Vygandas Rutkunas

Vygandas Rutkunas
Vilnius University · Institute of Odontology

Professor

About

55
Publications
12,248
Reads
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931
Citations
Introduction
Leader of the DIGITORR (Digital Oral Rehabilitation Research) team, focusing on validation of the digital workflow in prosthodontics and implant dentistry, 3D printed bone scaffold, bruxism monitoring etc. President of Lithuanian Society of Prosthodontics. Board member of the European Prosthodontic Association (EPA), Digital Dentistry Society (DDS). Founder of the dental clinic ProDentum specializing in digital dentistry and implantology, as well as DIGITORUM lab and education center.
Additional affiliations
September 2019 - present
Vilnius University
Position
  • Professor (Full)
September 2009 - September 2019
Vilnius University
Position
  • Professor (Associate)
September 2005 - present
Vilnius University, DIGITORR team, ProDentum clinic
Position
  • Professor (Full)

Publications

Publications (55)
Article
Statement of problem Little is known about whether the misfit level of implant-supported screw-retained prostheses can be tolerated when different combinations of engaging and nonengaging titanium bases are used. Purpose The purpose of this in vitro study was to simulate prosthetic workflow distortions (horizontal and vertical) and to evaluate the...
Article
Objectives . To evaluate deviation propagation from data acquisition with an intraoral scanner to additive manufacturing of complete-arch dentate models. Methods . A reference (Ref) mandibular dentate model having 5 precision spheres was scanned with a coordinate measurement machine equipped with a laser scanning head (ALTERA; Nikon) producing a N...
Article
Background aims To facilitate artificial bone construct integration into a patient's body, scaffolds are enriched with different biologically active molecules. Among various scaffold decoration techniques, coating surfaces with cell-derived extracellular matrix (ECM) is a rapidly growing field of research. In this study, for the first time, this te...
Article
Purpose: Additive manufacturing (AM) in prosthodontics is used as an alternative to casting or milling. Various techniques and materials are available for the additive manufacturing of the fixed and removable tooth-supported restorations, but there is a lack of evidence on the accuracy of AM fixed implant-supported prostheses. Recent studies inves...
Article
Statement of problem The effect of additional reference objects on the accuracy of different intraoral scanners for partially and completely edentulous patients has not been investigated sufficiently. Purpose The purpose of this in vitro study was to evaluate the effect of an additional reference object in the form of additional artificial landmar...
Article
Objectives: The main objective of the study was to compare the accuracy of full-arch digital implant impressions for fixed dental prosthesis under in vitro and in vivo conditions. Material and methods: Eight patients (5 women and 3 men) with at least one edentulous arch and with 4-6 osseointegrated implants participated in this study. For each e...
Article
Purpose: To assess the fit and cement gap of fixed partial dentures supported by two implants made using conventional and digital workflows. Materials and methods: Patients requiring fixed partial dentures supported by two implants were included in the study. Forty-eight zirconia fixed partial denture bars supported by two implants (AnyOne, Mega...
Data
Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) for Clinical and Research Applications: Lithuanian version / Smilkininio apatinio žandikaulio sąnario sutrikimų diagnostikos kriterijai: vertinimo instrumentai
Article
Full-text available
The demand for bone grafting procedures in various fields of medicine is increasing. Existing substitutes in clinical practice do not meet all the criteria required for an ideal bone scaffold, so new materials are being sought. This study evaluated bone regeneration using a critical-size Wistar rat’s calvarial defect model. 12 male and 12 female ra...
Article
Full-text available
The better understanding of the clinically important behavioral features of new instrument systems has an important significance for the clinical endodontics. This study aimed to investigate the shaping and centering ability as well as cyclic fatigue resistance of HyFlex CM (CM), HyFlex EDM (EDM) and EdgeFile (EF) thermally treated nickel–titanium...
Article
Full-text available
Dental implant abutment and prosthetic materials, their surface treatment, and cleaning modalities are important factors for the formation of a peri-implant soft tissue seal and long-term stability of bone around the implant. This study aimed to investigate the influence of a polymeric material surface cleaning method on the surface roughness, wate...
Article
Full-text available
Background: The literature has not yet validated the use of intraoral scanners (IOSs) for full-arch (FA) implant impression. Hence, the aim of this in vitro study was to assess and compare the trueness of 12 different IOSs in FA implant impression. Methods: A stone-cast model of a totally edentulous maxilla with 6 implant analogues and scanbodie...
Article
The aim of this study was to compare the clinical accuracy of digital and conventional dental implant impressions. Two types of implant impressions were made for each case, namely a conventional open-tray impression and a digital implant impression (DII) using a Trios IOS. Master casts were scanned using a D800 laboratory scanner and STL files were...
Chapter
Dental technologies are undergoing constant development influencing current treatment modalities and founding a basis for the new diagnostic, treatment, and follow‐up concepts. The digital workflow can cover production of all types of indirect restorations from partial crowns to removable dentures. Treatment planning is of foremost importance for t...
Article
3D printing of polylactic acid (PLA) and hydroxyapatite (HA) or bioglass (BG) bioceramics composites is the most promising technique for artificial bone construction. However, HA and BG have different chemical composition as well as different bone regeneration inducing mechanisms. Thus, it is important to compare differentiation processes induced b...
Article
Full-text available
Background: Long-term success of implant-supported restorations can be affected by the accuracy of the prosthodontic workflow which may differ between conventional and digital techniques. Purpose: The purpose was to compare the fit of two-implant-supported restorations, fabricated using conventional and digital workflows and to assess the influe...
Article
Introduction: In complex clinical conditions when physiological bone regeneration is insufficient, there is a need to develop synthetic material-based scaffolds. The morphologic properties of porous scaffolds are of crucial importance. The dimensional accuracy of 3D printed scaffolds can be affected by a variety of factors. Materials and methods:...
Article
Full-text available
Purpose: The newest technologies for digital implant impression (DII) taking are developing rapidly and showing acceptable clinical results. However, scientific literature is lacking data from clinical studies about the accuracy of DII. The aim of this study was to compare digital and conventional dental implant impressions (CII) in a clinical env...
Article
Statement of problem: Whether intraoral digital scanners with an integrated shade-taking function can substitute for colorimeters, spectrophotometers, or the visual method to reduce working time is unclear. Purpose: The purpose of this clinical study was to evaluate the accuracy of the measurement of tooth shade obtained with an intraoral digita...
Article
Topography of the scaffold is one of the most important factors defining the quality of artificial bone. However, the production of precise micro‐ and nano‐structured scaffolds, which is known to enhance osteogenic differentiation, is expensive and time‐consuming. Meanwhile, little is known about macro‐patterns (larger than cell diameter) effect on...
Article
Full-text available
The study aimed to 1) evaluate the cytotoxicity of luting cements: Hoffmann's Zinc Phosphate (Hoffmann's ZP), GC Fuji Plus Resin Modified Glass Ionomer (Fuji Plus RMGI) and 3M ESPE RelyX Unicem Resin Cement (RelyX Unicem RC) and 2) test if pre-washing reduces the cements' cytotoxicity. In vitro human gingival fibroblast (HGF) culture model was chos...
Article
The biocompatibility of dental implant abutment materials depends on numerous factors including the nature of the material, its chemical composition, roughness, texture, hydrophilicity and surface charge. The aim of the present study was to compare the viability and adhesion strength of human gingival fibroblasts (HGFs) grown on several dental mate...
Article
Full-text available
Objective: The aim of this study is to investigate the multifactorial etiology of mandibular tori analyzing the influence of genetics, occlusal overload, various clinical variables and their interactions. Methods: Overall, plaster casts of 162 twins (81 twin pairs) were analyzed for the presence or absence of mandibular tori. Atypical wear facet...
Article
Full-text available
A 3D printing fused filament fabrication (FFF) approach has been implemented for the creation of microstructures having an internal 3D microstructure geometry. These objects were produced without any sacrificial structures or additional support materials, just by precisely tuning the nozzle heating, fan cooling and translation velocity parameters....
Article
Surface modification, as a means of enhancing soft tissue integration in titanium would have significant advantages including less marginal bone resorption, predictable esthetic outcome, improved soft tissue stability and seal against bacterial leakage. The aim of this study was to evaluate the effects of laser-roughened titanium surfaces on human...
Article
We present a novel approach to manufacturing 3D microstructured composite scaffolds for tissue engineering applications. A thermal extrusion 3D printer - a simple, low-cost tabletop device enabling rapid materialization of CAD models in plastics - was used to produce cm-scale microporous scaffolds out of polylactic acid (PLA). The fabricated object...
Article
Transferring the implant position from the mouth to the definitive cast is one of the most critical steps in implant prosthodontics. To achieve a passive fit of the prosthesis, an accurate implant impression is crucial because discrepancies can induce both biologic and technical complications. Analysis of available research data suggests that a dir...
Conference Paper
form only given. We present direct laser fabrication of 3D microstructured scaffolds consisting out of a few polymeric materials owning different biological properties. Direct laser writing in photo/thermo-sensitive materials using ultra short light pulses of high repetition laser provides unmatched flexibility in controllable 3D microstructuring i...
Conference Paper
Full-text available
Objectives: To evaluate soft tissue attachment to dental implant abutment surface combining different surface modification strategies including surface alteration by mechanical roughening, laser irradiation as well as by immobilization of bioactive materials. Methods: Human gingival subepithelial tissue was obtained from a healthy patient. Cell...
Article
Full-text available
The aim of this preliminary laboratory study was to evaluate the effects of 5- and 25-degree implant angulations in simulated clinical casts on an impression's accuracy when using different impression materials and tray selections. A convenience sample of each implant angulation group was selected for both open and closed trays in combination with...
Article
Full-text available
The aim of this study was to evaluate wear effects on overdenture resilient attachments. Six commercially available attachments were investigated: ERA orange and white (EO and EW), Locator pink, white and blue (LRP, LRW and LRB) and OP anchor (OP). Five specimens were used for wear simulation while other two specimens served as controls. Fifteen th...
Article
Full-text available
To assess qualitative and quantitative cytotoxicity effect on permanent prosthetic materials to human gingival fibroblasts. Human gingival tissues were collected (with informed consent) from patients undergoing periodontal surgical procedures and fibroblasts were cultured in vitro. Cell type was determined by performing proteomic analysis. Selected...
Article
Full-text available
The main objective was to investigate the effects of different polishing techniques on the color stability of provisional prosthetic materials upon exposure to different staining agents by mimicking the oral environment in vitro. Fifty-six cylindrical specimens were prepared for each type of material: bis-acryl and light-polymerized composite resin...
Article
Full-text available
Unlabelled: OBJECTIVES. To investigate repolishing effect of stained provisional prosthetic materials in vitro. METHODS. Thirty two cylindrical specimens (10 x 2 mm) were prepared for each of light-polymerized composites (Revotek LC, Rx-Create), bis-acryl composites (Structur Premium, Protemp Garant3, Luxatemp Fluorescence), methyl-methacrylate (U...
Article
Full-text available
Implant loading time is considered to influence the treatment outcomes. Number of experimental studies have shown that implant loading up to 3 months can produce equally satisfactory results. However, research results in this area are not consistent. The purpose of the study was to investigate the influence of conventional and early loading of two-...
Article
Full-text available
The aims of the presented study were to define the fracture rate of implant-supported metal-ceramic restorations delivered in private practice, and to identify if a restoration's contact during eccentric mandible movements has any influence on ceramic fracture rates. Material and Within the period from 2005 to 2008, 251 patients, namely 105 men (42...
Article
Full-text available
A traditional concept is that apical periodontitis is the result of pathogenic effects of the microorganisms colonizing the root canal system and the response of the host defence system. The composition of the microflora of root canals differs in primary endodontic treatment and retreatment cases. Persistent disease in the periapical region after r...
Article
Full-text available
Research data regarding maxillary complete denture outcome with two-implant supported mandibular overdentures are not consistent. Considering multiple publications on implant supported mandibular overdentures, it was decided to summarize currently present evidence on the maxillary complete dentures opposed by implant-supported mandibular overdentur...
Article
Unlabelled: The aims of this study were: (i) to evaluate and compare retention of two-teeth (implant) supported mandibular overdenture with either stud or magnetic attachments during linear (axial) and rotational (paraxial) dislodgements; (ii) to compare retentive properties before and after wear simulation. The test group consisted of five magnet...
Article
Full-text available
Objectives: To evaluate fatigue of stud (ERA Overdenture (orange and white), Locator Root (pink) and OP anchor # 4) and magnetic (Magfit EX600W) attachments by measuring maximum retentive force. To compare retentive force of overdenture attachments after their reach stable retention. To determine minimum number of cycles required to reach stable r...

Projects

Projects (3)
Project
Translation and establishment of cultural equivalency of DC/TMD in Lithuania.
Project
Considering all clinical situations, there is a high demand for bone augmentation procedures and bone substitute materials. 3D structured and individually fabricated bone scaffolds are promising treatment strategy, which would allow to shorten the time and lower the extent of the surgery for larger part of population demanding bone augmentation procedures.
Project
Using in-vitro and in-vivo models, to evaluate the accuracy of implant-supported in these regards: 1) Accuracy of digital implant impressions (distance, angulation, rotation, vertical shift): comparison between conventional and digital techniques. 2) Accuracy of bite registration for implant cases using intraoral scanners (IOS) 3) To compare accuracy of implant supported restorations fabricated from conventional and digital impressions.