scholarly journals PRESERVED ALLOPLASTIC MATERIAL IN TREATMENT OF TUMORS AND ODONTOGENIC CYSTS IN CHILDREN

2021 ◽  
pp. 29-33
Author(s):  
P.A. Zhelezny ◽  
◽  
S.P. Zhelezny ◽  
Yu.K. Zheleznaya ◽  
A.P. Zheleznaya ◽  
...  
Keyword(s):  
Odontogenic Cysts ◽  
Orthodontic Appliances ◽  
Facial Aesthetics ◽  
Clinical Observations ◽  
Aesthetic Results ◽  
Near Term ◽  
Removable Orthodontic Appliances ◽  
Jaw Defects

Long-term clinical observations on the treatment and rehabilitation of 117 children with tumors and tumor-like formations of the maxillofacial region are presented. To replace jaw defects, we used transplants preserved in various ways: frozen — in 48 patients, preserved in 0,5% formalin — in 7 patients, Kostma — in 7 pati¬ents, Deprotex — in 28 patients, Orgamax — in 27 patients. In the postoperative period, orthopedic and orthodontic rehabilitation of patients was carried out using removable and non-removable orthodontic appliances and dental implant systems. In the near term, no complications were revealed in 108 patients; consolidation of the graft with the bone bed occurred. 9 patients developed a purulent inflammatory process with allograft sequestration. The follow-ups of the patients showed that after transplantation, the allograft was gradually resorbed and replaced with a full-fledged organotypic regenerate within a period of 1,0 to 3 years. During the long-term up to 10 years follow-up, 92 patients (89,3 %) obtained good anatomical, functional and aesthetic results of rehabilitation, characterized by full restoration of the function of the dentition and facial aesthetics. In 11 patients (10,7 %), the results were satisfactory.

Water Sorption and Solubility of Vanillin-Incorporated Self-Curing Orthodontic Polymethylmethacrylate Resin

2021 ◽  
Vol 1020 ◽  
pp. 187-191
Author(s):  
Thongchai Poonpiriya ◽  
Pornrachanee Sawaengkit ◽  
Pornkiat Churnjitapirom ◽  
Sroisiri Thaweboon
Keyword(s):  
Water Sorption ◽  
Water Solubility ◽  
Sorption Property ◽  
Control Group ◽  
Orthodontic Appliances ◽  
Significance Level ◽  
Group Water ◽  
Removable Orthodontic Appliances ◽  
Pmma Resin

Polymethylmethacrylate (PMMA) resin is one of the most commonly used materials for fabricating the base of removable orthodontic appliances. It is known that PMMA resin can promote the adhesion of microbes due to its surface porosity and from long-term use. Vanillin-incorporated PMMA resin has been reported to have antimicrobial effects against Candida albicans. However, the influence of vanillin incorporation on the water sorption and solubility of self-curing orthodontic PMMA resin has not been studied. Objective: To determine the water sorption and solubility of self-curing orthodontic PMMA resin incorporated with different concentrations of vanillin. Materials and methods: Three groups of self-curing orthodontic PMMA resin incorporated with 0.1% and 0.5% vanillin as well as PMMA without vanillin as a control were prepared with ten specimens per group. Water sorption and solubility tests were performed according to ISO 20795-2:2013 specifications. One-way ANOVA and Tukey’s multiple comparison tests at a p<0.05 significance level were used to analyse the data. Results: All three groups met ISO standard requirements. The means of water sorption values showed insignificant differences among the three groups even though the value of the 0.5% vanillin group tended to decrease. Water solubility of the 0.1% vanillin-incorporated group was not significantly different when compared with the control group whereas that of the 0.5% vanillin-incorporated group exhibited a significant lower value when compared with both control and 0.1% vanillin-incorporated groups. This suggests that increasing concentrations of vanillin would decrease the water solubility of PMMA resin. Conclusion: The incorporation of 0.5% vanillin into self-curing orthodontic PMMA resin could significantly reduce its water solubility and showed a trend of less water sorption property. Even with different vanillin concentrations, the water sorption and water solubility properties of PMMA resin were within the ISO standards. Nevertheless, further studies are recommended to determine the amount of residual monomer present in different concentrations of vanillin-incorporated PMMA resin.

Physical Properties of Vanillin Incorporated Self-Curing Orthodontic Polymethylmethacrylate Resin

2020 ◽  
Vol 853 ◽  
pp. 46-50
Author(s):  
Thongchai Poonpiriya ◽  
Pornrachanee Sawaengkit ◽  
Sroisiri Thaweboon ◽  
Pornkiat Churnjitapirom
Keyword(s):  
Flexural Strength ◽  
Physical Properties ◽  
Flexural Modulus ◽  
Orthodontic Appliances ◽  
Surface Porosity ◽  
Significance Level ◽  
Removable Orthodontic Appliances ◽  
Pmma Resin ◽  
One Way Anova

Polymethylmethacrylate (PMMA) resin is the main polymeric material used in removable orthodontic appliances. However, it can promote the adhesion of microbes due to its surface porosity and from long-term use. While vanillin incorporated PMMA resin has been reported to have antimicrobial effects against Candida albicans, the influence of vanillin incorporation on the physical properties of self-curing orthodontic PMMA resin has not been studied. Objective: To determine the flexural strength and flexural modulus of self-curing orthodontic PMMA resin incorporated with vanillin in different concentrations. Materials and methods: Three groups of self-curing orthodontic PMMA with incorporated vanillin concentrations of 0.1%, 0.5% as well as PMMA without vanillin as a control were prepared with ten specimens per group. Flexural strength and flexural modulus were tested by a 3-point bending machine according to ISO 20795-2:2013 specifications. One-way ANOVA and Tukey’s multiple comparison tests at a p<0.05 significance level were used to analyse the data. Results: The 0.1% vanillin incorporated group met ISO standard requirements (flexural strength = 60.48 MPa, flexural modulus = 1756.60 MPa), while the 0.5% vanillin incorporated group failed to pass this standard (flexural strength = 46.94 MPa, flexural modulus = 1423.49 MPa). The means of both flexural strength and flexural modulus showed significant differences among the three groups. Increasing the concentration of vanillin would decrease the flexural strength and flexural modulus of PMMA resin. Conclusion: The incorporation of vanillin into self-curing orthodontic PMMA resin can affect its physical properties, namely flexural strength and flexural modulus. At a concentration of 0.1% vanillin incorporation, PMMA resin displayed physical properties within the ISO standards.

Effect of Orthodontic Appliances on Oral Microbiota—6 Month Follow-up

2011 ◽  
Vol 35 (4) ◽  
pp. 433-436 ◽  
Author(s):  
Asli Topaloglu-Ak ◽  
Fahinur Ertugrul ◽  
Ece Eden ◽  
Mustafa Ates ◽  
Hakan Bulut
Keyword(s):  
Orthodontic Appliances ◽  
Oral Microbiota ◽  
Chi Square ◽  
Carious Lesions ◽  
Colony Forming Units ◽  
Negative Effect ◽  
Unstimulated Saliva ◽  
Removable Orthodontic Appliances ◽  
Short Time

Objective: This study investigates the effect of fixed and removable orthodontic appliances among children on salivary Streptococcus mutans, Lactobacillus sp. and Candida albicans. Study Design: The study was conducted on 69 patients aged between 6-17 years who used fixed or removable orthodontic appliances. Five ml samples of unstimulated saliva from each patient were collected at baseline and at the 1, 3 and 6 month periodic controls. Samples were diluted and plated on Mitis Salivarus Agar (MSA), Man Rogosa Sharp Agar (MRS) and Saboroud Dextrose Agar (SDA). The growths on the plates were examined under a stereomicroscope. Numbers of colony forming units (CFU) per plate were counted. For statistical analysis,the paired t test and Chi-Square were used. Results: S mutans and Lactobacillus sp counts increased significantly 6 months after the insertion of fixed/removable orthodontic appliances in the oral cavity. A significant increase for C albicans presence was noted after 3 months compared with baseline for fixed appliances.Conclusion: Long-term utilization of orthodontic appliances may have a negative effect on microbial flora and increase the risk of new carious lesions and periodontal problems. Patients should be recalled within short time intervals to be motivated for oral hygiene during their orthodontic therapy.

The K-Wire Fixation Technique for Endoscopic Brow Lift: A Long-Term Follow-Up

2019 ◽  
Vol 40 (10) ◽  
pp. 1051-1060 ◽  
Author(s):  
Paul E Chasan ◽  
Adam T Hauch
Keyword(s):  
Fixation Technique ◽  
Effective Technique ◽  
Level Of Evidence ◽  
Brow Lift ◽  
Wire Fixation ◽  
Aesthetic Results ◽  
Long Term Follow Up ◽  
Endoscopic Brow Lift

Abstract Background Many techniques have been presented for fixation during endoscopic brow lift, but no singular technique has become dominant. Objectives The authors described a technique for fixation for endoscopic brow lift that is inexpensive, easy to use, and versatile and has minimal morbidity. Methods The charts of 284 patients who underwent the K-wire fixation technique between December 1996 and September 2018 were reviewed. This technique employs a transcutaneous K-wire to hold the brow in position until tissue adhesion creates a lasting elevation of the brow. Results A total of 284 patients underwent K-wire fixation for endoscopic brow lifting. Two patients had hematomas and 5 patients (1.8%) required a second unilateral brow lift procedure. Long-term elevation of the brow was maintained in all patients. Conclusions K-wire fixation for endoscopic brow lift is a simple, safe, and effective technique for fixation during endoscopic brow lifting that provides long-term aesthetic results. Level of Evidence: 4

scholarly journals Combined Liposuction and Excision of Lipomas: Long-Term Evaluation of a Large Sample of Patients

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Libby R. Copeland-Halperin ◽  
Vincenza Pimpinella ◽  
Michelle Copeland
Keyword(s):  
Surgical Excision ◽  
Benign Tumors ◽  
Long Term Outcomes ◽  
Safe Alternative ◽  
Postoperative Hematoma ◽  
Aesthetic Results ◽  
Term Evaluation ◽  
Short And Long Term

Background. Lipomas are benign tumors of mature fat cells. They can be removed by liposuction, yet this technique is seldom employed because of concerns that removal may be incomplete and recurrence may be more frequent than after conventional excision. Objectives. We assessed the short- and long-term clinical outcomes and recurrence of combined liposuction and limited surgical excision of subcutaneous lipomas. Methods. From 2003 to 2012, 25 patients with 48 lipomas were treated with liposuction followed by direct excision through the same incision to remove residual lipomatous tissue. Initial postoperative follow-up ranged from 1 week to 3 months, and long-term outcomes, complications, and recurrence were surveyed 1 to 10 years postoperatively. Results. Lipomas on the head, neck, trunk, and extremities ranged from 1 to 15 cm in diameter. Early postoperative hematoma and seromas were managed by aspiration. Among 23 survey respondents (92%), patients were uniformly pleased with the cosmetic results; none reported recurrent lipoma. Conclusions. The combination of liposuction and excision is a safe alternative for lipoma removal; malignancy and recurrence are uncommon. Liposuction performed through a small incision provides satisfactory aesthetic results in most cases. Once reduced in size, residual lipomatous and capsular tissue can be removed without expanding the incision. These favorable outcomes support wider application of this technique in appropriate cases.

Immediate Gore-Tex Sling Suspension for Management of Facial Paralysis in Head and Neck Extirpative Surgery

2007 ◽  
Vol 137 (2) ◽  
pp. 228-232 ◽  
Author(s):  
Mia E. Skourtis ◽  
Stephen M. Weber ◽  
J. David Kriet ◽  
Douglas A. Girod ◽  
Terance T. Tsue ◽  
...  
Keyword(s):  
Head And Neck ◽  
Late Complications ◽  
Facial Reconstruction ◽  
High Rate ◽  
Wound Complications ◽  
Early Results ◽  
Aesthetic Results ◽  
Long Term Follow Up

OBJECTIVE: We sought to evaluate the functional and aesthetic outcomes of immediate facial reconstruction with a Gore-Tex (expanded polytetrofluoroethylene) sling in irradiated patients undergoing large head and neck tumor extirpation with facial nerve resection. STUDY DESIGN AND SETTING: We conducted a retrospective study of 17 patients at two academic institutions who underwent extirpative surgery with immediate Gore-Tex sling reconstruction and completed radiotherapy. Functional and aesthetic results were evaluated at three intervals. RESULTS: All patients had excellent immediate results and good or excellent intermediate-term results. At long-term follow-up, results were good to excellent in 47% and unacceptable in 35% of patients. CONCLUSION: In irradiated patients undergoing total parotidectomy with immediate facial reconstruction using Gore-Tex slings, early results are excellent, but there is a high incidence of major wound complications and unacceptable results in long-term follow-up. SIGNIFICANCE: There is a high rate of late complications associated with immediate facial reconstruction with Gore-Tex slings in irradiated patients.

Repeatedly Relapsing Disseminated Histoplasmosis: Clinical Observations During Long-Term Follow-Up

1987 ◽  
Vol 156 (2) ◽  
pp. 308-312 ◽  
Author(s):  
C. V. Paya ◽  
P. E. Hermans ◽  
R. E. Van Scoy ◽  
R. E. Ritts ◽  
H. A. Homburger
Keyword(s):  
Clinical Observations ◽  
Disseminated Histoplasmosis ◽  
Long Term Follow Up

scholarly journals Interproximal space recovery using an orthodontic elastic separator before prosthetic restoration: a case report

2011 ◽  
Vol 22 (1) ◽  
pp. 79-82 ◽  
Author(s):  
Luciana Lira Meneghel ◽  
Linda Wang ◽  
Murilo Baena Lopes ◽  
Alcides Gonini Júnior
Keyword(s):  
Contact Point ◽  
Orthodontic Appliances ◽  
Gingival Inflammation ◽  
Second Molar ◽  
Restorative Treatment ◽  
Normal Occlusion ◽  
Fixed Orthodontic Appliances ◽  
Pocket Formation

The presence of a dental contact point is essential to maintain normal occlusion and to preserve the health of periodontal structures. Occasionally dental caries could compromise the interproximal contact point, leading to migration of the adjacent teeth with consequent retention of food, gingival inflammation, pocket formation, bone loss and dental mobility. In order to achieve an adequate restorative treatment, reestablishment of interproximal space is necessary. This report describes the interproximal space recovery between the maxillary first and second molars of a 45-year-old female patient before tooth reconstruction. In this case, an orthodontic elastic separator was indicated as an alternative to fixed orthodontic appliances in order to recover the necessary space. The technique was proven efficient, effective, economical, easy to perform and, above all, less invasive than other methods. The interproximal space was regained and a ceramic onlay was cemented for restoring the maxillary second molar. Periodical clinical and radiographic follow-up should be maintained to ensure long-term success.

scholarly journals Evaluating the Effectiveness of Accelerated and Accelerated Cornea Pulsing Crosslinking Based on the Presence of a Demarcation Line

2019 ◽  
Vol 16 (1S) ◽  
pp. 127-131
Author(s):  
L. I. Khalimova
Keyword(s):  
Visual Acuity ◽  
Central Zone ◽  
Demarcation Line ◽  
Clinical Observations ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
Stromal Edema

Purpose of the study is to assess the state of the demarcation line of the stroma after accelerated and pulsed accelerated ultraviolet cornea crosslinking. Patients and methods. Clinical observations included 24 patients (31 eyes) with keratoconus (KC), aged 18–46 years, men — 11 (45.9 %), women — 13 (54.1 %). Accelerated (a-CXL) crosslinking was carried out in continuous mode with a power of 18 mW/cm2 for 5 minutes (13 eyes), pulsed accelerated (i-ACXL) with a power of 18 mW/cm2 for 10 minutes, in mode 1 sec light / 1 sec pause (18 eyes). Conducted generally accepted and additional methods of ophthalmic research. The follow-up periods were 1, 3, and 6 months after surgery. Results. According to optical coherent tomography, the demarcation line was detected in all cases after a-CXL and i-ACXL. At 1 month after the crosslinking, there were no significant differences between the a-CXL and i-ACXL groups in terms of uncorrected visual acuity, corrected visual acuity, maximal correction. The average depth with demarcation at 1 month after the procedure in the central zone of the cornea was 216.41 ± 36.67 μm in the a-CXL group and 236.41 ± 37.08 μm in the i-ACXL group. Using confocal microscopy in vivo in both groups 1 month after surgery apoptosis of keratocytes and stromal edema were detected. A gradual restoration of the cornea to its original state was observed after 6 months. Conclusion. Research results have shown that accelerated and pulsed accelerated cross-linking are safe and effective technologies to stabilize the progression of keratoconus. Both crosslinking protocols provide a significant reduction in the duration of the procedure compared to the traditional one. Revealed deeper arrangement of the demarcation line when performing pulsed accelerated crosslinking compared to the accelerated. Further long-term and more extensive studies of accelerated and pulsed accelerated cornea ultraviolet crosslinking will provide improved information on their effectiveness in the long-term.

Sign in / Sign up

Export Citation Format

Share Document