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Biomedical subjects

F J Regennitter

Publications and source records attributed to F J Regennitter.

16 recordsLinked to original sources
PubMed2001

Predictable multiple site root coverage using an acellular dermal matrix allograft.

BACKGROUND: The primary aim of this randomized, controlled, blinded clinical investigation was to determine if orientation of an acellular dermal matrix (ADM) allograft, basement membrane side against the tooth or connective tissue side against the tooth, affected the percent root coverage. Additional aims were to: 1) compare results of this study with results obtained from other root coverage studies; 2) determine if multiple additional sites could be successfully covered with the same surgery; 3) determine the effect of the procedure on keratinized tissue; and 4) evaluate the amount of creeping attachment obtained. METHODS: Ten patients with 2 Miller Class I or II buccal recession defects > or =3 mm were treated with a coronally positioned flap plus ADM and followed for 12 months. Test sites received ADM with the basement membrane side against the root (AB), while the control sites received the connective tissue side against the root (AC). Multiple additional recession sites were treated with the same flap procedure. RESULTS: Mean baseline recession for the AB sites was 4.2 mm and for the AC sites, 3.7 mm. Mean root coverage of 95% was obtained for both AB and AC sites. Sixty-eight additional Class I or II AB and AC sites obtained about 93% root coverage. The mean increase in keratinized tissue for both treatments was 0.80 mm. No additional root coverage was gained due to creeping attachment between 2 and 12 months. CONCLUSIONS: Treatment with ADM was an effective and predictable procedure for root coverage. The orientation of the material did not affect the treatment outcome for any of the parameters tested.

Adult↗
PubMed2000

Diagnostic accuracy of film-based, TIFF, and wavelet compressed digital temporomandibular joint images.

The purpose of this research was to determine if digitization and the application of various compression routines to digital images of temporomandibular joint (TMJ) radiographs would diminish observer accuracy in the detection of specific osseous characteristics associated with TMJ degenerative joint disease (DJD). Nine observers viewed 6 cropped hard-copy radiographic films each of 34 TMJs (17 radiographic series). Regions of interest measuring 2 in x 2 in were digitized using an 8-bit scanner with transparency adapter at 300 dpi. The images were placed into a montage of 6 images and stored as tagged image file format (TIFF), compressed at 4 levels (25:1, 50:1, 75:1, and 100:1) using a wavelet algorithm, and displayed to the observers on a computer monitor. Their observations regarding condylar faceting, sclerosis, osteophyte formation, erosion, and abnormal shape were analyzed using ROC. Kappa values were determined for relative condylar size and condylar position within the glenoid fossa. Indices were compared using ANOVA at a significance level of P < .05. Although significant and substantial observer variability was demonstrated, there were no statistically significant differences between image modalities, except for condylar position, in which TIFF and wavelet (at all compression ratios) performed better than the original image. For faceting, wavelet 100:1 performed better than radiographic film images. Little actual image file reduction was achieved at compression ratios above 25:1.

Analysis of Variance↗
PubMed1997

Esthetic preference of the frontal and profile views of the same smile.

This study has shown that orthodontists and their patients share a common pool of diffuse esthetic values of the same smile. Profile and frontal views of the same smile were not similarly rated for esthetic pleasantness: the profile views were rated higher than the frontal views of the same smile. This finding suggests that orthodontists should consider both frontal and lateral views during evaluation of their patient when planning and assessing orthodontic treatment. More research is needed to determine the generalizability of the finding that orthodontists and patients have similar facial esthetic preferences. Future studies should expand the range of smiles that are evaluated by including both genders, people of different ethnic backgrounds, and people of a variety of ages. Research is also needed to evaluate facial esthetics and smiles in dynamic motion.

Adolescent↗
PubMed1996

Searching the internet.

Your first experiences using the Internet search and retrieval programs will be profitable if you understand the environment within which they were designed to work. When used properly, they represent the Internet's directory assistance that will aid you in information discovery.

Computer Communication Networks↗
PubMed1996

Survey of smokeless tobacco use in basic trainees and armor basic course officers.

In this study an all-male population of 256 U.S. Army basic trainees and 98 armor officer basic course students were surveyed concerning extent of use, knowledge of, and factors contributing to the use of smokeless tobacco (ST). The survey was administered at a dental clinic at Fort Knox, Kentucky. The data were analyzed using the SPSS computer software program. Results showed that more than 17% of this population were either occasional or regular users of ST. Nearly 24% had tried ST and more than 9% were former users. Exactly one-half had not tried ST. A typical user was white, had started ST use at age 14, had used it for 4 years, and was most likely to use snuff or dip. Higher educational level achieved was associated with increased likelihood of ST use. Nearly 22% of college graduates used ST, whereas only 15.3% of high school graduates or those with some college were users. Knowledge about the potential health effects of ST was generally high or moderately high, except for its ability to cause hypertension. This was true for both high school and college graduates, although college graduates were somewhat more informed. Few in this population had a personal attitude of approval toward ST use, and very few perceived that either their parents or their superiors in the military approved of ST use. Perceived attitude of approval was highest from friends and peers. The principle reasons for starting ST use were use by friends and curiosity about taste and effects. Influence from public figures, such as athletes, and from advertising was minimal. Enjoyment of flavor and taste was found to be the main reason for continued ST use. Health professionals were identified by the majority of respondents as the single most important information source on ST. Relatively few (27%), however, stated that their dentist or hygienist had ever discussed ST with them.

Adolescent↗
PubMed1995

Soft tissue profile: a survey of African-American preference.

Soft tissue profile is a critical area of interest in the development of an orthodontic treatment plan. This study was designed to elicit the current soft tissue profile preference of African-American respondents. Results indicate that: (1) African-American male and female subjects prefer relatively flat profiles, with varied fullness of the lips. (2) African-American male and female subjects prefer the male subjects to have more protrusive profiles than the female subjects. (3) Respondents do not always correctly select their own profile type. (4) More than a third of the respondents desire a change in their own profile.

Adolescent↗
PubMed1995

Longitudinal predictability of AF-BF value in Angle Class I patients.

AF-BF is a linear cephalometric measure of the anteroposterior jaw relationship in the sagittal plane. A retrospective, longitudinal study was made to determine the mean Caucasian American AF-BF values at ages 8 and 18 years for 30 male and 32 female participants of the Bolton Growth Study. Mean AF-BF values (+/- s.d.) for males were 7.3 +/- 2.7 mm at 8 years and 6.5 +/- 4.2 mm at 18 years. Mean AF-BF values (+/- s.d.) for females were 6.7 +/- 2.1 mm at 8 years and 5.2 +/- 2.9 mm at 18 years. No significant difference was found between the mean AF-BF values for males and females at either age group (P < 0.05). The decrease in AF-BF mean values with increasing age both for males and females was statistically significant. The correlation (r) for the AF-BF values was 0.49 (P < 0.05) for females and 0.86 (P < 0.05) for males. With increasing age, the mean difference between ANB values for females was 1.40 +/- 1.60 and 1.10 +/- 1.40 for males. The correlation of ANB angle and AF-BF provides a clinically useful tool for the cephalometric assessment of anteroposterior sagittal discrepancies of maxillary and mandibular denture bases.

Adolescent↗
PubMed1993

The role of the headgear calendar in headgear compliance.

This study was undertaken to determine the role of the headgear calendar and its relationship to headgear compliance. Headgear timers were used covertly to monitor actual headgear wear of 28 patients for three consecutive orthodontic appointments. Fourteen patients were asked to monitor their daily headgear wear by using a headgear calendar. The other 14 did not use a calendar. The results show that patients who monitor their headgear wear with a headgear calendar are more compliant than those patients who do not (7.9 hours compared with 5.3 hours). All age groups in this study wore their headgear more when a headgear calendar was used with the exception of the > 16-year-old group. There is a high degree of correlation (r2 = 0.60) between the number of hours recorded on the calendar compared with the number of hours actually worn. There was a poor correlation (r2 = 0.02) between the number of hours the patient said he wore his headgear compared with the actual number of hours worn.

Adolescent↗
PubMed1993

Clinical versus quantitative assessment of headgear compliance.

This study was undertaken to determine if clinicians could accurately evaluate headgear compliance. Headgear timers were used covertly to quantitatively assess the headgear compliance of 28 patients over 3 consecutive months. Investigators subjectively evaluated the patients to determine how many hours per day they felt the patient had been wearing the headgear. Investigators were divided into three groups: (1) 5 orthodontists (2 board certified, 3 board eligible--total of 50 years of orthodontic experience); (2) 10 residents; and (3) 11 assistants. At least two investigators from each group evaluated the same person for all three appointments. The average error values were 2.86 hours, 3.27 hours, and 3.61 hours, respectively, for the three groups. The standard deviations were also very large, indicating that no group could accurately or consistently assess headgear wear. In this study no difference was found in compliance between sexes. Patients 10 to 12 years of age were more compliant than those 12 to 14 years of age, which were more compliant than the > 16 age group. The least compliant was the 14 to 16 year age group.

Adolescent↗
PubMedDate not supplied

The circumferential supracrestal fiberotomy.

This article addresses the advantages and shortcomings of circumferential supracrestal fiberotomy procedures from the pragmatic perspective of practicing clinicians. The first part of this article reviews the anatomy, surgical techniques, and timing of the procedure. The significance of individual techniques and studies are discussed.

Animals↗