Fig.1
The initial clinical evaluation reveals a compromised posterior quadrant, featuring an old, fractured composite restoration on the first molar and a defective amalgam restoration on the second premolar. Both restorations exhibit poor marginal adaptation, inadequate occlusal morphology, and functional inefficiencies. Additionally, the presence of open contacts poses a risk of food impaction and periodontal concerns. To restore optimal function, anatomy, and esthetics, both restorations must be replaced using a precise and efficient approach that ensures long-term success.

Fig.2
The radiograph reveals open interproximal contact and irregular contouring of the existing restorations. These deficiencies contribute to food impaction, plaque accumulation, and compromised periodontal health, necessitating the replacement of both restorations.

Fig.3
Occlusal check using 40-micron articulation paper before initiating the restorative procedure.
This important step allows the clinician to accurately identify existing contact points, ensuring a precise understanding of the patient’s functional occlusion. By mapping these contacts prior to preparation, a conformative approach can be adopted, preserving the natural occlusal and preventing high spots in the final restorations. This enhances patient comfort and promotes long-term functional stability.

Fig.4
Rubber dam isolation placed and properly inverted around the cervical margins to ensure optimal moisture control and visibility.
This meticulous isolation prevents saliva and blood contamination, enhancing the bonding process and contributing to the overall success of the restorative procedure.

Fig.5
Application of caries detector dye after initial caries removal.
The dye guides the creation of the peripheral seal zone and helps determine the endpoint of caries removal in intermediate and deep dentin areas. Staining and removal of carious dentin are repeated until the peripheral seal zone is free of dye, indicating complete caries elimination.

Fig.6
Appearance of the tooth immediately after rinsing off the caries detector dye.

Fig.7
The cavities are carefully shaped to preserve sound tooth structure while ensuring mechanical stability and adhesion. Prepared surfaces are sandblasted with 29-micron aluminum oxide powder using the AquaCare device to remove debris, open enamel prisms and dentinal tubules, and increase micro-retention. This enhances bonding effectiveness, contributing to long-term restoration success.

Fig.8
Selective enamel etching performed for 20 seconds.

Fig.9
Selection and adaptation of the matrix band to ensure proper height and size.
This crucial step allows for accurate restoration of contact points, contour, and functional anatomy.

Fig.10
Two layers of Scotchbond Universal Plus adhesive (Solventum, St. Paul, MN, USA) were carefully applied, each thoroughly rubbed to ensure deep resin infiltration into dentinal tubules and enamel prisms, optimizing adhesion and minimizing postoperative sensitivity. A thin layer of highly filled flowable resin was then evenly applied over the dentin to protect the hybrid layer, enhancing bond stability and stress distribution.
For proximal adaptation, the snowplow technique was used to achieve an intimate seal at the gingival margin, displacing excess flowable resin while placing the first increment of packable composite, improving marginal integrity.
Occlusal anatomy was restored using the Espresso Posterior Technique (FMT) as described by Hardan and Akhundov, employing the Smart Replica Posterior instrument (LM-Dental, Parainen, Finland). The instrument’s convex side followed the natural cuspal inclinations, facilitating precise and efficient occlusal shaping for a functional posterior restoration with minimal adjustments.

Fig.11
The instrument’s sharp end is applied perpendicular to the occlusal surface with its concave side facing buccally, allowing precise shaping of the buccal cusp and central groove. This technique ensures accurate anatomical definition, enhancing esthetics and function while minimizing the need for extensive finishing adjustments.

Fig.12
Application of stains to mimic the natural occlusal appearance and enhance groove definition.

Fig.13
Application of a thin flowable composite resin coat to seal and protect the hybrid layer, enhancing bond durability and stress distribution.
Injectable composite is used freehand to build the distal proximal wall. This technique provides a fast, simple, and predictable way to create well-defined proximal contours with excellent marginal adaptation. The injectable composite’s optimal viscosity and handling allow smooth layering, minimizing overhangs and ensuring a seamless transition between restoration and natural tooth structure.

Fig.14
Freehand reconstruction of reduced cusps prior to placing the matrix for the remaining proximal wall.
This step provides essential structural support for the matrix and ring, preventing their collapse during proximal contouring. Following cusp build-up, the LM Posterior Replica instrument was used to precisely shape the buccal and lingual grooves, ensuring accurate anatomical replication. This technique improves esthetics and function while simplifying subsequent finishing by pre-defining natural occlusal morphology.

Fig.15
Application of the matricing system following cusp build-up to form a smooth, well-contoured proximal wall with proper contact.
The stable cuspal support prevented matrix collapse, allowing accurate adaptation and ensuring an optimal interproximal seal. This step is essential for achieving a natural emergence profile, preventing food impaction, and maintaining long-term periodontal health.

Fig.16
Careful application of the matrix, wedge, and ring to achieve a well-adapted and anatomically precise proximal wall.
The correct matrix height was selected based on the height of the adjacent proximal wall, ensuring proper contouring, preventing overbuild, and achieving a functional, harmonious contact point. This step helps avoid postoperative high spots, promoting smooth occlusal integration and patient comfort. The wedge secured the matrix to prevent overhangs, while the ring provided separation force for a tight, natural contact.

Fig.17
Alternate view showing proper matrix sealing (indicated by red arrows), height, and contouring.

Fig.18
Cavity prepared and ready for the final composite layer following completion of proximal wall build-up.

Fig.19
Alternate view showing cusp morphology, proximal walls, and contact area.

Fig.20
Use of the LM Arte Posterior Replica instrument during composite adaptation.
With the matrix system in place, the convex side of the instrument was applied to shape and adapt the composite, ensuring seamless integration with cuspal inclinations and occlusal anatomy. This technique enhances precision, minimizes voids, and reduces the need for extensive finishing. The resulting composite surface is smooth, well-adapted, and naturally contoured, demonstrating the instrument’s efficiency and accuracy.

Fig.21
Shaping the central groove during the contouring stage by applying the sharp end of the instrument perpendicular to the occlusal surface.This precise shaping prepares the groove to be filled later with stains for enhanced anatomical detail.

Fig.22
The natural occlusal anatomy and morphology were meticulously refined to optimize functional efficiency and esthetic harmony, ensuring seamless integration with the surrounding dentition. Subtle stains were applied to add depth to the occlusal grooves and improve visual integration by filling micro-spaces.
An initial finishing and polishing protocol was then performed to refine surface texture and enhance composite luster, resulting in a smooth, well-integrated restoration with excellent longevity, reduced plaque accumulation, and a natural enamel-like gloss.

Fig.23
Postoperative occlusal print recorded and compared to the preoperative print to ensure accurate restoration of functional anatomy alongside esthetics (conformative approach).

Fig.24
The image demonstrates proper proximal contact, ensuring tight interproximal adaptation that prevents food impaction. Well-contoured margins show smooth integration with the natural tooth structure, reducing the risk of overhangs or gaps. Excellent sealing is evident, with no visible microleakage or marginal discrepancies, supporting long-term durability and protection against secondary caries.
This radiographic validation highlights the precision of the technique, resulting in a functional, esthetic, and biologically sound restoration that promotes long-term success.

Conclusions

Achieving functional and esthetic posterior restorations requires a systematic and precise approach that promotes efficiency and predictability. By recording preoperative occlusion, refining cavity preparation, prioritizing cusp reconstruction, and following a structured layering protocol with appropriate instruments, clinicians can simplify complex cases while ensuring durable long-term outcomes. Postoperative radiographic verification remains an essential final step to confirm proper contact, contour, and sealing. This workflow results in restorations that are not only strong and functional but also seamlessly integrated with the patient’s natural dentition.

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