In General, incorrect root canal filling may result in not only disorders in eruption of permanent teeth, mastication but also systemic affect during pulp therapy including pulpitis and periodontitis of deciduous teeth of which incidence is very high among children. Therefore, it's of great importance to develop new effective root canal filling material so as to increase efficacy of root canal filling in pulp therapy of deciduous teeth.
Now MTA (Mineral Trioxide Aggregate) has been introduced as excellent material for root canal filling of deciduous teeth.
We've studied to develop new root canal filling material for deciduous teeth being in the process of growth and development in the Department of Pediatric Dentistry, Dental Faculty, Pyongyang Medical College of
Kumgang Mineral Complex including a lot of trace elements has excellent biocompatibility, absorption, antibacterial and anti-inflammatory effect.
We've cleared up the composition of root canal filling material for primary teeth and used it for root canal therapy in our practice.
We recognized that its rational rate is 70% of Kumgang Mineral Complex and 30% of Iodoform powders by observing the antibacterial efficacy, sealing ability and X-ray findings according to the concentration of Iodoform.
Kumgang Iodoform Powder shows no change in color and odor in 2 years after manufacture and we couldn't observe changes in physical property such as formation of mass from powders.
There was no significant difference between the antibacterial efficacy of Kumgang Iodoform Powder and Calcium Hydroxide-Iodoform paste (P>0.05).
The penetrating depth of dye of Kumgang Iodoform Powder observed in extracted teeth was 0.96±0.02mm in average after 10 days and it showed no significant difference from that of Calcium Hydroxide-Iodoform paste(P>0.05).
In our experiments on the biocompatibility of Kumgang Iodoform Powder, necrotic tissue and infiltration of inflammatory cells were recognized seriously and a little of proliferation of connective tissue were observed in contacted area with Kumgang Iodoform Powder.
LD50 of Kumgang Iodoform Powder is 7.74g/kg.
The efficacy of root canal filling is 96.7% and there was no significant difference (P>0.05).
We conclude that Kumgang Iodoform Powder is very effective material for root canal filling in deciduous teeth. Further more experimental and clinical studies on active natural minerals- Kumgang Mineral Complex are needed to expand its utility in the branch of dentistry.
