Effectiveness of caries removal by the partial tunnel preparation method

Area of Science:

• Restorative Dentistry
• Cariology
• Dental Materials Science

Background:

• The partial tunnel preparation method aims to remove approximal caries via an occlusal channel, preserving the marginal ridge.
• This technique presents challenges in accessing and ensuring complete caries removal due to limited visibility.
• Uncertainty regarding the efficacy of this minimally invasive approach necessitates further investigation.

Purpose of the Study:

• To evaluate the effectiveness of the partial tunnel preparation method in removing caries.
• To assess the quality of glass polyalkenoat (ionomer) fillings used in conjunction with this method.
• To examine the proximity of the prepared cavities to the dental pulp.

Main Methods:

• Sixty extracted premolars and molars were subjected to the partial tunnel preparation method.
• Caries removal effectiveness was assessed through examination of sectioned teeth.
• Glass polyalkenoat filling integrity and distance to the pulp were also analyzed.

Main Results:

• Residual caries were detected in the axial wall of 2 teeth and in dentin near the enamel lesion in 10 teeth.
• The glass polyalkenoat material exhibited very few porosities.
• Minimal porosities were also observed at the interface between the filling and cavity walls.

Conclusions:

• The partial tunnel preparation method demonstrates limitations in achieving complete caries removal in a significant portion of cases.
• Glass polyalkenoat (ionomer) fillings exhibit good marginal adaptation and minimal internal defects when used with this technique.
• Further refinement of the partial tunnel preparation technique may be necessary to improve caries removal efficacy.