Stefan Lettner
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View article: Anterior and Posterior Occlusal Plane Inclinations Differ Between Class II and Class III Mixed Dentitions—A Retrospective Cross-Sectional Study of a Morphological Characteristic
Anterior and Posterior Occlusal Plane Inclinations Differ Between Class II and Class III Mixed Dentitions—A Retrospective Cross-Sectional Study of a Morphological Characteristic Open
Background: To investigate if the sagittal inclinations of anterior occlusal plane (AOP) and posterior occlusal plane (POP) differ between skeletal classes II and III in the mixed dentition period. Methods: Retrospective analysis of cross-…
View article: Sexual Dimorphism of the Lateral Angle of the Petrous Bone in Children: Growth Patterns and the Influence of Cranial Width
Sexual Dimorphism of the Lateral Angle of the Petrous Bone in Children: Growth Patterns and the Influence of Cranial Width Open
Background: The lateral angle of the internal acoustic meatus of the petrous bone is a sexually dimorphic feature used for sex determination, particularly in fragmented or cremated remains. However, studies show conflicting results regardi…
View article: Sexual Dimorphism of the Lateral Angle of the Petrous Bone in Children: Growth Patterns and the Influence of Cranial Width
Sexual Dimorphism of the Lateral Angle of the Petrous Bone in Children: Growth Patterns and the Influence of Cranial Width Open
Background: The lateral angle of the internal acoustic meatus of the petrous bone is a sexually dimorphic feature used for sex determination, particularly in fragmented or cremated remains. However, studies show conflicting results regardi…
View article: Adjunctive low‐level laser therapy in periodontal treatment – A randomized clinical split-mouth trial
Adjunctive low‐level laser therapy in periodontal treatment – A randomized clinical split-mouth trial Open
Background Low‐level laser therapy (LLLT) has been shown to exert biostimulatory effects, including increased cell proliferation and accelerated wound healing. Hence, the use of LLLT as an adjunct to scaling and root planing (SRP) for impr…
View article: MicroCT-based dental age estimation: Method comparison of the London Atlas and regression equations for deciduous and permanent teeth applied on central European infants of the 19th century
MicroCT-based dental age estimation: Method comparison of the London Atlas and regression equations for deciduous and permanent teeth applied on central European infants of the 19th century Open
View article: A comparative study of digital and conventional occlusal indicators: accuracy and reliability of the T-Scan Novus, wax occlusogram, and articulating silk in clinical application
A comparative study of digital and conventional occlusal indicators: accuracy and reliability of the T-Scan Novus, wax occlusogram, and articulating silk in clinical application Open
Articulating silk and wax occlusogram, register a summation of contacts including premature contacts enabling a more comprehensive occlusal diagnosis. In contrast, the T-Scan may be preferred when the identification of force distribution i…
View article: Prevalence and characteristics of and risk factors for impacted teeth with ankylosis and replacement resorption – a retrospective, 3D-radiographic assessment
Prevalence and characteristics of and risk factors for impacted teeth with ankylosis and replacement resorption – a retrospective, 3D-radiographic assessment Open
View article: Do strength of zirconia-abutment-interfaces depend on cement, zirconia type and titanium abutment dimensions?
Do strength of zirconia-abutment-interfaces depend on cement, zirconia type and titanium abutment dimensions? Open
This study contributes insights into the complex interplay of factors influencing the zirconia-abutment-interface. The results provide a foundation for refining clinical approaches, emphasizing the importance of chimney height and zirconia…
View article: Transfer accuracy of 3D printed versus CAD/CAM milled surgical guides for temporary orthodontic implants: A preclinical micro CT study
Transfer accuracy of 3D printed versus CAD/CAM milled surgical guides for temporary orthodontic implants: A preclinical micro CT study Open
Digital planning of orthodontic temporary implants combines clinical predictability and the safety of surrounding tissue. Therefore, the transfer accuracy of the guides is crucial. This preclinical study was the first to evaluate CAD/CAM m…
View article: Human versus Rat PRF on Collagen Membranes: A Pilot Study of Mineralization in Rat Calvaria Defect Model
Human versus Rat PRF on Collagen Membranes: A Pilot Study of Mineralization in Rat Calvaria Defect Model Open
Platelet-rich fibrin, the coagulated plasma fraction of blood, is commonly used to support natural healing in clinical applications. The rat calvaria defect is a standardized model to study bone regeneration. It remains, however, unclear i…
View article: Active and Passive Mineralization of Bio-Gide® Membranes in Rat Calvaria Defects
Active and Passive Mineralization of Bio-Gide® Membranes in Rat Calvaria Defects Open
Bio-Gide® is a collagen membrane routinely used in guided bone regeneration. Recent studies have shown that this collagen membrane has osteoconductive properties, meaning that it can support the growth of new bone. However, it has also bee…
View article: Clinical and Radiographic Outcomes of Single Implant-Supported Zirconia Crowns Following a Digital and Conventional Workflow: Four-Year Follow-Up of a Randomized Controlled Clinical Trial
Clinical and Radiographic Outcomes of Single Implant-Supported Zirconia Crowns Following a Digital and Conventional Workflow: Four-Year Follow-Up of a Randomized Controlled Clinical Trial Open
Purpose: This study aimed to compare the clinical and radiographic outcomes of single posterior screw-retained monolithic implant crowns following a digital and conventional workflow and to report on the survival/complication rate after a …
View article: 3D printed indirect bonding trays: Transfer accuracy of hard versus soft resin material in a prospective, randomized, single-blinded clinical study
3D printed indirect bonding trays: Transfer accuracy of hard versus soft resin material in a prospective, randomized, single-blinded clinical study Open
CAD/CAM technology for indirect bracket bonding has been proven reliable in a randomized clinical trial. Both hard and soft resin showed a low rate of immediate loss compared to the current literature. Soft resin was more favorable than ha…
View article: CAD/CAM indirect bonding trays using hard versus soft resin material: a single-blinded in vitro study
CAD/CAM indirect bonding trays using hard versus soft resin material: a single-blinded in vitro study Open
The findings indicate that indirect bonding using CAD/CAM is an accurate procedure in the laboratory setting. Soft resins are considered favorable for loss rate and useability.
View article: Impact of a Static Magnetic Field on Early Osseointegration: A Pilot Study in Canines
Impact of a Static Magnetic Field on Early Osseointegration: A Pilot Study in Canines Open
A static magnetic field generated by neodymium–iron–boron (NdFeB) magnets placed in the inner cavity of dental implants can enhance bone regeneration in rabbits. It is, however, unknown whether static magnetic fields support osseointegrati…
View article: Comparison of Virtual Intersection and Occlusal Contacts between Intraoral and Laboratory Scans: An In-Vivo Study
Comparison of Virtual Intersection and Occlusal Contacts between Intraoral and Laboratory Scans: An In-Vivo Study Open
Background. The inaccurate maxillomandibular relationship of virtual casts following alignment by the vestibular scan may result in intersection (intermesh penetration) between opposing dental arch surfaces. Intersection occurs at short in…
View article: MicroCT Based Dental Age Estimation: Method Comparison of the London Atlas and Regression Equations for Deciduous and Permanent Teeth Applied on Central-European Infants of the 19th Century
MicroCT Based Dental Age Estimation: Method Comparison of the London Atlas and Regression Equations for Deciduous and Permanent Teeth Applied on Central-European Infants of the 19th Century Open
View article: Prevalence and Patterns of Traumatic Dental Injuries in the Permanent Dentition: A Three-Year Retrospective Overview Study at the University Dental Clinic of Vienna
Prevalence and Patterns of Traumatic Dental Injuries in the Permanent Dentition: A Three-Year Retrospective Overview Study at the University Dental Clinic of Vienna Open
The aim of this study was to retrospectively analyze the prevalence and patterns of traumatic dental injuries (TDIs) in permanent teeth at the University Dental Clinic of Vienna and examine influential variables. The study included all pat…
View article: <scp>FasL</scp> is a catabolic factor in alveolar bone homeostasis
<span>FasL</span> is a catabolic factor in alveolar bone homeostasis Open
Aim Fas ligand (FasL) belongs to the tumour necrosis factor superfamily regulating bone turnover, inflammation, and apoptosis. The appendicular and axial skeleton phenotype of mature Fasl gld mice has been reported. The impact of FasL on t…
View article: Should statistical analysis of bond-strength data include or exclude cohesive failures?
Should statistical analysis of bond-strength data include or exclude cohesive failures? Open
After exclusion of cases with cohesive failures OBXTR adhesive fell behind other materials in the sequence of average shear strengths. This did not reflect the actual performance of the material. Therefore, in statistical analysis we do no…
View article: Static mandibular condyle positions studied by MRI and condylar position indicator
Static mandibular condyle positions studied by MRI and condylar position indicator Open
We compared mandibular condyle positions as determined by magnetic resonance imaging (MRI) and a mechanical device, the condylar position indicator (CPI). Both methods assessed 3 mandibular positions in 10 asymptomatic males and 10 asympto…
View article: Bone Graft Packing and Its Association with Bone Regeneration in Maxillary Sinus Floor Augmentations: Histomorphometric Analysis of Human Biopsies
Bone Graft Packing and Its Association with Bone Regeneration in Maxillary Sinus Floor Augmentations: Histomorphometric Analysis of Human Biopsies Open
Research in maxillary sinus floor augmentation (MSFA) focussed on the optimisation of microstructural parameters such as microporosity and particle size of bone substitute particles (BS). However, little is known about the impact of BS pac…
View article: Alternatives to amalgam: Is pretreatment necessary for effective bonding to dentin?
Alternatives to amalgam: Is pretreatment necessary for effective bonding to dentin? Open
View article: Retrospective Evaluation of Implants Placed in Iliac Crest Autografts and Pristine Bone
Retrospective Evaluation of Implants Placed in Iliac Crest Autografts and Pristine Bone Open
Objective: Iliac crest autografts can compensate for severe mandibular atrophy before implant placement. However, the implant success in the augmented bone is not entirely predictable. Here we performed a retrospective cohort study to dete…
View article: Prevalence and patterns of traumatic dental injuries in primary teeth: a 3-year retrospective overview study in Vienna
Prevalence and patterns of traumatic dental injuries in primary teeth: a 3-year retrospective overview study in Vienna Open
Objectives The aim of this study was to retrospectively identify the prevalence, patterns, and accident types of traumatic dental injuries (TDIs) in children with primary teeth in Vienna, Austria. Material and methods The investigation was…
View article: A volumetric prediction model for postoperative cyst shrinkage
A volumetric prediction model for postoperative cyst shrinkage Open
View article: Short-term results of the combined application of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser and erbium-doped yttrium aluminum garnet (Er:YAG) laser in the treatment of periodontal disease: a randomized controlled trial
Short-term results of the combined application of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser and erbium-doped yttrium aluminum garnet (Er:YAG) laser in the treatment of periodontal disease: a randomized controlled trial Open
Objectives Nd:YAG and Er:YAG lasers have been previously used as an adjunct in periodontal therapy. The aim of this single-blinded randomized controlled clinical trial was to evaluate the efficacy of a combined application of Nd:YAG and Er…
View article: Optimizing the fitting-surface preparation of zirconia restorations for bonding to dentin
Optimizing the fitting-surface preparation of zirconia restorations for bonding to dentin Open
Pretreatment of zirconia substrates using air abrasion and/or ceramic primers increased the SBS of the zirconia cement interface. For all tested glaze-on treatments, in our experimental setting no effect was observed.
View article: Is MRI a viable alternative to CT/CBCT to identify the course of the inferior alveolar nerve in relation to the roots of the third molars?
Is MRI a viable alternative to CT/CBCT to identify the course of the inferior alveolar nerve in relation to the roots of the third molars? Open
Objectives To assess the reliability of judging the spatial relation between the inferior alveolar nerve (IAN) and mandibular third molar (MTM) based on MRI or CT/CBCT images. Methods Altogether, CT/CBCT and MRI images of 87 MTMs were exam…
View article: Pursue today and assess tomorrow - how students’ subjective perceptions influence their preference for self- and peer assessments
Pursue today and assess tomorrow - how students’ subjective perceptions influence their preference for self- and peer assessments Open