root canal treatment of primary molars using photodynamic therapy

The following criteria will be used for the determination of treatment success or failure:

1. Repair (= success) Clinically: absence of signs and symptoms.
2. Lack of repair (= failure) Clinically: signs and symptoms indicative of acute apical periodontitis.

The following criteria will be used for the determination of treatment success or failure:

1. Complete repair (= success) Radiographically: absence of pathological root resorption, normal width of periodontal ligament space, absence of lesion development in periapical regions in cases of absence of lesion in the initial diagnostic radiograph and complete regression of lesion in cases of presence of lesion in the initial diagnostic radiograph.
2. Incomplete repair (= success) Radiographically: absence of pathological root resorption and reduction lesion size in the periapical region.
3. Lack of repair (= failure) Radiographically: presence of pathological root resorption, lesion in furcation/periapical region unchanged in size during follow-up period, increase in lesion size or the development of a new lesion.