Polish Group Research Articles

Anglicyzmy w konfrontatywnym nauczaniu języka rosyjskiego

Russian language acquisition by Polish students is understood as effective and appropriate interaction in various conversational situations. This requires specific habits in the use of the contemporary Russian linguistic system. The use of a language can be examined in a natural communicative situation, which needs informal, spoken language. The usage of English loanwords in spoken Polish and Russian is frequent, which is why the characteristics of spoken language in contemporary spoken Russian and Polish needs to be examined. Research conducted on a group of Polish, Russian, Belorussian and Ukrainian Youtubers shows that their speech contains some specific derivatives which are characteristic of colloquial Russian and Polish. It also contains groups of English loanwords: assimilated nouns, verb and adjective derivatives with productive suffixes. The study shows that English loanword adaptation differs in Polish and Russian, which reveals system differences between two related languages. Comparison of the most productive word formation processes in Russian and Polish can help to overcome language interference and improve the teaching of Russian to Polish students in general.

God and State Above All

Abstract This article explores how politically active Polish women starting in the late nineteenth century until the start of World War II viewed themselves and their duties vis-a-vis the Polish nation. It traces the women's movement in Poland from the first calls for women's right to work, to their eventual enfranchisement under a newly independent Polish state in 1918. Challenges to women's equality took many forms: men from both sides of the political spectrum viewed women's entry into the salaried workforce and the public sphere as largely undesirable and deployed a variety of arguments to reinforce traditional gender hierarchy. Yet many educated Polish women, even from conservative, Catholic perspectives, viewed their engagement in the public sphere as necessary work for the good of the Polish nation. This article uses letters, political pamphlets, and published works to explore how modern Polish women attempted to strike a balance between breaking and preserving traditional notions of gender in order to secure new rights for themselves in a volatile political atmosphere. While Polish women's groups differed on their vision of the ideal Polish state, they generally agreed that women's roles as mothers provided the moral legitimacy required to act in the public sphere. They successfully carved a space for themselves in the new Polish state of 1918 but remained marginalized in a separate and unequal status in the interwar period.

Comparison of Two Body Wear Resistance of Novel Strength- Gradient Monolithic Zirconia with Two Different CAD/CAM Materials

Objective: Novel strength-gradient monolithic zirconia is a developed material recently introduced to the market and its mechanical properties should be investigated in vitro. The aim of the study is to compare the wear rates of three different CAD/CAM materials with a chewing simulator after one year of dynamic loading.
 Methods: 7x7x3 mm discs were prepared from lithium disilicate, strength-gradient monolithic zirconia, and zirconia-reinforced lithium silicate glass ceramic. Both groups were divided into two subgroups (n=12) as glazed and mechanically polished. 
 The samples were scanned with a laser scanner device (SD Mechatronic Laser Scanner LAS-20, Westerham, Germany) to determine the amount of wear. The samples were placed in a chewing simulator (SD Mechatronic Chewing Simulator CS-4.2, Westerham, Germany) for 240 000 cycles which is equivalent to 1 year of clinical use. After the dynamic loading in the chewing simulator, the samples were scanned again in the laser scanner, and the data was obtained. Kruskal Wallis test was used to analyze the data.
 Results: The amount of wear of each material was found to be statistically significant (p< .05). No significant differences between the polished and glazed groups of Zir and LD were found but glazed CD was significantly more wear-resistant than polished CD (p< .05). 
 Conclusions: Wear is a phenomenon that can be affected by different factors such as microstructure and surface finishing of the materials. Wear resistance should be taken into consideration when choosing a material.

Assessment of physical activity levels and back pain among poles and Portuguese in the further year of the COVID-19 pandemic - a pilot study

BackgroundThe vast majority of people have experienced the problem of back pain at least once in their lives for a variety of reasons. It is well known that regular physical activity at a moderate level has a number of health benefits regardless of age or gender with positive effects on the musculoskeletal, cardiovascular, respiratory or nervous systems improving fitness levels. During the pandemic, Poland experienced one of the longest periods of school lockdown in Europe. In Portugal, this period was considerably shorter. The aim of this study was to determine the level of physical activity and back pain as well as relationship between physical activity and back pain in a group of Polish and Portuguese students in the following year the COVID-19 pandemic.MethodsThe study was conducted via the Internet among students from Poland and Portugal (398 respondents − 229 from Poland and 169 from Portugal) in October 2022. In the pilot study, the International Physical Activity Questionnaire and The Oswestry Disability Index and Neck Disability Index questionnaires were used to assess the level of back pain.ResultsThere are no statistically significant differences in the level of physical activity and pain complaints of respondents from the two countries. At least half of the students do not report any pain complaints (median in some groups being 0). In the Portuguese men, there is a correlation between the level of physical activity and the Neck Disability Index score (p = 0.0304).ConclusionsThe following year, after the pandemic COVID-19 was declared, the prevalence of back pain among students in Poland and Portugal is still significant.

Recommendations of Polish HCV Expert Group and Polish Society of Haematologists and Transfusiologists on diagnosis and treatment of HCV-infected hemato-oncology patients

Recommendations of Polish HCV Expert Group and Polish Society of Haematologists and Transfusiologists on diagnosis and treatment of HCV-infected hemato-oncology patients

New Kids on the Democracy Block: Europeanisation of Interest Groups in Central and Eastern Europe

The 2004 EU enlargement and related Europeanisation processes supported the development of stagnated interest group systems in many ways, including with respect to the professionalisation of mainly voluntary-based organisations in Central and Eastern Europe. In the pre-membership period and initial years after joining the EU, national interest groups from Central and Eastern Europe chiefly relied on EU-level interest groups for important information, knowledge, and know-how concerning EU policymaking, whereas 20 years of membership has today established them as equal partners and co-decision-makers. The article elaborates on the Europeanisation of interest groups in the Central and Eastern Europe region from the start of the process of accession to the EU, with three case studies in focus: Lithuania, Poland, and Slovenia. The main research question is: In which different ways has the Europeanisation process influenced interest groups in the region? To address it, the article builds on Johansson and Jacobsson’s (2016) typology of the Europeanisation of interest groups. Six exploratory factors were examined in this regard: (a) contacts with EU policymakers and institutions, (b) interest in EU policymaking, (c) funding received from EU projects and programmes, (d) networking with EU umbrella organisations, (e) participation in open consultations, and (f) the relationship of the group with members. To study the effects of Europeanisation processes in selected countries, web survey data gathered from national interest groups as part of the Comparative Interest Groups Survey project were used. Our results show that interest groups from Central and Eastern Europe have become “European” in a range of ways. Regulatory and discursive Europeanisation is most typical for Polish interest groups, identity Europeanisation for Lithuanian interest groups, and financial and participatory Europeanisation for Lithuanian and Polish interest groups, while organisational Europeanisation has the strongest effect on interest groups in Slovenia.

A HIERARCHY ON NON-ARCHIMEDEAN POLISH GROUPS ADMITTING A COMPATIBLE COMPLETE LEFT-INVARIANT METRIC

Abstract In this article, we introduce a hierarchy on the class of non-archimedean Polish groups that admit a compatible complete left-invariant metric. We denote this hierarchy by $\alpha $ -CLI and L- $\alpha $ -CLI where $\alpha $ is a countable ordinal. We establish three results: (1) G is $0$ -CLI iff $G=\{1_G\}$ ; (2) G is $1$ -CLI iff G admits a compatible complete two-sided invariant metric; and (3) G is L- $\alpha $ -CLI iff G is locally $\alpha $ -CLI, i.e., G contains an open subgroup that is $\alpha $ -CLI. Subsequently, we show this hierarchy is proper by constructing non-archimedean CLI Polish groups $G_\alpha $ and $H_\alpha $ for $\alpha <\omega _1$ , such that: (1) $H_\alpha $ is $\alpha $ -CLI but not L- $\beta $ -CLI for $\beta <\alpha $ ; and (2) $G_\alpha $ is $(\alpha +1)$ -CLI but not L- $\alpha $ -CLI.

Does uterine arteries flow add value to CPR in the prediction of cesarean section for intrapartum hypoxia? - Secondary analysis of polish ratio37 group

Does uterine arteries flow add value to CPR in the prediction of cesarean section for intrapartum hypoxia? - Secondary analysis of polish ratio37 group

Impact of anterior capsule polishing on capsule opacification and capsule bend after age-related cataract surgery.

To investigate the effect of anterior capsule polishing on postoperative capsule opacification and capsular bend in patients with age-related cataract displaying normal axial length. University hospital. Prospective self-controlled trial. Patients with age-related cataracts aged 56 to 84 years displaying normal axial length were enrolled. Prior to surgery, a coin-toss method was used to randomly select one eye for intraoperative 360° anterior capsule polishing (polishing group); the contralateral eye received no treatment (control group). Capsular bend index (CBI), anterior capsule opacification (ACO), posterior capsule opacification (PCO), and anterior capsule opening area (ACOA) were recorded at 1 week, 1 month, 3 months, 6 months, and 12 months postoperatively using swept-source optical coherence tomography and slit-lamp examination. Twenty-one patients (42 eyes) were enrolled. Within-group comparisons showed that both groups had significant differences in CBI between 1 week and 1 month postoperatively, and between 6 months and 12 months postoperatively (P < .05). Between-group comparisons revealed a significant difference in CBI at 1 week postoperatively (P < .05); at 12 months postoperatively, there was a significant difference in ACOA (P < .05). There were no significant between-group differences regarding ACO or PCO at any time point (P > .05). For patients with age-related cataracts and normal axial length, 360° anterior capsule polishing can delay early capsular bag deformation without increasing the risks of ACO and PCO. This approach can also limit contraction of the anterior capsule opening.

Influencing Factors on the Quality of Lymph Node Dissection for Stage IA Non-Small Cell Lung Cancer: A Retrospective Nationwide Cohort Study.

Lymphadenectomy is an essential part of complete surgical operation for non-small cell lung cancer (NSCLC). This retrospective, multicenter cohort study aimed to identify factors that influence the lymphadenectomy quality. Data were obtained from the Polish Lung Cancer Study Group Database. The primary endpoint was lobe-specific mediastinal lymph node dissection (L-SMLND). The study included 4271 patients who underwent VATS lobectomy for stage IA NSCLC, operated between 2007 and 2022. L-SMLND was performed in 1190 patients (27.9%). The remaining 3081 patients (72.1%) did not meet the L-SMLND criteria. Multivariate logistic regression analysis showed that patients with PET-CT (OR 3.238, 95% CI: 2.315 to 4.529; p < 0.001), with larger tumors (pT1a vs. pT1b vs. pT1c) (OR 1.292; 95% CI: 1.009 to 1.653; p = 0.042), and those operated on by experienced surgeons (OR 1.959, 95% CI: 1.432 to 2.679; p < 0.001) had a higher probability of undergoing L-SMLND. The quality of lymphadenectomy decreased over time (OR 0.647, 95% CI: 0.474 to 0.884; p = 0.006). An analysis of propensity-matched groups showed that more extensive lymph node dissection was not related to in-hospital mortality, complication rates, and hospitalization duration. Actions are needed to improve the quality of lymphadenectomy for NSCLC.

Robotic surgery in endometrial cancer: first Polish experience.

In Poland, robotic surgery is nowadays perceived as a new method of surgical treatment in endometrial cancer patients. We aim to present the first Polish group of endometrial cancer patients treated using robotic surgery. The analysis was based on 79 patients with mean age of 59.72 ± 11.709 (range 27-83) years and endometrial cancer scheduled for surgical treatment. Mean BMI was 31.38 ± 8.78 (range 19.03-65.97)kg/m2. The data were collected based on a questionnaire consisting of 19 questions concerning the patient's perception of robotic surgery before the procedure. Patients with a family history of neoplastic diseases indicate precision of movements as the most important reason for choosing robotic surgery (p = 0.0035). Patients after surgery procedures in the past named shorter hospitalization as a major benefit (p = 0.0037). Patients who chose robotic surgery for financial reasons stressed the cosmetic effect as a priority (p = 0.0319). Shorter length of hospital stay, less blood loss, enlarged view, and good visualization were statistically significant reasons for choosing robotic surgery (p < 0.05). Women who consider work, good material status, and well-being as the most important aspects of their lives cited the cosmetic effect as a benefit of robotic surgery (p = 0.0029 vs. p = 0.0074 vs. p = 0.01745, respectively). In the follow-up after operations, no patients regretted choosing robotic surgery. Good visualization, precise movements, less blood loss, and cosmetic effects are the most frequent reasons for choosing robotic surgery. Even patients after other types of surgery in the past decided on robot-assisted radical hysterectomy because of the clear benefits of this approach.

Structural, point-free, non-Hausdorff topological realization of Borel groupoid actions

Abstract We extend the Becker–Kechris topological realization and change-of-topology theorems for Polish group actions in several directions. For Polish group actions, we prove a single result that implies the original Becker–Kechris theorems, as well as Sami’s and Hjorth’s sharpenings adapted levelwise to the Borel hierarchy; automatic continuity of Borel actions via homeomorphisms and the equivalence of ‘potentially open’ versus ‘orbitwise open’ Borel sets. We also characterize ‘potentially open’ n-ary relations, thus yielding a topological realization theorem for invariant Borel first-order structures. We then generalize to groupoid actions and prove a result subsuming Lupini’s Becker–Kechris-type theorems for open Polish groupoids, newly adapted to the Borel hierarchy, as well as topological realizations of actions on fiberwise topological bundles and bundles of first-order structures. Our proof method is new even in the classical case of Polish groups and is based entirely on formal algebraic properties of category quantifiers; in particular, we make no use of either metrizability or the strong Choquet game. Consequently, our proofs work equally well in the non-Hausdorff context, for open quasi-Polish groupoids and more generally in the point-free context, for open localic groupoids.

Between Enabling Law and Protecting Law – Some Remarks on the Method of Regulating the Law of Groups of Companies in Polish Commercial Companies Code

.Although the groups of companies have been an indispensable part of the modern economy for several decades, they still continue to attract unwavering attention of both practice and doctrine of corporate law. The numerous legal challenges posed by the functioning of multi-level structures, based on diverse types of dominance and dependance relations adopt different regulatory strategies manifest a universal appeal. Yet, the national legislators adopt different regulatory strategies, aimed at securing the interests of various stakeholders, including minority shareholders, dependent companies and their creditors. As a result, the contemporary discourse entails two concepts – one emphasizing the risks and responsibilities associated with it (protecting law) and the other one, supporting the creation of groups, as well as instruments for their effective management (enabling law). The aim of the article is to verify the extent to which these concepts are addressed by the most recent Polish group law regulations, viewed in a comparative context outlined by selected European jurisdictions.

Konvansiyonel, Eksiltmeli ve Eklemeli İmalat Tekniklerinde Kullanılan Geçici Kron Materyallerinin Yüzey Pürüzlülüğüne Diş Fırçalama ve Yüzey İşlemlerinin Etkisi: İn Vitro Çalışma

Background: This study aimed to compare the effect of the surface treatment and toothbrushing abrasion on the surface roughness of interim crown material specimens manufactured using conventional, subtractive, and additive processing techniques.&#x0D; Material and methods: 80 disk-shaped specimens were prepared from 4 different interim crown materials; one auto-polymerized polymethyl methacrylate resin (PMMA);(IM) and one bis-acryl composite resin;(AC) for conventional technique, one computer-aided design/computer-aided manufacturing (CAD-CAM) PMMA block;(TC) for subtractive process, one 3-dimensionally (3D) printed resin;(CB) for additive process. Specimens of each interim crown material were divided into two subgroups according to applied surface treatments; conventional polishing or surface sealant agent coupling (n=10). The surface roughness values of specimens before (Ra0) and after 10,000 cycles of toothbrushing (Ra1) were measured with a profilometer. Data were statistically analyzed.&#x0D; Results: The polished groups of all interim crown materials showed significantly higher Ra0 values compared to the sealant groups before toothbrushing (p˂0.05). While the polished IM groups exhibited the highest Ra0 value (0.44±0.08), the sealed TC groups exhibited the lowest Ra0 value (0.23±0.06). The Ra values of all material groups increased after simulated 1-year toothbrushing. While the polished IM group exhibited the highest Ra1 value (0.45±0.14), the sealed CB group had the lowest Ra1 value (0.31±0.09).&#x0D; Conclusion: It was observed that toothbrushing caused an increase in the surface roughness of all interim materials. The application of a surface sealant agent to these materials is more effective than polishing to reduce surface roughness. Sealed 3D printed resin for additive process exhibited the lowest mean roughness value after toothbrushing.&#x0D; Keywords: Additive Manufactured, Interim Crown Material, Roughness, Subtractive Manufactured, Toothbrushing Abrasion

Cushing's Disease: Long-Term Effectiveness and Safety of Osilodrostat in a Polish Group of Patients with Persistent Hypercortisolemia in the Experience of a Single Center.

Osilodrostat is a potent oral steroidogenesis inhibitor that has emerged as the new medical agent for patients with Cushing's disease (CD) requiring long-term medical therapy for hypercortisolemia control. Its efficacy and safety have been assessed in clinical trials; however, real-world evidence is still scarce. This study aimed to investigate the long-term treatment (156 weeks) clinical and biochemical effect of osilodrostat in six patients with CD at a single center in Poland, initially participating in the LINC4 study. At week 36, all six patients met the key secondary endpoint of the LINC4 trial, achieving normalization of median urinary free cortisol. Osilodrostat treatment allowed for complete disease control in all patients and none of the patients was excluded due to the lack of treatment effectiveness in 156 weeks of follow-up. All patients demonstrated significant improvement from baseline on most metabolic and cardiovascular parameters, which was most evident at week 36 and sustained throughout the study period. This study supports and strengthens the role of osilodrostat as an effective long-term medical treatment in patients with CD. We also present three patient case histories in detail to highlight the clinical situations that endocrinologists might face during osilodrostat therapy.

Comparison of surface characteristics of denture base resin materials with two surface treatment protocols and simulated brushing.

To investigate the effects of 4 denture base materials, 2 surface treatment protocols, and simulated brushing (SB) on the surface hardness, surface roughness, surface gloss, and the surface loss of denture base materials. Four denture base resin material groups (compression-molded, injection-molded, 3D-printed, and milled) with two different surface treatment protocols (polished and glazed) were utilized in this study. A total of 80 samples (n = 10) were evaluated for surface hardness (Vickers) before SB. SB was performed for each sample (custom-built V8 cross brushing machine, 50,000 reciprocal strokes). Surface roughness (Ra) was measured before and after SB with a non-contact optical profilometer. Surface gloss was performed using a glossmeter to determine changes in surface reflectivity of the specimens before and after SB. Surface loss (wear resistance) was measured after SB using optical profilometry. The effects of material, surface treatment, and SB on all surface characteristics were examined with two-way and three-way analysis of variance models (ANOVA) (α = 0.05). The polished compression-molded group had significantly higher surface hardness than all other groups. The protective glaze coating significantly increased the surface hardness for all groups (P < 0.001). SB increased the surface roughness of all groups regardless of surface treatments (P < 0.001). The increase in surface roughness after SB was significantly higher with polished surface treatment than with a glazed surface treatment in all groups (P < 0.001). Surface gloss was significantly higher with the glazed surface treatment than with the polished surface treatment for all denture base materials (P < 0.001). After SB, milled denture base material showed the highest, and 3D-printed material showed the second highest surface gloss compared to the other groups (P < 0.001), regardless of surface treatment. In all materials tested, surface glaze significantly decreased surface loss (P < 0.001). With the glaze surface treatment, compression-molded denture base material had significantly less surface loss (more surface gain) than other materials, while with the polished surface treatment, 3D-printed denture base material had the least surface loss when compared with other groups. A single layer of nano-filled, light-polymerizing protective glaze coating has displayed potential for enhancing the longevity of denture base materials, as evidenced by increased hardness and wear resistance. Following simulated brushing, the milled denture material exhibited the highest surface gloss and lowest surface roughness among all groups, regardless of the surface treatment protocol. This indicates that milled denture base material possesses favorable surface properties and may serve as a viable alternative to traditional denture base materials.

Textor viator. Mobilność tkaczy Pogórza Karpackiego w epoce nowożytnej

Spatial mobility of communities living in the Carpathian Foothills in the early modern era is an interesting issue, primarily because of local ethnic diversity. In addition to representatives of Polish ethnic groups, Orthodox (later Greek Catholic) Wallachians and Ruthenians, Hungarians and Jews lived here. According to chronicle narratives (Kromer, Bielski, Stryjkowski, Piasecki, Starowolski) from the 16th–17th centuries, however, the region was characterized above all by a high degree of population of descendants of former German settlers (called Deaf Germans), brought in 14th–15th centuries, who still spoke a language similar to German and professionally engaged in weaving (especially nearby the towns of Biecz, Krosno and Łańcut). The aim of the article is to look at the issue of mobility of this professional group based on the entries from the Book of Admission to the Municipal Law of Biecz (1538–1690) and in the context of research on the Deaf Germans. The analysis of the data confirms that the key group arriving in the foothills town were weavers from various areas of the former German settlement. In addition to the issue of spatial mobility, attention will also be devoted to social mobility, because moving from the countryside to the city was an opportunity for social advancement at that time.

Threat or treat: Exposure assessment and risk characterisation of chemical contaminants in soft drinks and chocolate bars in various Polish population age groups.

In the frame of the European Food Risk Assessment (EU-FORA) fellowship programme, two studies on chemical contaminants in food matrices were carried out in Warsaw, Poland, at the Department of Food Safety and Chemical Analysis, Institute of Agricultural and Food Biotechnology. The first study addressed health concerns about the dietary exposure to bisphenol A (BPA) contamination due to consumption of soft drink by Polish population. BPA is an organic additive used in the production of epoxy resins and polycarbonate plastics and because of this it is used in the internal coating of cans and in plastic bottle production. Depending on several factors, BPA can migrate from these materials to the soft drink and so, it can be ingested by consumers causing hormonal and reproductive disorders. To estimate the Polish population exposure to BPA, several soft drinks belonging to different brands were purchased from a supermarket in the city of Warsaw and analysed. The result of the analysis highlight that mean BPA exposure in the Polish population exceeds the tolerable daily intake proposed by the EFSA scientific opinion, raising health concerns. On the other hand, the second study, focused on cadmium exposure due to chocolate consumption by Polish population, did not raise any health concern. Cadmium is a heavy metal that naturally occurs in its inorganic form in the environment and its presence in chocolate derives only from the cocoa beans and not from contamination during processing. Its accumulation in the human body can create several adverse effects, including renal dysfunction and failure. To estimate the Polish population exposure to cadmium, several chocolate bars were purchased from a supermarket in the city of Warsaw and analysed. The results of the analysis show that cadmium exposure in the Polish population does not exceed the tolerable weekly intake proposed by the EFSA scientific opinion.

Do Polishing Methods and Colorant Beverages Affect the Color Stainability of 3D-printed Permanent Restorations?

Aim: This in vitro study evaluated the effect of polishing methods on the color stainability of 3D-printed permanent restorations while immersed in colorant beverages (distilled water, tea, coffee, and red wine) for 30 days. Materials and Methods: A total of 120-disc-shaped samples (10 mm × 1.5 mm) were fabricated using a stereolithography printer (Formlabs 3B, Formlabs, Massachusetts) with a three-dimensional (3D)-printable permanent resin (Permanent Crown, Formlabs, Massachusetts). The samples were polished with mechanical polishing, Optiglaze (GC Dental Products Corp, Aichi, Japan), or Vita Akzent LC (VITA Zahnfabrik, Bad Säckingen, Germany) ( n = 40). Initial color measurements were performed using a spectrophotometer (VITA Easyshade V; Vita Zahnfabrik). Then the samples were divided into four different subgroups depending on beverages immersed in distilled water, coffee, tea, and red wine ( n = 10). After immersion in beverages for 30 days, color measurements were repeated. Color changes were calculated using the CIEDE2000 color change (Δ E00) formula. Δ E00 was evaluated according to 50:50% color perceptibility (PT00 = 0.81) and acceptability (AT00 = 1.81) thresholds. A two-way analysis of variance (ANOVA), Tukey HSD test with Bonferroni adjustment, and paired-sample t-tests were used for statistical evaluation. Results: The highest ΔE00 was noted in mechanical polishing groups ( p &lt; .001). Red wine caused the most significant discoloration in the mechanical polishing group ( p &lt; .05). ΔE00 of mechanical polish groups showed a significantly higher color change than the perceptibility and acceptability thresholds ( p &lt; .001). Optiglaze can reduce 3D-printed permanent restoration discoloration caused by all beverages, Vita Akzent LC can reduce discoloration caused by tea and red wine. Conclusion: Glaze materials can reduce the restoration discoloration caused by colorant beverages.

Influence of different surface finishing protocols on the wear behavior of a lithium disilicate glass-ceramic.

This study aims to evaluate the effect of different finishing protocols on the wear behavior of a lithium disilicate glass-ceramic. Specimens were produced from lithium disilicate glass-ceramic prefabricated CAD/CAM blocks and divided into three groups, according to the surface treatment (n = 8): control; polishing; glaze. Ceramic specimens were subjected to wear test using a dual-axis chewing simulator. A 49 N load was applied in the axial direction combined with a lateral movement (1 mm path) using a lithium disilicate glass-ceramic spherical piston for a total of 106 cycles. Qualitative analysis of the wear surface was performed using an optical microscope. Quantitative analysis of surface roughness and volume loss was performed using a confocal microscope and a 3D-image editing software, respectively. Surface roughness and volume loss data were analyzed using Friedman's non-parametric statistical test for repeated measures and the Student-Newman-Keuls test (α = 0.050). There were statistical differences for surface roughness and volume loss of lithium disilicate glass-ceramic specimens in the different experimental conditions (P˂0.001). Control and polishing groups showed similar surface roughness and volume loss values for all testing times. Glaze group had greater wear volume after 103, 104 and 105 cycles. After 106 cycles, surface roughness and volume loss were similar among groups. For the piston, surface roughness was similar over time and among groups. A distinct wear behavior was found for glazed glass-ceramic specimens in comparison to control and polished specimens. The end of the simulation, the surface roughness and volume loss was similar for the groups.