1,720,995 research outputs found
Āsana for Back, Hips and Legs to Prevent Musculoskeletal Disorders among Dental Professionals: In-Office Yóga Protocol
Full text linkAbstract: Dental professionals are exposed to significant unavoidable physical stress, and theoretical
ergonomic recommendations for a sitting workplace are inapplicable in many dental activities.
Work-related musculoskeletal disorders (WMSDs) represent a serious health problem among dental
professionals (prevalence: 64–93%), showing involvement of 34–60% for the low back and 15–25%
for the hips. Muscle stress; prolonged sitting; forward bending and twisting of the torso and
head; unbalanced working postures with asymmetrical weight on the hips and uneven shoulders;
and others are inevitable for dental professionals. Therefore, the approach for the prevention and
treatment of WMSDs must be therapeutic and compensatory. This project was conceived to provide
a Yoga protocol for dental professionals to prevent or treat WMSDs from a preventive medicine
perspective, and it would represent a Yoga-based guideline for the self-cure and prevention of
musculoskeletal problems. Methods: Specific Yoga positions ( ̄asana, such as Vir ̄asana, Virabhadr ̄asana,
Garud ̄asana, Utkat ̄asana, Trikon ̄asana, Anuvitt ̄asana, Chakr ̄asana, Uttan ̄asana, Pashimottan ̄asana) have
been selected, elaborated on and adapted to be practiced in a dental office using a dental stool or the
dental office walls or a dental unit chair. The protocol is specifically devised for dental professionals
(dentists, dental hygienists and dental assistants) and targeted for the low back, hips and legs
(including knees and ankles). The protocol includes Visranta Karaka Sthiti (supported positions)
in sitting (Upavistha Sthiti) and standing (Utthistha Sthiti) positions, twisting/torsions (Parivrtta),
flexions/forward bend positions (Pashima) and extensions/arching (Purva) for musculo-articular
system decompression and mobilization. Results: Over 60 Yog ̄asana—specifically ideated for back
detensioning and mobilization, lumbar lordosis restoration, trunk side elongation, hip release and leg
stretches and decontraction—are shown and described. The paper provides a meticulous description
for each position, including the detailed movement, recommendations and mistakes to avoid, and
the breathing pattern (breath control) in all the breath-driven movements ( ̄asana in viny ̄asa). An
exhaustive analysis of posture-related disorders affecting the lower body among dental professionals
is reported, including low-back pain, hip pain and disorders, piriformis syndrome and quadratus
femoris dysfunction (gluteal pain), iliopsoas syndrome, multifidus disorders, femoroacetabular and
ischiofemoral impingement, spinopelvic mobility, lumbopelvic rhythm, impairment syndromes,
lower crossed syndrome, leg pain, knee pain and ankle disorders. Conclusions: A detailed guideline
of ̄asana for low-back decompression, hip joint destress, piriformis and gluteal muscle release, lumbar
lordosis recovery and a spinopelvic mobility increase has been elaborated on. The designed Yog ̄asana
protocol represents a powerful tool for dental professional
Properties of a novel polydimethylsiloxane endodontic sealer
No full textAim: The study aims to assess sealing ability of a novel polydimethylsiloxane-based sealer in simulated wet root canals with wide apex, ion release (calcium and pH) and examine samples using ESEM.
Materials and methods: GuttaFlow bioseal, GuttaFlow2, and RoekoSeal Automix (Coltène/Whaledent Inc.) were tested.
Roots were prepared to obtain an apical diameter #40 using nickel–titanium rotary files (HyFlex CM, Coltène/Whaledent Inc.), each root was filled with single cone technique and immediately inserted into a simulated socket (filled with 0.02 mL of simulated body fluid) to reproduce the clinical conditions of a wet apical environment. Sealing ability was evaluated as fluid filtration rate at 1, 14, 28 days, and 10 months.
After 28 days in simulated body fluid, apices were examined using an Environmental Scanning Electron Microscope (ESEM).
Alkalinizing activity and calcium release was evaluated after 3 h and 1, 7, 14, and 28 days.
Data were analysed using Kolmogorov–Smirnov test (p < 0.05).
Results: Fluid filtration analysis showed no significant difference within materials. Significant difference was observed between 10 months observation and other time frames (p < 0.05) of the same group.
GuttaFlow bioseal showed a significantly higher alkalinising activity (p < 0.05). Calcium release ability showed no significant difference through time, however significant differences were observed among materials (p < 0.05).
Observation using ESEM at 28 days after root obturation showed the presence of the materials sealing the wide apical foramen.
Conclusions: All materials showed satisfying sealing ability. However due to low calcium release, their use is not suggested when apical barrier formation and periapical bone regeneration are needed
Multifactorial statistical analysis toward evaluation of MBL, PES and PI of a novel nonsubmerged implant to restore a single tooth: A 1-year prospective cohort study
Full text linkO b j e c t i v e
The objective of this study was to evaluate radiographic, clinical and
esthetic parameters of a new type of nonsubmerged 2-piece implant
placed in patients in need of single-tooth replacement.
M a t e r i a l s a n d m e t h o d s
Fifty-four consecutive patients requiring single-tooth replacement
received 62 2-piece nonsubmerged flapless implants characterized by
an innovative hyperbolic neck. The implant placement timing was as
follows: 15 immediately post-extraction (immediate), 18 after 8–12
weeks (early) and 29 after 10–12 months (delayed). Customized abutments
with an abutment–implant connection approximately 1–2 mm
above the soft-tissue level were positioned after 3 months, loaded with
provisional crowns and 20 days later with definitive crowns.
Gingival biotype (thin or thick) was investigated in all patients. Periimplant
marginal bone level (MBL; mm) was measured single-blinded on
periapical radiographs at 1, 3, 6 and 12 months (T1, T3, T6, T12). Papilla index
(PI), plaque score and bleeding on probing (BoP) were evaluated as clinical
parameters of soft tissue. Pink Esthetic Score (PES) was calculated as
the esthetic parameter.
R e s u l t s
The survival rate was 100%. The dropout rate was 1.85%. The mean MBL
was - 0.01 ± 0.26 at T1, - 0.17 ± 0.38 at T3, - 0.28 ± 0.32 at T6 and
- 0.37 ± 0.41 at T12. The PES (0–14) was 7.30 ± 2.80 at T0 (preoperatively),
11.06 ± 0.97 at T6 and 11.95 ± 1.04 at T12.
At (T12), delayed implants showed a greater (P < 0.05) bone loss compared
with early and immediate implants. Implants placed in thin biotype tissue
showed the greatest bone loss at 12 months with a significant (P < 0.01)
difference with respect to that at (T6). PES and PI increased from T0 to T12.
C o n c l u s i o n
These implants allow preservation of a good MBL and offer a new
approach to soft- and hard-tissue management, allowing a reduced
healing time with minimally invasive surgery, no additional re-entry and
fewer complications
Clinical Evaluation of a Novel Premixed Tricalcium Silicate Containing Bioceramic Sealer Used with Warm Carrier-Based Technique: A 12-Month Prospective Pilot Study
Full text linkBackground: This pilot prospective study analysed the clinical use of a new bioceramic premixed CaSi-containing sealer in association with a warm carrier-based technique. Methodology: Healthy patients (n = 38) requiring 40 root canal treatments were enrolled. Periapical X-rays were taken preoperatively, after root canal filling and after 1, 6, and 12 months. Two evaluators assessed the Periapical Index (PAI) and the sealer extrusion. The healing rate and survival rate were also evaluated. Barnard test was used to assess the relationship of each potential prognostic factor with periapical index (PAI) at 12-month follow-up. The significance level was set at 0.05. Results: Root canal treatments (n = 38) were analysed at the end-line (12 months). The total drop-out was 5% (two patients; two teeth). A total of 31 teeth (82%) (PAI 1-2) showed complete healing, while 7 (18%) are still healing. Cumulative survival was 100%. Apical extrusion of the sealers was observed in 18 cases (47%). Of these extrusions, nine (50%) resulted radiographically undetectable after 12 months. Conclusions: The study supports the use of premixed CaSi-based bioceramic sealers in association with carrier-based techniques. Periapical extrusion of the sealer and its radiographic modification or disappearance are possible events reported in the first 12 months
YOGA IN MEDICINE: A SYSTEMATIC REVIEW OF YOGA FOR MUSCULOSKELETAL DISORDERS
No full textObjective: Literature reports growing physical and psychological disorders affecting health professionals and dentists. This study reviews the effect of yoga therapy on musculoskeletal disorders (MSD), mainly towards health professionals and dentists.
Methods: Articles search has been performed in Web of Sciences, Scopus and PubMed databases using “Yoga” in association with the following keywords: Pain, Neck, Headache, Hand, Wrist, Low back, Hip, Musculoskeletal disorders, Upper musculoskeletal disorders, Arthritis, Inflammation, Occupational health, Preventive medicine, Dental professionals, Dental practice.
Results: A total of 835 articles were screened. Papers not in English language (N=15), or not indexed (N=177), or when only the abstract was available (N=183), or not reporting the detailed Yoga protocol (duration, week frequency, Asana or Pranayama), or reporting non-Yoga-derived protocols (N=370), or describing incomplete results (N=20) were excluded. A total of 70 studies were eligible for the inclusion in the study. Of these, 92% (65/70) were randomized clinical trials and included at least one control group, and 21% (15/70) did not report
Asanas name. Self-reported data (questionnaires on pain, quality of life, disability, psychological health, perceived stress, musculoskeletal discomfort) were included in 78% of the studies while measured data (mobility, stiffness, muscle tone, disc degeneration, inflammatory markers, nerve conduction, medication intake) were included
in 63% of the trials. Yoga therapy showed significant improvements on Pain-related MSD (9/13 studies, 69%), Head and Neck Pain/migraine (7/7, 100%), Shoulder MSD or upper-crossed syndromes (6/7, 85%), Hand and Wrist pathologies (4/9, 44%), Low-back MSD and Disc herniation (7/9, 78%), Arthritis/inflammation (8/9, 89%), and
Preventive medicine/occupational health problems/public health (6/8, 75%), musculoskeletal disorders-related to dental practice (5/7, 71%), musculoskeletal disorders-related to health professionals (3/5, 60%).
Conclusions: This systematic review supports the inclusion of yoga as a holistic approach for MSD. Yoga reduced pain intensity, improved functional outcomes, and enhanced overall well-being. Yoga represents a powerful tool for the prevention and treatment of MSD and an extraordinary path for the self-care of dental professionals, healthcare providers and sitting job workers, suffering from occupational biomechanical stresses and awkward postures
The Use of Two-Piece Transmucosal Implants Designed with a Convergent Neck: A 6-Year Clinical Prospective Cohort Study Evaluating the Impact on Soft and Hard Tissues
No full textPURPOSE: This prospective study evaluated the marginal bone level and periodontal parameters 6 years after placement of a convergent transmucosal neck implant. MATERIALS AND METHODS: In total, 71 implants were placed in 60 patients. Of these, 52 implants were placed with a flapless technique and with the convergent neck exposed by 1 mm (early and delayed placement), while 19 implants were placed immediately after extraction (immediate placement). At least 3 months after insertion, customized abutments were applied and provisional resin crowns were cemented, while being careful to prevent any tissue compression. After 3 weeks, definitive metal-ceramic crowns were designed with the finish line at the soft tissue level and free from any compression. The implant survival rate at 6 years, marginal bone level changes (ΔMBL, mm), and Pink Esthetic Score (PES) were evaluated. Gingival phenotype was determined before the implant surgeries (thin/thick). A three-level hierarchical model was examined with a random intercept and random slope on follow-up time at the patient level and a random intercept at the implant level. RESULTS: In all, 57 patients with 67 implants reached the 6-year point; 3 patients (5.0%) dropped out. The implant survival rate was 100%. ΔMBL from baseline to 24 months was 0.58 mm (95% CI: 0.48, 0.68), while ΔMBL from 24 to 72 months was 0.33 mm (95% CI: 0.19, 0.47). PES improved steadily from 6 to 48 months (+0.96; 95% CI: 0.71, 1.20), with overall stability at 72 months. No correlation between MBL and PES was observed. A significant association was found between thick gingival phenotype and less MBL variation. Greater implant diameter offered more MBL stability after 3 years but resulted in lower PES values. CONCLUSIONS: The use of convergent transmucosal neck implants placed with a flapless transmucosal approach with the crown margin positioned at the gingival level preserved marginal bone and guided gingival morphology for up to 72 months. The gingival phenotype was the parameter that most affected the soft and hard tissues. In the long term, implant placement timing was not related to MBL
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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