scholarly journals Evaluation of an automated superimposition method for computer-aided cephalometrics

2020 ◽  
Vol 90 (3) ◽  
pp. 390-396 ◽  
Author(s):  
Jun-Ho Moon ◽  
Hye-Won Hwang ◽  
Shin-Jae Lee
Keyword(s):  
Statistical Difference ◽  
T Test ◽  
Error Range ◽  
Anterior Nasal Spine ◽  
Landmark Identification ◽  
Computer Aided ◽  
Clinically Significant ◽  
Paired T Test

ABSTRACT Objectives To evaluate a new superimposition method compatible with computer-aided cephalometrics and to compare superimposition error to that of the conventional Sella-Nasion (SN) superimposition method. Materials and Methods A total of 283 lateral cephalometric radiographs were collected and cephalometric landmark identification was performed twice by the same examiner at a 3-month interval. The second tracing was superimposed on the first tracing by both the SN superimposition method and the new, proposed method. The proposed method not only relied on SN landmarks but also minimized the differences between four additional landmarks: Porion, Orbitale, Basion, and Pterygoid. The errors between the landmarks of the duplicate tracings oriented by the two superimposition methods were calculated at Anterior Nasal Spine, Point A, Point B, Pogonion, and Gonion. The paired t-test was used to find any statistical difference in the superimposition errors by the two superimposition methods and to investigate whether there existed clinically significant differences between the two methods. Results The proposed method demonstrated smaller superimposition errors than did the conventional SN superimposition method. When comparisons between the two superimposition methods were made with a 1-mm error range, there were clinically significant differences between them. Conclusions The proposed method that was compatible with computer-aided cephalometrics might be a reliable superimposition method for superimposing serial cephalometric images.

scholarly journals In Vitro Comparison of Marginal and Internal Fit of Zirconia Copings Fabricated by One CAD/CAM System with Two Different Scanners

2021 ◽  
Author(s):  
Zahra Khamverdi1 ◽  
Elmira Najafrad ◽  
Maryam Farhadian
Keyword(s):  
T Test ◽  
Marginal Fit ◽  
Significant Difference ◽  
Computer Aided ◽  
Cad Cam ◽  
Zirconia Crowns ◽  
Monolithic Zirconia ◽  
The Mean ◽  
Internal Fit ◽  
Paired T Test

Objectives: Marginal and internal fit of restorations are two important clinical factors for assessing the quality and durability of computer-aided design/computer-aided manufacturing (CAD/CAM)-fabricated monolithic zirconia restorations. The purpose of this study was to evaluate the marginal and internal fit of CAD/CAM zirconia crowns with two different scanners (i3D scanner and 3Shape D700). Materials and Methods: Twelve extracted sound human posterior teeth were prepared for full zirconia crowns. Two different extraoral scanners namely i3D scanner and 3Shape D700 were used to digitize type IV gypsum casts poured from impressions. The crowns were milled from presintered monolithic zirconia blocks by a 5-axis milling machine. The replica technique and MIP4 microscopic image analysis software were utilized to measure the marginal and internal fit by a stereomicroscope at ×40 magnification. The collected data were analyzed by paired t-test. Results: The mean marginal gap was 203.62 μm with 3Shape D700 scanner and 241.07 μm with i3D scanner. The mean internal gap was 192.30 μm with 3Shape D700 scanner and 196.06 μm with i3D scanner. The results of paired t-test indicated that there was a statistically significant difference between the two scanners in marginal fit (P=0.04); while, there was no statistically significant difference in internal fit (P=0.761). Conclusion: Within the limitations of this study, the results showed that type of extraoral scanner affected the marginal fit of CAD/CAM fabricated crowns; however, it did not have a significant effect on their internal fit.

scholarly journals An evaluation of the reproducibility of landmark identification in traditional versus computer-assisted digital cephalometric analysis system

2015 ◽  
Vol 5 ◽  
pp. 103-110
Author(s):  
Manish Suresh Agrawal ◽  
Jiwan Asha Manish Agrawal ◽  
Vivek Patni ◽  
Lalita Nanjannawar
Keyword(s):  
Statistical Significance ◽  
T Test ◽  
Reliability Coefficient ◽  
Computer Assisted ◽  
Cephalometric Analysis ◽  
Landmark Identification ◽  
Lateral Cephalograms ◽  
Analysis System ◽  
Cephalometric Measurements ◽  
Paired T Test

Objective To determine the reliability of Computer Assisted Digital Cephalometric Analysis System (CADCAS) in terms of landmark identification on the values of cephalometric measurements in comparison with those obtained from original radiographs. Materials and Methods The study material consisted of Twenty five lateral cephalograms selected randomly, 16 cephalometric points together with 10 angular and 5 linear cephalometric measurements. The landmarks were manually picked on the tracing & the measurements of X &Y axis done with reference grid. The same tracing was digitized & image loaded in the software (ViewBox 3.1.1) was checked for the magnification (metal ruler) & distortion. The second part of the study compared manual and the CADCAS since the landmarks were manually digitized on screen as against the manually picked ones on the tracing paper. The x and y-coordinates for 16 landmarks were measured, mean and standard deviation calculated, linear and angular measurements compared. Statistical Analysis A paired t-test was done to calculate the statistical significance of the differences. Intraclass reliability coefficient (signifying reproducibility) of the variable was recorded. The observations were tabulated and analysis was done using the paired t test at a P value <0.05. Results Out of 47 variables looked for, 21 showed statistical significance. Direct digitization onscreen (CADCAS) was the quickest and least tedious method. CADCAS was unreliable with linear measurements involving bilateral structures such as Gonion & Articulare. Conclusions Both the methods are equally reliable and reproducible. The intra-class reliability coefficient of all variables differed only slightly, which is not clinically significant.

Comparison of theophylline concentrations in venous blood and capillary blood in asthmatic children.

1979 ◽  
Vol 25 (10) ◽  
pp. 1837-1839 ◽  
Author(s):  
G S Umstead ◽  
J P Rosen
Keyword(s):  
Statistical Difference ◽  
Venous Blood ◽  
Capillary Blood ◽  
T Test ◽  
Serum Concentrations ◽  
Theophylline Concentration ◽  
Asthmatic Children ◽  
Capillary Method ◽  
The Mean ◽  
Paired T Test

Abstract Twenty children, five to 16 years old, diagnosed as having asthma, were studied to compare the serum concentrations of theophylline obtained by standard venipuncture with capillary concentrations obtained by finger lancet. The mean theophylline concentration in venous samples was 9.27 mg/L and in capillary samples was 9.26 mg/L. Comparison by the paired t-test showed no statistical difference between kinds of samples. When surveyed as to their preference, nine patients preferred the venous method, five the capillary method, and six had no preference.

The Lyapunov Exponent of the EEG after Administration of Topiramate

2005 ◽  
Vol 36 (3) ◽  
pp. 202-206 ◽  
Author(s):  
J.C. Li ◽  
W.W. Wang ◽  
Y. H. Wang ◽  
X. Wu
Keyword(s):  
Lyapunov Exponent ◽  
Nonlinear Analysis ◽  
Statistical Difference ◽  
Healthy Adults ◽  
T Test ◽  
Test Results ◽  
Eeg Activity ◽  
Analysis Methods ◽  
Paired T Test

The objective of our study was to investigate the effect of topiramate (TPM) on the Lyapunov exponent of EEG by means of quantitative pharmacoelectroencephalography (QPEEG) and nonlinear analysis methods. One dose of TPM was administrated to epileptics and healthy adults. EEG samples were obtained prior to and at regular intervals (at 0.5, 1, 2, 4, 6, 8, 12, 24 hours) within the 24 hours following the administration of TPM. EEG activity was processed with nonlinear analysis methods. The Lyapunov exponent of the scalp areas was calculated through 60 s epochs without artifacts after each recording. The statistical difference between baseline predrug assessment and each postdrug control was calculated by computing the paired t test. Results showed that the Lyapunov exponent increased first, then decreased, then increased finally. We conclude that TPM can change the complexity of EEG.

The Effect of Aromatherapy by Rose Essence on Anxiety and Physiological Indices of Conscious Patients Admitted at Intensive Care Units

2020 ◽  
Vol 24 (3) ◽  
Author(s):  
Negar Zare ◽  
Maryam Shahabinejad ◽  
Tabandeh Sadeghi
Keyword(s):  
Intensive Care ◽  
Intervention Group ◽  
T Test ◽  
Control Group ◽  
Arterial Blood ◽  
Physiological Indices ◽  
Significant Difference ◽  
Before And After ◽  
Clinically Significant ◽  
Paired T Test

Background: Anxiety in patients admitted at the Intensive Care Unit (ICU) is common and usually moderate or severe. Anxiety affects endocrine and physiological responses. Objectives: This study aimed to determine the effect of aromatherapy by rose essence on anxiety and physiological indices of conscious patients admitted at ICU. Methods: In this clinical trial, 60 conscious patients admitted at ICU wards in Ali Ibn Abi Talib Hospital of Rafsanjan were selected and randomly allocated into two groups of intervention and control. In the intervention group, three drops of 10% rose essence were poured on the gauze and placed 20 cm from the patients’ nose on their shirt, and the patients inhaled it for 20 minutes three times a day. In the control group, three drops of distilled water were used likewise. Data collection tools included Spielberger State-Trait Anxiety Inventory (STAI) and the demographic questionnaire. Data were analyzed using SPSS V.18. Results: According to the results, in the intervention group, the systolic and diastolic blood pressure significantly increased (paired t-test, P < 0.05) in the second time after the intervention and significantly decreased (paired t-test, P < 0.05) in the third time. The mean oxygen saturation of arterial blood also significantly increased in the second time in this group after the intervention (paired t-test, P = 0.001). However, there was no significant difference in anxiety score before and after the intervention in each group. Conclusions: Although aromatherapy using rose essence was statistically significant on some of the physiological indices of conscious patients in ICU, these differences were not clinically significant.

Efektivitas Aroma Terapi Lemon untuk Menangani Emesis Gravidarum

2019 ◽  
Vol 11 (4) ◽  
pp. 277-284
Author(s):  
Vitrianingsih Vitrianingsih ◽  
Sitti Khadijah
Keyword(s):  
Pregnant Women ◽  
Sampling Technique ◽  
T Test ◽  
The Body ◽  
Nausea And Vomiting ◽  
P Value ◽  
Purposive Sampling ◽  
Body Tissues ◽  
Quasi Experimental ◽  
Paired T Test

Studi memperkirakan emesis gravidarum terjadi pada 50-90% kehamilan. Mual muntah pada kehamilan memberikan dampak yang signifikan bagi tubuh dimana ibu menjadi lemah, pucat dan cairan tubuh berkurang sehingga darah menjadi kental (hemokonsentrasi). Keadaan ini dapat memperlambat peredaran darah dan berakibat pada kurangnya suplay oksigen serta makanan ke jaringan sehingga dapat membahayakan kesehatan ibu dan janin. Salah satu terapi yang aman dan dapat dilakukan untuk mengurangi keluahan mual muntah pada ibu hamil adalah pemberian aromaterapi lemon. Penelitian bertujuan untuk mengetahui efektifitas aroma terapi lemon untuk menangani emesis gravidarum. Penelitian ini menggunakan rancangan Quasi experiment  dengan  one group pre-post test design. Populasi penelitian adalah ibu hamil yang mengalami emesis gravidarum di Kecamatan Berbah, Sleman. Jumlah sampel 20 ibu hamil trimester pertama yang diambil dengan teknik purposive sampling. Pengukuran mual muntah dilakukan debelum dan setelah  pemberian aromaterapi lemon menggunakan Indeks Rhodes. Analisa data menggunakan uji Paired t-test. Hasil penelitian didapatkan rata-rata skor mual muntah sebelum pemberian aromaterapi lemon berdasarkan Indeks Rhodes pada Ibu Hamil dengan emesis gravidarum yaitu 22,1 dan terjadi penurunan skor setelah pemberian aromaterapi lemon menjadi 19,8. Ada pengaruh pemberian aromaterapi lemon dengan pengurangan mual muntah pada ibu hamil (p-value = 0.017). Berdasarkan hasil penelitian dapat disimpulkan pemberian aromaterapi lemon efektif untuk mengurangi emesis gravidarum pada ibu hamil trimester pertama.  Kata kunci: aromaterapi lemon, emesis gravidarum THE EFFECTIVENESS OF LEMON AROMATHERAPY FOR HANDLING EMESIS GRAVIDARUM   ABSTRACT Studies estimate that nausea and vomiting (emesis gravidarum) occur in 50 – 90% of pregnancies. Nausea and vomiting of pregnancy have a significant impact on the body in which it makes a mother becomes weak, pale, and decreasing body fluid so that the blood becomes thick (hemoconcentration). This situation can slow down blood circulation and inflict the lack of oxygen and food supplies to the body tissues so that it can endanger the health of the mother and fetus. One of the therapies that is safe and can be conducted to reduce nausea and vomiting of pregnancy is by giving the lemon aromatherapy treatment. The research aims to determine the effectiveness of the aroma of lemon therapy to deal with emesis gravidarum. This study applied quasi-experimental research with one group pretest-posttest design. The population of this study was pregnant women who experienced emesis gravidarum. Furthermore, samples were 20 mothers from Berbah, Sleman taken by using a purposive sampling technique. Nausea and vomiting were assessed between before and after giving lemon aromatherapy using the Rhodes Index. The data were analyzed using the paired t-test. The mean score of nausea and vomiting before giving lemon aromatherapy on mother with emesis gravidarum based on the Rhodes Index was 22.1. However, it decreased after given lemon aromatherapy treatment to 19.8. Therefore, there was an effect on giving lemon aromatherapy treatment toward the decrease of nausea and vomiting for pregnant women (p-value = 0.017). Lemon aromatherapy is effective to reduce emesis gravidarum.  Keywords: lemon aromatherapy, emesis gravidarum

PENGARUH PRACTICE BASED SIMULATION MODEL TERHADAP CRITICAL THINKING DI NURSING SKILL LABORATORY

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Retno Issroviatiningrum ◽  
Shanti Wardaningsih ◽  
Novita Kurnia Sari
Keyword(s):  
Critical Thinking ◽  
Simulation Model ◽  
Random Sampling ◽  
Simple Random Sampling ◽  
T Test ◽  
Control Group ◽  
Control Group Design ◽  
Group Design ◽  
Skill Laboratory ◽  
Paired T Test

ABSTRAK Upaya untuk meningkatkan mutu pendidikan keperawatan khususnya untuk mendukung peserta didik menjadi perawat profesional memerlukan proses pembelajaran dengan menggunakan fasilitas keterampilan klinis. Practice based simulation model didasarkan pada teori belajar konstruktif yang menegaskan bahwa pengetahuan tidak pasif ditransfer dari pendidik kepada peserta didik, tetapi dibangun oleh peserta didik melalui pengolahan pengalaman dan interaksi dengan lingkungan mereka. Dengan metode simulasi di laboratorium dapat mendorong mahasiswa untuk menggunakan critical thinking dalam mengambil keputusan dalam mengatasi masalah tanpa merugikan pasien yang sebenarnya. Penelitian ini bertujuan untuk menganalisis pengaruh practice based simulation model terhadap critical thinking pada mahasiswa semester VI di FIK Unissula Semarang. Penelitian ini menggunakan metode Quasy – Experiment dengan pendekatan pretest-posttest with control group design. Pengambilan sampel dengan teknik  simple random sampling dengan jumlah 21 responden baik kelompok intervensi maupun kelompok kontrol. Analisis data menggunakan uji Paired T-Test dan Independent Samples T-Test. Hasil penelitian selisih peningkatan critical thinking pada kelompok intervensi sebanyak 11.95 poin dan pada kelompok kontrol 2.05. Practice based simulation model berpengaruh terhadap critical thinking dengan nilai p=0.00<0.05. Disimpulkan bahwa practice based simulation model mempengaruhi critical thinking pada mahasiswa semester VI FIK Unissula Semarang. Kata kunci: Practice based simulation model, critical thinking

Pengaruh media teka-teki silang terhadap pengetahuan gizi seimbang pada anak sekolah dasar

2019 ◽  
Vol 2 (2) ◽  
pp. 107
Author(s):  
Umi Mahmudah
Keyword(s):  
T Test ◽  
Control Group ◽  
Paired T Test ◽  
Quasi Experiment

Latar Belakang: Anak-anak sekolah dasar merupakan salah satu kelompok rawan masalah gizi, baik pada gizi kurang maupun gizi lebih. Pendidikan gizi seimbang perlu diterapkan untuk mengatasi masalah gizi tersebut. Metode pendidikan mendorong peran serta dan keterlibatan anak untuk memberikan motivasi dalam belajar. Berbagai metode pendidikan yang menarik bagi anak antara lain permainan, tebak-tebakan, diskusi kelompok, serta peragaan. Tujuan: Untuk mengetahui pengaruh pendidikan gizi menggunakan media teka-teki silang (TTS) terhadap pengetahuan gizi seimbang pada anak sekolah dasar. Metode: Penelitian ini merupakan penelitian quasi experiment dengan rancangan pre-posttest with control group. Penelitian dilakukan pada anak Sekolah Dasar Negeri Donohudan I. Pengukuran pengetahuan gizi seimbang dilakukan sebanyak dua kali, yaitu pretest dan posttest. Penelitian ini dibagi menjadi dua kelompok, yaitu kelompok intervensi yang diberikan pendidikan gizi menggunakan teka-teki silang dan kelompok kontrol yang diberikan pendidikan gizi menggunakan ceramah. Pengukuran pengetahuan pretest dilakukan sebelum diberikan pendidikan gizi dan pengukuran pengetahuan posttest diberikan setelah dilakukan pendidikan gizi. Data dianalisis menggunakan Paired T-test dan Independent Sample T-test. Hasil: Terdapat perbedaan pengetahuan sebelum dan setelah dilakukan pendidikan gizi menggunakan media TTS dan media ceramah (p=0,010). Rerata peningkatan pengetahuan gizi menggunakan media TTS lebih tinggi dibandingkan dengan menggunakan metode ceramah pada anak sekolah dasar. Kesimpulan: Ada pengaruh pengetahuan gizi seimbang sebelum dan setelah diberikan pendidikan gizi, baik menggunakan media teka-teki silang maupun menggunakan media ceramah.

LIFE REVIEW THERAPY MENURUNKAN TINGKAT DEPRESI LANSIA PADA WARGA BINAAN SOSIAL DI PANTI SOSIAL TRESNA WERDHA BUDI MULIA 3 JAKARTA SELATAN

2020 ◽  
Vol 15 (2) ◽  
pp. 114-121
Author(s):  
Maryati . ◽  
Eka Rokhmiati Wahyu Purnamasari
Keyword(s):  
Control Design ◽  
Life Review ◽  
T Test ◽  
Post Test ◽  
Life Review Therapy ◽  
Paired T Test ◽  
Quasi Experiment

Life Review Therapy merupakanterapi psikoterapi untuk menyelesaikan masalah pada lansia yang mengalami depresi, mengekspresikan perasaan yang disupresikan sehingga energy psikis tersebut dilepaskan. Tujuan penelitian ini untuk mengetahui pengaruh Life Review Therapy terhadap tingkat depresi lansia pada warga binaan sosial di PSTW Budi Mulia Jakarta Selatan.Metode yang digunakan adalah quasi experiment, dengan pendekatan Pre Test and Post Test Without Control design. Populasi dalam penelitian ini adalah lansia dengan jumlah sampel 20 orang dengan teknik purposivesampling. Analisis data menggunakan Paired T Test dengan tingkat signifikan (α0,05). Hasil menunjukan bahwa ada pengaruh Life Review Therapy terhadap tingkat depresi lansiadengan ρValue=0,000. Berdasarkan penelitian tersebut, terapi Life Reviewterbukti dapat menurunkan tingkat depresi sehingga terapi ini dapat dijadikan salah satu acuan terapi untuk menangani depresi pada lansia di PSTW

PENGARUH HEALTH EDUCATION TERHADAP KEPATUHAN PERILAKU HIDUP BERSI SEHAT (PHBS) WARGA

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Tatiana Siregar ◽  
Nelly Febriani
Keyword(s):  
Health Education ◽  
T Test ◽  
P Value ◽  
Purposive Sampling ◽  
Post Test ◽  
Paired T Test ◽  
Quasi Experiment

Latar belakang: Kondisi sasaran pencapaian Indonesia Sehat 2015 dari program MDG’s yang belum tercapai, sehingga dilanjutkan dengan program SDGs menjadikan Indonesia harus banyak berperan dalam semua kegiatan khsusnya di bidang kesehatan. Proses pencapaian cakupan program kesehatan sangat dipengaruhi oleh Health education yang dilakukan petugas kesehatan kepada warga, kesehatan masyarakat. Tujuan: Penelitain ini bertujuan untuk mengetahui perubahan perilaku hidup bersih sehat yang  dilaksanakan warga setelah diberikan intervesi health education.  Metode: Metode penelitian dilaksanakan secara quasi experiment pre dan post test.  Teknik mengambil sampel secara purposive Sampling pada 30 reponden kelompook intervensi dan 26 responden kelompok kontrol. Analisa data dilakukan secara paired t test. Hasil: Hasil di dapat ada perbedaan yang bermakna antara pengetahuan dan perubahan perilaku hidup bersih sehat repsonden sebelum dan sesudah diberi penyuluhan p value = 0,000. Saran: Diharapkan pemerintah setempat menggerakkan petugas kesehatan bersama-sama dengan warga melakukan perilaku hidup bersih sehat dalam kehidupan sehari-hari dengan memfasilitasi  sarana penunjang untuk menjalankan perilaku hidup bersih sehat, dengan maksimal pada warga. Kata kunci: Health eduation,  Perilaku Hidup Bersih Sehat

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