Validity of the radiographic assessment of ankylosis: Evaluation of long-term reactions in 10 monkey incisors

Abstract

The accuracy and sensitivity of radiographic assessments of reactive processes in dental tissues were evaluated by comparison of radiographs and histologic sections. Experimental lesions inflicted on the roots of 10 monkey incisors had been observed by means of serially obtained radiographs over a period of 315 to 370 days. The material was used for evaluation of radiographic assessment of ankylosis. For comparative purposes, assessment of the experimental lesion penetrating to the pulp and periapical radiolucency was added. True and falsely positive or negative recordings formed the basis for calculation of the accuracy and sensitivity of the radiographic assessment. The sensitivity, or the observers' ability to detect the actual changes, was high for pulp penetration, intermediate for inflammation, and low for ankylosis.

Diagnosis and Treatment of Endodontically Treated Teeth with Vertical Root Fracture: Three Case Reports with Two-year Follow-up

“…Andersson et al (25) showed that ankylotic areas of teeth were evident radiographically when the ankylosis was located on the proximal surfaces of the root, but they were not evident when the ankylosis occurred on the lingual or labial surfaces. Radiographic examination is considered to be of limited value in the early detection of ankylosis because of the 2-dimensional nature of the image (26). The initial location of ankylosis is often on the labial and lingual root surfaces, complicating radiographic detection (25,26).…”

“…Radiographic examination is considered to be of limited value in the early detection of ankylosis because of the 2-dimensional nature of the image (26). The initial location of ankylosis is often on the labial and lingual root surfaces, complicating radiographic detection (25,26).…”

Restoration of a vertical alveolar bone defect by orthodontic relocation of a mesially impacted mandibular first molar

“…24,25 Conventional 2-dimensional radiographic examinations such as periapical or panoramic radiographs cannot show the ankylosed areas on the labial or lingual root surfaces. 26,27 Multislice computed tomography, which was reported to be superior to cone-beam computed tomography for the visualization of the periodontal ligament space, 28 can often show the ankylosed area. 29 However, considering the spatial resolution of multislice computed tomography used for the craniofacial region, which is determined by several factors including slice thickness and pitch factors, it also cannot reliably detect the focal area of ankylosis, which can cause the tooth not to respond to the orthodontic force.…”

Treatment of Necrotic Calcified Tooth Using Intentional Replantation Procedure

“…We evaluated the tooth's mobility and percussion sound during our controls to detect the ankylosis; because we know that the initial locations of ankylosis are usually on the lingual and/or labial tooth surfaces [21, 22], and it has been demonstrated that if an ankylotic area is located in these parts of a tooth, it will not be radiographically detectable [21]. …”