Effect of various concentrations of tetracycline hydrochloride demineralization on root dentin surface: A scanning electron microscopic study

Does an autogenous demineralized dentin (ADDM) graft has the ability to form a new bone?

Aim:

This aimed to evaluate a new bone formation and to provide a single-stage treatment, i.e., extraction of tooth followed by autogenous dentin demineralized (ADDM) graft in the same extraction socket (ES) – for adult patients who require tooth extraction.

Materials and Methods:

Two hundred teeth extractions were performed to investigate the efficacy of ADDM graft in the formation of new bone. After demineralization of dentin graft parameters such as exposure of graft, any signs of infections/pus/exudates, pain, and bone density were evaluated.

Results:

On follow-up, exposure of graft was recorded in five sockets at 1 month and infection was recorded in four sockets. Pain was significantly high at postoperative day 1 and least with 3^rd and 6^th months. There was a highly significant bone formation (P < 0.01, 0.05) in the ES group at various time intervals, while there were no significant differences in the adjacent bone group.

Conclusion:

Using ADDM graft in providing a single-stage treatment plan, i.e., extraction of tooth followed by autogenous demineralized dentin graft in the same ES in adult patients – is an alternative for the immediate reconstruction of alveolar bone defects to facilitate the future prosthesis. It also saves the cost of other graft materials which are commercially available in market for the patient and also reduces the infective dental waste globally.

The Effect of Four Commonly Used Root Conditioner Agents in Different Time Periods Applied on Periodontally Diseased and Healthy Teeth

STATEMENT OF PROBLEM

Root surface contamination or infection can potentially change the consequences of regenerative periodontal therapies and therefore the modification and disinfection of the contaminated root surfaces are necessary.

OBJECTIVES

This study aimed to compare the surface characteristics of the extracted human teeth after exposure to four root conditioners in different time periods.

MATERIALS AND METHODS

The study samples were prepared from 40 freshly extracted teeth including 20 affected teeth with periodontal diseases and 20 healthy teeth. After performing root planning, 240 dentinal block samples were prepared and each affected and healthy sample was randomly allocated to receive one of the following root conditioners; Ethylenediaminetetraaceti acid (EDTA), citric acid, doxycycline, and tetracycline or rinsed with normal saline as the control agent. The prepared specimens were evaluated using scanning electron microscope and the inter-group differences and changes in study indices; dentin (%), tubular spaces (%), and diameter of dentinal tubules (μm²) were compared using one-way ANOVA test.

RESULTS

In the control group receiving normal saline, the changes in the indicators of dentin, tubular spaces, and diameter of dentinal tubules remained insignificant in all time periods. EDTA, citric acid, and tetracycline had chelating effects on the study indices; however, doxycycline led to gradual decrease of the tubular space and diameter as well as increase in dentin percentage.

CONCLUSIONS

In different time intervals and when considering healthy or affected tooth surfaces, the effect of conditioning agents could be different. Amongst the four agents used, EDTA and tetracycline consistently increased the diameter of tubules and percentage of patent tubules in both healthy and diseased teeth.