Implant in esthetic zone refers to dental implant placement in the anterior region of the mouth, which is an area that is clearly visible when smiling. Therefore, special attention must be given to aesthetics, including the shape, color, and alignment of the teeth, as well as the gum contour, to achieve a natural-looking result.

The anterior region is more complex than the posterior region because success must be achieved in three dimensions, including:

1. White esthetics The crown placed on the implant must have size, shape, color, and surface texture that harmonize with the adjacent natural teeth and appear natural.
2. Pink esthetics The gum tissue surrounding the crown must have a pleasing shape and color, with gingival margins that are harmonious with adjacent teeth, and without black triangles.
3. Bone stability The bone in the anterior region is often thinner than in the posterior region; therefore, it is necessary to preserve the bone after extraction or perform appropriate bone grafting.

Implant placement in the esthetic zone uses a concept called Prosthodontic Driven Implant, which involves planning the implant position based primarily on the position of the crown. The steps are as follows:

1. Examination, diagnosis, and digital treatment planning
   • 3D radiographic imaging: Used to evaluate bone thickness, the position of the nasal cavity, the position of adjacent teeth, and to simulate the most appropriate implant position.
   • Digital Smile Design (DSD): Used to design the smile and determine the size of the new crown to match the patient’s facial structure and existing teeth.
   • Surgical Guide: A 3D-guided template created from a digital system to assist in placing the implant accurately according to the treatment plan.
2. Soft tissue and bone management techniques
   Because bone and gum tissue tend to resorb after tooth extraction, the dentist may need to use additional techniques as follows:
   • Socket Preservation: In cases of recent extraction, bone and gum grafting may be performed immediately to prevent bone resorption before implant placement.
   • Bone & Soft Tissue Grafting: If there is insufficient bone, bone grafting or gum grafting around the implant may be required to achieve adequate and esthetically pleasing tissue volume.
3. Provisional Restoration
   During the period while the bone integrates with the implant (approximately 3–6 months), the patient will have a temporary crown with the following purposes:
   • Maintain smile and confidence: Allowing the patient to carry out daily life as normal.
   • Shape the gum tissue: The provisional crown is designed to gently support the gum to help contour it into a natural and esthetic form.
4. Final restoration
   Crowns used in the esthetic zone are typically made from all-ceramic materials (such as Zirconia or E-max) that have translucency very similar to natural teeth. The color and shape are carefully customized to match the patient’s adjacent teeth.
   

• Highly natural esthetics: Provides the most natural-looking results and blends most harmoniously with natural teeth compared to other types of tooth replacement.
• Preserves bone and gum tissue: Helps maintain facial structure and prevents bone and gum collapse in the anterior region, which affects esthetics.
• Durability and long-term function: Strong and allows stable chewing function.
• Does not damage adjacent teeth: No need to prepare adjacent teeth, unlike dental bridges.

Patient information:
          A 65-year-old Thai male, retired government officer.
Present illness:
          The patient presented with the chief complaint of trauma to the upper anterior teeth. The upper left central incisor was impacted and avulsed 4 months ago. Currently, the patient is wearing a temporary prosthesis.
Medical history:
          The patient denies any underlying diseases, has no history of drug allergies, and has no conditions affecting bone healing.
Clinical and radiographic examination:
          Intraoral examination:
          The gingival ridge at tooth #21 shows a U-shaped contour, with slight horizontal ridge resorption.

          CBCT radiograph (Cone Beam Computed Tomography): It was found that at tooth #21, the labial bone is fractured in a V-shape, while the palatal bone remains intact.

Diagnosis:
          21 V-shaped facial bone defect
Treatment plan:
          After explaining the treatment options, such as making a new denture, fixed dental bridge, and dental implant, including their advantages, disadvantages, and costs, the patient decided to proceed with dental implant treatment in order to achieve a strong and most natural-looking restoration.
          Step 1: Medical history taking, extraoral and intraoral examination, oral scanning, and 3D radiography for treatment planning, smile design (DSD), and 3D surgical guide design.
          Step 2: Surgical placement of a dental implant at tooth #21 using a 3D surgical guide, followed by bone grafting and placement of a provisional crown prepared in the laboratory.

          Step 3: Wait for osseointegration of the implant with the bone (approximately 3 months). After that, adjust the shape of the provisional crown to achieve a tooth and gingival contour that is esthetic and harmonious with the adjacent teeth.

          Step 4: Select tooth shade and take an impression for fabrication of the final crown.
          Step 5: Place the final crown, evaluate esthetics and occlusion until the patient is satisfied, then secure the crown to the implant with a torque of 30 Ncm. Cover the screw access hole with tooth-colored material, and provide instructions on care and oral hygiene.

Follow-up:
          The patient was scheduled for weekly follow-up visits until normal function was achieved. After that, the patient was scheduled for maintenance visits every 6 months.

Dental implant placement in the esthetic zone restores the smile to a natural appearance and helps regain the patient’s confidence. It is a treatment that provides good results compared to other treatment options. However, treatment in this area requires knowledge and careful planning to achieve successful outcomes, with good esthetics and full function.