RESUMO
Objective: To investigate the effects of biomaterial capping agents mineral trioxide polymer (MTA), calcium hydroxide iodoform paste (CHI) and calcium hydroxide (CH), in the pulpectomy of deciduous molars. Methods: 96 children undewent deciduous molar pulpectomy were included and divided into MTA, CHI and CH groups (n = 32), MTA, CHI and CH were respectively usd as capping agents for the 3 groups. The patients were regularly examined clinically and by X-ray at 3, 6 and 12 months after surgery. Results: 3 months after treatment the total effective rate of MTA, CHI and CH groups was 100％, 96. 88％ and 96. 88％ respectively (P＞ 0. 05), 6 months after operation 90. 63％, 93. 75％ and 78. 13％ respectively (P＞ 0. 05), 12 months after operation. 87. 50％, 84. 38％ and 59. 38％ respectively (P ＜ 0. 05) . There was no significant difference in root resorption between the 3 groups at 3 months and 6 months after surgery (P＞ 0. 05) . 12 months after operation, the non-root resorption rate of MTA, CHI and CH group was 93.75％, 87. 50％ and 50. 00％ respectively (P ＜ 0. 05) . The mild root resorption rate of group MTA, CHI and CH was 3. 13％, 9. 38％and 21. 88％; the moderat resorption 3. 13％, 3. 13％ and 18. 75％; the severe resorption 0, 0 and 9. 38, respectively. Conclusion:MTA and CHI used as capping agents are effective in pulpotomy, CH is prone to root absorption, which leads to treatment failure.
RESUMO
OBJECTIVE: To optimize the formulation of iodoform paste for root canal filling of deciduous teeth. METHODS: Using multi-indicators comprehensive scoring method, which takes the delicate degree, lubricity, difficulty of root canal filling, and difficulty of removal as performance indicators, the matrix type was screened, and the formulation of paste was optimized by orthogonal experimental design. The content of iodoform in the optimized paste was determined by UV spectrophotometry. RESULTS: Dimethicone was chosen as the paste matrix by comprehensive scoring of indicators. The results of orthogonal test showed that the ratio of iodoform and zinc oxide was the main factor affecting the performance of the paste, and the optimal formulation of paste was as follows: the ratio of iodoformto zinc oxide 3:7, clove oil 0.5%, and the ratio of powder to liquid 70:30.The linear range of the calibration curve for iodoform in the optimal paste was 48.75-146.22 μg·mL-1, A = 6.781 3C-0.051 6(r=0.999 6); and the average recovery rate was 99.83% (n=9). CONCLUSION: The optimal iodoform paste has a simple preparation, fine and smooth for root canal filling of deciduous teeth. The assay method is accurate and reliable for the quality control of iodoform paste.
RESUMO
OBJETIVO: evaluar el comportamiento clínico y radiográfico de tratamientos de pulpotomía realizados con formocresol y con pasta iodoformada en molares primarios. MATERIALES Y MÉTODOS: se seleccionó una muestra no probabilística de 21 niños de ambos sexos con edades comprendidas entre 3 y 8 años, que asistieron al Servicio de Odontopediatría del Instituto Autónomo Hospital Universitario de los Andes (IAHULA), Mérida - Venezuela, a los que se le realizaron tratamientos de pulpotomía en molares primarios vitales con exposición pulpar por caries. Los molares seleccionados fueron divididos aleatoriamente en dos grupos en función al tipo de material (grupo 1: formocresol y grupo 2: pasta iodoformada). La muestra fue observada al mes, a los dos y a los tres meses de realizados los tratamientos, para evaluar la presencia de signos y síntomas clínicos y radiográficos de patología pulpar. RESULTADOS: el Test exacto de Fisher demostró que no existen diferencias estadísticamente significativas entre los materiales empleados (p=0,351 y 0,176). Encontrándose un éxito del 81,8% con la técnica del formocresol y un 90,9 % con la técnica de la pasta iodoformada. Los hallazgos clínicos y radiográficos observados durante el tiempo de evaluación fueron, inflamación, fístula, zonas radiolúcidas perifurcales, reabsorción radicular patológica externa, reabsorción radicular interna, siendo este último hallazgo el más frecuente (técnica del formocresol 3,03%, técnica de la pasta iodoformada 1,51%). CONCLUSIONES: tanto el formocresol como la pasta iodoformada son materiales que pueden ser empleados para la obturación de pulpotomías en molares primarios. Por tanto, se puede considerar a la pasta iodoformada como una alternativa al uso del formocresol en la terapia pulpar de molares primarios vitales.
PURPOSE: evaluate the clinical and radiographic behaviour of pulpotomy treatments performed with formocresol and iodoform paste in primary molars. MATERIALS AND METHODS: a non probabilistic sample was selected which consisted of 21 children of both sexes ranged in age from 3 to 8 years, who attended to the Pediatric Dentistry Service of the Autonomous Institute Andes's University Hospital, Mérida - Venezuela. Pulpotomy treatments were performed in vital primary molars with carious pulpal exposure. The selected molars were randomly separated according to the material (1st group: formocresol and 2nd group: iodoform paste). The sample was observed into 1, 2 and 3 month after the treatment in stead to evaluate the apparition of clinic and radiographic sings and symptoms of pulpal pathology. RESULTS: the Fisher's exact test showed that there were not statistically significant differences between both materials (p=0,351 y 0,176). It were found a success rates of 81,8% with the formocresol technique and 90,9% with the iodoform paste technique. The clinic and radiographic founds observed during the evaluation period were swelling, fistulation, perifurcal radiolucency, external pathologic radicular resorption, internal radicular resorption. The last one was the most frequently found observed (formocresol technique 3,03%, iodoform paste technique 1,51%). CONCLUSIONS: either formocresol or iodoform paste can be used as obturating materials for pulpotomies in primary molars. Therefore, the iodoform paste can be considered as an alternative to the formocresol use in the primary molar pulpal therapy.