Biomedical subjects

E H Tammisalo

Publications and source records attributed to E H Tammisalo.

At least 19 recordsLinked to original sources

PubMed1995

A comparison of detailed zonography with periapical radiography for the detection of periapical lesions.

The diagnostic accuracy of detailed zonography using the Scanora multimodal X-ray system was compared with that of periapical radiography. The study was based on the detection of periapical bone lesions at 259 dental sites distributed evenly throughout the dentitions of 164 patients. Each site was examined by periapical radiography and zonography, in parallel. The zonograms consisted of four detailed images that could also be read as stereopairs, in either the horizontal or vertical direction. Five observers evaluated the sites for the presence or absence of periapical osteolysis or sclerosis and apical widening of the periodontal ligament space for the whole dentition, and for three dental regions. ROC analysis revealed no significant overall or regional differences between the diagnostic accuracies of the periapical and zonographic techniques, regardless of whether the zonograms were read as sets of four images (multiview) or stereoscopic images. The sensitivity of periapical radiography was 72%, that of multiview zonography 88%, and that of stereoscopic zonography 85%. Specificities were 93%, 84% and 89%, respectively. The energy imparted during detailed zonography was 0.98 mJ. It is concluded that zonography is as good as periapical radiography for the detection of periapical pathology.

Adult↗

PubMed1995

Radiographic detectability of periodontal diseases. A comparison of perapical radiography with detailed zonography.

OBJECTIVE: To compare the diagnostic accuracy of conventional periapical radiography with detailed zonography using the Scanora system for the detection of periodontal disease. METHODS: We selected for comparison 311 periodontal sites in 165 patients. Five observers independently assessed the periapical radiographs and detailed zonograms for marginal widening of periodontal ligament space, crestal erosion, vertical bone loss, furcation involvement and calculus. RESULTS: ROC analysis revealed no significant differences between the two imaging techniques for either overall or lesion-specific interpretation of periodontal pathology. The sensitivity of periapical radiography was 79%, and of detailed zonography 91% (multiview) and 89% (stereoscopic). Specificities were 82%, 77% and 83%, respectively. CONCLUSION: Detailed zonography performs as well as periapical radiography in the detection of periodontal disease.

Adult↗

PubMed1994

Comparison of periapical and detailed narrow-beam radiography for diagnosis of periodontal pathology.

The diagnostic performance of the detailed narrow-beam (DNB) technique of the Scanora multimodal X-ray system was compared with periapical radiography for detecting periodontal pathology. In total, 253 sites in 133 patients were examined. Receiver operating characteristics (ROC) of both imaging modalities were analyzed in relation to the ratings of five observers for the whole dentition, three dental regions and five types of periodontal lesion. ROC analysis demonstrated that the overall diagnostic performance of DNB radiography was better (P < 0.05) than that of periapical radiography. DNB radiography was significantly superior (P < 0.01) for detecting marginal widening of periodontal membrane space, but there was no significant difference between the two techniques for crestal erosion, vertical bone loss, furcation involvement or calculus. The regional differences found in overall diagnostic performance of the two imaging modalities were not significant. The sensitivity for periapical radiography was 71% and for DNB radiography 85%, and the specificities 82% and 81% respectively. It is concluded that DNB radiography is a good radiographic examination for periodontal disease, and an acceptable alternative to periapical radiography.

Adult↗

PubMed1993

Comparison of periapical and detailed narrow-beam radiography for diagnosis of periapical bone lesions.

The diagnostic performance of the detailed narrow-beam (DNB) technique of the Scanora multimodal radiography system was compared for periapical radiography for the detection of periapical bone lesions at 262 dental sites in 144 patients. Receiver operating characteristics (ROC) of both imaging modalities were analysed in relation to the ratings of five observers for the whole dentition, three dental regions, and two types of periapical lesions. ROC analysis demonstrated no overall or regional significant differences in the diagnostic performance of the two imaging modalities. The sensitivity for periapical radiography was 72% and for DNB radiography 90%, and the specificities 89% and 88%, respectively. It is concluded that DNB radiography performs as well as periapical radiography for detecting periapical bone lesions.

Adult↗

PubMed1992

Stereographic assessment of mandibular canal in relation to the roots of impacted lower third molar using multiprojection narrow beam radiography.

The position of the mandibular canal in relation to the superimposed roots of 173 impacted lower 3rd molars was evaluated radiologically. A multiprojection narrow beam radiography (MNBR) technique recently developed for oral radiography was applied in this study. This method enables stereoscopic examination of the area of interest. The mandibular canal was located bucally to the roots of 105 (61%) teeth, lingually to the roots of 57 (33%) teeth, and between the roots of 6 (3%) teeth. The relationship of canal to roots of 5 (3%) teeth was not possible to determine. Disagreement between radiological assessment and clinical observation was found in 4 (5%) of 80 operated teeth. The canal was visible at operation in 23 (29%) cases, which was predicted at stereographic examination in 21 (91%) cases. The MNBR stereographic technique is a useful method with high sensitivity (0.83) for evaluating the bucco-lingual relationship of the mandibular canal to the roots of a 3rd molar.

Adult↗

PubMed1991

Multimodal radiography: a new imaging technique and system for oral diagnosis.

The multimodal radiography system is based on the combined use of narrow-beam radiography and spiral tomography in one set of equipment. The essentials of a system are a multifunction unit, preprogrammed imaging procedures for various dentomaxillofacial objects and a co-ordinate system for object location. Four years of clinical experience have shown that multimodal radiography is effective for depicting dentomaxillofacial structures for diagnostic purposes. The detailed narrow beam imaging mode of multimodal radiography has also been compared with intraoral radiography as regards their abilities to reveal periodontal and periapical lesions. Preliminary results indicate that detailed narrow beam radiography is more accurate than intraoral radiography in the diagnosis of periodontal and periapical pathology.

Equipment Design↗

PubMed1983