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Biomedical subjects

O E Langland

Publications and source records attributed to O E Langland.

At least 19 recordsLinked to original sources
PubMed1995

Early pioneers of oral and maxillofacial radiology.

Because this year (1995) is the 100th anniversary of the discovery of radiography, it is appropriate that we again describe the events surrounding one of the most exciting times in our early dental x-ray history--the discovery of radiography by Roentgen and the application of radiography to the diagnosis and treatment of dental disease. Biographic sketches of some of the more prominent early pioneers in oral and maxillofacial radiology are presented, such as those of Walkhoff, Morton, Kells, Rollins, and Raper, along with a discussion of their contributions to the field.

Germany↗
PubMed1995

Infection control in dental radiology.

Although exposure to blood is rare in oral and maxillofacial radiology, contact with saliva occurs. Thus the spread of infectious diseases is possible through cross-contamination, and specific infection control protocols and unit dosing of items are needed. This article outlines rationale for implementing state-of-the-art infection procedures; and explains federal standards and guidelines with an impact on infection control and occupational safety in dental radiology procedures.

Blood-Borne Pathogens↗
PubMed1995

Risks from dental radiation in 1995.

Risks from dental radiation are primarily to the somatic tissues of exposed persons, although the genetic tissues may receive small amounts of radiation. Maximum permissible doses have been established at various levels depending on the tissue exposed and whether the exposure was occupational or non-occupational: for pregnant workers, the occupational exposure is 1/10 the normal limits. Risks from dental radiation is expressed as the number of extra fatal cancers per million exposed persons, referred to as relative risk. Generally, the relative risk is tenfold greater for the full mouth survey than for a simple panoramic radiograph. Several ways of reducing the risk, to patients as well as healthcare workers, are outlined.

Female↗
PubMed1995

Infection control in dental radiology.

Although exposure to blood is rare in oral and maxillofacial radiology, contact with saliva occurs. Thus the spread of infectious diseases is possible through cross-contamination, and specific infection control protocols and unit dosing of items are needed. This article outlines rationale for implementing state-of-the-art infection control procedures; and explains federal standards and guidelines with an impact on infection control and occupational safety in dental radiology procedures.

Cross Infection↗
PubMed1991

The posterior wall of the maxillary sinus as seen in panoramic radiography.

The dental and sinus projection programs of the PM 2002cc panoramic x-ray unit were compared with regard to the visualization of the maxillary sinus posterior wall of a dried skull. The posterior wall of the maxillary sinus appeared different on each program. In the sinus projection program the posterior wall appeared narrower than that in the dental projection program. The main cause for the difference of the maxillary sinus posterior wall image was the projection angle. In the sinus projection x-rays entered more tangentially to the posterior wall of the sinus than in the dental projection, but in the dental projection x-rays entered more tangentially to the mediosuperior and medioinferior region of the maxillary sinus posterior wall. Thus a large, widely destructive lesion in the posterior wall of the maxillary sinus would be more easily detected with the sinus projection. On the other hand, lesions confined to the mediosuperior and medioinferior regions of the posterior wall will be depicted more clearly with the dental projection program.

Humans↗
PubMed1988

The use of added erbium filtration in intraoral radiography.

Using D and E speed film, intraoral exposures were made of a phantom at 70 and 90 kVp, with and without erbium filtration. Measurement of surface exposures indicates substantial reduction when erbium filtration was used. However, there was a visible loss of contrast. The raters agreed that radiographs made with E speed and D speed film, both with and without erbium filtration, were all of adequate diagnostic quality. The radiographs with the highest contrast were consistently preferred by all of the raters.

Erbium↗
PubMed1987

Interpretation of bitewing radiographs: application of the kappa statistic to determine rater agreements.

The interrater agreement of 34 dentists in determining the presence or absence of caries and the depth of caries in bitewing radiographs was studied. The kappa statistic was used to determine rater agreement, and results indicate that there was substantial agreement on the presence or absence of caries and only fair agreement on the specific depth of caries. Because of the degree of disagreement in determination of the extent of caries among examiners, it is recommended that this fact be taken into account in relation to the findings on bitewing radiographs, particularly when there may be differences of opinion between parties.

Dental Caries↗
PubMed1987

The evaluation of high-speed screen/film combinations in cephalometric radiography.

Cephalometric radiographs of a tissue equivalent plastic encased dry skull, each made with eight different screen/film combinations, were compared for usefulness in making orthodontic analyses. The eight screen/film combinations chosen ranged in relative speed from 80 to 600. Only one grid cassette was used, and it was a Par speed screen/film combination. Ten orthodontists identified 13 selected anatomic landmarks and rated the adequacy of their radiographic images. The density of each cephalometric radiograph was analyzed for each anatomic landmark. The results showed a difference in density readings for the various landmarks visualized. The optical density preferences of the 13 anatomic landmarks ranged between 0.87 and 2.09. The study leads to the conclusion that cephalometric radiographs can be taken with screen/film combinations that provide maximum useful information with a minimum dose level to the patient.

Calcium Compounds↗
PubMed1986

Diagnostic quality versus patient exposure with five panoramic screen-film combinations.

Five film-screen combinations were used to make five density-matched panoramic radiographs of a tissue-equivalent phantom skull using the Midwest/Morita Panoral x-ray machine. The radiographs were evaluated as to their diagnostic quality by twenty dental radiologists. The results demonstrate that proper screen-film selection can significantly reduce patient exposure without compromising diagnostic quality.

Humans↗
PubMed1980

Panoramic radiographic survey of dentists participating in ADA health screening programs: 1976, 1977, and 1978.

Results of the panoramic examination of dentists participating in the health evaluation program of the ADA annual sessions held at Las Vegas (1976), Miami Beach (1977), and Anaheim (1978) were reported and compared as accurately as possible with the results of the panoramic examinations of dentists taking part in the health evaluation programs of the ADA annual sessions in 1964, 1966, and 1968. The panoramic radiograph continues to serve as a diagnostic aid in dental health evaluation programs. Only general impressions may be drawn from surveys of this nature for various reasons: the inability to follow up each case with a clinical examination; the lack of correlation of findings between examiners; and the use of different criteria each year. Generally, dentists examined in the health evaluation programs in 1976, 1977, and 1978 were in good dental health.

Adult↗
PubMed1972

C. Edmund Kells.

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History, 19th Century↗