Differential Rate of Dentin Formation on Human Deciduous Anterior Tooth Surfaces Deduced from Tetracycline Labeling

1985 ◽  
Vol 124 (3-4) ◽  
pp. 145-148 ◽  
Author(s):  
Yuhko Ogura-Futaki ◽  
Tadahiro Ooë
Keyword(s):  
Anterior Tooth ◽  
Differential Rate ◽  
Tooth Surfaces ◽  
Tetracycline Labeling ◽  
Dentin Formation

In Vivo Tetracycline Labeling of Experimentally Induced Reparative Dentin in Human Teeth

1975 ◽  
Vol 54 (3) ◽  
pp. 444-448 ◽  
Author(s):  
M. Tagger ◽  
S. Perlmutter ◽  
H. Galon ◽  
M. Helft
Keyword(s):  
Ultraviolet Light ◽  
Tetracycline Hydrochloride ◽  
Human Teeth ◽  
Pulp Capping ◽  
Clinical Procedures ◽  
Reparative Dentin ◽  
Tetracycline Labeling ◽  
Dentin Formation ◽  
Deep Cavities

Tetracycline hydrochloride was administered to label reparative dentin in teeth indicated for extraction. Deep cavities or pulp capping performed on the teeth one to four months before extraction served as a stimulus for new dentin formation. Examination of undemineralized sections under ultraviolet light revealed fluorescent bands in the reparative dentin of most teeth. The technique can be safely used in studies of the effects of clinical procedures on the dentin and pulp of human teeth.

The Use of High - Sucrose Culture Media for the Identification of Oral Streptococci in Infant- Mother Pairs

2017 ◽  
Vol 68 (11) ◽  
pp. 2691-2693
Author(s):  
Krisztina Martha ◽  
Cristina Bica ◽  
Edva Anna Frunda
Keyword(s):  
Culture Media ◽  
Bacterial Flora ◽  
Mutans Streptococci ◽  
Resistant Bacteria ◽  
Oral Streptococci ◽  
Streptococcus Sobrinus ◽  
Sugar Intake ◽  
Tooth Surfaces ◽  
Refined Carbohydrates ◽  
High Sucrose

By the end of the 60�s, the theory that refined carbohydrates promotes the absorption of saccharolytic Gram-positive microbial species on the tooth surfaces has become generally. Mutans streptococci (Streptococcus mutans and Streptococcus sobrinus) were key players in this theory. On agar plates, Str. mutans produces small, circular colonies, in the presence of glucose, and in the presence of sucrose large, sticky, gelatinous colonies. This gelatinous texture is due to the shell material: mutant 1 � 3 glucose polymers and dextran 1 �! 6 glucose polymers. Str. mutans are able to survive in the oral cavity with a pH lower than 5.5. That is why consecutive multiple sugar intake promotes the colonization of Str. mutans, which results in dental caries in stagnant zones. As oral pH is continuously shifted to acid, more acid-resistant bacteria appear. Our aim was to identify species in infant-mother pair gingival crevicular bacterial flora, which can be detected on high-sucrose culture media and to underline the jeopardy of vertical oral contamination from mother to infant.

scholarly journals Immediate anterior tooth replacement by using an esthetic fixed bridge: A case report

2020 ◽  
Vol 3 ◽  
pp. 100109
Author(s):  
Muhammad Ikbal ◽  
Acing Habibie Mude ◽  
Irfan Dammar ◽  
Nisrina Ekayani
Keyword(s):  
Case Report ◽  
Anterior Tooth ◽  
Tooth Replacement

The Similarity Differential Rate Hypothesis

1996 ◽  
Vol 46 (3) ◽  
pp. 465-496 ◽  
Author(s):  
Roy C. Major ◽  
Eunyi Kim
Keyword(s):  
Differential Rate

scholarly journals Is the number of procedures completed a valid indicator of final year student competency in operative dentistry?

BDJ ◽  
2021 ◽  
Vol 230 (10) ◽  
pp. 663-670
Author(s):  
Luke J. Dawson ◽  
Kathryn Fox ◽  
Mark Jellicoe ◽  
Elliot Adderton ◽  
Vince Bissell ◽  
...  
Keyword(s):  
Valid Measure ◽  
Operative Dentistry ◽  
Student Activity ◽  
Frequent Type ◽  
Student Cohorts ◽  
Tooth Surfaces

AbstractIntroduction Concerns regarding the preparedness of dental graduates often focus on the number of procedures undertaken before qualification.Aims To assess the validity of numerical requirements in determining whether a student has sufficient competency to graduate.Materials and methods In total, 50,821 observations of student activity while on the restorative clinic, for two integrated student cohorts (n = 139), were continuously recorded using the LiftUpp system from their third year to graduation. Analysis of data determined the most frequent type, location and difficulty of the direct restorations provided.Results Four groups of students, categorised by the total number of restorations they provided, were identified. Those with the most restorations (70+) had a statistically significantly greater experience in restoring different tooth surfaces, in different quadrants, on different patients than those with the least (40-49). However, increased numbers did not correlate with increasing difficulty, suggesting that students simply became more adept at easier procedures.Discussion Using a derived measure of 'consistency', it was observed that increased performance consistency was not correlated with greater overall experience. Furthermore, only 4% of students were 100% consistent in their performance in their final year.Conclusions These data suggest that a 'numerical requirements' approach cannot be used, in isolation, as a valid measure of the competency of an individual. Further work is needed to validate consistency as a holistic measurement to characterise the performance of graduates.

Effect of a Calcium-silicate-based Restorative Cement on Pulp Repair

2012 ◽  
Vol 91 (12) ◽  
pp. 1166-1171 ◽  
Author(s):  
X.V. Tran ◽  
C. Gorin ◽  
C. Willig ◽  
B. Baroukh ◽  
B. Pellat ◽  
...  
Keyword(s):  
Calcium Silicate ◽  
Glass Ionomer Cement ◽  
Repair Process ◽  
Male Rats ◽  
Time Points ◽  
Tertiary Dentin ◽  
Pulp Exposure ◽  
Calcium Silicate Cements ◽  
Reparative Process ◽  
Dentin Formation

In cases of pulp injury, capping materials are used to enhance tertiary dentin formation; Ca(OH)2 and MTA are the current gold standards. The aim of this study was to evaluate the capacity of a new calcium-silicate-based restorative cement to induce pulp healing in a rat pulp injury model. For that purpose, cavities with mechanical pulp exposure were prepared on maxillary first molars of 27 six-week-old male rats, and damaged pulps were capped with either the new calcium-silicate-based restorative cement (Biodentine), MTA, or Ca(OH)2. Cavities were sealed with glass-ionomer cement, and the repair process was assessed at several time-points. At day 7, our results showed that both the evaluated cement and MTA induced cell proliferation and formation of mineralization foci, which were strongly positive for osteopontin. At longer time-points, we observed the formation of a homogeneous dentin bridge at the injury site, secreted by cells displaying an odontoblastic phenotype. In contrast, the reparative tissue induced by Ca(OH)2 showed porous organization, suggesting a reparative process different from those induced by calcium silicate cements. Analysis of these data suggests that the evaluated cement can be used for direct pulp-capping.

Effect of Sustained Interventions from Infancy to Toddlerhood in Children with Cleft Lip and Palate for Preventing Early Childhood Caries

2021 ◽  
pp. 1-9
Author(s):  
Sivasubramanian Abirami ◽  
Noopur Panchanadikar ◽  
Murugan Satta Muthu ◽  
Suganya Balasubramanian ◽  
Jyotsna Murthy ◽  
...  
Keyword(s):  
Early Childhood ◽  
Early Childhood Caries ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Intervention Group ◽  
Primary Caregivers ◽  
Assessment System ◽  
Incidence Density ◽  
Tooth Surfaces ◽  
Childhood Caries

The study aimed to evaluate the effectiveness of sustained interventions in children with cleft lip and palate (CLP) for preventing early childhood caries (ECC). This prospective, nonrandomized interventional cohort study was conducted in infants aged 0–12 months with congenital CLP. Interventions were given to parents/primary caregivers in the form of combined oral health-care measures (sterile wet gauze piece, finger brush, toothbrush, and toothpaste) by a motivational interviewing approach. Education of primary caregivers on oral hygiene was provided by audiovisual aids and demonstration. Reinforcement of the prescribed regimen was done through daily short message services in caregivers’ preferred language and bimonthly telephone calls. Participants were followed up for 9–32 months from the time of recruitment, with a mean period of 18.3 ± 5.1 months. Rates of dental caries were represented as prevalence rates, incidence density, and transitional probability. The distribution of the International Caries Detection and Assessment System (ICDAS) scores on different tooth surfaces affected in the intervention group was compared descriptively with that of the age- and sex-matched historical control groups. On analysis of surface-wise distribution of the ICDAS scores in the intervention group (<i>n</i> = 1,919), 1.2% (<i>n</i> = 24) had noncavitated lesions (ICDAS codes 1 and 2), 0.88% (<i>n</i> = 17) had cavitated lesions (ICDAS codes 3–6), and 0.26% (<i>n</i> = 5) had both cavitated and noncavitated lesions (ICDAS codes 1–6). The incidence density of caries-affected children observed at the first and last follow-ups was 1.2 persons/100 person-months and 1.3 persons/100 person-months of observation, respectively. The incidence density of new caries-affected tooth surfaces at the first and last follow-ups was 0.163 surfaces/100 surface-months and 0.062 surfaces/100 surface-months, respectively. Maxillary first molars had the maximum transition from sound to the cavitated lesion (11.5%), followed by maxillary incisors from sound to noncavitated (7.5%) at the last follow-up. Based on the newly developed assessment criteria in our study, sustained interventions proved to be significantly effective in preventing ECC in children with CLP.

THE GENETIC ARCHITECTURE OF ANTERIOR TOOTH MORPHOLOGY IN A LONGITUDINAL SAMPLE OF AUSTRALIAN TWINS AND FAMILIES

2021 ◽  
pp. 105168
Author(s):  
Kathleen S. Paul ◽  
Christopher M. Stojanowski ◽  
Toby Hughes ◽  
Alan Brook ◽  
Grant C. Townsend
Keyword(s):  
Genetic Architecture ◽  
Anterior Tooth ◽  
Tooth Morphology ◽  
Longitudinal Sample
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