scholarly journals Fractal analysis as a useful predictor for determining osseointegration of dental implant? A retrospective study

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Emrah Soylu ◽  
Aykağan Coşgunarslan ◽  
Selin Çelebi ◽  
Damla Soydan ◽  
Ahmet Emin Demirbaş ◽  
...  
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
Fractal Analysis ◽  
Treatment Time ◽  
Old Patients ◽  
Box Counting ◽  
Total Treatment Time ◽  
Total Treatment ◽  
Dental Radiographs ◽  
The Mean

Abstract Purpose The present study aimed at evaluating the effectiveness of fractal analysis on determining the osseointegration of dental implants. Material and methods In a single center, retrospective clinical trial, patients with dental implants in the mandibular premolar/molar region, ASA I–II and < 65-year-old patients were included. Orthopantomograph (OPG) were taken before implant surgery (t0), within a week of surgery (t1), and 1 (t2) and 2 (t3) months after surgery, respectively. Three regions of interest (ROIs) from mesial, distal, and apical sites of the implants were chosen and fractal analysis (FA) was conducted with the box-counting algorithm using White and Rudolph’s method. Results A total of 39 patients 19 women and 20 men, with a mean age of 52.2 years (52.3 and 52.1 years, respectively) were included. The mean, minimum and maximum values of mesial (roi1), distal (roi2), and apical (roi3) surfaces were compared. The fractal dimension (FD) values of t1 were significantly lower compared with t0 as they decreased during the first week. FD values gradually increased after the first week although never exceeded the FD values of t0. Also, difference between mean FD values of t0 and t3 were found statistically significant (p < 0.05). Discussion FA is a promising and noninvasive method to predict osseointegration of a dental implant based on dental radiographs, and it can help shorten the total treatment time.

scholarly journals Immediate orthodontic load on dental implants: an option for adult treatment

2019 ◽  
Vol 24 (6) ◽  
pp. 69-79
Author(s):  
José Augusto Mendes Miguel ◽  
Tatiana Ettore do Valle de Sousa Freitas
Keyword(s):  
Dental Implants ◽  
Multidisciplinary Approach ◽  
Treatment Time ◽  
Prosthetic Rehabilitation ◽  
Posterior Teeth ◽  
Endosseous Implants ◽  
Orthodontic Movement ◽  
Total Treatment Time ◽  
Total Treatment ◽  
Orthodontic Treatment In Adults

ABSTRACT The demand for orthodontic treatment in adults has been increasing. However, these patients often require a multidisciplinary approach, due to the lack of posterior teeth, requiring additional anchorage. The skeletal anchorage by endosseous implants is an option, since they may be used later for prosthetic rehabilitation. The application of immediate load on these appliances for orthodontic movement may reduce the costs and total treatment time. This paper discusses the utilization of endosseous dental implants with immediate load for absolute anchorage for orthodontic movement, with later utilization for prosthetic rehabilitation.

scholarly journals Formation of Thermal Lesions in Tissue and Its Optimal Control during HIFU Scanning Therapy

Symmetry ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1386
Author(s):  
Xiao Zou ◽  
Shengyou Qian ◽  
Qiaolai Tan ◽  
Hu Dong
Keyword(s):  
Optimal Control ◽  
Treatment Time ◽  
Heating Time ◽  
Temperature Elevation ◽  
Acoustic Intensity ◽  
Thermal Lesions ◽  
Total Treatment Time ◽  
Total Treatment ◽  
The Mean ◽  
Historical Temperature

A high intensity focused ultrasound (HIFU) scanning approach is needed to obtain multiple treatment spots for the ablation of large volume tumors, but it will bring some problems such as longer treatment times, the inhomogeneity of temperature and thermal lesions in tissues. Although some optimal control methods have been proposed, it is difficult to take into account the uniformity, efficiency and entirety of thermal lesions. In this study, based on the Helmholtz equation and Pennes’ bio-heat transfer equation, a coupled acoustic-thermal field model is proposed to investigate the relationship between temperature elevation, thermal lesions and neighboring treatment spots, and to analyze the effects of the heating time and acoustic intensity on thermal lesions by the finite element method (FEM). Consequently, optimal control schemes for the heating time and acoustic intensity based on the contribution from neighboring treatment spots to thermal lesions are put forward to reduce treatment times and improve the uniformity of temperature and thermal lesions. The simulation results show that the peak historical temperature elevation on one treatment spot is related to the number, distance and time interval of its neighboring treated spots, and the thermal diffusion from the neighboring untreated spots can slow down the drop of temperature elevation after irradiation, thus both of them affect the final shape of the thermal lesions. In addition, increasing the heating time or acoustic intensity of each treatment spot can expand the overall area of thermal lesions, but it would aggravate the elevation and nonuniformity of the temperature of the treatment region. Through optimizing the heating time, the total treatment time can be reduced from 249 s by 17.4%, and the mean and variance of the peak historical temperature elevation can decrease from 44.64 °C by 13.3% and decrease from 24.6317 by 45%, respectively. While optimizing the acoustic intensity, the total treatment time remains unchanged, and the mean of the peak historical temperature elevation is reduced by 4.3 °C. Under the condition of the same thermal lesions, the optimized schemes can reduce the treatment time, lower the peak of the temperature on treatment spots, and homogenize the temperature distributions. This work is of practical significance for the optimization of a HIFU scanning therapy regimen and the evaluation of its treatment effect.

scholarly journals The Effect of Different Socket Types on Implant Therapy While Using Flapless Ridge Preservation

2021 ◽  
Vol 11 (3) ◽  
pp. 970
Author(s):  
Li-Ching Chang ◽  
Yu-Min Cheng
Keyword(s):  
Soft Tissue ◽  
Dental Implant ◽  
Treatment Time ◽  
Class Ii ◽  
Class I ◽  
Ridge Preservation ◽  
Implant Survival ◽  
Total Treatment Time ◽  
Total Treatment ◽  
Implant Therapy

This retrospective study compared the effects of different extraction sockets when using flapless ridge preservation during dental implant therapy. The extraction sockets were divided into four groups: Class I, intact soft tissue wall and bone walls; Class II, intact soft tissue wall with the destruction of at least one bone wall; Class III, the recession of all soft tissue walls by ≤5 mm; and Class IV, the recession of at least one soft tissue wall by >5 mm. We compared clinical parameters of dental implant therapy using flapless ridge preservation among these groups. Seventy patients with 92 dental implants, including 53 maxillary and 39 mandibular implants, involving flapless ridge preservation were enrolled. The implant survival rate was not affected by socket morphology. Total treatment time from extraction to final prosthesis placement was significantly longer in Class II and III than in Class I, among the maxillary sockets. However, there was no significant difference in the total treatment time among the different groups in the mandible. Therefore, implant survival rates did not differ according to socket morphology; however, total treatment time was significantly affected by socket morphology in the maxilla and was longer in socket classes associated with periodontitis.

Vital Tooth Whitening Techniques. A literature Review

2020 ◽  
Vol 02 ◽  
Author(s):  
Pia Chatterjee Kirk
Keyword(s):  
Soft Tissues ◽  
Treatment Time ◽  
Tooth Bleaching ◽  
Tooth Whitening ◽  
Easy Method ◽  
Tooth Structure ◽  
Dental Esthetics ◽  
Total Treatment Time ◽  
Restorative Materials ◽  
Total Treatment

Background: Vital tooth whitening has become an integral part of esthetic dentistry and remains one of the safest and most economic options today to improve dental esthetics without removing tooth structure. The tooth whitening materials have evolved into three categories: dentist-prescribed/dispensed (in office and patient home-use), and over-thecounter purchased and applied by patients. Objective: This review outlines the latest advances in dentist prescribed vital teeth whitening techniques, effects on tooth structure, soft tissues, and dental restoratives. Areas requiring additional research are also discussed. Methods: Electronic and manual literature search was conducted for key words such as tooth bleaching, and dental bleaching techniques using PubMed/MEDLINE, followed by manual selection of the studies that included whitening procedures in vital teeth. Results: The two main whitening agents are carbamide peroxide (CP) and hydrogen peroxide (HP or H2O2) whose concentration, duration of contact, and total treatment time can alter results. In addition, factors including the type of stain, and age of patient can affect results. Although whitening agents can affect tooth structure, restorative materials, and gingival tissues, the changes are temporary or can be treated using minimally invasive techniques. Conclusion: Areas requiring further research include the actual mechanism of whitening, its effect on tooth structure and restorative materials, and the development of an easy method to quantitate the degree of whitening in the dental office.

scholarly journals Bimaxillary Protrusion - A Case Report

2019 ◽  
Vol 7 (1) ◽  
pp. 70-73
Author(s):  
Hemant Kumar Halwa ◽  
Sumit Kumar Yadav ◽  
Kishor Dutta ◽  
Sandeep Kumar Gupta ◽  
Raju Shrestha ◽  
...  
Keyword(s):  
Case Report ◽  
Orthodontic Treatment ◽  
Treatment Time ◽  
Facial Appearance ◽  
Total Treatment Time ◽  
Total Treatment ◽  
Bimaxillary Protrusion ◽  
Maximum Anchorage

Correction of a severe bimaxillary protrusion with maximum anchorage can be challenging. This case report describes the treatment of a girl with a bimaxillary protrusion. Orthodontic treatment included extraction of her 4 first premolars. The total treatment time was 18 months. Her dental proclination and facial appearance was significantly improved.

scholarly journals A Simplified Three Isocenter IMRT for Craniospinal Irradiation to Minimize Total Treatment Time

2015 ◽  
Vol 93 (3) ◽  
pp. E458
Author(s):  
I. Takahashi ◽  
K. Kashiwado ◽  
N. Sumida ◽  
T. Ubagai ◽  
H. Kakizawa ◽  
...  
Keyword(s):  
Treatment Time ◽  
Craniospinal Irradiation ◽  
Total Treatment Time ◽  
Total Treatment

scholarly journals The efficacy of the figure-of-eight suture technique in the treatment of tunnel bleeding of the femoral artery route after percutaneous coronary intervention or angiography

2020 ◽  
Vol 48 (8) ◽  
pp. 030006052094730
Author(s):  
Ya Huang ◽  
Jing-Guo Nong ◽  
Qiao Xue ◽  
Quan-Zhou Feng ◽  
Cai-Yi Lu
Keyword(s):  
Percutaneous Coronary Intervention ◽  
Femoral Artery ◽  
Treatment Time ◽  
Coronary Intervention ◽  
Suture Technique ◽  
Manual Compression ◽  
Performance Time ◽  
Total Treatment Time ◽  
Percutaneous Coronary ◽  
Total Treatment

Objective To evaluate the efficacy of the figure-of-eight (FOE) suture technique in the treatment of tunnel bleeding after femoral artery puncture compared with manual compression (MC). Methods This prospective, randomized, controlled study enrolled patients that had received transfemoral coronary artery angiography or percutaneous coronary intervention and then developed tunnel bleeding. They were randomly assigned into two groups: FOE suture group (ES group) and manual compression group (MC group). Total treatment time, performance frequency, performance time, rate of deep vein thrombosis (DVT) and in-hospital time after the procedure were compared. Results A total of 152 patients were enrolled in the study (ES group, n = 63; MC group, n = 89). Compared with the MC group, the total treatment time (mean ± SD: ES 22.3 ± 5.4 h versus MC 26.8 ± 6.8 h), performance frequency (mean ± SD: ES 2.1 ± 0.7 versus MC 2.6 ± 1.1), performance time (mean ± SD: ES 8.9 ± 2.5 min versus MC 12.3 ± 4.1 min), in-hospital time after the procedure (mean ± SD: ES 3.5 ± 1.2 days versus MC 4.8 ± 2.1 days) and DVT rate (ES 0.0% versus MC 6.7%) were significantly lower in the ES group. Conclusion The FOE suture technique effectively treated tunnel bleeding after femoral artery puncture.

scholarly journals Combining different treatment philosophies and techniques to reach the desired treatment goal using butterfly system-customizing orthodontic treatment

2017 ◽  
Vol 5 (1) ◽  
pp. 68
Author(s):  
Dhaval Lekhadia
Keyword(s):  
Orthodontic Treatment ◽  
Treatment Time ◽  
Class Ii ◽  
Total Treatment Time ◽  
Initial Stage ◽  
Total Treatment ◽  
Tongue Thrust ◽  
Implant Anchorage ◽  
Extraction Treatment ◽  
Selection Of

This case report describes the orthodontic treatment of an 18-year-old male patient who presented with Straight profile; tongue thrust habit, proclined upper incisors, generalised spacing in upper and lower arches, Katz's class II premolar relation unilaterally, class II canine relation unilaterally with increased overjet and overbite. A butterfly system was used in the treatment combined with frictionless biomechanics in the initial stage of treatment followed by continuous arch mechanics in the later part of treatment. A tongued crib was used to stop the tongue thrust habit along with one elastic swallow exercise. Micro-implant anchorage was used unilaterally in the upper arch for retraction of the entire segment and correction of the unilateral class II canine and premolar relationship. To avoid a dished in profile, a non-extraction treatment was executed. Final corrections of distally tipped canines were achieved using conventional Begg’s  uprighting auxiliaries in the vertical slots of butterfly system in the finishing stage. The case was finished using bite settling elastics. Total treatment time was 1 year 2 months. Aesthetic and functional goals were achieved satisfactorily with proper selection of biomechanics.

scholarly journals Impact of Overall Treatment Time on Survival and Local Control in Patients With Anal Cancer: A Pooled Data Analysis of Radiation Therapy Oncology Group Trials 87-04 and 98-11

2010 ◽  
Vol 28 (34) ◽  
pp. 5061-5066 ◽  
Author(s):  
Edgar Ben-Josef ◽  
Jennifer Moughan ◽  
Jaffer A. Ajani ◽  
Marshall Flam ◽  
Leonard Gunderson ◽  
...  
Keyword(s):  
Radiation Therapy ◽  
Anal Cancer ◽  
Detrimental Effect ◽  
Treatment Time ◽  
Radiation Therapy Oncology Group ◽  
Local Failure ◽  
Oncology Group ◽  
Total Treatment Time ◽  
Total Treatment ◽  
N Stage

Purpose To determine whether increased duration of radiation therapy (RT) and overall treatment (RX) time has a detrimental effect in anal cancer. Patients and Methods Data from Radiation Therapy Oncology Group (RTOG) 87-04 and RTOG 98-11 trials were combined to form three treatment groups: RT/fluorouracil (FU)/mitomycin (n = 472), RT/FU/cisplatin (n = 320), and RT/FU (n = 145). Cox proportional hazards models were used with the following variables: RT duration, RT intensity, RX duration, treatment group, age, sex, Karnofsky performance score (KPS), T stage, N stage, and RT dose. Results In the univariate analysis, there was a significant association between RX duration and colostomy failure (CF; hazard ratio [HR] = 1.51; 95% CI, 1.07 to 2.14; P = .02), local failure (HR = 1.52; 95% CI, 1.14 to 2.03; P = .005), locoregional failure (HR = 1.51; 95% CI, 1.15 to 1.98; P = .003), and time to failure (HR = 1.40; 95% CI, 1.10 to 1.79; P = .007). The significance of RX duration was maintained after adjusting for treatment group. In multivariate modeling there was a trend toward an association between RX duration and CF (HR = 1.57; 95% CI, 0.98 to 2.50; P = .06) and a statistically significant association with local failure (HR = 1.96; 95% CI, 1.34 to 2.87; P = .0006). Age, sex, KPS, T stage, N stage, and RT dose, but not RT duration, RT intensity, or RX duration, were found to be statistically significant predictors of OS and colostomy-free survival. Conclusion Total treatment time, but not duration of radiation therapy, seems to have a detrimental effect on local failure and colostomy rate in anal cancer. Induction chemotherapy may contribute to local failure by increasing total treatment time.

Total Treatment Time Verification for the Contura™ Multilumen Balloon

Brachytherapy ◽  
2010 ◽  
Vol 9 ◽  
pp. S83
Author(s):  
Zoubir Ouhib ◽  
Andreas Kyriacou ◽  
Benjamin S. Suutari
Keyword(s):  
Treatment Time ◽  
Total Treatment Time ◽  
Total Treatment
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