Apical root canal cleaning after preparation with endodontic instruments: a randomized trial in vivo analysis

Objectives@#This study aimed to evaluate vital pulp tissue removal from different endodontic instrumentation systems from root canal apical third in vivo @*Materials and Methods@#Thirty mandibular molars were selected and randomly divided into 2 test groups and one control group. Inclusion criteria were a positive response to cold sensibility test, curvature angle between 10 and 20 degrees, and curvature radius lower than 10 mm. Root canals prepared with Hero 642 system (size 45/0.02) (n = 10) and Reciproc R40 (size 40/0.06) (n = 10) and control (n = 10) without instrumentation. Canals were irrigated only with saline solution during root canal preparation. The apical third was evaluated considering the touched/untouched perimeter and area to evaluate the efficacy of root canal wall debridement. Statistical analysis used t-test for comparisons. @*Results@#Untouched root canal at cross-section perimeter, the Hero 642 system showed 41.44% ± 5.62% and Reciproc R40 58.67% ± 12.39% without contact with instruments.Regarding the untouched area, Hero 642 system showed 22.78% ± 6.42% and Reciproc R40 34.35% ± 8.52%. Neither instrument achieved complete cross-sectional root canal debridement. Hero 642 system rotary taper 0.02 instruments achieved significant greater wall contact perimeter and area compared to reciprocate the Reciproc R40 taper 0.06 instrument. @*Conclusions@#Hero 642 achieved higher wall contact perimeter and area but, regardless of instrument size and taper, vital pulp during in vivo instrumentation is not entirely removed.

Apical root canal cleaning after preparation with endodontic instruments: a randomized trial in vivo analysis

Objectives@#This study aimed to evaluate vital pulp tissue removal from different endodontic instrumentation systems from root canal apical third in vivo @*Materials and Methods@#Thirty mandibular molars were selected and randomly divided into 2 test groups and one control group. Inclusion criteria were a positive response to cold sensibility test, curvature angle between 10 and 20 degrees, and curvature radius lower than 10 mm. Root canals prepared with Hero 642 system (size 45/0.02) (n = 10) and Reciproc R40 (size 40/0.06) (n = 10) and control (n = 10) without instrumentation. Canals were irrigated only with saline solution during root canal preparation. The apical third was evaluated considering the touched/untouched perimeter and area to evaluate the efficacy of root canal wall debridement. Statistical analysis used t-test for comparisons. @*Results@#Untouched root canal at cross-section perimeter, the Hero 642 system showed 41.44% ± 5.62% and Reciproc R40 58.67% ± 12.39% without contact with instruments.Regarding the untouched area, Hero 642 system showed 22.78% ± 6.42% and Reciproc R40 34.35% ± 8.52%. Neither instrument achieved complete cross-sectional root canal debridement. Hero 642 system rotary taper 0.02 instruments achieved significant greater wall contact perimeter and area compared to reciprocate the Reciproc R40 taper 0.06 instrument. @*Conclusions@#Hero 642 achieved higher wall contact perimeter and area but, regardless of instrument size and taper, vital pulp during in vivo instrumentation is not entirely removed.

Hipomelanose de Ito: relato de caso / Hypomelanosis of Ito: case report

Objetivo: Os autores têm como objetivo relatar um caso de hipomelanose de Ito (HI), um a síndrome neurocutânea rara, com alterações neurológicas e cromoss6omicas associadas ao comprometimento cutâneo e pneumonias de repetição. Relato de caso e referente a um paciente masculino, 1 ano e 11 meses, internado no Hospital Universitário São Vicente de Paulo por broncopneumonia bilateral. Ao exame foram observadas máculas hipocromicas na pele compatíveis com HI, além de atraso do desenvolvimento neuropsicomotor. O paciente foi submetido à biópsia incisional de pele das lesões do abdomen, eletroencefalograma, ressonância magnética e estudo citogenético. Resultados: Os exames histológicos e imunoistoquímico e evidenciaram ausência de melanina e diminuição de melanócitos em áreas focais da epiderme, respectivamente. O eletroencefalograma apresentou disfunção córtico-subcortical difusa. A ressonância magnética temporal. O cariótipo evidenciou mosaicismo cromossômico com uma linhagem normal (46,XY) e uma linhagem celular que apresentava deleção intersticial nas bandas 22.2 - 24.2 do braço longo do cromossomo 10 (25 por cento). Conlusões: Os autores, com o presente estudo, destacam a importância das lesões de pele na definição etiológica das desordens neuropediátricas