Effect of MTA-based sealer on the healing of periapical lesions.

UNLABELLED: Some manufacturers have recently added specific components to improve the ease of handling and insertion material properties of MTA in order to create MTA-based sealers. OBJECTIVE: The aim of this study was to evaluate the healing of periapical lesions in canine teeth after a single session of endodontic treatment with MTA Fillapex® compared with Sealapex® or Endo-CPM-Sealer®. MATERIAL AND METHODS: Sixty-two root canals were performed on two 1-year-old male dogs. After coronal access and pulp extirpation, the canals were exposed to the oral cavity for 6 months in order to induce periapical lesions. The root canals were prepared, irrigated with a solution of 2.5% sodium hypochlorite and filled with gutta-percha and different sealers, according to the following groups: 1) Sealapex®; 2) Endo-CPM-Sealer®; and 3) MTA Fillapex®. Some teeth with periapical lesions were left untreated for use as positive controls. Healthy teeth were used as negative controls. After 6 months, the animals were sacrificed and serial sections from the roots were prepared for histomorphologic analysis and stained with hematoxylin and eosin and the Brown and Brenn technique. The lesions were scored according to pre-established histomorphologic parameters and the scores statistically analyzed using the Kruskal-Wallis test. RESULTS: All 3 materials produced similar patterns of healing (p>0.05); in particular, persistent inflammation and absence of complete periapical tissue healing were consistently noted. CONCLUSIONS: Preparation of the infected root canals followed by filling with the materials studied was insufficient to provide complete healing of the periapical tissues.

Effect of MTA-based sealer on the healing of periapical lesions

Some manufacturers have recently added specific components to improve the ease of handling and insertion material properties of MTA in order to create MTA-based sealers. Objective The aim of this study was to evaluate the healing of periapical lesions in canine teeth after a single session of endodontic treatment with MTA Fillapex® compared with Sealapex® or Endo-CPM-Sealer®. Material and Methods Sixty-two root canals were performed on two 1-year-old male dogs. After coronal access and pulp extirpation, the canals were exposed to the oral cavity for 6 months in order to induce periapical lesions. The root canals were prepared, irrigated with a solution of 2.5% sodium hypochlorite and filled with gutta-percha and different sealers, according to the following groups: 1) Sealapex®; 2) Endo-CPM-Sealer®; and 3) MTA Fillapex®. Some teeth with periapical lesions were left untreated for use as positive controls. Healthy teeth were used as negative controls. After 6 months, the animals were sacrificed and serial sections from the roots were prepared for histomorphologic analysis and stained with hematoxylin and eosin and the Brown and Brenn technique. The lesions were scored according to pre-established histomorphologic parameters and the scores statistically analyzed using the Kruskal-Wallis test. Results All 3 materials produced similar patterns of healing (p>0.05); in particular, persistent inflammation and absence of complete periapical tissue healing were consistently noted. Conclusions Preparation of the infected root canals followed by filling with the materials studied was insufficient to provide complete healing of the periapical tissues. .

The association between prune belly syndrome and dental anomalies: a case report.

BACKGROUND: Prune belly syndrome is a rare condition produced by an early mesodermal defect that causes abdominal abnormalities. However, the literature indicates that disturbances related to ectodermal development may also be present. This is the first case report in the literature to suggest that dental abnormalities are part of the broad spectrum of clinical features of prune belly syndrome. Because the syndrome causes many serious medical problems, early diagnosis of abnormalities involving the primary and permanent dentitions are encouraged. CASE PRESENTATION: The authors report the clinical case of a 4-year-old Caucasian boy with prune belly syndrome. In addition to the triad of abdominal muscle deficiency, abnormalities of the gastrointestinal and urinary tracts, and cryptorchidism, a geminated mandibular right central incisor, agenesis of a mandibular permanent left incisor, and congenitally missing primary teeth (namely, the mandibular right and left lateral incisors) were noted. CONCLUSION: This original case report about prune belly syndrome highlights the possibility that dental abnormalities are a part of the broad spectrum of clinical features of the syndrome. Therefore, an accurate intra-oral clinical examination and radiographic evaluation are required for patients with this syndrome in order to provide an early diagnosis of abnormalities involving the primary and permanent dentitions.

Acurácia das medidas de limas endodônticas em radiografias digital e convencional: estudo in vitro em dentes decíduos / Conventional and digital endodontic files measurement accuracy: an in vitro on primary teeth

O presente estudo tem por objetivo avaliar a acurácia das medidas de limas endodônticas obtidas em radiografias digitais e convencionais de dentes decíduos. Para tanto, limas tipo K e Hedstroen calibre 20, com cursor registrando o comprimento aparente do dente, foram introduzidas no interior do canal de 18 incisivos decíduos extraídos, que foram radiografados pela técnica digital direta e convencional. Medidas da distância do cursor à extremidade apical da lima foram realizadas por um profissional treinado e repetidas no intervalo de uma semana, com auxílio de régua eletrônica na radiografia digital e paquímetro digital na radiografia convencional. Os dados obtidos foram analisados pelo teste de correlação de Pearson e teste t (p=0,05). A correlação entre o primeiro e o segundo exames foi r=0,99, independentemente do tipo de lima utilizado, tanto para a radiografia digital quanto para a convencional. Em relação ao tipo de lima, Kerr ou Hedströen, a concordância foi r=0,99 nos dois métodos radiográficos. Comparando-se as medidas obtidas na radiografia digital com as da convencional, a concordancia foi r=0,96 para as limas tipo K e r=0,95 para as limas Kedströen. Os valores de comprimento das limas na radiografia digital foram estatisticamente inferiores aos obtidos na radiografia convencional (p=0,02); no entanto, as medidas obtidas nos dois métodos radiográficos foram estatisticamente semelhantes ao compromisso real do dente tanto para as limas tipo K (p=0,029) quanto para as limas Heddströes (p=0,18). Conclui-se que a radiografia digital se mostrou um método confiável para obtenção do comprimento de limas endodônticas

Digital versus conventional radiography for determination of primary incisor length

Aim: This in vitro study evaluated the accuracy of primary incisor lengths determined by digital and conventional radiography compared to the actual tooth length. Methods: Twenty extracted primary maxillary incisors were mounted in acrylic blocks. Tooth length was estimated by using a straight-line measurement provided by the distance measurement tool of a digital dental imaging system (Computed Dental Radiography, Schick Technologies Inc.) and conventional E-speed film radiographs by using a digital caliper. Two operators familiar with both radiographic methods performed the estimates. The estimated tooth lengths were compared to the actual tooth lengths measured with the digital caliper. Data were statistically analyzed by Dahlberg’s equation, paired t test, Pearson’s correlation coefficient and ANOVA at 5% significance level. Results: There were no statistically significant differences (p = 0.85) between tooth length estimated on digital and conventional radiographs. Admitting as clinically acceptable a 0.5-mm discrepancy between the actual tooth lengths and the radiographically estimated lengths, 60% of the radiographic measurements were considered as accurate. When the acceptable difference range was 1.0 mm, the accuracy of the radiographic measurements increased to 100%. Conclusions: Digital and conventional radiography provided similar tooth length measurements and were equivalent to the actual tooth lengths.

Primary tooth length determination in direct digital radiography: an in vivo study.

PURPOSE: The purpose of this in vivo study was to compare the accuracy of primary incisor length determined by direct digital radiography (straight-line measurement and grid superimposition) and measurement of the actual tooth length. METHODS: Twenty-two primary maxillary incisors that required extractions were selected from 3- to 5-year-old children. The teeth were radiographed with an intraoral sensor using the long cone technique and a sensor holder (30-cm focus-to-sensor distance). The exposure time was 0.3 seconds. Tooth length was estimated by using straight-line and grid measurements provided by the distance measurement feature of the Computed Dental Radiography digital dental imaging system. The actual tooth length was obtained by measuring the extracted tooth with a digital caliper. Data were analyzed statistically by Pearson's correlation coefficient and a paired t test. RESULTS: There were statistically significant differences (P=.007) between the 2 measurement techniques and between the actual tooth lengths and grid measurements. There was no statistically significant difference (P=38) between straight-line measurements and actual tooth lengths, showing that the straight-line measurements were more accurate. Underestimation of the actual tooth length, however, occurred in 45% of the straight-line measurements and in 73% of the grid measurements. CONCLUSION: It is possible to determine primary tooth length in digital radiographs using onscreen measurements with a reasonable degree of accuracy.

Avaliação da efetividade da radiografia digital em odontometria de dentes decíduos / Effectiveness of digital radiography in odontometry determination in primary teeth

O objetivo deste estudo foi avaliar comparativamente os valores de odontometria obtidos em radiografia convencional e digital de dentes decíduos utilizando-se diferentes instrumentos de medida. Duas radiografia periapicais, uma convencional e outra digital foram obtidas de 22 incisivos decíduos com extração indicada de crianças entre 3 e 5 anos de idade. As radiografias foram medidas por um único examinador. A aplicação da análise estatística dos dados obtidos demonstrou que: 1) os valores de odontometria obtidos na radiografia digital utilizando a régua eletrônica e a grade apresentaram alto grau de concordância, e foram diferentes estatisticamente; sendo que a régua eletrônica produziu valores maiores; 2) na radiografia convencional, utilizando-se o paquímetro e régua milimetrada, os valores apresentaram alto grau de concordância sendo, no entanto, estatisticamente diferentes; apresentando a régua milimetrada valores maiores; 3) os valores de odontometria realizada na radiografia digital com régua eletrônica foram estatisticamente iguais ao comprimento real do dente

The aim of the study was to evaluate odontometry measures in deciduous teeth in convenctional and digital radiographies using differents measuring instruments. Twenty two primary maxillary incisors with diagnose of extraction were selected from children aged from 3 to 5. Two preoperative radiographys were made from each teeth using radiographic film and digital sensor. The lenght of the teeth on the both radiographic images was evaluated by one examiner. Statistical analyses showed that: 1) Odontometry in digital radiography using eletronic ruler and grid showed high level of agreement and statistical difference; 2) Conventional radiography, measured using milimeter ruler and clliper showed high level of agreement and statistical difference; 3) Odontometry obtained in digital radiography using eletronic ruler showed no statistic difference compared to true teeth lenght

Amálgama convencional X amálgama adesivo - relato de caso em molares decíduos de um mesmo paciente / Amalgama X bonding amalgam - clinical observation in deciduous teeth

Os autores relatam o controle clínico, radiográfico e o aspecto microscópico após a esfoliação, de uma restauração de amálgama convencional e uma de amálgama aderido às estruturas dentárias com Panávia EX em molares decíduos