This medical illustration is an anatomical diagram depicting a dental specimen with a Class V cavity preparation, intended for educational use in operative dentistry. The sketch shows a single-rooted tooth, likely a maxillary incisor, from a proximal view. The drawing illustrates a standardized preparation for a composite resin restoration. The cavity is located on the facial surface of the crown, positioned approximately one-third to two-thirds of the crown height. Key anatomical landmarks shown include the clinical crown, the cementoenamel junction (CEJ), and the root. The preparation is characterized by a box-like morphology with rounded internal line angles and distinct, clean margins. A specific clinical detail illustrated is the clearance between the cavity's gingival margin and the CEJ, as well as its relationship to the proximal finish lines. This diagram serves as a schematic for Porcelain Laminate Veneer (PLV) research and dental student training in cavity design and restorative protocols.

Clinical photograph of a laboratory specimen demonstrating dental cavity preparation and template fabrication. The image shows an extracted human maxillary central incisor crown mounted on a yellow dental stone base. A Class V cavity preparation is visible on the facial surface of the tooth crown, characterized by smooth internal walls and a defined cavosurface margin. A red autopolymerized acrylic resin (GC Pattern Resin) has been applied within the prepared cavity to serve as a standardized template. A slender, cylindrical handling pin or instrument is embedded into the red resin, extending coronally to facilitate the removal and placement of the template. This setup is utilized in restorative dentistry research to ensure uniformity in cavity dimensions across multiple specimens for testing composite filling or porcelain laminate veneer (PLV) protocols. The contrast between the off-white tooth structure and the red resin highlights the precise fit of the guide within the dental preparation.

This clinical intraoral photograph displays a series of cavity preparations on the right maxillary posterior teeth (specifically teeth 14, 15, and 16). The preparations follow biomechanical principles for CAD/CAM ceramic restorations, featuring rounded internal line angles and smooth, distinct margins. Within the cavities, a light-colored, opaque composite base material (core build-up) is visible, used to level the cavity floors and protect endodontic access sites. Significant tooth-structure discoloration and staining are present on the prepared molar (tooth 16), likely indicative of previous restorative leakage or long-term endodontic treatment effects. The adjacent gingival tissues appear pink and healthy, with firm adaptation and no signs of acute inflammation or recession. The surrounding dental arch includes existing aesthetic restorations on the anterior and left posterior segments, demonstrating a comprehensive rehabilitative clinical scenario. This image is used to illustrate prosthetic preparation techniques, base placement, and preoperative assessment in restorative dentistry.