Comparison of commercially available preformed archwires with average natural arch forms

2021 ◽  
Vol 71 (11) ◽  
pp. 2495-2500
Author(s):  
Alaina Tariq Mughal ◽  
Abdullah Jan ◽  
Obaid Akhtar ◽  
Fareena Ghaffar ◽  
Hafiza Zobia Shafique ◽  
...  
Keyword(s):  
Observational Study ◽  
Post Treatment ◽  
Treatment Retention ◽  
Accurate Estimation ◽  
Arch Form ◽  
Facial Esthetics ◽  
Arch Forms ◽  
Dental Casts

Objective: The research was carried out to compare the dimensions of commercially available preformed archwires with natural arch forms of Pakistani subjects. Methods: An observational study that lasted for 6 months was conducted at AFID, Rawalpindi. Fifty-two maxillary and mandibular dental casts of orthodontically untreated subjects (26 males and 26 females) were evaluated to obtain arch dimensions at the canines and first molar levels with the help of digital Vernier calipers. Bracket-archwire assembly was constructed to accurately measure widths from bracket-slot (BS) points at both the canine and molar levels, in an attempt to mimic clinical archwire-bracket interface. Canine and molar depths were also recorded for accurate estimation of the digitized archwire widths at the aforementioned levels. Results: The archwires evaluated for maxilla were significantly wider at canines (42.16 ±1.84mm, p = 0.000) and first molars (58.45 ± 1.33mm, p = 0.014) compared to the canine and molar dimensions of the dental casts obtained from subjects (37.61 ± 3.75mm, 55.68 ± 4.05mm respectively). For mandible, statistically significant differences were found at the canine level where archwires (34.75 ± 1.66mm, p = 0.000) exhibited greater dimensions than mean intercanine widths (29.33 ± 3.35mm) of the subjects. Conclusion: At present, commercially obtainable preformed archwires are inconsistent with the diverse arch forms manifested in a group of subjects with almost ideal occlusion. Therefore; utilization of these archwires may create unwarranted wider dimensions of the arch form, especially in the intercanine region which can influence post treatment retention, stability and facial esthetics. Continuous..

scholarly journals Agreement of the clinician's choice of archwire selection on conventional and virtual models

2019 ◽  
Vol 89 (4) ◽  
pp. 597-604
Author(s):  
Sahar Haddadpour ◽  
Saeed Reza Motamedian ◽  
Mohammad Behnaz ◽  
Sohrab Asefi ◽  
Alireza Akbarzadeh Bagheban ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Computer Software ◽  
Kappa Statistics ◽  
Objective Method ◽  
Arch Form ◽  
Subjective Method ◽  
The Mean ◽  
Arch Forms ◽  
3D Software ◽  
Dental Casts

ABSTRACT Objectives: To compare archwire selection on dental casts with archwire selection using a three-dimensional (3D) software program (OrthoAid) and assess agreement between clinicians. Materials and Methods: The best-fitting archwires were selected for dental casts of 100 patients with malocclusion using two approaches by three orthodontists. The first method was to visually determine the fitness of five preformed nickel titanium archwires to the arch form on a dental cast (subjective method). The second method was archwire selection on a virtual image of the same cast by means of 3D software (objective method). Agreement between selections performed by the orthodontists was calculated using Kappa statistics. The accuracy of fit of the archwires to the curves fitted to the arch form was also calculated or reversely assessed by means of the root mean square (RMS) for both methods using the Dahlberg formula. Results: The mean RMS of the distances between the patient arch forms and the archwires for the subjective method was 1.163–1.366 mm. The agreement of selections between orthodontists was 42%–58% (Kappa ranged from .074 to .382). Using the 3D software (objective method), the mean RMS decreased to 0.966–1.171 mm, and agreement increased to 47% to 84% (Kappa ranged from .444 to .747). Conclusions: The use of 3D computer software for archwire selection in patients with malocclusion provided better adaptation and interexaminer reliability.

Long-term outcomes in patients with schizophrenia treated with risperidone long-acting injection or oral antipsychotics in Spain: Results from the electronic Schizophrenia Treatment Adherence Registry (e-STAR)

2009 ◽  
Vol 24 (5) ◽  
pp. 287-296 ◽  
Author(s):  
J.M. Olivares ◽  
A. Rodriguez-Morales ◽  
J. Diels ◽  
M. Povey ◽  
A. Jacobs ◽  
...  
Keyword(s):  
Observational Study ◽  
Treatment Adherence ◽  
Prospective Observational Study ◽  
Clinical Symptoms ◽  
Retrospective Chart Review ◽  
Treatment Retention ◽  
Severity Scores ◽  
Long Term Treatment ◽  
Long Acting

AbstractBackgroundThe electronic Schizophrenia Treatment Adherence Registry (e-STAR) is a prospective, observational study of patients with schizophrenia designed to evaluate long-term treatment outcomes in routine clinical practice.MethodsParameters were assessed at baseline and at 3 month intervals for 2 years in patients initiated on risperidone long-acting injection (RLAI) (n = 1345) or a new oral antipsychotic (AP) (n = 277; 35.7% and 36.5% on risperidone and olanzapine, respectively) in Spain. Hospitalization prior to therapy was assessed by a retrospective chart review.ResultsAt 24 months, treatment retention (81.8% for RLAI versus 63.4% for oral APs, p < 0.0001) and reduction in Clinical Global Impression Severity scores (−1.14 for RLAI versus −0.94 for APs, p = 0.0165) were significantly higher with RLAI. Compared to the pre-switch period, RLAI patients had greater reductions in the number (reduction of 0.37 stays per patient versus 0.2, p < 0.05) and days (18.74 versus 13.02, p < 0.01) of hospitalizations at 24 months than oral AP patients.ConclusionsThis 2 year, prospective, observational study showed that, compared to oral antipsychotics, RLAI was associated with better treatment retention, greater improvement in clinical symptoms and functioning, and greater reduction in hospital stays and days in hospital in patients with schizophrenia. Improved treatment adherence, increased efficacy and reduced hospitalization with RLAI offer the opportunity of substantial therapeutic improvement in schizophrenia.

scholarly journals Establishment of Yemeni Dental Arch Form

2013 ◽  
Vol 3 (2) ◽  
pp. 22-26
Author(s):  
Nabil M Al-Zubair
Keyword(s):  
Dental Arch ◽  
Clustering Method ◽  
Arch Form ◽  
Arch Width ◽  
Length Measurements ◽  
Arch Forms ◽  
Dental Arch Width ◽  
Dental Cast ◽  
Dental Arch Form

Objective: To assess the dental arch forms of Yemeni adult sample. Materials & Method: The Eucledian clustering method of analysis was utilized for the determination of dental arch form. A total of 398 study models were constructed and evaluated to do measurements for both arches using a modified sliding caliper gauge. Six dental cast measurements divided into three sagittal and three transverse measurements were utilized to represent the dental arch width and length measurements. Result: Narrow form is the most prevalent arch form (30.9%) followed by wide form (23.9%), their prominence appear more in females and the least prevalent arch form was the mid form (9.3%), while flat and pointed forms were in between 18.3% and 17.6% respectively. Conclusion: Five arch forms: narrow, wide, mid, pointed and flat were distinguished as unique forms for the dental arches, with the predominance of the narrow arch form were found among Yemeni adults.  

scholarly journals Estimation of stature from percutaneous length of tibia amongst Bengalee population-an observational study in a teaching institution in West Bengal, India

2019 ◽  
Vol 7 (5) ◽  
pp. 1653
Author(s):  
Tapas Ghosh
Keyword(s):  
Gender Differences ◽  
Observational Study ◽  
West Bengal ◽  
Accurate Estimation ◽  
Long Bones ◽  
Regression Equations ◽  
Body Parts ◽  
Teaching Institution ◽  
And Gender

Background: Assessment of stature from measurement of percutaneous body parts is important for identification. This assessment can be done from long bones, especially tibia and femur. Tibia is ideal in this context as it is subcutaneous, and measurement is easy. Various regression equations correlating stature with percutaneous length of tibia (PCLT) are outdated, incorrect or inappropriate. So, the present study aimed at finding a recent relationship, and if possible, correlation between PCLT and stature.Methods: PCLT and stature of 470 subjects of Burdwan district, West Bengal, India, were recorded.Results: New regression equations were derived from the data, taking into consideration the racial, geographic, secular and gender differences. After determining that PCLT and stature were related and positively correlated, the newly formulated regression equations were evaluated and found to be statistically significant.Conclusions: The new regression equations derived from this study could be employed for more accurate estimation of stature.

scholarly journals ASSESSMENT OF MEAN DISTANCE BETWEEN CENTRAL INCISOR AND INCISIVE PAPILLA WITH RESPECT TO STANDARDIZED ARCH FORM IN DENTATE SUBJECTS

2021 ◽  
Vol 12 (1) ◽  
pp. 9-16
Author(s):  
Ussamah Waheed Jatala ◽  
Anam Fayyaz Bashir ◽  
Nazia Yazdanie
Keyword(s):  
Central Incisor ◽  
Arch Form ◽  
Anterior Teeth ◽  
Significant Difference ◽  
The Mean ◽  
Edentulous Patients ◽  
Arch Forms ◽  
Age Range ◽  
Best Fit ◽  
Maxillary Arch

BACKGROUND & OBJECTIVE: Edentulous patients require accurate positioning of artificial maxillary anterior teeth in complete dentures to recover the esthetic and phonetic characteristics. This positioning is guided by measuring distance between central incisor (CI) and incisive papilla (IP) in dentate subjects which varies according to the ovoid, square and tapered maxillary arch forms. Objectives: 1- To determine the frequency of three different arch forms in dentate patients; 2- To assess the mean distance between central incisor and incisive papilla in each of the three maxillary arch forms. METHODOLOGY: 130 cases were selected by non-probability consecutive sampling, which included both genders and age range of 20-40 years. Impressions of maxillary arches were recorded and their casts photocopied. Arch form template was used to standardize the assessment of arch forms by best-fit method on the photocopies. The distance between mesio-incisal edge of CI and posterior border of IP was measured with digital verniercalipers (SparkFun,Colorado). RESULTS: Out of 130 subjects, 54 males and 76 females were present. The ovoid arch form was the most frequent form recorded at 67% (n=87) while the tapered arch was the least at 14% (n=18). The overall mean distance between central incisor (CI) and incisive papilla (IP) was 11.34mm (7.58mm - 16.45mm). The mean distance was the highest for ovoid arch form (11.58mm) and lowest for square (10.49) with a statistically significant difference (p=0.016) between the two arch forms. CONCLUSION: The ovoid arch was the most frequent arch form found in dentate subjects. The mean distance recorded was highest for ovoid arch followed by tapering arch and least for square arches.

scholarly journals Prevalence and associated risk factors for diabetic retinopathy at first ophthalmological contact

2021 ◽  
Vol 12 (8) ◽  
pp. 118-124
Author(s):  
Bhavkaran Singh ◽  
Prempal Kaur ◽  
Jaspreet Singh ◽  
Parveen Grang
Keyword(s):  
Risk Factors ◽  
Diabetic Retinopathy ◽  
Observational Study ◽  
Health Concern ◽  
Accurate Estimation ◽  
Diabetic Patients ◽  
Cross Sectional ◽  
Screening Programs ◽  
Duration Of Diabetes ◽  
Associated Risk Factors

Background: Type 2 diabetes mellitus (DM) is now considered as a growing global public health concern due to cost associated with diabetic micro and macrovascular complications. Diabetic retinopathy (DR) is one of the leading causes of vision loss. Accurate estimation of prevalence of DR among diabetic patients and associated risk factors are of crucial importance to plan and execute preventive strategies in the community. Aims and Objectives: The present cross sectional hospital based observational study was undertaken to determine the prevalence of DR in diabetic patients at their first ophthalmological contact and toevaluate associated risk factors. Materials and Methods: In this cross sectional hospital based observational study, all diabetic patients visiting ophthalmology clinic for the first time after being diagnosed as diabetic were enrolled. After recording demographic data and biochemical findings, each patient was investigated for DR and correlated with associated risk factors. Results: Of 1699 patients, majority (68.9%) of them had come to ophthalmology clinic with complaint of decreased vision. Only 16.12 % (274) patients had been referred for retinal exam by treating physician. DR was prevalent in 242(16.98%) non-referred and 31(11.31%) referred patients. Mean age and mean duration of diabetes was significantly higher in non-referred patients. Vision threatening DR was also significantly higher in nonreferred patients. Prevalence of DR was significantly correlated with age at presentation, duration of diabetes, rural background, uncontrolled diabetes, systolic blood pressure and high BMI. Conclusion: Low referral by treating physician and lack of awareness among patient accounts for late presentation of diabetic patients to ophthalmologist. Beyond just developing strategies to promote screening programs for early detection and management of DR, education of the patients,comprehensive planning and coordination between ophthalmologist and physician can go a long way to decrease the economic and social burden of preventable blindness due to diabetic retinopathy.

scholarly journals Evaluation of conformity of preformed orthodontic archwires and dental arch form

2019 ◽  
Vol 24 (1) ◽  
pp. 44-52
Author(s):  
Maheen Ahmed ◽  
Attiya Shaikh ◽  
Mubassar Fida
Keyword(s):  
Post Treatment ◽  
Class I ◽  
Dental Arch ◽  
Facial Profile ◽  
Arch Form ◽  
Mandibular Arch ◽  
The Mean ◽  
Dental Records ◽  
Orthodontic Archwires ◽  
Dental Arch Form

ABSTRACT Introduction: The alterations in the arch form during treatment are dictated by the dimensions of the archwires. Objective: This study aimed to determine the mean arch dimensions of a sample of Pakistani subjects and to evaluate the conformity of preformed archwires with mandibular arch form. Methods: The dental records of 1,500 adult subjects were evaluated. The mandibular casts of 42 subjects (males = females = 21) with balanced facial profile, Class I occlusion, ideal overjet and overbite were included. Brackets were bonded on all teeth. Arch dimensions were evaluated at canines, first premolars, second premolars, first and second molars, with digital vernier calipers. The arch widths at the level of aforementioned teeth were evaluated on the digitized archwires, using the mean arch depths of the subjects. Results: In males, the archwires were found to be wider at canines and premolars, and significantly narrower at first (p< 0.001, 95% CI = 2.03 - 5.74) and second molars (p< 0.001, 95% CI = 2.29 - 7.73) as compared to the arch dimensions of the mandibular casts. In females, the archwires were significantly narrower at canines (p< 0.001, 95% CI = 1.4 - 3.97), and first (p= 0.02, 95% CI = 0.402 - 4.41) and second molars (p< 0.001, 95% CI = 1.76 - 6.13). Conclusion: No single commercially available archwires evaluated in the present study conformed to the arch dimensions of our subjects. Utilization of the currently available archwires may result in unwarranted modification of arch form, which may lead to unstable post-treatment teeth position.

Prothrombotic profile in multiple myeloma: Response to treatment and associated thrombotic complications: A prospective observational study.

2013 ◽  
Vol 31 (15_suppl) ◽  
pp. e19531-e19531
Author(s):  
Dipanjan Panda ◽  
Atul Sharma ◽  
Vinod Raina ◽  
Lalit Kumar ◽  
Renu Saxena ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Observational Study ◽  
Factor Viii ◽  
Protein C ◽  
Prospective Observational Study ◽  
Indian Population ◽  
Protein S ◽  
Post Treatment ◽  
Factor Vii ◽  
Low Protein

e19531 Background: Venous thromboembolism (VTE) is a major complication of Multiple myeloma. The exact cause of thrombosis, role of anti myeloma drugs especially immunomodulators and steroids and the relation of thrombosis with alteration of thrombotic profile is not clear. While some available data is suggestive of low incidence of VTE in Asian population, true incidence and risk factors of VTE in Indian population is not known.So the present study was undertaken to have an evaluation of prothrombotic factors in Indian population. Methods: A prospective observational study was conducted from July 2008 to November 2009 at All India Institute of Medical Sciences (AIIMS), New Delhi, India. Thirty patients of newly diagnosed myeloma were recruited and were treated with thalidomide and dexamethasone for 4 months. Prothrombotic profile including protein Cand S, activated protein C resistance, plasma fibrinogen, factor VII and von Willebrand factor level was measured and Doppler study was done at baseline and after 4 months. Statistical analysis was done using SPSS 15 software. Frequency distribution, mean, median, range, standard deviation, Inter Quartile Range were calculated. To find out difference between pre and post treatment, Macnemar chi-square test (for proportion) and paired t test (mean) were done. Results: At the base line 4 patients (13%) had low protein C, 3 (10 %) had low protein S and 2 patients (6%) had high factor VIII. Post induction therapy 7 patients showed low protein C, 1 had low protein S and 1 had high factor VIII value. Rest of the factors was within normal limit both at baseline and post treatment in other patients. During the study period 2 subjects developed DVT. While one had low protein S, other patient had low protein C and low anti thrombin III which was done to find out the cause of DVT. Conclusions: Incidence of DVT in our patients seems to be less than western published data. Although thrombotic factors abnormalities are present in myeloma patients but the relation of coagulation factor abnormalities and development of DVT require further study. A larger prospective trial may be required to get a clear picture.

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