Obtaining reliable intraoral digital scans for an implant-supported complete-arch prosthesis: A dental technique

Iturrate, Mikel; Mínguez, Rikardo; Pradíes, Guillermo

doi:10.1016/j.prosdent.2018.03.008

Cited by 36 publications

(16 citation statements)

References 20 publications

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“…Despite that the study generally indicated a promising accuracy outcome for implant digital impression, the applied IOS systems may still have limitations that can affect its general use. This involves a lack of customization and recording of the soft tissue profile during the impression procedure [9][10][11]. Some reports mentioned methods to overcome this problem [9][10][11], which require modification of the clinical technique.…”

Section: Discussionmentioning

confidence: 99%

“…This involves a lack of customization and recording of the soft tissue profile during the impression procedure [9][10][11]. Some reports mentioned methods to overcome this problem [9][10][11], which require modification of the clinical technique. It is likely that the accuracy of digital impressions in a clinical set-up is inferior to a laboratory experiment [24].…”

Section: Discussionmentioning

confidence: 99%

“…Recently, with the advancement of digital technologies, digital impression became a feasible alternative to record implants position. With this approach, a scan body is attached on the implant, and an intraoral scanner (IOS) is used to record the scan body position in addition to the adjacent teeth and the surrounding tissue [9][10][11]. Subsequently, a virtual image of the scan body and the surrounding structure is generated.…”

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confidence: 99%

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Accuracy of digital impressions versus conventional impressions for 2 implants: an in vitro study evaluating the effect of implant angulation

Abduo

Palamara

2021

Int J Implant Dent

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Background Accurate implant impression is an essential requirement for the fabrication of implant prosthesis. This in vitro study evaluated the accuracy of digital impressions by intraoral scanner (IOS) systems in comparison to conventional impressions for recording the position of 2 parallel implants and 2 divergent implants. Materials and methods In vitro 3-unit prosthesis master models with 2 tissue level implants were fabricated; one model had parallel implants, and the other model had one 15° tilted implant. The conventional open-tray impressions were obtained with non-splinted (NSP) and splinted (SP) impression copings. Trios 4 (TS), Medit i500 (MT), and True Definition (TD) were used to make digital impressions with scan bodies. A total of 10 impressions were obtained with every technique. The virtual test images of the conventional and digital impressions were converted to 2 virtual implant images. For each group, trueness, precision, inter-implant distance deviation, and angle deviation were measured. Results There was a general tendency for digital impressions to provide a more accurate outcome for trueness, precision, and angle deviation. The 2 conventional impressions showed similar accuracy, except for the angle deviation, where the NSP was significantly inferior than SP (p < 0.01) for the divergent implants model. The TD was generally the least accurate among all the IOS systems, especially for the inter-implant distance deviation (p < 0.05). Conclusions Within the limitations of the laboratory set-up of the present study and the limited clinical resemblance, the digital impressions appeared to have sufficient accuracy for 2 implants and were least affected by the presence of angle between implants. The most inferior outcome was observed for the NSP technique.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Accuracy of digital impressions versus conventional impressions for 2 implants: an in vitro study evaluating the effect of implant angulation

Abduo

Palamara

2021

Int J Implant Dent

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“…First, the stent was useful for taking an accurate intraoral scan, as it is well documented that edentulous arches represent critical clinical situations for intraoral scanning. The use of an auxiliary stent in order to increase the accuracy of intraoral scans has been described and tested in previous papers [24,25].…”

Section: Discussionmentioning

confidence: 99%

Full Digital Workflow for the Treatment of an Edentulous Patient with Guided Surgery, Immediate Loading and 3D-Printed Hybrid Prosthesis: The BARI Technique 2.0. A Case Report

Venezia

Torsello²,

Santomauro

et al. 2019

IJERPH

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Purpose: To describe a technique intended to transfer of the intermaxillary and occlusal relationships in a fully digital environment from a complete denture to an implant-supported 3D-printed hybrid prosthesis (an acrylic resin complete fixed dental prosthesis supported by implants). Methods: In edentulous cases, the physiological mandibular position should be determined before the immediate loading procedures. In some cases, the use of interim removable prostheses for a few weeks could be useful to test the new occlusion in centric relation and to verify the prosthetic project. When the correct intermaxillary relationships are achieved, it is difficult to transfer them from the provisional to the final prostheses, as impressions or scans of edentulous arches do not have reference points for intermaxillary records. This paper presents a complex case and the technique used to transfer information from a complete denture to an implant-supported prosthesis with a digital workflow. A prosthetic stent has been used to scan the edentulous mandibular arch and to record the intermaxillary relation. Results: The delivery of the hybrid implant-supported prostheses was carried out with no problems and minimal occlusal adjustments. The patient was extremely satisfied with the treatment and the situation remained stable at the 1-year follow up. Conclusions: The approach described in the present article predictably maintains prosthetic information and allows the delivery of a final implant-supported restoration with the same occlusal relationship as the one tested with the provisional diagnostic dentures.

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“…A recent systematic review suggested that using splinted scan body could be helpful to overcome the difficulties [ 15 ]. A few innovative techniques have been introduced and tested [ 22 – 24 ]. In an in vitro study, modified scan bodies were produced and investigated [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Improved accuracy of digital implant impressions with newly designed scan bodies: an in vivo evaluation in beagle dogs

et al. 2021

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Background The accuracy of digital impressions for fully edentulous cases is currently insufficient for routinely clinical application. To overcome the challenge, a modified scan body was introduced, which demonstrated satisfactory accuracy in vitro. The aim of this study was to evaluate the accuracy of digital impressions using the modified scan bodies with extensional structure versus scan bodies without extensional structure in mandible with two implants in beagle dogs. Methods The unilateral mandibular second premolar to second molar were extracted in four beagle dogs. Twelve weeks later, two implants were placed. Five repeated digital impressions were performed with an intraoral scanner on each dog using each of the two different scan bodies: Group I—scan body without extensional structure (SB); Group II—scan body with extensional structure (SBE). The scans were exported to Standard Tessellation Language (STL) files to serve as test data. The dogs were sacrificed and the dissected mandibles were digitalized with a lab scanner to provide reference data. Linear and angular deviations were calculated in an inspection software for accuracy assessment. Statistical analysis was performed with two-way ANOVA. The level of significance was set at α = 0.05. Results For trueness assessment, the mean of absolute linear/angular deviations were 119.53 μm/0.75 degrees in Group I and 68.89 μm/0.36 degrees in Group II. SBE was more accurate than SB regarding both linear (p = 0.008) and angular (p = 0.049) deviations. For precision assessment, the mean of absolute linear/angular deviations were 63.01 μm/0.47 degrees in Group I and 38.38 μm/0.24 degrees in Group II. No significant difference was found. Conclusions The application of SBE significantly improved the trueness of digital impressions in mandible with two implants compared to SB. No significant difference was found in terms of precision.

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Obtaining reliable intraoral digital scans for an implant-supported complete-arch prosthesis: A dental technique

Cited by 36 publications

References 20 publications

Accuracy of digital impressions versus conventional impressions for 2 implants: an in vitro study evaluating the effect of implant angulation

Accuracy of digital impressions versus conventional impressions for 2 implants: an in vitro study evaluating the effect of implant angulation

Full Digital Workflow for the Treatment of an Edentulous Patient with Guided Surgery, Immediate Loading and 3D-Printed Hybrid Prosthesis: The BARI Technique 2.0. A Case Report

Improved accuracy of digital implant impressions with newly designed scan bodies: an in vivo evaluation in beagle dogs

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