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Biomedical subjects

C G Petrikowski

Publications and source records attributed to C G Petrikowski.

15 recordsLinked to original sources
PubMed2000

Erdheim-Chester disease of the jaws: literature review and case report.

Erdheim-Chester disease is a rare systemic lipogranulomatous disorder of adults that shares some histopathologic features similar to Langerhans' cell histiocytosis and that results in characteristic radiographic changes in the long bones. Relatively few cases have been reported in the jaws. We present a literature review of jaw cases and the first case report to describe detailed radiographic and pathologic features of jaw involvement, as well as clinical, radiographic, and histopathologic follow-up of the untreated jaw lesions.

Adult↗
PubMed1999

Optimum dental radiography in bone marrow transplant patients.

OBJECTIVE: The purpose of this study was to establish an optimum radiographic examination regimen for patients undergoing bone marrow transplantation. Two radiographic examinations were compared: the panoramic radiograph and the full mouth series of radiographs. STUDY DESIGN: A prospective analysis of 65 consecutive patients undergoing bone marrow transplantation was undertaken. All patients were examined through use of both panoramic and full mouth series intraoral radiographs, including bitewings. Significant findings were recorded and compared by means of paired t test analysis for parametric data, such as caries, periapical inflammation and subgingival calculus, and by means of McNemar's test for nonparametric data, such as the presence or absence of severe periodontal disease. RESULTS: Acquired findings, such as caries, periodontal disease, and clinically significant faulty restorations, were detected more frequently from the full mouth series (P < .05). There was no significant difference in the detection of periapical pathosis. In 8 of 65 patients, clinically significant information, such as evidence of impacted wisdom teeth, neoplasms, and multiple myeloma, was better detected from the panoramic radiographs. CONCLUSIONS: The results suggest a combination of both modalities as the optimum means of radiologic survey in this "high-risk" patient population.

Adolescent↗
PubMed1999

Age and gender differences in temporomandibular joint radiographic findings before orthodontic treatment in adolescents.

OBJECTIVE: The purpose of this study was to determine whether there is a relationship between abnormal temporomandibular joint radiographic findings and age or gender in a sample of young preorthodontic patients. STUDY DESIGN: A total of 491 consecutive patients, aged 9 to 15 years, were referred for orthodontic records. Routine preorthodontic radiographs, including corrected sagittal tomographs, were taken for each patient and viewed by an observer blinded to clinical records. Temporomandibular joint radiographic findings were classified as normal or abnormal. For comparative purposes, the study population was divided into 2 age groups (9-11 years and 12-15 years). RESULTS: Frequency of abnormal findings ranged from 2.4% to 11.5% and was similar for both sides. Temporal component abnormalities correlated with abnormalities of condylar position, joint space, and condylar osseous morphology. The frequency of osseous abnormalities was higher in girls and highest in older girls. CONCLUSIONS: There are significant differences between genders for some temporomandibular joint radiographic abnormalities, and in our study sample the frequency of abnormalities was highest in 12-to-15-year-old girls.

Adolescent↗
PubMed1998

Interobserver variability in pediatric radiographic quality assessment.

Programs to monitor radiographic quality have been established in several Canadian provinces. These quality assurance programs depend in part on the evaluation of technical radiographic errors. Interobserver variability in the assessment of these errors reduces the reliability of such information. This study examined the interobserver variability of three dental specialists involved in documenting radiographic technical errors, and the need for retakes following the initial radiographic surveys of 200 children. Observers were trained and calibrated to standardize the evaluation of errors. The overall frequency at which errors were found in bitewing radiographs was consistent with the results of previous studies, but the number of periapical and panoramic technical errors was low. Interobserver variability occurred in the recording of radiographic technical errors, primarily in the recording of bitewing errors. There was also interobserver variability in the ordering of retakes. The interobserver variability in the assessment of radiographic quality could not be eliminated, despite prior observer training. This could indicate that the decision to retake a radiograph may be based on subjective criteria, especially in the absence of clinical information.

Adolescent↗
PubMed1997

Longitudinal radiographic assessment of dense bone islands of the jaws.

OBJECTIVES: This study assessed dense bone island (DBI) inception and growth in jaws. STUDY DESIGN: A population of 2991 patients (age range 5 to 35 years) was studied with at least two panoramic radiographs taken 1 to 10 years apart for each patient. Lesions were digitized and measured with computer measuring software. The size of the earliest DBI was compared with subsequent DBI measurements after the latter measurement was normalized with reference to the size of the nearest tooth. RESULTS: Sixty-nine patients with DBIs were identified. A total of 3.1% of the patients with DBI were found in the 5- to 10-year age range, with the first patient in the DBI group found at 9.4 years. A significantly higher proportion (p = 0.002) of the unaffected patients (26%) was found in the same 5-to 10-year age range. The proportions of patients in the DBI and unaffected groups in older age ranges were similar. Assessment of DBI size changes showed that 43% of the 53 DBIs detected between 9.4 and 19 years enlarged (mean change, 212%), and 17% diminished (mean change, 49%). In comparison, 29.4% of 17 DBIs detected between 20 and 35 years enlarged (mean change, 153%), and 5.9% diminished (mean change, 60%). CONCLUSION: Our results indicate that DBIs are labile lesions, develop during early adolescence, and retain a potential for enlargement, or to a lesser extent shrinkage, into adulthood.

Adolescent↗
PubMed1996

Radiographic features of segmental odontomaxillary dysplasia: a study of 12 cases.

The purpose of the study was to analyze the radiographic features of segmental odontomaxillary dysplasia by studying the radiographs of 12 new cases. With a standard data collection form, the radiographic characteristics were assessed by the two principal investigators who studied available radiographs of all cases. As in previously reported cases, abnormal findings in all patients were confined to the posterior segment of one maxilla. The most common findings in the cases studied were sclerosis and thickening of bony trabeculae, missing permanent premolar teeth, abnormal spacing of primary molars vertical orientation of bony trabeculae, a smaller maxillary sinus, and delayed eruption of permanent posterior teeth. Less commonly observed features were enlarged crowns, roots, and pulps of primary molars, irregular resorption of primary molar roots, mediolateral expansion of the alveolar process, splayed roots of primary molars, and an abnormal medial position of the teeth.

Adolescent↗
PubMed1996

Temporomandibular joint radiographic findings in adolescents.

Radiographic findings in temporomandibular joints (TMJ) of asymptomatic adolescents have been reported, probably because such patients are unlikely to undergo routine TMJ radiography. The purpose of this prospective study was to document radiographic findings in TMJ's of adolescents without a history of TMJ dysfunction to determine prevalence of osseous, positional and functional abnormalities. Corrected sagittal TMJ tomographs in closed and open positions from pre-orthodontic records of 498 adolescent patients aged 8 to 15 years old were studied by one observer. Positional, functional or osseous abnormalities were each found in less than 10% of TMJ's. One percent of joints demonstrated marked limited mobility. There was no significant difference between right and left sides. Our results suggest that routine radiography of TMJ's in adolescents is not a useful screening too although longitudinal studies are necessary to determine whether asymptomatic adolescent patients with radiographic abnormalities will develop signs and symptoms of TMJ dysfunction.

Adolescent↗
PubMed1996

Quantitative radiographic changes in the mandible, femur and vertebra in lactating rats fed a low-calcium diet.

OBJECTIVE: To determine whether similar changes occur in the mandible, femur and vertebral body in generalized osteopenia. METHODS: Osteopenia was induced in the bred animal group using a low calcium diet from parturition onwards. Control groups were virgin and bred rats fed a normal diet. Rats in each group were weighed weekly, and subgroups of 12 rats in each treatment group were killed at ages 18, 24, 36 and 48 weeks. A separate reference group of 12 rats was killed at age 12 weeks, i.e. day 0 of the comparative study. The mandibles, both femurs and the first lumbar vertebrae of all rats were removed post-mortem and radiographs made for each individual bone; measurements of cortical thickness and bone widths were made from these radiographs using a computer-based video image analysis system. RESULTS: Significant differences among treatment groups were detected for each bone type; changes were sustained over the 48-week study period for the femur and vertebrae but were transient, except for alveolar bone height, in the mandible. Significant differences were found for cortical thicknesses and bone widths in the mandible, femur and vertebrae, based on the duration of the low-calcium diet. Although significant differences in the thickness of some cortices were found in the mandible, dimensional changes were small. CONCLUSIONS: Mandibular cortical width is an unreliable indicator of osteopenia in this rat model.

Analysis of Variance↗
PubMed1996

Interobserver variability in radiographic interpretation of pediatric dental diseases: a pilot study.

Interobserver variability in radiographic interpretation of dental disease may be a result of clinical bias, education, training, experience or other factors, and may potentially lead to misdiagnosis of disease. Few studies have investigated variability related to dental specialty. The purpose of this pilot study was to determine interob-server variability in radiographic interpretation of pediatric dental diseases using a small number of observers, consisting of a pedodontist, an orthodontist and an oral radiologist. These specialists interpreted initial radiographic surveys of 200 pediatric patients (4.5 to 15.5 years old). The results showed no differences in interpretations of radiographic signs of dental abnormalities except for caries, abnormal primary root resorption due to the eruptive path of a permanent tooth and presence of a congenital/developmental tooth abnormality. These findings will be used to design future studies which will include a larger number of observers from different dental specialties.

Adolescent↗
PubMed1995

Radiographic differentiation of osteogenic sarcoma, osteomyelitis, and fibrous dysplasia of the jaws.

UNLABELLED: Biopsy and histopathologic analysis may fail to consistently separate osteogenic sarcoma, osteomyelitis, and fibrous dysplasia. OBJECTIVES: To establish useful radiographic characteristics to differentiate these diseases, an objective preliminary study of radiographs of 30 cases of these diseases was done. STUDY DESIGN: After precisely defining several radiographic characteristics and completing a calibration study, three observers unaware of the diagnosis examined study cases that were randomly ordered. RESULTS: Despite using trained observers and strict criteria, differentiation of the three conditions is difficult on the basis of radiographic features alone. In osteogenic sarcoma, the distinguishing features were: permeative lesion borders, stippled bone pattern, destruction of cortical outlines, perpendicular spiculations of periosteal new bone, destruction of lamina dura, and widening of the entire periodontal ligament space. Presence of sequestra and laminations of periosteal new bone were the most useful distinguishing features in cases of osteomyelitis that otherwise resemble fibrous dysplasia. In fibrous dysplasia, superior displacement of the mandibular canal and a fingerprint bone pattern were pathognomonic. Displacement of the maxillary sinus cortex, alteration of lamina dura to the abnormal bone pattern, and narrowing of the periodontal ligament space were also useful distinguishing features. CONCLUSIONS: Our findings indicate that diagnosis cannot rely on radiographic characteristics alone, although some radiographic findings were more useful than others.

Diagnosis, Differential↗
PubMed1992

The role of dental radiography in endosseous implant treatment.

The role of dental radiography in pre- and post-surgical implant assessment was described. The use of both conventional and advanced radiographic techniques in conjuncture with clinical information provides the most comprehensive data for pre- and post-surgical assessment.

Dental Implantation, Endosseous↗
PubMed1989

Presurgical radiographic assessment for implants.

A radiographic technique was developed to accurately assess bone available for the placement of intraosseous implants. Hypocycloidal tomographs were made at right angles to the long axis of the mandibular and/or maxillary alveolus while the patient was wearing a specially designed splint. Alveolar height and width measurements were obtained from the resulting films. Sensitivity results for this technique showed that the mean difference between the actual bone height and width and that measured in the radiographs was 0.49 mm and 0.35 mm, respectively. A paired difference test revealed a range of 0.25 mm to 0.73 mm in the expected error in the height and 0.20 mm to 0.50 mm in width measurements with a 95 confidence interval.

Alveolar Process↗