scholarly journals Retrieval of Prefabricated Zirconia Crowns with Er,Cr:YSGG Laser from Primary and Permanent Molars

2020 ◽  
Author(s):  
Janina Golob Deeb ◽  
Connor McCall ◽  
William Dahlke ◽  
Caroline Carrico ◽  
Kinga Grzech-Leśniak
Keyword(s):  
Primary Teeth ◽  
Pairwise Comparison ◽  
Permanent Teeth ◽  
Temperature Changes ◽  
Surface Areas ◽  
Crown Volume ◽  
Zirconia Crowns ◽  
Invasive Method ◽  
Permanent Molars ◽  
Post Hoc

(1) Background: Prefabricated zirconia crowns are used to restore teeth in children. The purpose of this study was to evaluate the removal of these crowns with the erbium, chromium: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser; (2) Methods: Twelve primary and 13 permanent teeth were prepared and prefabricated zirconia crowns were passively fitted and cemented with two resin modified glass-ionomer cements. Surface areas of prepared teeth and crowns were calculated. Crowns were removed using two laser settings: 4.5 Watts, 15 Hertz, 20 water/ 20 air, and 5 Watts, 15 Hertz, 50 water/50 air. The retrieval time and temperature changes were tested recorded. Data were analyzed using ANOVA with Tuckey’s adjusted post hoc pairwise comparison t-test; (3) Results: The average time for crown removal was: 3 minutes, 47.7 seconds for permanent; and 2 minutes 5 seconds for primary teeth. The mean temperature changes were 2.48℃ (SD=1.43) for permanent; and 3.14℃ (SD=1.88) for primary teeth. The time to debond was significantly positively correlated with tooth inner surface area and volume, outer crown volume, and the cement volume; (4) Conclusions: Use of the Er,Cr:YSGG laser is an effective, safe and non-invasive method to remove prefabricated zirconia crowns cemented with RMGI cements from permanent and primary teeth.

scholarly journals Retrieval of Prefabricated Zirconia Crowns with Er,Cr:YSGG Laser from Primary and Permanent Molars

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5569
Author(s):  
Janina Golob Deeb ◽  
Connor McCall ◽  
Caroline K. Carrico ◽  
William O. Dahlke ◽  
Kinga Grzech-Leśniak
Keyword(s):  
Primary Teeth ◽  
Pairwise Comparison ◽  
Permanent Teeth ◽  
Temperature Changes ◽  
Surface Areas ◽  
Crown Volume ◽  
Zirconia Crowns ◽  
Invasive Method ◽  
Permanent Molars ◽  
Post Hoc

(1) Background: Prefabricated zirconia crowns are used to restore teeth in children. The purpose of this study was to evaluate the removal of these crowns with the erbium, chromium: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser; (2) Methods: A total of 12 primary and 12 permanent teeth were prepared and prefabricated zirconia crowns were passively fitted and cemented with two resin modified glass-ionomer (RMGI) cements. Surface areas of prepared teeth and crowns were calculated. Crowns were removed using two laser settings: 4.5 Watts, 15 Hertz, 20 water/20 air, and 5 Watts, 15 Hertz, 50 water/50 air. The retrieval time and temperature changes were tested recorded. Data were analyzed using ANOVA with Tukey’s adjusted post hoc pairwise comparison t-test; (3) Results: The average time for crown removal was: 3 min, 47.7 s for permanent; and 2 min 5 s for primary teeth. The mean temperature changes were 2.48 °C (SD = 1.43) for permanent; and 3.14 °C (SD = 1.88) for primary teeth. The time to debond was significantly positively correlated with tooth inner surface area and volume, outer crown volume, and the cement volume; (4) Conclusions: Use of the Er,Cr:YSGG laser is an effective, safe and non-invasive method to remove prefabricated zirconia crowns cemented with RMGI cements from permanent and primary teeth.

Analysis of Primary and Permanent Molars Prepared with High Speed and Ultrasonic Abrasion Systems

2007 ◽  
Vol 32 (1) ◽  
pp. 49-52 ◽  
Author(s):  
Rafael De Lima Pedro ◽  
Livia Azeredo Alves Antunes ◽  
Áurea Simone Barrôso Vieira ◽  
Lucianne Comple Maia
Keyword(s):  
High Speed ◽  
Primary Teeth ◽  
Smear Layer ◽  
The Other ◽  
Permanent Teeth ◽  
Layer Formation ◽  
Dentinal Tubules ◽  
Irregular Surfaces ◽  
Rotary Instruments ◽  
Permanent Molars

The aim of this study was to compare high speed and ultrasonic systems with regard to both topography and smear layer formation in the cavity preparations of sound primary and permanent molars. Class I occlusal cavities measuring 2.00 x 2.00 x 2.00 mm were performed in 14 molars, equally divided into two groups (GI= 7 primary teeth and GII = 7 permanent teeth). High speed rotary instruments produced regular layers of enamel and dentin, despite the marked presence of grooves and microfractures on enamel surfaces. On the other hand, ultrasonic abrasion yielded more irregular surfaces in enamel and dentin, with a granular and wavy aspect, but without microfractures in enamel. Both types of dental substrates were found to have an intense smear layer formation, partially or even completely obliterating the dentinal tubules (p>0.05), irrespective of the instrument used. No difference was observed in either primary or permanent teeth as regards the amount of smear layer produced by high speed or ultrasonic abrasion instruments (p>0.05). It was concluded that with regard to the topography of cavity preparations, there were differences between the instruments used, irrespective of the dental substrate. Both systems allowed dense smear layer formation, which completely or partially obliterated the dentinal tubules of primary and permanent teeth.

Tubule Density and Diameter in Coronal Dentin from Primary and Permanent Human Teeth

2013 ◽  
Vol 19 (6) ◽  
pp. 1445-1449 ◽  
Author(s):  
Tathiane L. Lenzi ◽  
Camila de Almeida B. Guglielmi ◽  
Victor E. Arana-Chavez ◽  
Daniela P. Raggio
Keyword(s):  
Repeated Measures ◽  
Primary Teeth ◽  
Permanent Teeth ◽  
Scanning Electron Microscopy Data ◽  
Dentinal Tubule ◽  
Human Teeth ◽  
Deep Layers ◽  
Microscopy Data ◽  
Post Hoc ◽  
Tubule Diameter

AbstractThis study compared dentinal tubule density and diameter of human primary and permanent teeth at different depths of the coronal dentin. Crowns of eight primary second molars and eight permanent third molars were serially sectioned into three disks of ~0.5 mm thickness (superficial, middle, and deep layers), perpendicular to the long axis. Tubule density and diameter were evaluated in 2,000× and 3,000× magnifications by scanning electron microscopy. Data obtained were subjected to two-way repeated measures ANOVA and Tukey's post hoc test (α = 0.05). Tubule density was greater in primary teeth compared with permanent ones, regardless of depth (primary: 124,329 ± 43,594 mm2; permanent: 45,972 ± 21,098 mm2). In general, the tubule density increased as the dentin depth increased, except to the superficial and middle layers from permanent teeth. Tubule diameter was larger in the dentin layer close to the pulp chamber (superficial: 2.4 ± 0.07 μm; middle: 3.70 ± 0.06 μm; deep: 4.28 ± 0.04 μm). No difference was observed between primary (3.48 ± 0.81 μm) and permanent teeth (3.47 ± 0.73 μm). The tubule diameter increases as the dentin depth increases for primary and permanent teeth; however, the tubule density is higher in primary teeth.

Resorption of multirooted temporary teeth in children with dentofacial anomalies in accordance with the orthopantomography data

2020 ◽  
Vol 20 (3) ◽  
pp. 235-241
Author(s):  
F. S. Ayupova ◽  
S. N. Alekseenko ◽  
V. Ya. Zobenko ◽  
T. V. Gayvoronskaya
Keyword(s):  
Primary Teeth ◽  
Root Resorption ◽  
Type A ◽  
Mixed Dentition ◽  
Permanent Teeth ◽  
Primary Molars ◽  
Second Primary ◽  
X Rays ◽  
Primary Molar ◽  
Posterior Teeth

Relevance. To study the incidence of different types of resorption of multirooted primary teeth, to specify indications for deciduous molar extraction to prevent eruption abnormalities of permanent posterior teeth in mixed dentition.Materials and methods. Root resorption of 375 multirooted primary teeth (166 first primary molars and 209 second primary molars) was studied on panoramic X-rays of 60 children (30 girls and 30 boys) aged between 7 and 15. Illustrated classification by T.F. Vinogradova (1967) improved by authors was used to determine type and degree of root resorption of multi-rooted primary teeth. Received data were described with absolute values of number of cases and percentage. Chi-square was used to detect differences in sign incidence rate between groups, p<0.05 was considered statistically significant.Results. There were no statistically significant gender differences (p>0,05) in type and degree of root resorption of multirooted primary teeth. Type A resorption prevailed and constituted 53.3% of all primary molars. Disturbances in root resorption of multirooted primary teeth in mixed dentition were related to health condition of primary teeth. Transition of even resorption to unven was considered a risk factor of delayed eruption and aberrant position of permanent teeth, and indication for extraction of a primary molar in question. Conclusions. 1) Even root resorption (type A) was detected in 53.3% of primary molars in mixed dentition by orthopantomography. 2) Transition from even resorption of primary molar roots to uneven resorption was associated with eruption deviations and delayed premolar eruption. 3) Timely extraction of primary molars with uneven root resorption facilitated correct eruption of premolars and increased effectiveness of secondary prevention of malocclusion in children.

scholarly journals Radiological Evaluation of Stainless Steel Crowns Placed on Permanent Teeth in Patients Treated under General Anaesthesia

2021 ◽  
Vol 18 (5) ◽  
pp. 2509
Author(s):  
Marie-Laure Munoz-Sanchez ◽  
Natacha Linas ◽  
Nicolas Decerle ◽  
Valérie Collado ◽  
Denise Faulks ◽  
...  
Keyword(s):  
Stainless Steel ◽  
General Anaesthesia ◽  
Alveolar Bone ◽  
Dental Treatment ◽  
Glass Ionomer Cement ◽  
Permanent Teeth ◽  
Marginal Adaptation ◽  
Permanent Molars ◽  
A Minor ◽  
Ionomer Cement

Evidence-based evaluations of dental treatment are needed to support the development of special care dentistry services. This retrospective study was designed to collect and analyse X-ray images of permanent teeth restored with stainless steel crowns (SSC) in patients treated under general anaesthesia. Between 2013 and 2019, 360 permanent molars were crowned with SSCs in 198 adult patients. One calibrated investigator used an original validated tool to evaluate four radiographic criteria for molars restored with SSCs: i) marginal adaptation; ii) interdental proximal contact; iii) the presence of glass ionomer cement overflow; and iv) the loss of alveolar bone. Overall, no defect or a minor defect was reported for the majority of SSCs for the criteria “Marginal adaptation” (62.5%, n = 320), “Proximal contact” (82.2%, n = 236) and “Cement overflow” (95.8%, n = 337). Alveolar bone resorption was reported in 8.3% of cases, n = 14, after a mean period of 8.9 ± 14.3 months. It was shown that the restoration of permanent teeth using SSCs placed under general anaesthesia presents a low risk of periodontal morbidity in the medium term when assessed radiographically.

scholarly journals Evaluation of Different Near-Infrared Spectroscopy Devices for Assessing Tissue Oxygenation with a Vascular Occlusion Test in Healthy Volunteers

2020 ◽  
Vol 57 (6) ◽  
pp. 341-347
Author(s):  
Jaeyeon Chung ◽  
Sang-Hwan Ji ◽  
Young-Eun Jang ◽  
Eun-Hee Kim ◽  
Ji-Hyun Lee ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Pairwise Comparison ◽  
Vascular Occlusion ◽  
Tissue Oxygen Saturation ◽  
Vascular Occlusion Test ◽  
Occlusion Test ◽  
Significant Difference ◽  
Post Hoc

Near-infrared spectroscopy devices can measure peripheral tissue oxygen saturation (StO<sub>2</sub>). This study aims to compare StO<sub>2</sub> using INVOS® and different O3™ settings (O3<sup>25:75</sup> and O3<sup>30:70</sup>). Twenty adults were recruited. INVOS® and O3™ probes were placed simultaneously on 1 side of forearm. After baseline measurement, the vascular occlusion test was initiated. The baseline value, rate of deoxygenation and reoxygenation, minimum and peak StO<sub>2</sub>, and time from cuff release to peak value were measured. The parameters were compared using ANOVA and Kruskal-Wallis tests. Bonferroni’s correction and Mann-Whitney pairwise comparison were used for post hoc analysis. The agreement between StO<sub>2</sub> of devices was evaluated using Bland-Altman plots. INVOS® baseline value was higher (79.7 ± 6.4%) than that of O3<sup>25:75</sup> and O3<sup>30:70</sup> (62.4 ± 6.0% and 63.7 ± 5.5%, respectively, <i>p</i> &#x3c; 0.001). The deoxygenation rate was higher with INVOS® (10.6 ± 2.1%/min) than with O3<sup>25:75</sup> and O3<sup>30:70</sup> (8.4 ± 2.2%/min, <i>p</i> = 0.006 and 7.5 ± 2.1%/min, <i>p</i> &#x3c; 0.001). The minimum and peak StO<sub>2</sub> were higher with INVOS®. No significant difference in the reoxygenation rate was found between the devices and settings. The time to reach peak after cuff deflation was faster with INVOS® (both <i>p</i> &#x3c; 0.001). Other parameters were similar. There were no differences between the different O3™ settings. There were differences in StO<sub>2</sub> measurements between the devices, and these devices should not be interchanged. Differences were not observed between O3™ device settings.

scholarly journals Treatment of a Patient with Multiple Impacted Teeth

2007 ◽  
Vol 77 (4) ◽  
pp. 735-741 ◽  
Author(s):  
Richard Scott Conley ◽  
Scott B. Boyd ◽  
Harry L. Legan ◽  
Christopher C. Jernigan ◽  
Craig Starling ◽  
...  
Keyword(s):  
Case Report ◽  
Treatment Planning ◽  
Orthodontic Treatment ◽  
Primary Teeth ◽  
Permanent Tooth ◽  
Permanent Teeth ◽  
Treatment Sequence ◽  
Impacted Teeth ◽  
Case Complexity ◽  
Multiple Primary

Abstract An impacted or missing permanent tooth can add significant complications to an otherwise straightforward case. When multiple impacted teeth are present, the case complexity increases further. Developing a treatment sequence, determining appropriate anchorage, and planning and executing sound biomechanics can be a challenge. The following case report illustrates a patient reportedly diagnosed with mild scleroderma as an adolescent. He presented for orthodontic treatment as an adult with multiple retained primary teeth and multiple impacted teeth. Diagnosis, treatment planning, and various methods of managing guided eruption of impacted teeth will be discussed. Following orthodontic treatment that required extraction of multiple primary and permanent teeth as well as exposure and ligation of multiple permanent teeth by an oral surgeon, the patient finished with a significantly improved functional and esthetic result.

Aggressive periodontitis of the primary dentition associated with idiopathic immune deficiency: case report and treatment considerations

2005 ◽  
Vol 29 (1) ◽  
pp. 27-31 ◽  
Author(s):  
Enrique Bimstein ◽  
Michael McIlwain ◽  
Joseph Katz ◽  
Greg Jerrell ◽  
Robert Primosch
Keyword(s):  
Immune Deficiency ◽  
Case Report ◽  
Primary Teeth ◽  
Aggressive Periodontitis ◽  
Primary Dentition ◽  
Permanent Teeth ◽  
Gingival Inflammation ◽  
Adequate Treatment ◽  
Treatment Considerations ◽  
Topical Applications

The present case, of a child with an idiopathic immune deficiency and aggressive periodontitis in the primary dentition, serves as an example for the treatment considerations in these cases. Extraction of all the primary teeth proved to be the most adequate treatment. It allowed the child to eat properly and prevented unwanted infections that could endanger the life of the child. The newly erupted permanent teeth have been subjected to careful oral hygiene, clorhexidine topical applications, and have mild gingival inflammation and no attachment loss.

An in Vivo Comparison of Antimicrobial Efficacy of Sodium Hypochlorite and Biopure MTAD™ against Enterococcus Faecalis in Primary Teeth: A qPCR Study

2014 ◽  
Vol 39 (1) ◽  
pp. 30-34 ◽  
Author(s):  
SG Tulsani ◽  
N Chikkanarasaiah ◽  
S Bethur
Keyword(s):  
Root Canal ◽  
Primary Teeth ◽  
Antimicrobial Efficacy ◽  
Permanent Teeth ◽  
Control Group ◽  
Statistical Significant Difference ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Root Canal Irrigant

Objectives: Biopure MTAD™, a new root canal irrigant has shown promising results against the most common resistant microorganism, E. faecalis, in permanent teeth. However, there is lack of studies comparing its antimicrobial effectiveness with NaOCl in primary teeth. The purpose of this study was to compare the in vivo antimicrobial efficacy of NaOCl 2.5% and Biopure MTAD™ against E. faecalis in primary teeth. Study design: Forty non vital single rooted primary maxillary anterior teeth of children aged 4-8 years, were irrigated either with NaOCl 2.5% (n=15), Biopure MTAD™ (n=15) and 0.9% Saline (n=10, control group). Paper point samples were collected at baseline (S1) and after chemomechanical preparation (S2) during the pulpectomy procedure. The presence of E. faecalis in S1 & S2 was evaluated using Real time Polymerase Chain Reaction. Results: Statistical significant difference was found in the antimicrobial efficacy of NaOCl 2.5 % and BioPure MTAD™ when compared to saline (p&gt;0.05). However, no statistical significant difference was found between the efficacies of both the irrigants. Conclusions: NaOCl 2.5% and BioPure MTAD™, both irrigants are equally efficient against E. faecalis in necrotic primary anterior teeth. MTAD is a promising irrigant, however clinical studies are required to establish it as ideal root canal irrigant in clinical practice.

Sign in / Sign up

Export Citation Format

Share Document