Evaluation of contiguous implants with cement-retained implant-abutment connections. A minipig study

  • Raquel Rezende Martins De Barros | info@ariesdue.it Department of Bucco-Maxillo-Facial Surgery and Traumatology and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
  • Arthur Belém Novaes Jr. Department of Bucco-Maxillo-Facial Surgery and Traumatology and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
  • Vula Papalexiou Center of Biologic and Health Science, School of Dentistry, Catholic Pontifical University, PR, Brazil.
  • Sônia Mara Luczyszyn Center of Biologic and Health Science, School of Dentistry, Catholic Pontifical University, PR, Brazil.
  • Stylianos Nicolas Papalexiou Neto Center of Biologic and Health Science, School of Dentistry, Catholic Pontifical University, PR, Brazil.
  • Cassiana Maria Garcez Ramos Center of Biologic and Health Science, School of Dentistry, Catholic Pontifical University, PR, Brazil.
  • Adriana Luisa Gonçalves De Almeida Department of Bucco-Maxillo-Facial Surgery and Traumatology and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
  • Adriano Piattelli School of Dentistry, University of Chieti-Pescara, Chieti, Italy.
  • Bartolomeo Assenza Private Practice, Milan, Italy.

Abstract

Aim The presence of a microgap at the implant-abutment interface may permit bacterial contamination and lead to bone resorption, interfering with papillae formation. The present study evaluated adjacent implants with cement-retained abutments as an option to control such deleterious effects. Materials and methods Seven minipigs had their bilateral mandibular premolars previously extracted. After 8 weeks, four implants were installed in each hemi-mandible of each animal. The adjacent implants were randomly inserted on one side at the crestal bone level and on the other, 1.5 mm subcrestally. Immediately, a non-submerged healing and functional loading were provided with the abutments cementation and prostheses installation. Clinical examination and histomorphometry served to analyze the implant success. Results A total of 52 implants were evaluated at the end of the study. The subcrestal group achieved statistical better results when compared to the crestal group, clinically in papillae formation (1.97 x 1.57 mm) and histomorphometrically in crestal bone remodeling (1.17 x 1.63 mm), bone density (52.39 x 45.22%) and bone-implant contact (54.13 x 42.46%). Conclusion The subcrestal placement of cement-retained abutment implants showed better indexes of osseointegration and also improved papillae formation and crestal bone remodeling at the interimplant area after immediate loading, making them a promising option for the treatment of esthetic regions.

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Published
2014-03-30
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Keywords:
Abutment, Bone resorption, Dental implant, Papillae formation.
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How to Cite
Martins De Barros, R. R., Novaes Jr., A. B., Papalexiou, V., Luczyszyn, S. M., Papalexiou Neto, S. N., Garcez Ramos, C. M., Gonçalves De Almeida, A. L., Piattelli, A., & Assenza, B. (2014). Evaluation of contiguous implants with cement-retained implant-abutment connections. A minipig study. Journal of Osseointegration, 6(1), 3-10. https://doi.org/10.23805/jo.2014.06.01.01