[Posterior implant-supported single crowns: a new treatment approach]

Area of Science:

• Dental Implantology
• Prosthodontics
• Oral Surgery

Background:

• Single crown restorations with dental implants have traditionally focused on the anterior regions.
• Reconstruction of posterior mandible and subantral augmented maxilla with single crowns presents unique challenges.

Observation:

• This clinical case presentation demonstrates the successful application of single-tooth implant restorations in the posterior mandible.
• It also highlights the first-time reconstruction of the subantral augmented maxilla using single implant-supported crowns after sinus elevation.
• The treatment philosophy imitates natural dentition, with immediate implant placement after tooth loss to maintain bone vitality.

Findings:

• Implants were placed and restored with single crowns, sized as premolars, in 16 clinical cases.
• Multiple implants were used per molar root (mesial and distal for first molars, mesial for second molars), mimicking natural root anatomy.
• The crown/root ratio was maintained below one, ensuring axial and vertical transmission of masticatory forces.
• A total of 96 single crowns and implants were placed, with 28 in the augmented subantral maxilla, showing no loss over 6 months to 3 years.

Implications:

• This approach expands the possibilities for single-tooth implant restorations into previously challenging posterior regions.
• The technique offers a viable solution for reconstructing the augmented maxilla, improving functional and aesthetic outcomes.
• The success rate suggests this philosophy is a predictable and effective treatment for single tooth replacement, preserving alveolar bone and function.