Minimally invasive caries-removal procedures remove only caries-infected dentin and preserve caries-affected dentin that becomes remineralized. Dental cements containing calcium phosphate promote remineralization. This study evaluated the in vivo remineralization capacity of resin-based calcium-phosphate cement (Ca-P) used for indirect pulp-capping. Carious and sound teeth indicated for extraction were randomly restored with the Ca-P base or without base (control), followed by adhesive restoration. Study teeth were extracted after three months, followed by elemental analysis of the cavity floor. Mineral content of affected or sound dentin at the cavity floor was quantified by electron probe micro-analysis to 100-mum depth. After three months, caries-affected dentin underneath the Ca-P base showed significantly increased calcium and phosphorus content to a depth of 30 mum. Mineral content of treated caries-affected dentin was in the range of healthy dentin, revealing the capacity of Ca-P base to promote remineralization of caries-affected dentin.
[Purpose] This study aimed to evaluate the anti-inflammatory and analgesic effects of
intraoral application of low-level laser therapy (660 nm) to control pain, swelling and
interincisal opening following the extraction of mandibular third molars. [Subjects and
Methods] Ten patients underwent removal of lower third molars using the same surgical
protocol and pharmacological approach. In the postoperative period, all patients received
four consecutive daily sessions of low-level laser therapy, beginning 24 hours after the
surgery. Intraoral applications using the diode laser with 660 nm wavelength in the
continuous scan mode were performed covering the entire surgical area, which was divided
into four quadrants, each of 1 cm2 area at a distance of 1 cm. The energy
applied at each point was 5 J/cm2 during 8 seconds. [Results] The swelling and
interincisal opening returned to normal 24 hours after the first low-level laser therapy
application (Friedman test). Moreover, the pain intensity was reduced on the third
postoperative day, according to the Friedman test. [Conclusion] Low-level laser therapy
(660 nm), at the dosimetry used in this study, was effective in reducing postoperative
pain and swelling following oral surgery.
These results suggest that low-intensity immediate or early orthodontic loading does not affect mini-implant stability, because similar histomorphometric results were observed for all the groups, with partial osseointegration of the mini-implants present.
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