scholarly journals Transportation degrades the quality of plaster cast models in virtual surgical planning -Is it time for direct intraoral scanning?

2020 ◽  
Vol 3 (2) ◽  
pp. 153-159
Author(s):  
Kasper Stokbro ◽  
◽  
Rasmus Hartman-Ryhl ◽  
Marie Kjærgaard Larsen ◽  
Lillian Marcussen
Keyword(s):  
Plaster Cast ◽  
Physical Models ◽  
Orthodontic Appliances ◽  
Digital Models ◽  
Intraoral Scanning ◽  
Cast Model ◽  
Dental Models ◽  
Clinically Significant ◽  
Primary Predictor

The plaster cast model (PCM) needs to precisely reproduce the patient’s dentition to ensure optimal fit of the surgical splint; However, transporting physical models entails a risk of fracture of cusps, brackets or entire models. This study evaluated whether clinically significant differences (>1 mm) exist between the patient’s dentition and the PCM, and whether additional fractures occur from transportation from Odense, Denmark, to Rockhill, USA. This prospective study enrolled 10 orthognathic surgical patients. Three digital models were produced per patient: A direct intraoral scan, a scan of the PCM in Odense, Denmark, and a scan of the PCM at 3D Systems, Rockhill, USA. Primary outcome was distance between 2 sets of digital models. Primary predictor was transportation. The study found only 2 patients with no differences above 1 mm. Fractures occurred more often on brackets compared with teeth (Odds ratio: 5.4; P < .001). Fractures of brackets occurred twice as often on maxillary models (P = .045). Fractures occurred equally often during the 2 transportations. In conclusion, surgical splints produced from PCM could incorporate inaccuracies primarily related to the orthodontic appliances. Therefore, it is recommended to minimize model transportation before digitization and preferably use intraoral scanning to minimize errors. Key words: Orthognathic surgery, Surgical splints, dental models, digital occlusion, intraoral scanner, plaster cast model.

scholarly journals 3D Printed Dental Models A comparative analysis

2019 ◽  
Vol 56 (1) ◽  
pp. 51-54 ◽  
Author(s):  
Ana Maria Cristina Tancu ◽  
Mihaela Pantea ◽  
Alexandra Totan ◽  
Mihaela Tanase ◽  
Marina Imre
Keyword(s):  
Comparative Analysis ◽  
Clinical Application ◽  
Statistical Evaluation ◽  
Plaster Cast ◽  
Fisher Test ◽  
Intraoral Scanning ◽  
Cast Model ◽  
Dental Models ◽  
3D Printed ◽  
Made In

The aim of this study is to compare two different methods used for obtaining printed dental models -intraoral scanning and extraoral scanning; the comparative analysis was made in correlation to the accuracy of the traditional plaster cast model. Nine dental models were obtained: three plaster cast ones, three printed after intraoral scanning and there printed after impression scanning. A total of 137 measurements (arch and tooth measurements) were done on the three types of models and a statistical evaluation was performed (t-test, Fisher Test). Our results highlighted that 3D printed dental models represent a reliable option for clinical application.

scholarly journals Digital models and orthodontic diagnosis: what degree of reliability?

2021 ◽  
Vol 8 ◽  
Author(s):  
ABDOUL Hafizou RABE ◽  
Fatima SALEK ◽  
Intissar El IDRISSI ◽  
Fatima ZAOUI ◽  
Hicham BENYAHIA
Keyword(s):  
Systematic Review ◽  
Numerical Models ◽  
Meta Analysis ◽  
Physical Models ◽  
Cochrane Library ◽  
Digital Models ◽  
Significant Difference ◽  
Clinically Significant ◽  
Conventional Models ◽  
Plaster Models

Abstract  Background: Our study aims to evaluate, through a systematic review, the reliability of numerical models compared to conventional models on the main parameters of orthodontic diagnosis  Method: four databases were consulted: PubMed; Google Scholar, Cochrane Library, and Ebscohost. The research included published studies since 2010, meta-analysis studies, randomized and non-randomized controlled trials, prospective and retrospective studies. Results: Among 3811 selected references, only five studies met our inclusion criteria. In the systematic review, there were statistical differences between the digital models and the plaster models. However, this difference is clinically acceptable. On the other hand, there are some limitations, relative to the types of the severity of the congestion, the elapsed time to digitize, and the numerical means. Conclusion: The results of our systematic review have shown that there is no clinically significant difference between the numerical and physical models for the majority of diagnostic parameters.

scholarly journals Model Analysis of Digital Models in Moderate to Severe Crowding: In Vivo Validation and Clinical Application

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Jae Hee Yoon ◽  
Hyung-Seog Yu ◽  
Yoonjeong Choi ◽  
Tae-Hyun Choi ◽  
Sung-Hwan Choi ◽  
...  
Keyword(s):  
Clinical Application ◽  
Digital Model ◽  
Digital Models ◽  
Linear Measurements ◽  
Significant Difference ◽  
Cast Model ◽  
Clinically Significant ◽  
Plaster Model ◽  
Model C

Objective. We investigated the suitability of intraoral-scan models for measuring tooth dimensions and the amount of crowding in patients with severe tooth crowding. Materials and Methods. Fifty-eight patients who had undergone intraoral scans for diagnosis were included. Cast models were divided into two groups depending on the amount of crowding, as determined by initial caliper-based measurements (mild crowding [MC] group: <3.0 mm; severe crowding [SC] group: >4.5 mm). Twenty maxillary models and 20 mandibular models were used in this study. For the three types of models (i.e., IS digital model, C cast model, and CS digital model), the reproducibility and the precision of linear measurements were evaluated. Results. We found that linear measurements made using digital calipers on a plaster model and on the relevant software were reproducible. There was no significant difference in most linear measurements between digital models and the C model. There were differences in the amount of crowding (p<.05), although these were not clinically significant. There was no relationship between the precision of crowding in the three types of models and the severity of crowding. Conclusions. Digital models can be used for measuring crowding in both mild and severe crowding cases. However, crowding measured by digital models tends to be lesser than that measured by cast models, and this should be considered during clinical application.

scholarly journals A Review of Evidence-Based Recommendations for Pericoronitis Management and a Systematic Review of Antibiotic Prescribing for Pericoronitis among Dentists: Inappropriate Pericoronitis Treatment Is a Critical Factor of Antibiotic Overuse in Dentistry

2021 ◽  
Vol 18 (13) ◽  
pp. 6796
Author(s):  
Jan Schmidt ◽  
Martina Kunderova ◽  
Nela Pilbauerova ◽  
Martin Kapitan
Keyword(s):  
Systematic Review ◽  
Local Therapy ◽  
Critical Factor ◽  
Antibiotic Use ◽  
Narrative Review ◽  
Antibiotic Prescribing ◽  
Evidence Based ◽  
Antibiotic Overuse ◽  
Clinically Significant

This work provides a narrative review covering evidence-based recommendations for pericoronitis management (Part A) and a systematic review of antibiotic prescribing for pericoronitis from January 2000 to May 2021 (Part B). Part A presents the most recent, clinically significant, and evidence-based guidance for pericoronitis diagnosis and proper treatment recommending the local therapy over antibiotic prescribing, which should be reserved for severe conditions. The systematic review includes publications analyzing sets of patients treated for pericoronitis and questionnaires that identified dentists' therapeutic approaches to pericoronitis. Questionnaires among dentists revealed that almost 75% of them prescribed antibiotics for pericoronitis, and pericoronitis was among the top 4 in the frequency of antibiotic use within the surveyed diagnoses and situations. Studies involving patients showed that antibiotics were prescribed to more than half of the patients with pericoronitis, and pericoronitis was among the top 2 in the frequency of antibiotic use within the monitored diagnoses and situations. The most prescribed antibiotics for pericoronitis were amoxicillin and metronidazole. The systematic review results show abundant and unnecessary use of antibiotics for pericoronitis and are in strong contrast to evidence-based recommendations summarized in the narrative review. Adherence of dental professionals to the recommendations presented in this work can help rapidly reduce the duration of pericoronitis, prevent its complications, and reduce the use of antibiotics and thus reduce its impact on patients' quality of life, healthcare costs, and antimicrobial resistance development.

scholarly journals Estimating the minimum important difference in the DEMQOL instrument in people with dementia

2021 ◽  
Author(s):  
Ellen C. Lee ◽  
Jessica Wright ◽  
Stephen J. Walters ◽  
Cindy L. Cooper ◽  
Gail A. Mountain
Keyword(s):  
Quality Of Life ◽  
Controlled Trial ◽  
Minimum Important Difference ◽  
Absolute Change ◽  
People With Dementia ◽  
Related Quality ◽  
Registration Number ◽  
Clinically Significant ◽  
Randomised Controlled

Abstract Purpose The Dementia-Related Quality of Life (DEMQOL) measure and the DEMQOL-Utility Score (DEMQOL-U) are validated tools for measuring quality of life (QOL) in people with dementia. What score changes translate to a clinically significant impact on patients’ lives was unknown. This study establishes the minimal important differences (MID) for these two instruments. Methods Anchor-based and distribution-based methods were used to estimate the MID scores from patients enrolled in a randomised controlled trial. For the anchor-based method, the global QOL (Q29) item from the DEMQOL was chosen as the anchor for DEMQOL and both Q29 and EQ-5D for DEMQOL-U. A one category difference in Q29, and a 0.07 point difference in EQ-5D score, were used to classify improvement and deterioration, and the MID scores were calculated for each category. These results were compared with scores obtained by the distribution-based methods. Results A total of 490 people with dementia had baseline DEMQOL data, of these 386 had 8-month data, and 344 had 12-month DEMQOL data. The absolute change in DEMQOL for a combined 1-point increase or decrease in the Q29 anchor was 5.2 at 8 months and 6.0 at 12 months. For the DEMQOL-U, the average absolute change at 8 and 12 months was 0.032 and 0.046 for the Q29 anchor and 0.020 and 0.024 for EQ-5D anchor. Conclusion We present MID scores for the DEMQOL and DEMQOL-U instruments obtained from a large cohort of patients with dementia. An anchored-based estimate of the MID for the DEMQOL is around 5 to 6 points; and 0.02 to 0.05 points for the DEMQOL-U. The results of this study can guide clinicians and researchers in the interpretation of these instruments comparisons between groups or within groups of people with dementia. Trial Registration Number and date of registration: ISRCTN17993825 on 11th October 2016.

scholarly journals Health-related quality of life and anxiety in the PAN-CAN lung cancer screening cohort

BMJ Open ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. e024719 ◽  
Author(s):  
Niloofar Taghizadeh ◽  
Alain Tremblay ◽  
Sonya Cressman ◽  
Stuart Peacock ◽  
Annette M McWilliams ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Cancer Screening ◽  
Lung Cancer Screening ◽  
Health Related Quality ◽  
Related Quality ◽  
Health Related ◽  
Anxiety Levels ◽  
Clinically Significant ◽  
Baseline Screening

ObjectivesThe impact of lung cancer screening with low-dose chest CT (LDCT) on participants’ anxiety levels and health-related quality of life (HRQoL) is an important consideration in the implementation of such programmes. We aimed to describe changes in anxiety and HRQoL in a high-risk Canadian cohort undergoing LDCT lung cancer screening.Methods2537 subjects who had 2% or greater lung cancer risk over 6 years using a risk prediction tool were recruited from eight centres across Canada in the Pan-Canadian Early Detection of Lung Cancer Study (2008–2010). We compared HRQoL and anxiety levels before and after screening of 1237 participants with LDCT (excluding a subset of 1300 participants who also underwent autofluorescence bronchoscopy screening), as well as after investigations performed because of a positive screening examination. The 12-item short-form Physical and Mental Component Scales (SF-12), EQ-5D-3L scores and State Trait Anxiety Inventory-State anxiety were used at each assessment.ResultsOverall, there were no clinically significant differences in HRQoL outcomes between baseline and each of the survey time points following initial screening. No mean change in anxiety in the overall cohort was noted following baseline LDCT, but more participants had clinically significant increase in anxiety versus decrease after baseline screening (increase >minimal clinically important difference (MCID) (n=180) vs decrease >MCID (n=50), p<0.001). This finding persisted but to a lesser degree at the 12 month time point (increase >MCID (n=146) vs decrease >MCID (n=87), p<0.001).ConclusionsCT screening for lung cancer has no major overall impact on HRQoL among participants, although a minority of participants (number-needed-to-harm=7 after baseline screening and 18 at 1 year) demonstrated clinically significant increased anxiety levels.Trialregistration numberNCT00751660; Results.

scholarly journals QOLP-04. PILOT STUDY OF A VIDEOCONFERENCE-BASED PSYCHOLOGICAL INTERVENTION FOR FAMILY CAREGIVERS OF PATIENTS WITH MALIGNANT GLIOMAS

2020 ◽  
Vol 22 (Supplement_2) ◽  
pp. ii175-ii175
Author(s):  
Deborah Forst ◽  
Michelle Mesa ◽  
Emilia Kaslow-Zieve ◽  
Areej El-Jawahri ◽  
Joseph Greer ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Self Efficacy ◽  
Coping Skills ◽  
Malignant Gliomas ◽  
Anxiety Symptoms ◽  
Structured Interviews ◽  
Post Intervention ◽  
Clinically Significant ◽  
And Coping

Abstract BACKGROUND Caregivers of patients with malignant gliomas experience substantial anxiety symptoms while caring for someone with progressive neurological decline. Yet, interventions to reduce psychological distress and improve quality of life (QoL) in this caregiver population are lacking. METHODS We conducted an open pilot study evaluating feasibility and acceptability of a cognitive behavioral therapy-based intervention for caregivers of patients with malignant gliomas with clinically significant anxiety (Generalized Anxiety Disorder [GAD-7] score ≥ 5). Caregivers participated in six videoconference sessions with a mental health provider. We defined the intervention as feasible if ≥ 70% of eligible caregivers enrolled and ≥ 70% of those enrolled completed ≥ 50% of sessions. We evaluated intervention acceptability in semi-structured interviews. Caregivers completed baseline and post-intervention surveys assessing anxiety and depression symptoms (Hospital Anxiety and Depression Scale), QoL (Caregiver Oncology Quality of Life Questionnaire), caregiving burden (Caregiver Reaction Assessment), self-efficacy (Lewis Cancer Self-Efficacy Scale), and perceived coping skills (Measure of Current Status-Part A). We explored post-intervention changes using paired t-tests. RESULTS We obtained consent from 70.0% (21/30) of caregivers approached, of which 66.7% (14/21) had clinically significant anxiety and thus were eligible to participate (mean age=55.7 years, 64.3% female). Among enrolled caregivers, 71.4% (10/14) completed ≥ 50% of sessions. In semi-structured interviews, all participants found the intervention helpful and valued the ability to participate remotely via videoconference. Among caregivers who completed at least one session, 80.0% (8/10) completed all assessments and were included in analyses. Post-intervention, caregivers reported reduced anxiety symptoms (P=.02) and improved QoL (P=.03) and coping skills (P=.001). We found no significant change in depression, caregiving burden, or self-efficacy. CONCLUSION Our videoconference-based intervention is feasible and acceptable to caregivers. Participants reported significant improvements in anxiety symptoms, quality of life, and coping skills post-intervention, supporting further investigation of the intervention in a randomized controlled trial.

scholarly journals Duration of orthodontic treatment with fixed appliances in adolescents and adults: a systematic review with meta-analysis

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Allen Abbing ◽  
Vasiliki Koretsi ◽  
Theodore Eliades ◽  
Spyridon N. Papageorgiou
Keyword(s):  
Treatment Duration ◽  
Meta Analysis ◽  
Risk Of Bias ◽  
Adult Patients ◽  
Comprehensive Treatment ◽  
Orthodontic Appliances ◽  
Duration Of Treatment ◽  
Quality Of Evidence ◽  
Fixed Appliances

Abstract Objectives Adults with fixed orthodontic appliances are increasing nowadays. Compared with adolescents, adults present biological differences that might influence treatment duration. Therefore, the aim of the study was to compare duration of treatment with fixed appliances between adults and adolescents. Materials and methods Eight databases were searched up to September 2019 for randomized and non-randomized clinical studies comparing treatment duration with fixed appliances in adolescents and adult patients. After duplicate study selection, data extraction, and risk of bias assessment with the Cochrane ROBINS-I tool, random effects meta-analyses of mean differences (MD) and their 95% confidence intervals (CIs) were performed, followed by assessment of the quality of evidence with GRADE. Results A total of 11 unique studies (one prospective and 10 retrospective non-randomized) with 2969 adolescents and 1380 adult patients were finally included. Meta-analysis of 7 studies found no significant difference in the duration of comprehensive treatment with fixed appliances (MD = − 0.8 month; 95% CI = − 4.2 to 2.6 months; P = 0.65; I2 = 92%) between adults and adolescents. Similarly, both distalization of upper first molars with skeletal anchorage for class II correction and the retraction of canines into the premolar extraction spaces lasted similarly long among adults and adolescents. On the other hand, alignment of palatally displaced canines lasted considerably longer in adults compared to adolescents (1 study; MD = 3.8 months; 95% CI = 1.4 to 6.2 months; P = 0.002). The quality of evidence for the meta-analysis was low due to the inclusion of non-randomized studies with considerable risk of bias. Conclusions While existing evidence does not indicate a difference in the overall duration of treatment with fixed appliances between adults and adolescents, the alignment of palatally displaced canines lasted significantly longer in adults. However, our confidence in these estimates is low due to the risk of bias in the included studies. Trial registration PROSPERO: (CRD42019148169)

scholarly journals Assessment of Dental Arch Reproduction Quality by Using Traditional and Digital Methods

2021 ◽  
Vol 11 (3) ◽  
pp. 1263
Author(s):  
Mateusz Wójcik ◽  
Dariusz Skaba ◽  
Małgorzata Skucha-Nowak ◽  
Marta Tanasiewicz ◽  
Rafał Wiench
Keyword(s):  
Standard Model ◽  
Significant Degree ◽  
Physical Models ◽  
Average Error ◽  
Dental Arch ◽  
Arch Model ◽  
Linear Dimensions ◽  
The Standard Model ◽  
Digital Methods

Background: There exists few scientific reports on the quality of digitally reproduced dental arches, even though digital devices have been used in dentistry for many years. This study assesses the accuracy of the standard dental arch model reproduction using both traditional and digital methods. Methods: The quality of the full upper dental arch standard model reproduction by physical models obtained through traditional and digital methods was compared: gypsum models (SGM) and models printed from data obtained using an intraoral scanner (TPM) (n = 20). All models were scanned with a reference scanner. Comparisons were made using Geomagic Control X program by measuring deviations of the models relative to the standard model and analyzing linear dimensions deviations. Results: The average error of reproduction accuracy of the standard model ranged from 0.0424 ± 0.0102 millimeters (mm) (SGM) to 0.1059 ± 0.0041 mm (TPM). In digital methods, all analyzed linear dimensions were shortened to a statistically significantly degree compared to traditional. The SGM method provided the smallest deviations to a significant degree of linear dimensions from the pattern, and TPM the largest. The intercanine dimension was reproduced with the lowest accuracy, and the intermolar the highest in each method. Conclusions: Traditional methods provided the highest reproduction trueness of the full dental arch and all analyzed linear dimensions. The intercanine dimension was reproduced with the lowest accuracy, and the intermolar the highest in each method, where digital methods shortened all analyzed linear dimensions.

scholarly journals Clinical Holistic Medicine: A Pilot Study on HIV and Quality of Life and a Suggested Cure for HIV and AIDS

2004 ◽  
Vol 4 ◽  
pp. 264-272 ◽  
Author(s):  
Søren Ventegodt ◽  
Trine Flensborg-Madsen ◽  
Niels Jørgen Andersen ◽  
Mohammed Morad ◽  
Joav Merrick
Keyword(s):  
Quality Of Life ◽  
Hiv And Aids ◽  
Cd4 Count ◽  
Holistic Medicine ◽  
Cross Sectional ◽  
Ethical Attitude ◽  
Validated Questionnaire ◽  
Clinically Significant ◽  
Higher Consciousness

This study was undertaken to examine the association between the immunological impact of HIV (measured by CD4 count) and global self-assessed quality of life (QOL) (measured with QOL1) for people suffering from HIV, to see if the connection was large and statistically strong enough to support our hypothesis of a strong QOL-immunological connection through the nonspecific, nonreceptor-mediated immune system, and thus to give a rationale for a holistic cure for HIV. This cross-sectional population study in Uganda included 20 HIV infected persons with no symptoms of AIDS and a CD4 count above 200 mill./liter. The main outcome measures were CD4 count, global QOL measured with the validated questionnaire QOL1, translated to Luganda and translated back to English. We found a large, clinically significant correlation between the number of T-helper cells (CD4) and global self-assessed quality of life (QOL1) (r = 0.57, p = 0.021), when controlled for age, gender, and years of infection. Together with other studies and holistic medicine theory, the results have given rationale for a holistic cure for HIV. We suggest, based on our findings and theoretical considerations, that HIV patients who improve their global QOL, also will improve their CD4 counts. Using the technique of holistic medicine based on the life mission theory and the holistic process theory of healing, we hypothesize that the improvement of QOL can have sufficient biological effect on the CD4, which could avoid or postpone the development of AIDS. A holistic HIV/AIDS cure improving the QOL draws on hidden resources in the person and is thus affordable for everybody. Improving global QOL also means a higher consciousness and a more ethical attitude, making it more difficult for the HIV-infected person to pass on the infection.

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