This study evaluated color change, stability, and tooth sensitivity in patients submitted to different bleaching techniques.Material and methodsIn this study, 48 patients were divided into five groups. A half-mouth design was conducted to compare two in-office bleaching techniques (with and without light activation): G1: 35% hydrogen peroxide (HP) (Lase Peroxide - DMC Equipments, São Carlos, SP, Brazil) + hybrid light (HL) (LED/Diode Laser, Whitening Lase II DMC Equipments, São Carlos, SP, Brazil); G2: 35% HP; G3: 38% HP (X-traBoost - Ultradent, South Jordan UT, USA) + HL; G4: 38% HP; and G5: 15% carbamide peroxide (CP) (Opalescence PF - Ultradent, South Jordan UT, USA). For G1 and G3, HP was applied on the enamel surface for 3 consecutive applications activated by HL. Each application included 3x3' HL activations with 1' between each interval; for G2 and G4, HP was applied 3x15' with 15' between intervals; and for G5, 15% CP was applied for 120'/10 days at home. A spectrophotometer was used to measure color change before the treatment and after 24 h, 1 week, 1, 6, 12, 18 and 24 months. A VAS questionnaire was used to evaluate tooth sensitivity before the treatment, immediately following treatment, 24 h after and finally 1 week after. ResultsStatistical analysis did not reveal any significant differences between in-office bleaching with or without HL activation related to effectiveness; nevertheless the time required was less with HL. Statistical differences were observed between the results after 24 h, 1 week and 1, 6, 12, 18 and 24 months (intergroup). Immediately, in-office bleaching increased tooth sensitivity. The groups activated with HL required less application time with gel. ConclusionAll techniques and bleaching agents used were effective and demonstrated similar behaviors.
BackgroundEffective pain control in Dentistry may be achieved by local anesthetic techniques. The success of the anesthetic technique in mandibular structures depends on the proximity of the needle tip to the mandibular foramen at the moment of anesthetic injection into the pterygomandibular region. Two techniques are available to reach the inferior alveolar nerve where it enters the mandibular canal, namely indirect and direct; these techniques differ in the number of movements required. Data demonstrate that the indirect technique is considered ineffective in 15% of cases and the direct technique in 1329% of cases.ObjectiveObjective: The aim of this study was to describe an alternative technique for inferior alveolar nerve block using several anatomical points for reference, simplifying the procedure and enabling greater success and a more rapid learning curve.Materials and MethodsA total of 193 mandibles (146 with permanent dentition and 47 with primary dentition) from dry skulls were used to establish a relationship between the teeth and the mandibular foramen. By using two wires, the first passing through the mesiobuccal groove and middle point of the mesial slope of the distolingual cusp of the primary second molar or permanent first molar (right side), and the second following the oclusal plane (left side), a line can be achieved whose projection coincides with the left mandibular foramen.ResultsThe obtained data showed correlation in 82.88% of cases using the permanent first molar, and in 93.62% of cases using the primary second molar.ConclusionThis method is potentially effective for inferior alveolar nerve block, especially in Pediatric Dentistry.
In the daily routine of the Hospital for Research and Rehabilitation of Cleft Lip and Palate, a high frequency of natal/neonatal teeth was observed. Therefore, this retrospective study was conducted to determine the prevalence of this anomaly in 692 patients with complete unilateral and 327 bilateral cleft lip and palate, who were less than 3 months old, without prior surgery, and registered at the Hospital from 1989 to 1994. A higher prevalence of such teeth was found in the complete bilateral cleft group (10.6%), than in the complete unilateral cleft group (2.02%). Both, however, were higher than that reported for noncleft groups. There were also different characteristics in the appearance of these teeth in cleft patients from those previously related in the literature for normal patients. The conclusion was that these differences constitute another particularity of the cleft lip and palate patient.
In the daily routine of the Hospital for Research and Rehabilitation of Cleft Lip and Palate, a high frequency of natal/neonatal teeth was observed. Therefore, this retrospective study was conducted to determine the prevalence of this anomaly in 692 patients with complete unilateral and 327 bilateral cleft lip and palate, who were less than 3 months old, without prior surgery, and registered at the Hospital from 1989 to 1994. A higher prevalence of such teeth was found in the complete bilateral cleft group (10.6%), than in the complete unilateral cleft group (2.02%). Both, however, were higher than that reported for noncleft groups. There were also different characteristics in the appearance of these teeth in cleft patients from those previously related in the literature for normal patients. The conclusion was that these differences constitute another particularity of the cleft lip and palate patient.
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