Publications by authors named "Joanna Grzelak"

5 Publications

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Assessing weaning stress - Relations between enamel hypoplasia, δO and δC values in human teeth obtained from early modern cemeteries in Wroclaw, Poland.

Ann Anat 2020 Nov 20;232:151546. Epub 2020 Jun 20.

Institute of Geological Sciences, Polish Academy of Sciences, Research Centre in Warszawa, Wroclaw, Poland.

Objectives: The aim of this paper is to assess linear enamel hypoplasia (LEH) on canines of adults from early modern Wroclaw cemeteries to compare δC and δO values in enamel formed before, during and after LEH formation, and to attempt to find a link between the selected indicators of the weaning process.

Material And Methods: 15 permanent canines with visible LEH were selected for analysis. Age at LEH formation was estimated using the Reid and Dean method. The perikymata count was used to estimate the duration of LEH formation. Incremental stable oxygen and carbon isotopes analysis was performed on tooth enamel to infer stress related to weaning and dietary patterns. Kruskal-Wallis ANOVA, Mann-Whitney U test and Spearman correlation were used in statistical inference.

Results: The average age of LEH formation was 3.14 years, with an average duration of 111 days. Stable carbon isotope values consistently increase in 73% of the individuals sampled. The values of δO do not show a dominant pattern. The average value of δC increases over the time of enamel formation. The δC values collected below LEH were negatively correlated with δO values and the duration of LEH termination.

Conclusions: Marking of carbon and oxygen isotopes indicates different stages of weaning. Advancements in diet change (determined by higher δC) corresponds with faster recovery after physiological stress episode. There is no evidence for different breastfeeding models between distinct parishes in early modern Wroclaw.
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November 2020

Anatomy-related ratios predict colonoscopy incompleteness in similar examination conditions.

Adv Clin Exp Med 2020 May;29(5):573-580

Institute of Functional and Clinical Anatomy, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany.

Background: Screening colonoscopy is one of the most popular modalities for screening and surveillance of colorectal cancer and other colon disorders.

Objectives: To introduce new ratios to predict the colonoscopy course in patients with similar characteristics.

Material And Methods: Five hundred screening colonoscopies (252 females and 248 males) were performed by an experienced endoscopist. Incomplete colonoscopies (without pathologic findings, i.e., disease-unrelated) were included in the study. Collected data was used to determine new ratios.

Results: An examination was completed in 231 (91.7%) females (F) and 239 (96.4%) males (M). The majority of incomplete colonoscopies were discontinued in the sigmoid colon: 8 F (38.1%) and 4 M (44.4%) or in the descendosigmoid flexure: 4 F (19%) and 2 M (22.2%). We found statistically significant higher risk of incompleteness in females (p = 0.03), patients after 2 or more surgical treatments (p = 0.007) and in males with lower body mass index (BMI) (p = 0.01) (χ2 tests). Moreover, we discovered a statistically significant correlation with 2 or more previous surgical treatments in the female group (p = 0.02) (χ2 test). We calculated the incomplete colonoscopy anatomy-related (ICAR) and modified ICAR (MICAR) ratios. The range of ICAR and MICAR was 0-0.17; the number of incomplete examinations ranged from 0 to 1 failed out of 6 attempts (calculation: 100:17 = 5.88).

Conclusions: The ICAR and MICAR ratios reflect the various risk of colonoscopy incompleteness (i.e., disease-unrelated) and highlight the differences between patients in similar examination condition.
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May 2020

Anatomical and Clinical Implications in Neocondyle Stability After a Condylectomy.

J Craniofac Surg 2020 Jan/Feb;31(1):241-250

Department of Radiology, Medical University in Wrocław, Wrocław, Poland.

: A condylectomy of the mandibular condyle is considered to be the treatment of choice in most cases of condylar head hyperactivity. The aim of the procedure is to remove the growth center of the mandible which is responsible for the mandibular enlargement and asymmetry. This surgical procedure has an impact on the condyle shape and position, but the restoration of mandibular movement and a stable joint position (namely, the proper alignment of the newly shaped condylar head within the condyle fossa) should also be considered important surgical outcomes. In this article, the authors present their own experience in performing condylectomies with an arthroplasty procedure and a special forced suturing technique (FST) in terms of achieving early, accurate mandibular movement and maintaining a stable condyle position in early and late outcomes.

Materials And Methods: A modified high condylectomy with arthroplasty and FST results had been studied in anatomical, radiological, and clinical model.

Results: Early findings after FST are promising. A slight improvement in lateral jaw movement was noted after condylectomy with arthroplasty (P < 0.05) both in early and late follow-up. Incisal opening, mandibular protrusion, and lateral movement were sustained. A stable condyle position within the fossa was achieved in each case of condylectomy with arthroplasty (P < 0.05).

Conclusions: The FST condylectomy and reattachment of the lateral pterygoid muscle in a new, wider position provided an improvement in lateral jaw movement as well as in incisal opening and mandibular protrusion in early follow-up examination compared to the presurgical values. It seems that the FST enabled a better new condylar head position in the glenoid fossa and improved early functional mandibular movement.
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March 2020

Diagnodent and VistaCam may be unsuitable for the evaluation of dental caries in archeological teeth.

Am J Phys Anthropol 2019 04 29;168(4):797-808. Epub 2019 Jan 29.

Department of Conservative Dentistry and Pedodontics, Wroclaw Medical University, Wroclaw, Poland.

Objectives: The aim of the study was to compare the usefulness of fluorescence-based caries detection systems (Diagnodent and VistaCam) for the assessment of carious lesions on archeological molars.

Materials And Methods: The study material consisted of teeth from the Cemetery of St. Mary Magdalene (Cmentarz św. Marii Magdaleny) in Wrocław, Poland. A sample of 178 permanent molars from 38 skulls were examined. Five surfaces of teeth (occlusal, mesial, distal, buccal, and lingual) were assessed on either basically cleaned or sandblasted teeth. Six diagnostic methods were used to detect carious lesions: the visual classification of the International Caries Detection and Assessment System (ICDAS II), fluorescent methods (Diagnodent and VistaCam), X-ray, cone beam computed tomography and histological sections. The sensitivity and specificity of the methods were determined using receiver operating characteristic (ROC) curves and the correlation between the severity of dental caries and the readouts obtained with each method.

Results: In most cases, Diagnodent and VistaCam yielded unsatisfactory specificity and sensitivity values. The area under curve (AUC) values in ROC curves for Diagnodent and Vistacam were lower than the AUC values obtained for the ICDAS II visual classification.

Conclusions: According to our results, in the case of archeological teeth, neither Diagnodent nor VistaCam can be regarded as a better diagnostic method than the ICDAS II visual classification of caries.
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April 2019

Comparison of short-term head and body growth in an infant, preschool children, and adolescent girls

Anthropol Anz 2016 Nov 28;73(4):275-282. Epub 2016 Oct 28.

Faculty of Biology and Environmental Sciences, Cardinal Stefan Wyszynski University in Warsaw, Woycickiego 1/3 St., 01-938 Warsaw, Poland.

Summary: : The aim of the present longitudinal study was to compare short-term growth in height, the circumference of the head, chest, and hips, biacromial width, as well as bi-iliac breadth in one infant, two preschool children, and seven adolescent girls. : The studied characteristics were measured four times a week. Stature was observed during 83-130 days and the other measures during 60 days. Intra-observer technical error was calculated (TEM), and smoothing techniques using combined repeated median/median hybrid filter (CRMMH) were applied. One-way analysis of variance (ANOVA) was used to estimate statistical significance of differences between mean values of length, as well as the number of stasis periods and steep changes. : Steep changes, continuous growth, and stasis periods were found in the studied individuals. The highest number of steep changes and the largest steep changes were noted for stature (0.85 cm). The longest period of stasis was 48 days for head circumference. There were no statistically significant differences between period length and number of stasis periods or steep changes in any of the measures of children. : Growth curves for stature and head circumference were similar, which may suggest a common pattern of growth, different from that for thoracic bones. Steep changes in body width measures were observed in the absence of increments in both stature and head circumference.
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November 2016