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A longitudinal study of the survival of All-on-4 implants in the mandible with up to 10 years of follow-up

  • Author Footnotes
    1 Dr. Malo is the head, Malo Clinic Lisbon, Lisboa, Portugal
    Paulo Malo
    Footnotes
    1 Dr. Malo is the head, Malo Clinic Lisbon, Lisboa, Portugal
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  • Author Footnotes
    2 Mr. Nobre is the director, Research and Development Department, Malo Clinic Lisbon, Avenida dos Combatentes, 43, 9º C, Ed. Green Park, 1600-042, Lisboa, Portugal.
    Miguel de Araújo Nobre
    Correspondence
    Address reprint requests to Mr. Nobre
    Footnotes
    2 Mr. Nobre is the director, Research and Development Department, Malo Clinic Lisbon, Avenida dos Combatentes, 43, 9º C, Ed. Green Park, 1600-042, Lisboa, Portugal.
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  • Author Footnotes
    3 Dr. Lopes is the director, Oral Surgery Department, Malo Clinic Lisbon, Lisboa, Portugal
    Armando Lopes
    Footnotes
    3 Dr. Lopes is the director, Oral Surgery Department, Malo Clinic Lisbon, Lisboa, Portugal
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  • Author Footnotes
    4 Dr. Moss is an oral surgeon, Oral Surgery Department, Malo Advanced Oral Rehabilitation, Rutherford, N.J
    Steve M. Moss
    Footnotes
    4 Dr. Moss is an oral surgeon, Oral Surgery Department, Malo Advanced Oral Rehabilitation, Rutherford, N.J
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  • Author Footnotes
    5 Dr. Molina is a prosthodontist, Oral Surgery Department, Malo Advanced Oral Rehabilitation, Rutherford, N.J
    Guillermo J. Molina
    Footnotes
    5 Dr. Molina is a prosthodontist, Oral Surgery Department, Malo Advanced Oral Rehabilitation, Rutherford, N.J
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  • Author Footnotes
    1 Dr. Malo is the head, Malo Clinic Lisbon, Lisboa, Portugal
    2 Mr. Nobre is the director, Research and Development Department, Malo Clinic Lisbon, Avenida dos Combatentes, 43, 9º C, Ed. Green Park, 1600-042, Lisboa, Portugal.
    3 Dr. Lopes is the director, Oral Surgery Department, Malo Clinic Lisbon, Lisboa, Portugal
    4 Dr. Moss is an oral surgeon, Oral Surgery Department, Malo Advanced Oral Rehabilitation, Rutherford, N.J
    5 Dr. Molina is a prosthodontist, Oral Surgery Department, Malo Advanced Oral Rehabilitation, Rutherford, N.J

      ABSTRACT

      Background

      Immediate-function implants have become an accepted alternative for fixed restoration protocols in edentulous mandibles on the basis of documented high success rates. The All-on-4 concept (Nobel Biocare, Göteborg, Sweden), a surgical and prosthetic protocol for immediate function involving the use of four implants to support a fixed prosthesis in patients with completely edentulous mandibles, represents one of these protocols. The authors conducted a study to document long-term follow-up of the All-on-4 concept.

      Methods

      This longitudinal study included 245 patients with a total of 980 immediate-function implants (four per patient), all placed in the anterior region, to support fixed full-arch mandibular prostheses. The inclusion criterion was having an edentulous mandible, or a mandible with hopeless teeth, in need of fixed implant restorations.

      Results

      A total of 21 implants failed in 13 patients, giving cumulative patient-related and implant-related success rates of 94.8 percent and 98.1 percent, respectively, at five years, and 93.8 percent and 94.8 percent, respectively, with up to 10 years of follow-up. The prostheses’ survival rate was 99.2 percent with up to 10 years of follow up.

      Conclusions

      The results support the conclusion that use of the All-on-4 immediate-function implant concept in completely edentulous mandibles is viable in the long term.

      Clinical Implications

      High prosthesis survival rates can be achieved by the use of four implants to support a full-arch fixed prosthesis in the mandible.

      Key Words

      ABBREVIATION KEY

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