Discussion : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study [2]
The mean marginal bone level was 0.94 mm below the neck of the implant at 1 month after restoration placement (T1). The optimal position of the peri-implant bone after a maturation period should be at the same level as the neck of the implant. This means that part of the biological width of the present study, which is acting as a barrier, was in contact with the implant surface roughness and was therefore more prone to biofilm formation, soft tissue infection, and peri-implantitis. Apparently, the large gap between the socket wall and the regular diameter implant, notwithstanding the local augmentation procedure, did not fill completely during healing which led to a compromised bone level. The Checchi et al. [22] study also mentioned that the bone level at the commencement of loading was 0.43 mm apically of the implant neck, possibly confirming the idea that better initial bone levels are reached with wider implants.
The mean change of the marginal bone height during the 1-year follow-up was − 0.17 mm, which is very limited. The Tallarico et al. and Checchi et al. studies’ peri-implant bone loss [21, 22] was 0.23 mm and 0.68 mm respectively, from initial loading to the 1-year evaluation. Apparently, after the period of healing and maturation peri-implant, bone levels remain rather stable.
Zirconia restorations are presumed to be highly biocompatible and can potentially attach to soft-tissue. It is claimed that zirconia promotes the attachment of human gingival fibroblasts in vivo, which is desirable because it mimics tooth cementum’s ability to attach to gingiva, forming the junctional epithelium [25]. With respect to the evaluation items of the peri-implant soft tissues of the present study, the findings are consistent with a healthy status, confirming the high biocompatibility of the material. The limited probing depth (mean value of 1.9 mm at the 1-year evaluation) is possibly associated with the claimed soft-tissue attachment potential. An advantage of screw-retained restorations is the absence of a microgap at the interface of the crown and abutments and the absence of possible cement remnants in the area of the peri-implant soft tissues. The use of abutments with angulated screw channels could, as a consequence of its design, promote soft tissue health. In addition, the high patient compliance to the prescribed post-treatment oral hygiene instructions could have played an important role in the observed very healthy peri-implant soft tissues.
Serial posts:
- Abstract : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- Background : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- Materials and methods : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study [1]
- Materials and methods : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study [2]
- Materials and methods : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study [3]
- Results : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- Discussion : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study [1]
- Discussion : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study [2]
- Discussion : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study [3]
- Conclusion : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- Availability of data and materials : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- References : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study [1]
- References : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study [2]
- References : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study [3]
- Acknowledgements : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- Funding : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- Author information : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- Ethics declarations : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- Additional information : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- Rights and permissions : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- About this article : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- Table 1 Baseline characteristics of the study group : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- Table 2 Frequencies and percentages of plaque index scores (possible score 0–3), calculus index scores (possible score 0–1), gingival index scores (possible score 0–3), bleeding index scores
- Table 3 Mean value, standard deviation, and frequency distribution (percentages) of marginal bone level at 1 month after restoration placement (T1) : Immediate implant placement in molar extraction
- Table 4 Mean value, standard deviation, and frequency distribution (percentages) of marginal bone change between 1 month after restoration placement (T1) and 1 year in function (T12) : Immediate
- Table 5 Patient’s satisfaction 12 months (T12) after restoration placement : Immediate implant placement in molar extraction sites: a 1-year prospective case series pilot study
- Fig. 1. Pre-operative panoramic radiograph of a failing molar in position 36 : Immediate implant
- Fig. 2. Intraoral radiograph of an immediately placed post-extractive dental implant with a full contour zirconia restoration after 1 year (same patient as in Fig. 1) : Immediate implant