Final answer:
A pulpotomy using calcium hydroxide can cause an acute inflammatory reaction, potentially lead to internal resorption, and is frequently used as the treatment of choice for small mechanical exposures in primary teeth. It might not be accurate to say that it is successful in 90 percent of cases for all types of pulpotomies. Additionally, it typically does not stimulate apical closure in primary teeth.
Step-by-step explanation:
In primary teeth, a pulpotomy using calcium hydroxide is a procedure performed to try to save and repair a tooth that has been damaged by decay. Calcium hydroxide is typically used in dental procedures for its therapeutic properties. However, its use in pulpotomy treatments can be associated with certain outcomes.
When referring to the options provided:
A pulpotomy using calcium hydroxide can indeed lead to an acute inflammatory reaction, as it may irritate the pulp tissue. This reaction could be part of the healing process or may indicate a complication.
While calcium hydroxide has been a traditional material for apexification in order to stimulate a calcific barrier in a root with an open apex, and it might stimulate apical closure in immature permanent teeth, its effect is not typically associated with stimulating apical closure in primary teeth.
Calcium hydroxide is known to be caustic and, in some cases, can lead to internal resorption, a process where the dentin and sometimes the enamel start to dissolve from the inside out. This can happen as a response to the material within the tooth.
However, calcium hydroxide has also been used successfully in many cases of dental surgeries. It has been reported to have a relatively high success rate in various types of pulpotomies, but saying it is successful in 90 percent of cases might not be accurate for all types of pulpotomies and depends on numerous factors.
For small mechanical exposures, calcium hydroxide has been used as the treatment of choice because of its ability to protect the pulp and promote the formation of reparative dentin. However, contemporary treatments might use different materials or methods, as dental practices evolve over time.
Microbes contribute to tooth decay primarily through the production of acids as a byproduct of their metabolism, which then dissolves the calcium crystals in the enamel. The most important cariogenic species of bacteria is Streptococcus mutans.