Abstract
The present study was undertaken to investigate the change of hypersesitivity following the surgical periodontal treatment, involving gingivectomy and flap operation for a period of eight weeks. We obtained the following results:
The exposed root surfaces displayed the highest sensitivity one week after the operation, but this high sensitivity level did not remain for a long time. Furthermore, in many cases, after the elapse of eight weeks, post operative sensitivity had naturally desensitized. It is presumed that the peak sensitivity observed in the early days after the operation might be mainly due to the exposure of root dentin directly to the oral environment as a result of the removal of almost all cementum layer after thhe surgical periodontal treatment, and that the hypermineralization in the surface layer by minerals derived from saliva might participate the gradual decrease of the sensitivity.
The teeth of the young group, compared to those of the old group, showed a higher incidence and degree of post operative hypersensitivity. And the improvement of this hypersensitivity required longer time in young group.
The correlationship between the degree of sensitivity and the width of exposed root surface was recognized for the period up to 2 weeks after the operation. But in 4 weeks and 8 weeks after the operation there was no correlationship.
