Fixed Conometric Retention with CAD/CAM Conic Coupling Abutments and Prefabricated Syncone Caps: A Case Series

Bressan, Eriberto; Venezze, Alvise Cenzi; Magaz, Vanessa Ruiz; Lops, Diego; Ghensi, Paolo

doi:10.11607/prd.3161

Cited by 11 publications

(13 citation statements)

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“…The patient was excluded from this study, and the implants restored using a different prosthetic approach. In a recent paper, Bressan et al proposed using the Atlantis CAD/CAM technology (Dentsply Sirona Corp.) to produce pre‐parallelized abutments designed to use the conical retention to overcome this issue. Furthermore, a minimum vertical distance of 8.0 mm between the implant platforms and the occlusal surfaces of the antagonists must be achieved to obtain an ideal thickness of the disilicate portion of the prosthesis.…”

Section: Discussionmentioning

confidence: 99%

The Conometric Concept: A Two‐Year Follow‐Up of Fixed Partial CEREC Restorations Supported By Cone‐In‐Cone Abutments

Degidi¹,

Nardi

Sighinolfi³

et al. 2018

Journal of Prosthodontics

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Purpose To evaluate the performance of definitive, implant‐supported, lithium disilicate fixed dental prostheses (LS2 FDPs) manufactured with a computer‐assisted design/computer‐assisted manufacturing (CAD/CAM) system. All patients received two‐unit restorations placed in posterior regions, supported by osseointegrated implants with cone‐in‐cone connection abutments. Materials and Methods Two implants (Ankylos) were placed into healed sites or fresh extraction sockets in the maxillary/mandibular posterior regions of partially edentulous patients. Definitive digital impressions were made 3 months after surgery. Twenty‐four patients received fixed monolithic LS2 restorations manufactured with the CEREC system. All restorations were connected to the implants using cone‐in‐cone connection abutments. Peri‐implant pocket depths were recorded for 2 years at each follow‐up visit. Esthetic, functional, and biologic United States Public Health Services (USPHS) parameters modified by the FDI World Dental Federation study design were assessed yearly until the last follow‐up appointment. The opposing dentitions were identified by type of restoration and supporting structures at the time of placement of the definitive restorations and at the 2‐year follow‐up visits. Results One patient (4.16%) moved to an unknown location during the study. A total of 23 FDPs (95.8%) supported by 46 implants reached the 2‐year follow‐up. None of the prostheses failed, or became loose or detached. No significant difference involving probing levels between the experimental times were found. Conclusions The results of this research indicated that the abutment‐prostheses connection using a cone‐in‐cone approach was successful within the 2‐year period of this study. None of the studied monolithic LS2 glass‐ceramic prostheses milled using the CEREC CAD/CAM system fractured or became detached.

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Section: Discussionmentioning

confidence: 99%

The Conometric Concept: A Two‐Year Follow‐Up of Fixed Partial CEREC Restorations Supported By Cone‐In‐Cone Abutments

Degidi¹,

Nardi

Sighinolfi³

et al. 2018

Journal of Prosthodontics

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“…CAD-CAM abutments, on the other hand, are already parallel to each other with optimized height and emergence profile. [ 16 ]…”

Section: Discussionmentioning

confidence: 99%

“…Lateral tipping using a wood stick or lateral rocking of the prosthesis using forceps with silicon coating could be used for retrieving the prosthesis. [ 15 16 ]…”

Section: Methodsmentioning

confidence: 99%

Evaluation of clinical and radiographic outcome of friction fit conical abutment system in implant-supported dental prostheses: An in vivo study

Sharma

Paliwal

Bhansali

et al. 2022

J Indian Prosthodont Soc

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Aim: The purpose of this clinical study was to analyze the clinical feasibility of friction fit conical abutment system in implant-supported fixed dental prostheses as an alternative to cement and screw retention. Settings and Design: This was an in vivo longitudinal study. Materials and Methods: A total of 10 prostheses were designed as 3- or 4-unit fixed dental prostheses supported by two implants. All the subjects selected were evaluated for pocket probing depth (PPD) and marginal bone loss at the time of implant placement (T1), at the time of placement of friction fit prostheses (T2), and 12 months after placement of friction fit prostheses (T3). Marginal bone loss at T2 and T3 was measured with respect to bone levels at T1 and T2, respectively. The patient satisfaction was assessed at T2 and T3 using FDI clinical criteria and scoring system (modified by Monaco et al .). Statistical Analysis Used: Shapiro–Wilk test was employed to test the normality of data. Paired sample t -test was performed for quantitative variables. Results: A total of twenty implants were inserted in ten partially edentulous spaces; the average patient age was 50.2 years. No significant difference was seen between T2 and T3 for PPD. Comparison of marginal bone loss using paired t -test showed a statistically highly significant difference at T2 and T3 with higher value at T2. No prostheses were dislodged during postprosthetic follow-up. The survival rate was 100% for both the abutments and implants. No change in surface luster was observed 12 months following prosthetic rehabilitation in any case. No prostheses or framework fracture was reported and all patients were satisfied with the prosthesis received. Conclusions: Friction fit conical abutment system can act as a novel approach for the retention of implant-supported fixed dental prostheses.

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“…The employment of conically coupled abutments with different designs indicated promising prosthetic results. Hybrid-acrylic prostheses and lithium disilicate or monolithic zirconia fixed partial dentures (FPDs) and single crowns (SCs) retained by conical friction showed minimal technical problems and healthy peri-implant soft-tissues [ 12 , 13 , 14 , 15 , 16 ]. The reported benefits of this concept are the avoidance of cements or the omission of additional retaining screws, the formation of an anatomical soft tissue profile, ease of maintenance, and the use of low-cost prefabricated components.…”

Section: Introductionmentioning

confidence: 99%

Marginal Adaptation and Microbial Leakage at Conometric Prosthetic Connections for Implant-Supported Single Crowns: An In Vitro Investigation

Gehrke

Hartjen

Smeets

et al. 2021

IJMS

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Encouraging clinical results were reported on a novel cone-in-cone coupling for the fixation of dental implant-supported crowns (Acuris, Dentsply Sirona Implants, Mölndal, Sweden). However, the presence or absence of a microgap and a potential bacterial leakage at the conometric joint has not yet been investigated. A misfit and a resulting gap between the conometric components could potentially serve as a bacterial reservoir that promotes plaque formation, which in turn may lead to inflammation of the peri-implant tissues. Thus, a two-fold study set-up was designed in order to evaluate the bidirectional translocation of bacteria along conometrically seated single crowns. On conometric abutments filled with a culture suspension of anaerobic bacteria, the corresponding titanium nitride-coated (TiN) caps were fixed by friction. Each system was sterilized and immersed in culture medium to provide an optimal environment for microbial growth. Positive and negative controls were prepared. Specimens were stored in an anaerobic workstation, and total and viable bacterial counts were determined. Every 48 h, samples were taken from the reaction tubes to inoculate blood agar plates and to isolate bacterial DNA for quantification using qrt-PCR. In addition, one Acuris test system was subjected to scanning electron microscopy (SEM) to evaluate the precision of fit of the conometric coupling and marginal crown opening. Throughout the observational period of one week, blood agar plates of the specimens showed no viable bacterial growth. qrt-PCR, likewise, yielded a result approaching zero with an amount of about 0.53 × 10−4 µg/mL DNA. While the luting gap/marginal opening between the TiN-cap and the ceramic crown was within the clinically acceptable range, the SEM analysis failed to identify a measurable microgap at the cone-in-cone junction. Within the limits of the in-vitro study it can be concluded that the Acuris conometric interface does not allow for bacterial translocation under non-dynamic loading conditions.

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Fixed Conometric Retention with CAD/CAM Conic Coupling Abutments and Prefabricated Syncone Caps: A Case Series

Cited by 11 publications

References 0 publications

The Conometric Concept: A Two‐Year Follow‐Up of Fixed Partial CEREC Restorations Supported By Cone‐In‐Cone Abutments

The Conometric Concept: A Two‐Year Follow‐Up of Fixed Partial CEREC Restorations Supported By Cone‐In‐Cone Abutments

Evaluation of clinical and radiographic outcome of friction fit conical abutment system in implant-supported dental prostheses: An in vivo study

Marginal Adaptation and Microbial Leakage at Conometric Prosthetic Connections for Implant-Supported Single Crowns: An In Vitro Investigation

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