Reproducibility of Buccal Gingival Profile Using a Custom Pick‐Up Impression Technique: A 2‐Year Prospective Multicenter Study

Lops, Diego; Bressan, Eriberto; Cea, Nicolò; Sbricoli, Luca; Guazzo, Riccardo; Scanferla, Massimo; Romeo, Eugenio

doi:10.1111/jerd.12171

Cited by 11 publications

(5 citation statements)

References 39 publications

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“…In the clinical context, a mismatch between the digitally planned margin of a CAD/CAM-customized abutment, and its intraoral position after delivery and functioning can be found [23, 24]. The use of standard impression copings or implant scan bodies with a circular diameter produces inconsistency within the emergence profile.…”

Section: Discussionmentioning

confidence: 99%

Influence of margin location and luting material on the amount of undetected cement excess on CAD/CAM implant abutments and cement-retained zirconia crowns: an in-vitro study

Gehrke

Bleuel²,

Fischer³

et al. 2019

BMC Oral Health

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Background The flexibility in designing the submucosal part of CAD/CAM customized implant abutments and the individual positioning of its shoulder line has been suggested to reduce the risk of leaving undetected cement residues, thus preventing adverse effects on peri-implant tissues. A high correlation between excess cement left in the soft tissues and the occurrence of increased biofilm accumulation with sulcular bleeding and/ or suppuration has been reported. This in turn may cause peri-implant inflammation and peri-implant marginal bone loss. The aim of this study was to assess the frequency of cement remnants after the luting of zirconia crowns on CAD/CAM custom molar abutments with different margin levels and to evaluate the impact of the luting material. Material and methods A total of 20 titanium molar CAD/CAM implant abutments (BEGO Medical GmbH) with internal taper connection/ internal hex anti-rotation protection, and a convex emergence profile with different margin positions (0, 1, 2 and 3 mm below the mucosa), were virtually designed (Implant Studio, 3Shape) and manufactured. A master cast was scanned, duplicated by a 3D printer and individual gingival masks were produced to simulate peri-implant soft tissues. 20 corresponding zirconia crowns were designed (Cerec 3D, Dentsply Sirona), produced and cemented to the abutments with two different luting materials; a zinc oxide non-eugenol cement (Temp Bond NE) or a methacrylate cement (Panavia V5). To ensure retrievability of the crown/abutment connection, occlusal openings providing access to the abutment screws were designed. Excess cement was thoroughly removed and the crown/abutment units were unscrewed to evaluate the occurrence of cement residues. All the quadrants of each specimen were evaluated for calculation of the ratio between the cement remnant area and the total specimen area using Adobe Photoshop. Spearman analysis was performed to detect correlations between different variables. A two-sided t-test, ANOVA, Mann–Whitney, and Kruskal–Wallis tests were applied to detect differences between the groups. Results Cement remnants were found in every depth of the crown abutment complex and in almost every area investigated. The amount of cement residues increased as the crown-abutment margin was located more submucosally. Lingual areas were more prone to cement remnants than other surface areas ( p = 0.0291). Excess cement was not only found at the margins of the crown-abutment complex, but also underneath (basal) the abutment itself, where cleaning was impossible. No statistical difference in the effect of zinc oxide non-eugenol- and methacrylate cement on the frequency of excess material at the lateral abutment surfaces could be demonstrated in vitro. The proportion of basal abutment aspects covered with cement residues was, however, significantly smaller in Panavia V5 samples with an average of 4.9 ± 3.7% compared to Temp Bond samples with an a...

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Section: Discussionmentioning

confidence: 99%

Influence of margin location and luting material on the amount of undetected cement excess on CAD/CAM implant abutments and cement-retained zirconia crowns: an in-vitro study

Gehrke

Bleuel²,

Fischer³

et al. 2019

BMC Oral Health

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show abstract

“…In one study, this evaluation was carried out through clinical photographs with similar outcomes (Lops et al, 2016).…”

Section: Peri-implant Soft Tissuesmentioning

confidence: 99%

“…Forest plot for the changes in marginal bone levels within each type of abutment material different to titanium 2015;Lops et al, 2016) or an endodontic file, reporting minimal or no changes (−0.2 to 0.7 mm) with similar outcomes when comparing different abutment materials (0-0.4 mm;Baldini et al 2016;Carrillo de Albornoz et al, 2014;Zembic et al, 2009). …”

mentioning

confidence: 99%

Biological effect of the abutment material on the stability of peri‐implant marginal bone levels: A systematic review and meta‐analysis

Sanz‐Sánchez

Sanz‐Martín

Albornoz

et al. 2018

Clinical Oral Implants Res

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“…Implants that were not placed at the bone level were excluded from the statistical analysis. A provisional screw-retained prosthetic restoration was placed after the osteointegration period and left for 12 months for tissue maturation [27].…”

Section: Surgical and Prosthetic Proceduresmentioning

confidence: 99%

Influence of the implant-abutment connection on the ratio between height and thickness of tissues at the buccal zenith: a randomized controlled trial on 188 implants placed in 104 patients

Farronato

Pasini

Manfredini³

et al. 2020

BMC Oral Health

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Background To compare tissue response to two implant systems, featuring internal hexed connections with different designs. Methods Patients enrolled in this randomized controlled trial were assigned to two groups. In Group 1, patients were treated with implants with a 5° conical internal hexed connection (Anyridge®, MegaGen, South Korea). In Group 2, patients were treated with implants with an internal hexed connection (Core®, Kristal, Italy). After implant placement and a provisionalisation period of 12 months, impressions were taken, stone casts were poured and digitised with a desktop scanner (D700®, 3Shape, Copenhagen, Denmark). In a digital environment, for each fixture, two values were collected at the buccal zenith: the height of the peri-implant mucosa (mucosal height; MH), calculated from the vestibular shoulder of the implant analogue to the upper gingival margin of the supra-implant tissue; and the width of the peri-implant mucosa (mucosal thickness; MT), calculated from the vestibular shoulder of the analogue to the external mucosa point perpendicular to the implant major axis. The mean and standard deviation for MH and MT, as well as their ratios, were calculated for each group; the sectors in which the implants were placed were also considered. Finally, correlation between MH, MT, connection type and sector was assessed by Pearson’s correlation coefficient, with significance level set at 0.05, and a confidence interval (CI) set at 95%. Results Data deriving from 188 implants placed in 104 patients were evaluated. The mean MH values were 3.32 (± 0.12) and 2.70 (± 0.16) mm for Groups 1 and 2, respectively. The mean MT values were 4.37 (± 0.16) and 3.93 (± 0.18) mm for Groups 1 and 2, respectively. Group 1 showed higher MH and MT values and a better ratio (1.50 ± 0.88) than Group 2 (1.81 ± 1.20). The MH, MT and MH/MT ratio were significantly influenced both by sector (p = 0.015) and group (p = 0.047). Conclusions Within the limits of this study, the 5° connection implants supported a more extended tissue height and thickness at the buccal zenith, and a better ratio between them. Trial registration This study was retrospectively registered in Clinicaltrials.gov, with number NCT04160689, dated 13/11/2019.

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Reproducibility of Buccal Gingival Profile Using a Custom Pick‐Up Impression Technique: A 2‐Year Prospective Multicenter Study

Cited by 11 publications

References 39 publications

Influence of margin location and luting material on the amount of undetected cement excess on CAD/CAM implant abutments and cement-retained zirconia crowns: an in-vitro study

Influence of margin location and luting material on the amount of undetected cement excess on CAD/CAM implant abutments and cement-retained zirconia crowns: an in-vitro study

Biological effect of the abutment material on the stability of peri‐implant marginal bone levels: A systematic review and meta‐analysis

Influence of the implant-abutment connection on the ratio between height and thickness of tissues at the buccal zenith: a randomized controlled trial on 188 implants placed in 104 patients

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