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Implant angulation: 2-year retrospective analysis on the influence of dental implant angle insertion on marginal bone resorption in maxillary and mandibular osseous onlay grafts

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Abstract

Objectives

The purpose of this study was to determine the existence of correlations between marginal peri-implant linear bone loss and the angulation of implants in maxillary and mandibular augmented areas over the course of a 2-year survey.

Materials and methods

Dependent variables described the sample of the present retrospective chart review. By using three-dimensional radiographs, input variables, describing the implant angulation (buccal–lingual angle [φ] and mesial–distal angle [θ]) were measured; outcome variables described survival rate and marginal bone resorption (MBR) around dental implants in autogenous grafts (10 maxillae and 14 mandibles). Pairwise comparisons and linear correlation coefficient were computed.

Results

The peri-implant MBR in maxillary buccal and palatal areas appeared less intensive in the presence of an increased angulation of an implant towards the palatal side. Minor MBR was recorded around mandibular dental implants positioned at a right angle and slightly angulated towards the mesial.

Conclusions

Resorption in buccal areas may be less intensive as the angulation of placed implants increases towards the palatal area in the maxilla, whereas for the mandible, a greater inclination towards the lingual area could be negative. In the mandibular group, when the implant was slightly angulated in the direction of the distal area, bone resorption seemed to be more marked in the buccal area.

Clinical relevance

In the planning of dental implant placement in reconstructed alveolar bone with autograft, the extremely unfavourable resorption at the buccal aspect should be considered; this marginal bone loss seemed to be very sensitive to the angulation of the dental implant.

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Acknowledgments

Clinical data were collected by the group composed of Prof. Ludovico Sbordone, MD, DDS; Dr. Franco Guidetti (acting director, Complex Operating Unit of Maxillo-Facial Surgery, Azienda Ospedaliero–Universitaria Pisana, Pisa, Italy); Dr. GiovanBattista Menchini Fabris, (former research fellow, Dept. of Surgery, University of Pisa/UOC Odondostomatology and Implantology, AOUP); Dr. Paolo Toti, within the study protocol approved by the Ethics Committee of the University of Pisa. The present study has been supported in part through the Ministero dell’Istruzione, Università e Ricerca Scientifica (MIUR Italian Dept. of Education, University and Scientific Research) PRIN 2008 2008K4XXF8_02 (CUP G51J10000030001) to Prof. Ludovico Sbordone, and 2008K4XXF8_03 (CUP E61J100000200001) to Prof. Ranieri Martuscelli.

Conflict of interest

All authors certify that no financial relationships, current or within the past 5 years, exist regarding any of the products involved in this study.

Author information

Authors and Affiliations

  1. Department of Neurosciences, Reproductive and Odontostomatological Sciences, School of Medicine, University of Naples “Federico II”, Via S. Pansini 5, 80131, Naples, Italy

    Luca Ramaglia, Carolina Sbordone & Ranieri Martuscelli

  2. Department of Surgical, Medical, Molecular and Critical Area Pathology, University of Pisa, Via Paradisa 2, 56124, Pisa, Italy

    Paolo Toti

  3. Complex Operating Unit of Maxillo-Facial Surgery, Azienda Ospedaliero-Universitaria Pisana, Via Paradisa 2, 56100, Pisa, Italy

    Franco Guidetti

  4. Department of Medicine and Surgery, University of Salerno, Via S. Allende, 84081, Baronissi, Italy

    Ludovico Sbordone

  5. Department of Surgery and Complex Operating Unit of Odontostomatology and Implantology, Head and Neck Clinical Department, University of Pisa and Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy

    Ludovico Sbordone

Authors
  1. Luca Ramaglia
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  2. Paolo Toti
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  3. Carolina Sbordone
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  4. Franco Guidetti
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  5. Ranieri Martuscelli
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  6. Ludovico Sbordone
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Corresponding author

Correspondence to Carolina Sbordone.

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Ramaglia, L., Toti, P., Sbordone, C. et al. Implant angulation: 2-year retrospective analysis on the influence of dental implant angle insertion on marginal bone resorption in maxillary and mandibular osseous onlay grafts. Clin Oral Invest 19, 769–779 (2015). https://doi.org/10.1007/s00784-014-1275-5

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  • DOI: https://doi.org/10.1007/s00784-014-1275-5

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