A Preliminary Study of Posteruptive Maturation of Teeth in situ

Brudevold, F.; Aasenden, R.; Bakhos, Y.

doi:10.1159/000260604

Cited by 33 publications

(26 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(Ca and P) in the outer layer of old enamel were higher than in young enamel (po0.05) due to the prolonged exposure to the calcium, phosphate, and fluoride contents of the oral cavity (Brudevold et al, 1982). Thus, with increasing age, there is a reduction in the organic matrix surrounding the prisms in the outer enamel layer (Park et al, 2008b), which leads to the decreased value of K IC,II found in old enamel.…”

Section: Discussionmentioning

confidence: 95%

Spatial distribution of the human enamel fracture toughness with aging

Zheng

Song

et al. 2013

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

Enamel AgingMineral content a b s t r a c t A better understanding of the fracture toughness (KIC) of human enamel and the changes induced by aging is important for the clinical treatment of teeth cracks and fractures. We conducted microindentation tests and chemical content measurements on molar teeth from "young" (18≤age≤25) and "old" (55≤age) patients. The KIC and the mineral contents (calcium and phosphorus) in the outer, the middle, and the inner enamel layers within the cuspal and the intercuspal regions of the crown were measured through the Vickers toughness test and Energy Dispersive X-Ray Spectroscopy (EDS), respectively. The elastic modulus used for the KIC calculation was measured through atomic force microscope (AFM)-based nanoindentation tests. In the outer enamel layer, two direction-specific values of the KIC were calculated separately (direction I, crack running parallel to the occlusal surface; direction II, perpendicular to direction I). The mean KIC of the outer enamel layer was lower than that of the internal layers (po0.05). No other region-related differences in the mechanical properties were found in both groups. In the outer enamel layer, old enamel has a lower KIC, II and higher mineral contents than young enamel (po0.05). The enamel surface becomes more prone to cracks with aging partly due to the reduction in the interprismatic organic matrix observed with the maturation of enamel.

show abstract

Section: Discussionmentioning

confidence: 95%

Spatial distribution of the human enamel fracture toughness with aging

Zheng

Song

et al. 2013

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

show abstract

“…To our knowledge, this is the first laboratory report on the superficial enamel hardness of uncut human enamel samples. Increased surface hardness values in the uncut samples could be due to the increased mineral content, and density caused by post eruptive maturation in the enamel surface compared with the subsurface enamel 24,[27][28][29] . These hardness results suggested the importance of the superficial enamel layer of natural (uncut) enamel and is an important layer to resist acidic challenge, either that from erosive changes or caries.…”

Section: Discussionmentioning

confidence: 99%

A comparative study of the susceptibility of cut and uncut enamel to erosive demineralization

Lin

Kitasako

Nakashima

et al. 2017

Dental Materials Journal

View full text Add to dashboard Cite

This study aimed to evaluate the susceptibility of cut and uncut enamel surfaces to an erosive challenge and to examine the resultant characteristics/morphological changes. Ten extracted human incisors were used for preparation of enamel samples, and samples were immersed in citric acid. After 3 (total 3 min) and 6 cycles (total 6 min) of erosive challenges, surface loss (SL) and morphological changes were measured using scanning microscopy and FIB-TEM. Ca release (CA) and surface hardness (SH) were measured using a calcium-sensitive electrode and hardness tester respectively. Mean values of all measurements were statistically analyzed by using a t-test. Uncut enamel samples had significantly lower SL and greater SH than cut enamel (p<0.01). Cut enamel samples after 3 cycles showed higher CA compared with those from uncut enamel samples (p<0.05). Cut enamel was shown to be more susceptible to acidic dissolution and deeper acid penetration than uncut enamel after erosive demineralization.

show abstract

“…5 Compositional analyses of successive layers of enamel suggest that mineralization can take place to a depth of 0.5 mm for some time after eruption. 6 Since there are structural differences between mature and newly erupted teeth, it is logical to expect differences in bond strengths of orthodontic attachments bonded to mature teeth versus newly erupted or unerupted teeth. 2 The acid-etch bonding technique is commonly used in orthodontic clinics for attaching brackets.…”

Section: Introductionmentioning

confidence: 99%

“…According to White 9 SEPs are easily manipulated and used, resulting in comfort for the patients and decreasing the chair time by 65%. Because newly erupted or unerupted teeth have compositional and structural differences in their enamel minerals, 6,10 less etching time might be needed to create the surface irregularities required for bonding, or more time might be needed for etching mature teeth. 11 Tüfekçi et al 11 investigated the differences in shear bond strength (SBS) between newly erupted (taken from 13 -14 year old patients) and mature (taken from ＞23 year old patients) premolar teeth when using both conventional and self-etching techniques for bonding orthodontic appliances and concluded that bond strength does not appear to be affected by the posteruptive enamel maturation process.…”

Section: Introductionmentioning

confidence: 99%

Effects of conventional and self-etching adhesive systems on bond strength of orthodontic attachments bonded to erupted and unerupted teeth

et al. 2010

View full text Add to dashboard Cite

Objective: The aim of this study was to evaluate and compare the shear bond strength (SBS) and failure-mode of orthodontic buttons bonded to erupted and unerupted teeth with conventional and self-etching adhesive systems. Methods: Eighty-four erupted and 84 unerupted, human third-molar teeth were used. For both groups, the buccal surfaces of each tooth were assigned one of the following type of adhesive systems (n = 12). A, Conventional systems: 1, Transbond XT (3M Unitek, Monrovia, CA, USA); 2, Prime & Bond NT (Dentsply/Caulk, Milford, USA); 3, Single Bond (3M ESPE, Minnesota, USA); and B, Self-etching adhesives; 4, Clearfil SE Bond (Kuraray, Okayama, Japan); 5, Transbond Plus (3M Unitek, Monrovia, CA, USA); 6, Clearfil S3 (Kuraray, Tokyo, Japan); 7, G Bond (GC, Tokyo, Japan). The SBSs of the attachments and the adhesive remnant index (ARI) scores were recorded. Data were analyzed with analysis of variance (ANOVA), independent-sample t-test and chi-square tests. Results: When the SBSs of erupted and unerupted teeth were compared, only the Clearfil-SE Bond and G-Bond were significantly different. Bond strengths of all adhesive systems were higher in unerupted teeth than erupted teeth, except the Single-Bond system. Conclusions: When using conventional adhesives, bonding to erupted and unerupted teeth may not be significantly different. However, clinicians need to take into consideration the types of self-etching systems before usage. (Korean J Orthod 2010;40(4):267-275)

show abstract

A Preliminary Study of Posteruptive Maturation of Teeth in situ

Cited by 33 publications

References 19 publications

Spatial distribution of the human enamel fracture toughness with aging

Spatial distribution of the human enamel fracture toughness with aging

A comparative study of the susceptibility of cut and uncut enamel to erosive demineralization

Effects of conventional and self-etching adhesive systems on bond strength of orthodontic attachments bonded to erupted and unerupted teeth

Contact Info

Product

Resources

About