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Biomedical subjects

J D Zwemer

Publications and source records attributed to J D Zwemer.

At least 19 recordsLinked to original sources
PubMed1995

Treating ankylosed primary teeth in adult patients: a case report.

When ankylosed primary teeth are retained beyond the mixed-dentition stage and the involved teeth are below the occlusal plane, occlusal and interproximal contacts can be restored to esthetic and functional anatomic contours. With the development of new, improved posterior composite resins that have greater wear resistance and stronger adhesive bonding systems for enamel and dentin, new opportunities for conservative, simple, and efficient esthetic and functional restorations are possible in selected retained ankylosed primary molars.

Acrylates↗
PubMed1994

Survey of dental implant practice.

Research advances in oral implantology have led to the development of several implant systems and to an increasing utilization of oral implants by dental practitioners. The purpose of this study was to conduct a survey of dental practitioners using implants in their practices, in order to determine their educational qualifications, to profile their practice in implants, and to evaluate the outcomes of implant therapy. The typical general practitioner in this study received dental implant training mainly from continuing education courses sponsored by a dentist experienced in implantology, spent 12 months or more in receiving formal instruction/training in implant dentistry, practiced state-of-the-art dental implantology, provided both surgical and restorative phases, used an endosseous implant system most of the time, and presented 5- and 10-year success rates of more than 90% for dental implant therapy. No clinically significant correlations were found between the 5- and 10-year success rates and the nature of the dental implant training, the amount of time spent for instruction and training in implant dentistry, or the type of dental implant system used.

Adult↗
PubMed1993

A comparison of electromyographic activity between anterior repositioning splint therapy and a centric relation splint.

The purpose of this study was to compare the electromyographic activity of masticatory muscles (temporal and masseter) with the use of an anterior repositioning splint and a centric relation superior repositioning splint. Twenty-six consecutive patients, who referred with the chief complaint of temporomandibular pain and/or headache were selected from one of the author's practices. All these subjects were diagnosed as having internal derangement of the temporomandibular joint. Ten normal subjects were used as controls. Surface electromyographic recordings were taken of each subject prior to the beginning of clinical therapy for the patients. The results show significantly less masseter and temporal muscle activity with anterior repositioning splint therapy compared to the centric relation superior repositioning splint therapy.

Adolescent↗
PubMed1992

The practice of complete denture prosthodontics by selected dental graduates.

Graduates of a dental school in the southeastern United States were surveyed for the procedures they used in practicing complete denture prosthodontics. Of the 530 graduates representing 15 graduating classes, 80% returned the questionnaires. Most respondents (94.8%) made complete dentures, but only 3.5% devoted more than 20% of their practice time to this phase of prosthodontics. In practice, the average graduate performed approximately one half of the techniques that had been judged academically to be clinically essential. Compliance decreased proportionately with the number of years in practice. Factors affecting compliance include the influence of peer practitioners and continuing education courses. The content of the predoctoral curriculum needs to be reviewed for its relevancy to continuing education and to dental practice.

Centric Relation↗
PubMed1990

Swallowing patterns in human subjects with and without temporomandibular dysfunction.

Recent clinical impressions have suggested that tongue-thrust swallowing may often occur in patients with internal derangement of the temporomandibular joint(s) and may represent an unconscious effort to avoid temporomandibular joint (TMJ) dysfunction by minimizing noxious stimuli from the joints. The purpose of this study, therefore, was to determine the swallowing patterns in human subjects with and without TMJ dysfunction. The swallowing patterns of 25 adult orthodontic patients already known to have TMJ dysfunction and 25 adult control subjects without such dysfunction were examined with the aid of kinesiographic and electromyographic recordings taken while the subjects were sipping water. Analysis of the data revealed that 19 patients with TMJ dysfunction used a tongue-thrust open-jaw swallowing pattern, while only nine control subjects used such a swallowing pattern. Furthermore, six of the patients with TMJ dysfunction had an anterior open bite, while none of the control subjects had an anterior open bite. The results suggest that patients with aberrant swallowing patterns should be examined for temporomandibular joint dysfunction.

Adolescent↗
PubMed1990

Occurrence of temporomandibular disorder symptoms in healthy young adults with and without evidence of bruxism.

Few studies have specifically examined the association between bruxism and symptoms of temporomandibular disorders in adults. In this study 569 freshmen dental students entering the Medical College of Georgia over a 10-year period completed an 18-item "yes/no" questionnaire relating to awareness of tooth clamping/clenching/grinding and signs and symptoms of oral, facial, and craniomandibular discomfort, pain, and disorders. A higher proportion of females than males reported that they were aware of clamping and clenching their teeth, as well as symptoms of stiff jaw, sore jaw or teeth, cracking or locking jaw joint, and headaches in the morning. Reported awareness of tooth clamping and clenching and of someone having heard tooth grinding was significantly associated with reported pain, discomfort, or other sensations in, in front of, or behind the ear in the overall subject group.

Adult↗
PubMed1990

Community water fluoride levels, preschool dietary patterns, and the occurrence of fluoride enamel opacities.

Three hundred seventy-four 12- to 14-year-old children were examined to determine modified tooth surface index of fluorosis (TSIF) scores, and to assess the association among fluoride enamel opacities and water fluoride levels, preschool dietary patterns, and dentifrice consumption. The subjects included boys and girls of both black and white races who reported life-long residence in either Augusta or adjoining Richmond County. "City" children had communal water consistently fluoridated at levels of 0.9 to 1.2 ppm. "County" children had water variably fluoridated at levels of 0.2 to 0.9 ppm. TSIF scores were recorded on each included tooth and the highest TSIF tooth score was noted for each subject. The frequency of TSIF scores in all subjects was analyzed for dental arch symmetry and for association with city/county residence. The frequency of TSIF scores then was analyzed separately for "city" children and "county" children for an association with race, gender, preschool dietary habits, and dentifrice ingestion. Chi-square analysis revealed that higher TSIF scores were associated with city children significantly more than with county children. There was no association of TSIF scores either in the city children or the county children with respect to gender, race, preschool dietary patterns, or dentifrice ingestion. TSIF scores were bilaterally symmetrical, but were higher in the maxillary arch than in the mandibular arch.

Adolescent↗
PubMed1989

Oral trauma. Emergency care of lacerations, fractures, and burns.

Emergency physicians are usually the first to see patients with injuries to oral and facial tissues. Because many of these patients may have life-threatening neurologic injuries, secondary oral and perioral problems may be overlooked initially. These injuries, however, have a profound potential for causing lifelong disability and disfigurement and should be addressed as soon as the patient's condition stabilizes. It is essential to diagnose and manage these problems effectively in the emergency setting and then to make prompt direct referral to an appropriate specialist when the patient's condition permits.

Burns, Electric↗