ABSTRACT
The aim of this study was to evaluate age-related morphological canal changes in mesial root canals of mandibular first molars of known ages. Fifty-six specimens were selected for this study and distributed into the following four age groups (n. 14): a) Group of children under 13 years, b) Group of adolescents (from 14 to 19 years), c) Group of young adults (from 20 to 39 years) and d) Group of older adults (over 40 years). The specimens were in perfect condition because after extraction they were carefully cleaned, sterilized, identified and stored in water. In order to improve the cleaning, they were placed in 1% sodium hypochlorite solution for four hours and rinsed in 10 vol. hydrogen peroxide for 8 hours. After that, a clearing technique was performed to illustrate root canal anatomy. Digitalized images of all samples were obtained by use of a stereomicroscope. Canals were noticeably simpler in older adults: they were sharply defined and narrow, sometimes too narrow. Calcification nuclei were not found and there were only a few remains of internuclear spaces. The canal system appeared cleaner, clearer and more sharply defined than in the other age groups. It may be concluded that there is a correlation between aging and morphological changes in the mesial root canals of mandibular first molars.
Subject(s)
Aging/pathology , Dental Pulp Cavity/anatomy & histology , Molar/anatomy & histology , Adolescent , Adult , Anatomic Variation , Child , Humans , Hydrogen Peroxide/therapeutic use , Image Processing, Computer-Assisted/methods , Mandible/anatomy & histology , Sodium Hypochlorite/therapeutic use , Tissue Fixation/methods , Tooth Apex/anatomy & histology , Young AdultABSTRACT
The aim of this study was to evaluate age-related morphologicalcanal changes in mesial root canals of mandibular first molars ofknown ages. Fifty-six specimens were selected for this study anddistributed into the following four age groups (n. 14): a) Groupof children under 13 years, b) Group of adolescents (from 14 to19 years), c) Group of young adults (from 20 to 39 years) and d)Group of older adults (over 40 years). The specimens were in perfectcondition because after extraction they were carefullycleaned, sterilized, identified and stored in water. In order toimprove the cleaning, they were placed in 1% sodium hypochloritesolution for four hours and rinsed in 10 vol. hydrogenperoxide for 8 hours. After that, a clearing technique was performedto illustrate root canal anatomy. Digitalized images of allsamples were obtained by use of a stereomicroscope. Canals werenoticeably simpler in older adults: they were sharply defined andnarrow, sometimes too narrow. Calcification nuclei were notfound and there were only a few remains of internuclear spaces.The canal system appeared cleaner, clearer and more sharplydefined than in the other age groups. It may be concluded thatthere is a correlation between aging and morphological changesin the mesial root canals of mandibular first molars...
O objetivo do presente estudo foi avaliar as alterações morfológicasrelacionadas com a idade em canais radiculares mesial deprimeiros molares inferiores. Cinqüenta e seis espécimes foramselecionados para este estudo. Os espécimes foram distribuídosem quatro grupos etários (n. 14): a) Grupo de crianças menoresde 13 anos, b) grupo de adolescentes (de 14 a 19 anos), c) Grupode jovens adultos (de 20 a 39 anos ) e d) Grupo de adultos (acimade 40 anos). Após as extrações os elementos foram cuidadosamentelimpos, esterilizados, identificadas e armazenadas emágua. A fim de melhorar a limpeza, foram colocados numasolução de hipoclorito de sódio a 1%, durante quatro horas eenxaguados em 10 vol. peróxido de hidrogénio durante 8 horas.Depois, uma técnica de diafanização foi realizada para ilustrar aanatomia do canal radicular. As imagens digitalizadas de todasas amostras foram obtidas através da utilização de um estereoscópio.Os canais foram visivelmente mais simples em adultosmais velhos: eles foram bem definidas e estreito, por vezes,demasiado estreito. Núcleo de calcificação não foi encontrado ehavia apenas alguns restos de espaços internucleares. O sistemade canal apareceu mais limpa, mais clara e mais bem definidado que nas outras faixas etárias. Pode-se concluir que há umacorrelação entre as alterações do envelhecimento e morfológicasnos canais radiculares mesial de primeiros molares inferiores...
Subject(s)
Humans , Male , Adolescent , Adult , Female , Child , Young Adult , Dental Pulp Cavity/anatomy & histology , Dentition, Permanent , Aging/physiology , Mandible , Molar/anatomy & histology , Age Factors , Microscopy/methods , Root Canal Preparation/methods , Data Interpretation, StatisticalABSTRACT
The aim of this study was to evaluate age-related morphological canal changes in mesial root canals of mandibular first molars of known ages. Fifty-six specimens were selected for this study and distributed into the following four age groups (n. 14): a) Group of children under 13 years, b) Group of adolescents (from 14 to 19 years), c) Group of young adults (from 20 to 39 years) and d) Group of older adults (over 40 years). The specimens were in perfect condition because after extraction they were carefully cleaned, sterilized, identified and stored in water. In order to improve the cleaning, they were placed in 1
sodium hypochlorite solution for four hours and rinsed in 10 vol. hydrogen peroxide for 8 hours. After that, a clearing technique was performed to illustrate root canal anatomy. Digitalized images of all samples were obtained by use of a stereomicroscope. Canals were noticeably simpler in older adults: they were sharply defined and narrow, sometimes too narrow. Calcification nuclei were not found and there were only a few remains of internuclear spaces. The canal system appeared cleaner, clearer and more sharply defined than in the other age groups. It may be concluded that there is a correlation between aging and morphological changes in the mesial root canals of mandibular first molars.
