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One Abutment One Time: A Multicenter, Prospective, Controlled, Randomized Study

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  • José Vicente Ríos-Santos

    (Advanced Periodontics, Facultad de Odontología, Universidad de Sevilla, C/Avicena S/N, 41009 Seville, Spain)

  • Gregorio Tello-González

    (Advanced Periodontics, Facultad de Odontología, Universidad de Sevilla, C/Avicena S/N, 41009 Seville, Spain)

  • Pedro Lázaro-Calvo

    (Advanced Periodontics, Facultad de Odontología, Universidad de Sevilla, C/Avicena S/N, 41009 Seville, Spain)

  • Francisco Javier Gil Mur

    (Technological Health Research Center, Biomaterials of the Faculties of Medicine and Dentistry, International University of Cataluña, 08034 Barcelona, Spain)

  • Blanca Ríos-Carrasco

    (Advanced Periodontics, Facultad de Odontología, Universidad de Sevilla, C/Avicena S/N, 41009 Seville, Spain)

  • Ana Fernández-Palacín

    (Department of Biostatistic, Dental School, Universidad de Sevilla, 41009 Sevilla, Spain)

  • Mariano Herrero-Climent

    (Porto Dental Institute, 4150-518 Porto, Portugal)

Abstract

Aim : (PRIMARY) Assess the changes in bone level (6 and 12 months after implant placement) between the test (definitive abutment (DEF)) and control (healing abutment (HEA)) groups. (SECONDARY) Assess the changes in bone level (6 and 12 months after implant placement) between the 1 mm high abutment group and 2 mm abutment group. Evaluate changes in implant stability recorded with analysis of the resonance frequency (RFA) Osstell system, at 6 and 12 months after implant placement, between the control group (HEA) and test (DEF). For the DEF group, the abutment was placed at the time of the surgery and was never removed. For the HEA group, the abutment was removed three times during the manufacture of the crowns. The abutments used were 1 mm high (Subgroup A) and 2 mm high (Subgroup B). Materials and methods: A total of 147 patients were selected between 54.82 ± 11.92 years old. After implant placement, patients were randomly distributed in the DEF and HEA group. After the implant placement, a periapical radiograph was taken to assess the peri-implant bone level; the same procedure was carried out 6 and 12 months post-placement. To compare the qualitative variables between the groups (HEA/DEF), the Chi-square test was used; for quantitative (MANOVA). Results : After a year, the accumulated bone loss was 0.48 ± 0.71 mm for the HEA group and 0.36 ± 0.79 mm for the DEF group, without statistical significance. Differences were only found due to timing (time) between 0 and 6 months (=0.001) and 0 and 12 months (0.001), with no differences attributable to the study groups (DEF and HEA). The accumulated bone loss (1 year) was 0.45 ± 0.78 mm for the 1 mm abutment group and 0.41 ± 0.70 mm for the 2 mm abutment group ( p = 0.02). No differences were observed in implant stability between groups. Conclusions : The “One Abutment—One Time” concept does not reduce peri-implant bone loss compared to the connection–disconnection technique. The height of the abutment does influence bone loss: the higher the abutment, the lower the bone loss.

Suggested Citation

  • José Vicente Ríos-Santos & Gregorio Tello-González & Pedro Lázaro-Calvo & Francisco Javier Gil Mur & Blanca Ríos-Carrasco & Ana Fernández-Palacín & Mariano Herrero-Climent, 2020. "One Abutment One Time: A Multicenter, Prospective, Controlled, Randomized Study," IJERPH, MDPI, vol. 17(24), pages 1-17, December.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:24:p:9453-:d:463629
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    References listed on IDEAS

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    1. Hélder Oliveira & Aritza Brizuela Velasco & José-Vicente Ríos-Santos & Fernando Sánchez Lasheras & Bernardo Ferreira Lemos & Francisco Javier Gil & Alexandrine Carvalho & Mariano Herrero-Climent, 2020. "Effect of Different Implant Designs on Strain and Stress Distribution under Non-Axial Loading: A Three-Dimensional Finite Element Analysis," IJERPH, MDPI, vol. 17(13), pages 1-17, July.
    2. Carmen María Díaz-Castro & Pedro Lázaro Calvo & Francisco Javier Gil & Ana Fernández-Palacín & José-Vicente Ríos-Santos & Mariano Herrero-Climent, 2020. "A Non-Interventional Study Documenting Use and Success of Tissue Level Implants," IJERPH, MDPI, vol. 17(13), pages 1-13, July.
    3. Paolo Cappare & Gianpaolo Sannino & Margherita Minoli & Pietro Montemezzi & Francesco Ferrini, 2019. "Conventional versus Digital Impressions for Full Arch Screw-Retained Maxillary Rehabilitations: A Randomized Clinical Trial," IJERPH, MDPI, vol. 16(5), pages 1-15, March.
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