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Journal of Dentistry Nov 2022The aim of the present study was to evaluate, after 5 years, the efficacy of proximal microinvasive sealing of permanent teeth on the risk for caries lesion development.
OBJECTIVE
The aim of the present study was to evaluate, after 5 years, the efficacy of proximal microinvasive sealing of permanent teeth on the risk for caries lesion development.
METHODS
Children aged 8 to 10 y at baseline, at high caries risk, were studied. In the preventive (P) group the children had caries lesions on the distal surface of primary second molars (05d) but sound mesial surfaces of the approximating permanent first molars (6m). In the therapeutic (T) group the children had initial caries lesions on 6m that abutted lesions on 05d. Each child in the two groups had one 05d/6m pair. Using a split-mouth design, one 6m surface in each pair was randomly assigned to receive sealing while the other pair served as an unsealed control.
RESULTS
Of the 61 children at baseline 42 could be blindly examined clinically and radiographically both at baseline and after 5 years. In the P group, 8 of 28 (28.6%) sealed and 15 of 28 (53.6 %) unsealed sound 6m surfaces had developed caries lesions (p = 0.04). In the T group, the progression of the carious lesions on 6m was observed in 4 of 14 sealed (28.6%) and 8 of 14 (57.1%) unsealed caries control surfaces (p = 0.29). Pooling the data from the two groups, the difference between sealed and non-sealed surfaces was significant (p = 0.013).
CONCLUSION
Both preventive and therapeutic sealant to 6m adjacent to a lesion on 05d has effectiveness in caries reduction in high caries risk children CLINICAL SIGNIFICANCE: The beneficial effect of sealing is observed for at least 5 years after a single sealant treatment.
PubMed: 36574596
DOI: 10.1016/j.jdent.2022.104382 -
Experimental Brain Research 1990Neuronal tracers (diamidino yellow or wheat germ agglutinin conjugated with horseradish peroxidase) were injected in the arm representations of area 6a alpha (mesial...
Neuronal tracers (diamidino yellow or wheat germ agglutinin conjugated with horseradish peroxidase) were injected in the arm representations of area 6a alpha (mesial surface, area F3), in the arm representation of area 6a beta (mesial surface) as well as in the eye field of area 6a beta (dorso-medial surface). The results showed that the arm representation of area F3 receives topographically organized afferents from motor and premotor areas (areas F1, F2, F4 and F5). A further connection was found with that part of cingulate cortex that sends projections to the spinal cord. In contrast, the arm representation of area 6a beta receives afferents chiefly from area F5, the prefrontal cortex and that part of cingulate sulcus which has few, if any, connections with the spinal cord. No connections were found with the precentral motor cortex (area F1). The area 6a beta eye field receives afferents mostly from the frontal eye field. Further connections are with the prefrontal cortex and cingulate gyrus. It is suggested that the so called "low level" motor functions of supplementary motor area are due to the activity of area F3, whereas the so called "high level" motor functions depend upon an independent area located in area 6a beta.
Topics: Animals; Arm; Electrophysiology; Fluorescent Dyes; Gyrus Cinguli; Horseradish Peroxidase; Macaca fascicularis; Motor Cortex; Neurons, Afferent; Wheat Germ Agglutinins
PubMed: 2257908
DOI: 10.1007/BF00230855 -
European Archives of Paediatric... Apr 2014This study aimed at evaluating the efficacy of sealants at preventing caries development or arresting the progression of non-cavitated mesial carious lesions in first... (Comparative Study)
Comparative Study
Efficacy of sealing the mesial surfaces of first permanent molars with respect to the status of the distal surfaces of the second primary molars in children at high caries-risk.
AIM
This study aimed at evaluating the efficacy of sealants at preventing caries development or arresting the progression of non-cavitated mesial carious lesions in first permanent molars (6m) with respect to the status of the distal surfaces of the second primary molars (05d).
METHOD
The study population comprised 121, 8- to 10-year-old schoolchildren in a high-caries community in Valparaiso, Chile. They were examined clinically and radiographically and screened for caries-related risk factors using the risk-assessment software program Cariogram. The children were divided into three groups: Group A, with no caries lesions on adjacent surfaces of 05d-6m, served as a control group. Group B, with caries on 05d, received a preventive sealant on the caries-free 6m after temporary separation, and Group C, with carious 05d, received a therapeutic sealant on a 6m with initial lesions. Standardised follow-up radiographs were taken in 110 children after 12-14 months.
RESULTS
In group A, with no treatment, the mean percentage of sound surfaces that developed caries lesions was 3.8%. In group B, the mean percentage of sound 6m surfaces that developed caries lesions was 4.9% for sealed and 22.0% for unsealed surfaces (p < 0.05). In group C, the progression of therapeutically sealed carious lesions on 6m was 3.0% compared with 41.2% for unsealed carious control surfaces (p < 0.05).
CONCLUSIONS
These results suggest that sealing sound surfaces and non-cavitated caries in the proximal mesial surfaces of permanent molar teeth effectively prevents or reduces the progression of caries adjacent to lesions on the distal surfaces of the second primary molars.
Topics: Bisphenol A-Glycidyl Methacrylate; Child; DMF Index; Dental Caries; Dental Caries Susceptibility; Dental Plaque Index; Disease Progression; Follow-Up Studies; Humans; Light-Curing of Dental Adhesives; Molar; Pit and Fissure Sealants; Radiography, Bitewing; Risk Assessment; Tooth Remineralization; Tooth, Deciduous; Treatment Outcome
PubMed: 23835900
DOI: 10.1007/s40368-013-0066-z -
Photodiagnosis and Photodynamic Therapy Sep 2020This in vitro study evaluated the caries status of the smooth surfaces of primary molars using the DIAGNOdent pen, Vistacam iX, and Bitewing radiography as compared to...
OBJECTIVE
This in vitro study evaluated the caries status of the smooth surfaces of primary molars using the DIAGNOdent pen, Vistacam iX, and Bitewing radiography as compared to histologic assessment.
METHODS
68 primary molars were selected, and their mesial or distal caries status were determined using DIAGNOdent pen, Bitewing radiography, and Vistacam iX. To achieve reference standards, the teeth were sectioned and directly assessed by a stereomicroscope. The Mc Nemar test was used to compare the sensitivity, specificity, and accuracy of the methods. The spearman rank correlation coefficient (r) was also determined to compare the extent of caries with histology. The statistical significance level was set at α = 0.05.
RESULTS
Regarding D1 as a cut-off point for histological assessments, sensitivity, specificity, and accuracy of DIAGNOdent pen were 82 %, 75 %, and 80 % while the values were 63 %, 100 % and 62 % for bitewing radiography and 56 %, 100 % and 59 % for Vistacam iX. Regarding D3 as a cut-off point for histological analysis; Sensitivity, specificity, and accuracy rates of DIAGNOdent pen were 71 %, 86 % and 80 % while these values were 71 %, 73 % and 72 % for bitewing radiography and 50 %, 78 % and 67 % for Vistacam iX.
CONCLUSION
In conclusion, the DIAGNOdent pen shows the highest performance and accuracy to detect smooth surface caries both at D1 and D3 among the three methods. Although VistaCam iX and bitewing radiography showed better performance at D3 compared to D1, their performances were lower than the DIAGNOdent pen.
Topics: Dental Caries; Dental Caries Susceptibility; Fluorescence; Humans; Molar; Photochemotherapy; Photosensitizing Agents; Reproducibility of Results; Sensitivity and Specificity
PubMed: 32526375
DOI: 10.1016/j.pdpdt.2020.101867 -
Journal of Endodontics Jul 1999The purpose of this study was to evaluate the scatter of light through human teeth with laser Doppler flowmetry. An optical probe (probe 1), which mounted two optical...
The purpose of this study was to evaluate the scatter of light through human teeth with laser Doppler flowmetry. An optical probe (probe 1), which mounted two optical fibers (one for light illumination and another for the measurement of backscattered light intensity) was placed on the labial surface of the extracted teeth. Another optical probe (probe 2) for the measurement of transmitted-light intensity was placed either on the mesial, distal, or palatal surface or in the canal of the teeth. The light intensity at probe 1 was stable, irrespective of the location of probe 2, whereas the transmitted light intensity at probe 2 tended to increase as probe 2 moved to more incisal positions on the mesial, distal, and palatal tooth surfaces. The results indicate that the light scatters to a wide area outside the tooth and provides information regarding the surrounding tissue blood flow.
Topics: Chemical Phenomena; Chemistry, Physical; Dental Pulp; Dental Pulp Test; Humans; Incisor; Laser-Doppler Flowmetry; Periodontium; Scattering, Radiation; Tooth
PubMed: 10687512
DOI: 10.1016/S0099-2399(99)80286-6 -
Oral Surgery, Oral Medicine, Oral... Sep 2010This in vitro study evaluated rises in temperature on the outer root surface of human incisors during ultrasonic post removal with different water flows. (Comparative Study)
Comparative Study
OBJECTIVE
This in vitro study evaluated rises in temperature on the outer root surface of human incisors during ultrasonic post removal with different water flows.
STUDY DESIGN
Thirty-six extracted teeth (12 maxillary central incisors, 12 maxillary lateral incisors, and 12 mandibular incisors) were used. After root canal preparation, the teeth were obturated, and prefabricated posts were cemented into the prepared spaces. Posts were ultrasonically instrumented dry and with irrigation at 20 mL/min and 40 mL/min. Temperature changes on the entire mesial outer surfaces of the roots were measured at 10-second intervals using an infrared thermal imaging camera.
RESULTS
Increases in root surface temperature were significantly lower when posts were instrumented with 40 mL/min water irrigation compared with dry vibration and 20 mL/min irrigation, which also significantly differed from each other. Statistical analysis among tooth groups showed differences in the mean temperature rise of maxillary central incisors and maxillary lateral incisors compared with mandibular incisors when posts were instrumented dry or with 20 mL/min irrigation. There were no significant differences in mean temperature rises between the studied groups when 40 mL/min irrigation was used.
CONCLUSIONS
Water cooling during ultrasonic post instrumentation significantly reduced temperature increases on the outer root surface; however, the intensity of the cooling was also important. Our results suggest that copious water irrigation during post removal is an effective method to protect the root's surrounding tissue.
Topics: Body Temperature; Dental Debonding; Dental Instruments; Device Removal; Hot Temperature; Humans; Incisor; Mandible; Maxilla; Post and Core Technique; Root Canal Irrigants; Root Canal Preparation; Statistics, Nonparametric; Tooth Root; Ultrasonic Therapy
PubMed: 20674413
DOI: 10.1016/j.tripleo.2010.04.022 -
Journal of Dentistry Apr 2011This cross-sectional study by the Northwest PRECEDENT practitioners correlated the location of caries diagnosed in the past 12 months with treatment provided.
OBJECTIVES
This cross-sectional study by the Northwest PRECEDENT practitioners correlated the location of caries diagnosed in the past 12 months with treatment provided.
METHODS
An oral health survey was conducted on up to 20 patients per practice for 101 practises in the Northwest PRECEDENT network. A total of 1943 eligible patients were randomly assessed for the location of and treatment provided for caries lesions diagnosed within the past 12 months. Regression analysis using generalized estimating equations (GEE) was performed to assess association of treatment to tooth location and surface characterization, adjusting for age, practice location (urban/rural), dentist gender, and experience level. The analysis accounts for clustering by practice using robust variance estimates.
RESULTS
Overall, 55.4% of patients exhibited recent caries and 42.8% received treatment for at least one permanent tooth. 18% of treated teeth were treated with amalgam, and 72% were treated with composite. This percentage varied as a function of tooth surface characteristics, patient characteristics, and dentist characteristics. The results suggest that restoration selection does depend on tooth type and which surfaces are being restored. The odds of a molar receiving an amalgam restoration are 2.44 (95% CI=1.81-3.30) times higher as compared to a bicuspid, adjusting for all other covariates. When the restoration includes the occlusal surface of a tooth the odds are 0.42 (95% CI=0.20-0.89) times as great that amalgam will be placed. When the restoration includes the mesial or distal surface of the tooth the odds for amalgam restoration are 2.49 (95% CI=1.25-4.95) times higher compared to when it does not include these surfaces.
CONCLUSION
Restorative material choice varied based on caries location and practitioner gender.
Topics: Adolescent; Adult; Age Factors; Aged; Clinical Competence; Community-Based Participatory Research; Composite Resins; Cross-Sectional Studies; Dental Amalgam; Dental Caries; Dental Restoration, Permanent; Female; Humans; Linear Models; Male; Middle Aged; Practice Patterns, Dentists'; Professional Practice Location; Sex Factors; Tooth; Workload; Young Adult
PubMed: 21256915
DOI: 10.1016/j.jdent.2011.01.007 -
Pediatric Dentistry 2011The aim of this retrospective follow-up study was to verify the distance between the cementoenamel junction (CEJ) and the alveolar bone crest (ABC) in bitewing...
PURPOSE
The aim of this retrospective follow-up study was to verify the distance between the cementoenamel junction (CEJ) and the alveolar bone crest (ABC) in bitewing radiographs.
METHODS
Radiographs were digitized and divided into groups by: age, proximal crown surface status (sound→sound and unsound→unsound), tooth, and timing of radiograph. The CEJ-ABC distances were measured on the distal surface of the first primary molar and/or the mesial surface of the second lower primary molar, using the Image Tool software.
RESULTS
The results revealed interactions between the following variables: timing of radiograph-age, age-tooth, timing of radiograph - proximal crown surface status and age- proximal crown surface status. It has been detected that CEJ-ABC distances have significantly increased with time, particularly in terms of assessment of primary lower first molars. However, this increase is greater in unsound when compared to sound surfaces.
CONCLUSION
This study suggests that an increase in the CEJ-ABC distance is directly associated with aging in a normal periodontium in the primary dentition and that the presence of unsound surfaces can be a risk indicator for the development of alveolar bone loss.
Topics: Age Factors; Aging; Alveolar Bone Loss; Alveolar Process; Analysis of Variance; Child; Child, Preschool; Follow-Up Studies; Humans; Molar; Radiography, Bitewing; Retrospective Studies; Risk Factors; Statistics, Nonparametric; Tooth Cervix; Tooth Crown; Tooth, Deciduous
PubMed: 21902997
DOI: No ID Found -
Journal of Dental Research Jul 2017Our objective was to clarify the fate of the periodontal ligament (PDL) retained in the socket after tooth extraction, then determine if this tissue contributed to the...
Our objective was to clarify the fate of the periodontal ligament (PDL) retained in the socket after tooth extraction, then determine if this tissue contributed to the osseointegration of "immediate" implants placed in these fresh extraction sockets. Mice underwent maxillary first molar extraction, the residual PDL was removed by an osteotomy, and titanium implants were placed. The osteotomy was created in such a way that the palatal surface was devoid of PDL remnants while the buccal, mesial, and distal surfaces retained PDL fibers. At multiple time points after surgery, tissues were analyzed using a battery of molecular, cellular, and histomorphometrical assays. We found that PDL remnants mineralized and directly contributed to new bone formation in the extraction site. Compared with regions of an extraction site where the PDL was removed by osteotomy, regions that retained PDL fibers had produced significantly more new bone. Around immediate implants, the retained PDL remnants directly contributed to new bone formation and osseointegration. Thus, we conclude that PDL remnants are inherently osteogenic, and if the tissue is healthy, it is reasonable to conclude that curetting out an extraction socket prior to immediate implant placement should be avoided. This recommendation aligns with contemporary trends toward minimally invasive surgical manipulations of the extraction socket prior to immediate implant placement.
Topics: Animals; Bone Regeneration; Immediate Dental Implant Loading; In Situ Nick-End Labeling; Mice; Osseointegration; Osteotomy; Periodontal Ligament; Random Allocation; Titanium; Tooth Extraction; Tooth Socket; Wound Healing
PubMed: 28481696
DOI: 10.1177/0022034517707513 -
International Journal of Computerized... Nov 2022To evaluate the accuracy of tridimensional (3D)-printed guide-assisted flapless cortical bone micro-osteoperforations (MOPs) in the anterior mandible on a cadaver model.
AIM
To evaluate the accuracy of tridimensional (3D)-printed guide-assisted flapless cortical bone micro-osteoperforations (MOPs) in the anterior mandible on a cadaver model.
MATERIALS AND METHODS
Five human cadaver heads with complete dentition in the anterior mandible were used in the present study. Preplanning CBCT and intraoral surface scans were obtained. After alignment, drilling sites in the interradicular areas were planned from canine to canine, and a surgical guide was printed. The drilling was performed and a postprocedure CBCT scan was obtained to assess the accuracy of the procedure in relation to the virtual planning.
RESULTS
The mean ± standard deviation (SD) mesiodistal interradicular space was 2.67 ± 0.84 mm. The mean ± SD error of the actual drilled hole compared with the planned position of the mesial drill site was 0.66 ± 0.33 mm, and to the distal drill site it was 0.56 ± 0.33 mm. There was a statistically significant difference between the number of times the teeth were hit mesially (10 out of 64 holes) and distally (none).
CONCLUSIONS
The proposed technique, limited to an ex vivo scenario, provides a valid and reliable method for mandibular MOPs using a 3D-generated surgical guide. However, the risk of damaging adjacent radicular surfaces, particularly in areas with limited mesiodistal interradicular bone, needs to be considered. Further studies should focus on using thinner drills and adding other methods to stabilize the guide. Additionally, by selecting individuals and perforation sites with more mesiodistal interradicular bone, less damage is likely. (Int J Comput Dent 2022;25(4):387-0; doi: 10.3290/j.ijcd.b2599841).
Topics: Humans; Cone-Beam Computed Tomography; Surgery, Computer-Assisted; Mandible; Printing, Three-Dimensional; Cadaver
PubMed: 35072427
DOI: 10.3290/j.ijcd.b2599841