scholarly journals Maxillary expansion or contraction and occlusal contact adjustment: effectiveness of current aligner treatment

2021 ◽  
Author(s):  
Ulrike Riede ◽  
Sandra Wai ◽  
Sabrina Neururer ◽  
Bärbel Reistenhofer ◽  
Gregor Riede ◽  
...  
Keyword(s):  
Clinical Outcomes ◽  
Measuring Method ◽  
Rank Test ◽  
Treatment Goals ◽  
Maxillary Expansion ◽  
Clinical Model ◽  
Occlusal Contact ◽  
Planning Software ◽  
Signed Rank ◽  
Signed Rank Test

Abstract Objectives To evaluate the precision of aligner (Invisalign®) treatment with the current material (SmartTrack®) in achieving expansion or contraction of the maxilla and occlusal contacts as simulated in the proprietary planning software (ClinCheck®, CC). Materials and methods Thirty patients thus treated were retrospectively evaluated. Four maxillary models were analyzed per patient: a pretreatment model, a scan-based CC model, a posttreatment clinical model, and a CC model reflecting the treatment outcome as initially simulated. Thirteen transverse parameters were measured on each model separately by two investigators. Occlusal contacts were also analyzed. Results The measuring method was validated by both investigators arriving at similar results for the effectiveness by which the simulated treatment goals had been clinically achieved. Significant differences (p < 0.05; Wilcoxon signed-rank test) were observed for transfer precision from the casts to the planning software and between the simulated and clinical outcomes. Intense occlusal contacts in the simulations materialized less common (≈ 2%) than ideal contacts (≈ 60%) in the clinical outcomes. Conclusions The effectiveness of achieving the simulated transverse goals was 45% and was generally not found to be better with SmartTrack® than with the previously used Ex30® material. Out of 100 simulated occlusal contacts, 40 will never materialize, and achieving around 60 will adequately ensure a clinically favorable contact pattern. Clinical relevance With the caveat that any overcorrection will to some extent reduce the precision, it seems perfectly possible to make deliberate use of overcorrection in current aligner therapies for transverse maxillary expansion or contraction.

scholarly journals Repeatability in Color Measurements of a Spectrophotometer using Different Positioning Devices

2015 ◽  
Vol 16 (12) ◽  
pp. 933-938 ◽  
Author(s):  
So Ran Kwon ◽  
Fang Qian ◽  
Michael Hemming
Keyword(s):  
Color Change ◽  
Measuring Method ◽  
Rank Test ◽  
Human Teeth ◽  
Measuring Methods ◽  
Color Measurements ◽  
Signed Rank ◽  
Significant Difference ◽  
Signed Rank Test ◽  
Positioning Devices

ABSTRACT Aim This study aimed to evaluate the repeatability of color measurements of an intraoral spectrophotometer with the use of three different methods by two operators. Materials and methods A total of 60 teeth were obtained, comprising 30 human maxillary teeth [central incisors (n = 10); canines (n = 10); molars (n = 10)] and 30 artificial teeth [lateral incisors (n = 10); premolar (n = 20)]. Multiple repeated color measurements were obtained from each tooth using three measuring methods by each of the two operators. Five typodonts with alternating artificial and human teeth were made. Measurements were taken by two operators with the Vita EasyShade spectrophotometer using the custom tray (CT), custom jig (CJ) and free hand (FH) method, twice, at an interval of 2 to 7 days. Friedman test was used to detect difference among the three color measuring methods. Post hoc Wilcoxon signed-rank test with Bonferroni correction applied was used for pair-wise comparison of color measurements among the three methods. Additionally, a paired-sample t-test was used to assess a significant difference between the two duplicated measurements made on the same tooth by the same operator for each color parameter and measuring method. Results For operator A, mean (SD) overall color change-ΔE* (SD) perceived for FH, CT and CJ were 2.21(2.00), 2.39 (1.58) and 2.86 (1.92), respectively. There was statistically significant difference in perceived ΔE* in FH vs CJ (p = 0.0107). However, there were no significant differences between FH and CT (p = 0.2829) or between CT and CJ (p = 0.1159). For operator mean ΔE* (SD) for FH, CT and CJ were 3.24 (3.46), 1.95 (1.19) and 2.45 (1.56), respectively. There was a significant difference between FH and CT (p = 0.0031). However, there were no statistically significant differences in ΔE* in FH vs CJ (p = 0.3696) or CT vs CJ (p = 0.0809). Conclusion The repeatability of color measurements was different among the three measuring methods by operators. Overall, the CT method worked well for both operators. Clinical significance The use of a custom tray with apertures can improve the repeatability of color measurements of an intraoral spectrophotometer. How to cite this article Hemming M, Kwon SR, Qian F. Repeatability in Color Measurements of a Spectrophotometer using Different Positioning Devices. J Contemp Dent Pract 2015;16(12):933-938.

scholarly journals Evaluation of the effects of modified bonded rapid maxillary expansion on occlusal force distribution: A pilot study

2016 ◽  
Vol 10 (01) ◽  
pp. 103-108
Author(s):  
Fatma Deniz Uzuner ◽  
Hande Odabasi ◽  
Secil Acar ◽  
Tuba Tortop ◽  
Nilufer Darendeliler
Keyword(s):  
Rapid Maxillary Expansion ◽  
Rank Test ◽  
Force Distribution ◽  
Maxillary Expansion ◽  
Initial Value ◽  
Posterior Teeth ◽  
Occlusal Force ◽  
Signed Rank ◽  
Signed Rank Test ◽  
Mandibular Posterior Teeth

ABSTRACT Objective: To evaluate the effects of modified bonded rapid maxillary expansion (RME) on occlusal force distribution. Materials and Methods: The sample included 12 patients (7 girls and 5 boys; mean age: 13.1 years) at the permanent dentition stage with bilateral posterior cross-bite. The patients were treated with a modified bonded RME appliance, activated twice a day. The study was terminated when the palatal cusps of the maxillary posterior teeth were occluding with the buccal cusps of the mandibular posterior teeth. The postretention period was 3 months. The T-Scan III device was used to analyze the percentages of occlusal force distribution, and records were taken at the pretreatment (T1), the postreatment (T2), and the postretention (T3) periods. Wilcoxon signed rank test was used for statistical analyses. Results: Incisors were most frequently without contact, followed by canines. The highest forces were seen in the second and first molar regions. A significant decrease was seen in total occlusal force during treatment (T1–T2); however, during retention, the force returned to its initial value, and no significant differences were found (T1–T3). No differences were found between right and left sides and in occlusal forces of the teeth in all time periods. Conclusion: The use of modified bonded RME decreases the total occlusal forces during the treatment period, but it does returns to its initial value after the postretention period.

scholarly journals Three-dimensional evaluation of hybrid expander appliances: A pilot study

2015 ◽  
Vol 86 (1) ◽  
pp. 81-86 ◽  
Author(s):  
Mehmet Akin ◽  
Yasin Erdem Akgul ◽  
Zehra Ileri ◽  
Faruk Ayhan Basciftci
Keyword(s):  
Three Dimensional ◽  
Three Dimensions ◽  
Cone Beam ◽  
Rank Test ◽  
Maxillary Expansion ◽  
Maxillary Central Incisor ◽  
Dimensional Changes ◽  
Signed Rank ◽  
Signed Rank Test ◽  
Molar Teeth

ABSTRACT Objective:  To evaluate transverse dimensional changes in dentoalveolar and skeletal structures caused by hybrid expander, using cone-beam computed tomography (CBCT). Materials and Methods:  The CBCT records of nine patients (five boys and four girls) (mean age 13.61 ± 0.72 years) treated with hybrid expander were examined. CBCT images were taken at pretreatment and after the expansion. ELSA (point equidistant to both foramina spinosa) was determined as a reference point to compare the distances in all three dimensions. Nineteen transversal dimensions and four angles were measured for both right and left sides. Wilcoxon signed rank test was used for statistical comparison at P &lt; .05 levels. Results:  A V-shaped expansion of suture was successfully achieved in all patients without teeth support. The amount of opening was greater in anterior than posterior and in inferior than superior. An 8.75-mm screw expansion was achieved for all patients. Expansion effects reverberated to maxillary central incisor, canine, first premolar, and first molar at 70%, 75%, 92%, and 89%, respectively. The molar teeth tipped buccally (right 3.06° and left 3.24°) as did premolars (right 2.88° and left 3.02°). Conclusion:  The hybrid expander, minimally invasive expansion appliance that protects teeth by including bone support, can be used easily for rapid maxillary expansion treatment.

scholarly journals Rapid Maxillary Expansion Affects the Spheno-occipital Synchondrosis in Youngsters

2010 ◽  
Vol 80 (1) ◽  
pp. 106-110 ◽  
Author(s):  
Rosalia Leonardi ◽  
Alice Cutrera ◽  
Ersilia Barbato
Keyword(s):  
Multidetector Ct ◽  
Active Phase ◽  
Data File ◽  
Rapid Maxillary Expansion ◽  
Rank Test ◽  
Maxillary Expansion ◽  
Signed Rank ◽  
Mean Width ◽  
Signed Rank Test ◽  
Maxillary Deficiency

Abstract Objective: To test the null hypothesis that the spheno-occipital synchondrosis does not show bony displacement in response to rapid maxillary expansion (RME) therapy in youngsters. Materials and Methods: A total of 16 computed tomography (CT) records were taken from 8 growing patients (2 males and 6 females), before (T0) and after (T1) treatment with RME. All patients had been diagnosed originally with transverse maxillary deficiency. The mean chronological age of the patients was 9.8 ± 1.8 years (range, 8 to 11.4 years). High-resolution multislice multidetector CT was used to study quantitatively the extent of the opening of the spheno-occipital synchondrosis following RME. A low-dose CT scan protocol was used (80 kV, 10 mA) and the data file of each patient was transferred to a workstation where the anteroposterior width of the spheno-occipital synchondrosis was measured on axial images. Results: Before treatment with RME (T0), the anteroposterior mean width of the spheno-occipital synchondrosis was 1.73 ± 0.46 mm immediately after the active phase of expansion (T1), and the width of the synchondrosis increased to 2.30 ± 0.47. This difference was statistically significant according to the Wilcoxon signed rank test (P &lt; .05). Conclusion: Rapid maxillary expansion leads to a small immediate widening of the spheno-occipital synchondrosis in youngsters.

PENGARUH TIRAH BARING TERHADAP PENURUNAN RASA MUAL PADA KLIEN GASTRITIS DI PELAYANAN KESEHATAN

2019 ◽  
Vol 3 (1) ◽  
pp. 25
Author(s):  
Dewi Nurhanifah ◽  
Desy Noor Latifah Sari ◽  
Rahmawati Rahmawati
Keyword(s):  
Rank Test ◽  
Purposive Sampling ◽  
Signed Rank ◽  
Wilcoxon Signed Rank Test ◽  
Signed Rank Test

Salah satu masalah kesehatan yang sering dialami adalah penyakit gastritis. Gejala yang sering dikeluhkan oleh penderita gastritis adalah mual. Salah satu penatalaksanaan keperawatan yang dapat mengurangi rasa mual adalah tirah baring. Penelitian ini bertujuan untuk mengetahui pengaruh tirah baring terhadap penurunan rasa mual pada klien gastritis di Pelayanan Kesehatan. Metode penelitian menggunakan eksperimental dengan bentuk penelitian one group pretest-posttest design. Populasi dan sampel adalah klien yang mengalami mual di Wilayah Kerja Puskesmas  yang berjumlah 15 orang. Sampel diambil dengan teknik purposive sampling. Alat pengumpul data menggunakan observasi. Analisa data melalui uji Wilcoxon Signed Rank Test. Hasil penelitian menujukkan klien gastritis sebelum tirah baring mengalami mual ringan sebanyak 7 orang (46,7%), sesudah tirah baring mengalami tidak mual sebanyak 7 orang (46,7%). Ada pengaruh tirah baring terhadap penurunan rasa mual pada klien gastritis di Pelayanan Kesehatan (ρ value = 0,001).

Efektifitas Kompres Jahe Merah Hangat Dan Kompres Serai Terhadap Penurunan Intensitas Nyeri Arthritis Remathoid Pada Lanjut Usia Di Desa Mojoranu Kecamatan Dander Kabupaten Bojonegoro

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Ferawato Ferawati
Keyword(s):  
Pain Intensity ◽  
Therapy Group ◽  
The Elderly ◽  
Rank Test ◽  
Test Design ◽  
Signed Rank ◽  
Wilcoxon Signed Rank Test ◽  
Post Test ◽  
Signed Rank Test ◽  
Red Ginger

ABSTRAKReumatoid Artritis (RA) merupakan penyakit muscoloskelektal yang sering terjadi pada usia lanjut. Gangguan pada system muscoloskelektal yang ditandai dengan munculnya nyeri sendi dan kekakuan yang mengakibatkan penurunan kemampuan fisiologis atau kualitas hidup lansia. Dampak dari Reumatoid Artritis dapat menimbulkan beberapa keluhan dan dapat menyebabkan kelumpuhan. Untuk menganalisis efektifitas kompres jahe merah hangat dan kompres serai hangat terhadap penurunan intensitas nyeri artitris remauthoid pada lanjut usia.Metode Penelitian: Jenis penelitian adalah quasy experimental dengan two group pre – post test design. Subjek adalah sebagian lansia yang penderita Arthritis Remathoid di Desa Sumberagung Kecamatan Dander Kabupaten Bojonegoro. Subjek dibagi menjadi dua kelompok yaitu kelompok I (n=15) diberi perlakuan kompres jahe hangat dan II (n=15) diberi perlakuan kompres serai hangat. Analisis yang digunakan uji Mann Whitney U Test dan Wilcoxon Signed Ranks Test dengan ingkat kemaknaan α = 0,05.Hasil uji Wilcoxon Signed Rank Test, didapat keduanya mempunyai nilai kemaknaan yaitu ρ value = 0,000. Nilai ρ = 0,031 pada kelompok kompres serai hangat dan kelompok kompres jahe merah ρ value = 0,165. Hasil uji Mann Withney U Test pada Post perlakuan kedua terapi diperoleh selisih nilai nyeri pada kompres jahe ρ= 0,003 dan selisih nilai nyeri kompres serai ρ value = 0,001.Penggunaan kompres jahe merah lebih efektif dibandingkan dengan kompres serai terhadap penurunan intensitas nyeri arthritis remathoid. Kata Kunci: usia lanjut, Reumatoid Artritis (RA), jahe merah, serai, perbedaan efektifitas.    ABSTRACTReumatoid Artritis (RA) is a musculoskeletal which frequently occurs in the elderly. The disorders in the musculoskeletal system are noted by the occurrence of pain in the joints and stiffness which reduces the physiological abilities or life quality of the elderly. The disease causes many such complaints and  consequences of the disease rheumatoid arthritis may experience paralysis. The aims of this study is to analyze the effect of warm red ginger compress therapy and warm lemongrass compress therapy against of  Decreased pain intensity in  the elderly  with  artitris remauthoid. The study was Queasy experimental with two group pre – post test design. Subjects were some elderly people with Arthritis Remathoid in Sumberagung Village, Dander Sub District, Bojonegoro District. Subjects were divided into two groups: group I (n-15) with warm ginger compress therapy, and II (n=15) with warm lemongrass compress therapy. The analyses used in this study were the Mann Whitney U Test and Wilcoxon Signed Ranks Test with α of 0.05. Results of Wilcoxon Signed Rank Test obtained Both have meaning p value of  0.000. ρ value = 0,031 in a warm lemongrass compress therapy group and obtained of warm ginger compress therapy group ρ value = 0,165. The results of Mann Withney U Test on Post treatment second therapy, obtained difference of warm ginger compress therapy with ρ value= 0,003 and difference of warm lemongrass compress therapy with ρ value = 0,001.The use of warm ginger compresses therapy are more effective than a warm lemongrass compress therapy against decreased pain intensity in  the elderly  with  artitris remauthoid.  Keywords: elderly, artitris remauthoid, red ginger, lemongrass, differences in effectiveness

The Degree of Subjective Complaints of Students Practice in Mechanical Technology Laboratories

2018 ◽  
Vol 4 (1) ◽  
pp. 22
Author(s):  
I Ketut Widana
Keyword(s):  
Engineering Students ◽  
Standing Position ◽  
Statistical Test ◽  
Rank Test ◽  
Cross Sectional ◽  
Signed Rank ◽  
Before And After ◽  
Signed Rank Test ◽  
The Difference ◽  
Paired T Test

The working practice of the engineering students is part of the learning process that is irreducible and indispensable. The composition of  lecturing between theoretical and practical one is 40% to 60%. With this condition, the students spend more time at the laboratory. Generally, the students perform in the laboratory work by standing position. The design of research is observational cross-sectional. The method applied is observation, interview and measuring. The subjects of research are practicing students amounting to 21 students. Referring to the analysis of statistical test or Wilcoxon signed ranks test, the difference of effect of work position is significant, namely p < 0.05 towards musculoskeletal disorders (MSDs) before and after working. The quantity of the average complaint after working is score 44.62 ± 9.47. The result of Wilcoxon signed rank test shows that there is significant different effects of standing work position, namely p < 0.05 towards fatigue generally before and after working. The degree of the working pulse is on the average of 110.78  ± 17.80 bpm (beats per minutes) which can be categorized into the medium workload. Using paired t-test, the result is p < 0.05.

PENGARUH PEMBACAAN DZIKIR PADA IBU MELAHIRKAN TERHADAP TINGKAT NYERI INTRA NATAL DI RUMAH BERSALIN FAJAR YOGYAKARTA

2010 ◽  
Vol 1 (1) ◽  
Author(s):  
Sri Sumaryani ◽  
Indri Nurasa
Keyword(s):  
Home Delivery ◽  
Labor Pain ◽  
Rank Test ◽  
Control Group ◽  
Pain Level ◽  
Control Group Design ◽  
Signed Rank ◽  
Wilcoxon Signed Rank Test ◽  
Post Test ◽  
Signed Rank Test

PENGARUH PEMBACAAN DZIKIR PADA IBU MELAHIRKAN TERHADAP TINGKAT NYERI INTRA NATAL DI RUMAH BERSALIN FAJAR YOGYAKARTAEffect of Reading Dhikr Women On The Level Of Birth Pain Intra Christmas At Home Delivery Dawn YogyakartaSri Sumaryani1 & Indri Nurasa21, 2)Program Studi Ilmu Keperawatan Fakultas Kedokteran Universitas Muhammadiyah YogyakartaJl. Lingkar Barat Taman Tirto Kasihan Bantul Yogyakarta 55182*)e-mail: [email protected] atau yang biasa disebut dengan proses persalinan merupakan suatu proses membuka dan menipisnya serviks, dan janin turun ke dalam jalan lahir. Gejala awal persalinan akan menimbulkan nyeri yang sangat hebat karena adanya kontraksi uterus dan otot abdomen. Nyeri intra natal adalah suatu nyeri yang dirasakan saat terjadinya proses persalinan (melahirkan). Saat nyeri persalinan muncul, ada baiknya bagi ibu untuk membaca dzikir. Dzikir adalah mengingat Allah SWT dan menghadirkan apa yang tadinya ada di dalam benak untuk kemudian dilafadzkan atau disebut-sebut yang dapat dilakukan secara lisan dengan menggunakan lidah atau bisa juga diucapkan tanpa adanya keterlibatan lidah, yaitu melalui hati. Penelitian ini bertujuan untuk mengetahui pengaruh pembacaan dzikir pada ibu melahirkan terhadap tingkat nyeri intra natal. Teknik pengambilan sampel menggunakan purposive sampling. Desain penelitian pra eksperimen, dengan rancangan pre test-post test tanpa kelompok kontrol. Sampel penelitian berjumlah 30 responden. Pengumpulan data dilakukan dengan observasi langsung kepada responden untuk mengukur tingkat nyeri. Analisa data menggunakan uji statistik wilcoxon signed rank test dan regresi linier dengan menggunakan SPSS 14. Hasil penelitian menunjukkan bahwa hasil uji statistik untuk nilai pre test dan post test tingkat nyeri diperoleh nilai signifikansi 0,02 dengan p < 0,05.Kata kunci: pembacaan dzikir, melahirkan, nyeri intra natal, tingkat nyeriABSTRACTThe delivery or usually called labor process is a process open and thin the cervix, and descent of the fetus into the way of birth. The early symptom of delivery will be appearing very heavy because there are uterus contraction and abdomen muscle. In partum pain is a pain which feel when delivery process happening (labor). When labor pain appears, there is a good for the mother to read dzikir. Dzikir is remembering Allah SWT and make present what before in the mind and then pronounced or make cal can do spoken by tongue or pronounced without there are involving tongue, by heart. The purpose of this research is to know about the influence of reading dzikir to the delivery mother toward in partum level of pain. Technique sampling used purpose sampling. The research of design pre experiment, with pre test-post test without control group design. The sample in this research’s total is 30 respondents. The manner of data was did by direct observation to the respondents to measure pain level. Data analysis used statistic test wilcoxon signed rank test and regression linier in SPSS 14. The results of research showed that results of the statistic pretest and posttest of pain level show significance value 0,02 with p < 0,05.Keywords: reading dzikir, delivery, in partum pain, pain level

scholarly journals Evaluation of Intraocular Pressure and Other Biomechanical Parameters to Distinguish between Subclinical Keratoconus and Healthy Corneas

2021 ◽  
Vol 10 (9) ◽  
pp. 1905
Author(s):  
Cristina Peris-Martínez ◽  
María Amparo Díez-Ajenjo ◽  
María Carmen García-Domene ◽  
María Dolores Pinazo-Durán ◽  
María José Luque-Cobija ◽  
...  
Keyword(s):  
Function Theory ◽  
Rank Test ◽  
Maximum Deformation ◽  
Corrected Visual Acuity ◽  
Signed Rank ◽  
Signed Rank Test ◽  
Biomechanical Parameters ◽  
Spss Software ◽  
Biomechanical Measurements ◽  
Noncontact Tonometry

(1) Purpose: To assess the main corneal response differences between normal and subclinical keratoconus (SCKC) with a Corvis® ST device. (2) Material and Methods: We selected 183 eyes of normal patients, of a mean age of 33 ± 9 years and 16 eyes of patients with SCKC of a similar mean age. We measured best corrected visual acuity (BCVA) and corneal topography with a Pentacam HD device to select the SCKC group. Biomechanical measurements were performed using the Corvis® ST device. We carried out a non-parametric analysis of the data with SPSS software (Wilcoxon signed rank-test). (3) Results: We found statistically significant differences between the control and SCKC groups in some corneal biomechanical parameters: first and second applanation time (p = 0.05 and p = 0.02), maximum deformation amplitude (p = 0.016), highest concavity radius (p = 0.007), and second applanation length and corneal velocity ((p = 0.039 and p = 0.016). (4) Conclusions: Our results show that the use of normalised biomechanical parameters provided by noncontact tonometry, combined with a discriminant function theory, is a useful tool for detecting subclinical keratoconus.

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