Dental Implant and Natural Tooth Micro-Movements during Mastication—In Vivo Study with 3D VIC Method

Száva, Dániel Tamás; Száva, Andrea; Szavá, Ioan; Gálfi, Botond; Vlase, Sorin

doi:10.3390/jpm12101690

Cited by 6 publications

(6 citation statements)

References 20 publications

(19 reference statements)

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“…Original studies [17] using the video image correlation method were conducted to determine the micromovements of the dental implant and the bone base, and they show that there are significant differences between these two objects. The linear type of displacement of a dental implant refers to the linear modulus of elasticity of bone tissue under regular occlusion forces.…”

Section: Discussionmentioning

confidence: 99%

Primary and Post-Osseointegration Stability of Short (Ultra-Short) Implants on Edentulous Atrophied Distal Segments of the Mandible - An Indicator of Immediate or Delayed Load

Oshurko,

Oliinyk,

Kuzniak

et al. 2024

Clin. and prev. med.

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Introduction. The issue of determining the possibility of immediate or long-term load on the selected type of implants, which will ensure the predictable result of their long-term functionality, remains an ongoing discussion. The results of the resonance frequency analysis, which perfectly characterize the stability of short and ultrashort implants at all stages of their osseointegration and post-osseointegration periods, can serve as such an indicator basis. Aim. To analyze the primary and post-osseointegration stability of short (ultra-short) implants placed by the methods at the level of the cortical bone layer and subcortically in case of bone atrophy caused by acquired final dentition defects. Materials and methods. The primary and post-osseointegration stability of thirty-nine dental short (h = 6.5 mm X b = 4.0 mm – 20 pieces) and ultra-short (h = 5.5 mm X b = 4.0 mm – 19 pieces) implants placed on the edentulous distal segments of the human mandible was studied. According to the clinical assessment that met the aim and objectives of this study, all patients were divided into four study groups: the first group consisted of patients with a preserved dentition who did not require dental implantation; the second group – 25-45 years old, the third group – 46-60 years old, and the fourth group – ≥ 61 years old. Using the resonance frequency analysis (RFA) method by Penguin Instruments, the results were interpreted in declarative units of measurement – the implant stability quotient (ISQ). Results. The installed short (ultrashort) implants, according to the methodology by the level of the cortical layer of bone tissue, are characterized by their high primary stability by anti-rotational force: in the second group of the study (25-45 years old) with a mean number (M) of 87.0 and an error of the mean (± m) of ± 2.3 ISQ; in the third group (46-60 years old) – 76.4 ± 3.0 ISQ; in the fourth group (persons ≥ 61 years old) – 69.8 ± 4.8 ISQ. Low values of primary stability were obtained in implants installed by the subcortical implantation technique in the second age group of the study and amounted to 59.6 ± 2.7 ISQ with a slight increase to 66.0 ± 4.1 ISQ in the third group and 71.7 ± 4.2 ISQ in the fourth group of the study, which do not guarantee the prognosis of functional redistribution of the supra occlusion immediate load on the biological basis, with further preservation of the course of normal physiological processes in the bone tissue around the implanted implants. Conclusions. Rehabilitation of patients with bone atrophy caused by the loss of the masticatory group of teeth is possible using short (h = 6.5-6.0 mm) and ultra-short (h = 5.5 mm) implants, with clinical justification for the choice of methods of immediate or post-osseointegration load, with a detailed resonance frequency analysis as a priority and reliable method – an effective indicator of their stability, at all stages of clinical rehabilitation of patients.

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Section: Discussionmentioning

confidence: 99%

Primary and Post-Osseointegration Stability of Short (Ultra-Short) Implants on Edentulous Atrophied Distal Segments of the Mandible - An Indicator of Immediate or Delayed Load

Oshurko,

Oliinyk,

Kuzniak

et al. 2024

Clin. and prev. med.

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“…From a functional point of view, the calculated value is very small, being below the acceptable ones, presented in the specialized literature. [ 8 ] Figure 6B shows the state of shear stresses in the XY plane. Calculated stress value is SXY = 0.32 E7 N m −2 , much lower than Young modulus that means an elastic behavior, without dangerous problems for the composite structure.…”

Section: Finite Element Modeling (Fem) Of the Biocomposite Structurementioning

confidence: 99%

Finite Element Modeling of a Biological Composite Structure Used in Orthodontic Fixed Appliances

Milicescu,

Nitoi,

Mihai

et al. 2023

Macromolecular Symposia

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Composite structures currently represent combinations of materials from the most different structures, chemical compositions, or geometric shapes. There is no scientific or technical field in which these materials, due to their special characteristic properties, are not present. Most of the time it is found that they cannot even be replaced. In this sense, the study presented in this work refers to the behavior of a semibiological structure. This structure is found in the field of dentistry when using fixed dental appliances. The composite structure refers to the metal bracket that is fixed by a bonding and a resin layers that are considered as adhesives to the outer surface of the tooth, i.e., to the enamel that is a biological material. In order to make a prediction of the behavior of structure during the mastication process from the point of view of the displacements and the state of tension, study starts from the practical realization of a joint by gluing the bracket on the surface of a devitalized tooth. Based on it, modeling using the finite element method allows the prediction of masticatory forces based on the analysis of stress states and displacements.

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“…This is thought to be chiefly because FISPs do not have a periodontal ligament and are prone to occlusal overloading of the opposing teeth (Park et al., 2021). Moreover, a study reported clear differences in the micro‐movement patterns between FISPs and natural teeth (Száva et al., 2022). Thus, the difference in the load‐bearing capacity of the two prostheses indicate a different distribution of mechanical forces, which may affect the residual teeth including the adjacent teeth.…”

Section: Introductionmentioning

confidence: 99%

Survival time analysis of remaining teeth following replacement of unilateral free‐end missing teeth: A comparison between fixed implant‐supported prostheses and removable partial dentures

Tsujioka,

Mameno,

Akema

et al. 2024

Clinical Oral Implants Res

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ObjectivesThis retrospective study aimed to investigate the differences in tooth loss rate between fixed implant‐supported prostheses (FISPs) and removable partial dentures (RPDs) in cases of unilateral free‐end missing teeth.Materials and MethodsThe data of 324 patients who underwent treatment with FISPs or RPDs for unilateral free‐end missing teeth and satisfied the applicable criteria, were evaluated (47 in the FISPs group and 277 in the RPDs group). After propensity score (PS) matching, which was used to extract patients with similar background factors related to prosthetic selection at baseline, survival time analyses were performed with tooth loss as the endpoint. The adjusted variables were age, sex, number of restored teeth, periodontal status, and the practicing dentist's experience in years. The remaining teeth were classified into subcategories in relation to the missing molars.ResultsOverall, 58 patients (29 in each group) selected by PS matching were evaluated in the final analysis. The total number of lost teeth was 35 (FISPs group: n = 10; RPDs group: n = 25). The mean (±SD) period to tooth loss and the 10‐year survival rates in the FISPs and RPDs groups were 51.6 (±30.1) months and 42.3 (±29.7) months, 70.5% and 16.4%, respectively. The log‐rank test showed that significantly longer survival time in FISPs compared with RPDs.ConclusionsAfter adjustments for confounding factors using PS matching, replacing unilateral free‐end missing teeth with FISPs may exhibit a lower tooth loss rate in adjacent and contralateral teeth compared to replacing with RPDs.

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Dental Implant and Natural Tooth Micro-Movements during Mastication—In Vivo Study with 3D VIC Method

Cited by 6 publications

References 20 publications

Primary and Post-Osseointegration Stability of Short (Ultra-Short) Implants on Edentulous Atrophied Distal Segments of the Mandible - An Indicator of Immediate or Delayed Load

Primary and Post-Osseointegration Stability of Short (Ultra-Short) Implants on Edentulous Atrophied Distal Segments of the Mandible - An Indicator of Immediate or Delayed Load

Finite Element Modeling of a Biological Composite Structure Used in Orthodontic Fixed Appliances

Survival time analysis of remaining teeth following replacement of unilateral free‐end missing teeth: A comparison between fixed implant‐supported prostheses and removable partial dentures

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