Conditioning the tooth surface with etching 37% phosphoric acid.

Fig.10

Rinsing the etching gel by water carefully to ensure complete removal.

Fig.11

Application of a generous amount of bonding.

Fig.12

Light curing of the adhesive.

Fig.13

Insertion of two Unica matrices and fix it by wedge, its use to give anatomical contour and emergence profile that was the biggest challenge during diastema closure.

Fig.14

Bending the Unica matrix from palatal side to create the palatal in addition to the proximal wall in one step.

Fig.15

After removing the Unica matrix, the result is a three dimensional enamel composite mould.

Fig.16

Increment of the dentin shade with build-up of the first internal tooth structure.

Fig.17

The restoration is completed by applying a layer of enamel composite and the CompoBrush (Smile Line,Powered by Styleitaliano) for better adaptation.

Fig.18

Inter-dental finishing strips to finishing the area interdentally.

Fig.19

Polishing paste with goat brush.

Fig.20

A rubber cup is used make the surface glossy.

Fig.21

Final polishing with felt wheel.

Fig.22

Immediate frontal intra-oral view, healing of the gum should be satisfying on the check-up appointment, along with the color after rehydration.

Fig.23

Immediate intra-oral view.

Fig.24

Frontal intra-oral view after one week. Aesthetics and function are completely restored.

Fig.25

Final occlusion intra-oral view to show complete color matching.

Fig.26

Final self-confident smile.

Fig.27

Comparisons of occlusion and the patient’s smile before and after.

Fig.28

Comparisons of intra-oral frontal view and the patient’s smile before and after. The periapical x-ray shows there is no overhanging of the filling material.

Fig. 29

Comparisons of patient frontal view: initial, immediate and one week later.

Conclusions

When dealing with aesthetic restorations, an optimal reconstruction of the tooth profile is paramount. In case of diastema closure and class IV restorations, various tools and procedures can help the clinician to correctly restore the emergency profile; among these, the new Unica anterior matrix stands out because of its simplicity and versatility, allowing to quickly and easily restore both cervical and interproximal profiles at the same time, strongly reducing the chair-side time, and bringing aesthetics restorations within everyone’s reach.

Bibliography

1. Chiodera G. Replacement of a class V composite restoration. https://polydentia.ch/en/dr-chiodera-giuseppe-replacement-of-a-class-v-composite-restoration/.

2. Manauta J. Direct Stratification Composite Veneers with UNICA Anterior. https://polydentia.ch/en/dr-manauta-jordi-direct-stratification-composite-veneers-unica-anterior/.

3. Lazar D. Class IV restorations with UNICA Anterior. https://polydentia.ch/en/dr-lazar-class-iv-restoration-unica-anterior.