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At least 1,783 records · Page 99Linked to original sources
PubMed1991

Thielemann's diagonal law of occlusion revisited.

Thielemann's studies of malocclusal relationships and the frequently observed chain reactions created in distant localities led to the formulation of a philosophical approach to occlusion that is also of practical premeditative clinical relevance for the practitioner. Dr. Thielemann presumed to name it a law, and repeated clinical observations apparently support and reinforce his claim. All disciplines of dentistry inevitably encounter and need to know about this aspect of fission-reactive involvement with the common and seemingly innocuous malocclusions. By incorporating the law into the diagnostic, planning, corrective, and therapeutic stages of treatment, the clinician can readily categorize patients for needs assessments and future goals in treatment.

Adult↗
PubMed1990

[Effects of cusp angle on the adaptation of masticatory function].

The purpose of this study was to elucidate the adaptation in masticatory function by changing the cusp angle of the natural dentition of one person using a metal splint. During each experiment mandibular movements and EMG were recorded during a period of weeks. While chewing raisins as test food, mandibular movements as measured by the lower incisal point displacement were detected three-dimensionally using the Selspot system, and electrical activity of the masticatory muscles was picked up for the anterior temporal and masseter muscles, at the right and left using surface electrodes. The time schedule was composed of three terms: (1) before insertion of the splint, (2) for 20 days after insertion of the splint and then for 30 days after removal (Experiment-1), (3) for 14 days after reinsertion of the splint and then for 7 day after removal (Experiment-2). The measurements were done for the following 7 indices: (1) opening phase, (2) closing phase, (3) cycle time, (4) stopping phase (St), which is the period when the mandible was stationary during occlusal contact, (5) duration of EMG activity, (6) duration of EMG silence, (7) the period of EMG silence (IA), which is the period from the end of EMG activity to the end of the stopping phase. The following results were obtained 1) On changing the cusp angle, there was an increase in cycle time, closing phase, opening phase, duration of EMG activity, and duration of EMG silence, but the stopping phase was less than before insertion of the splint. These 6 indices showed a great variation and became irregular at first. 2) The irregularity of the masticatory function disappeared gradually, and then all indices approached the value before insertion of the splint from day 5 or day 20 at the latest. 3) Scarcely any reaction was detected in IA or in the ratio of cycle time and opening phase throughout the measurement period. 4) The indices of the reinsertion period (Experiment 2) approached the value before insertion more rapidly than the period of the insertion (Experiment-1). And the indices after removal quickly approached pre-insertion values. In short, the indices of the time factor of the masticatory function showed that the effect of changing cusp angle was handled as only disturbances. And once the first adaptation was completed, masticatory function responded more quickly to the same stimulus.(ABSTRACT TRUNCATED AT 400 WORDS)

Adaptation, Physiological↗
PubMed1976

Rehabilitating dentulous hemimandibulectomy patients.

A hemimandibulectomy can have many debilitating consequences, such as an eccentric occlusion, a disoriented masticatory cycle, facial disfigurement, distorted speech, and salivation problems. If prosthetic treatment begins some time following surgery and the cicatricial tissue has already consolidated, additional treatment time is necessary. A technique is described which combines crowns with a maxillary prosthesis to guide the mandible into a functional occlusion.

Crowns↗
PubMed1975

[Methods and results of dental and prosthetic care following mandibular hemignathectomy].

By inserting auxiliary prosthetical means (anchored dental replacement with splinting elements) functional failures can be reduced. By using molding surfaces in the one-piece model cast denture the displaced mandibular stump is repositioned and the occlusal relationship between upper and lower teeth reconstructed largely without periodontal damage to the residual dentition.

Dental Occlusion↗
PubMed1992

Sleep apnea prosthesis for dentate patients.

This article describes clinical and laboratory techniques for the fabrication of a sleep apnea prosthesis for a dentate patient. The treatment objective is to posture the mandible at an increased vertical and protrusive position to diminish or eliminate the collapse of the base of tongue into the oropharynx. During fabrication of the prosthesis, cephalograms are used to evaluate spatial change between the base of the tongue and the posterior pharyngeal wall.

Acrylic Resins↗
PubMed1992

Use of the occlusalgraph in patients with parafunctional habits.

Dental patients with parafunctional habits (clenching and grinding of the teeth) may pose unique treatment problems for the dentist. Several patients suffering from such muscle hyperactivity disorders were studied longitudinally by use of the occlusalgraph method to preserve the photocclusal data recorded by each patient. This report suggests that the use of the described technique provides a quick and simple method of visualizing the problem and long-term monitoring of the treatment.

Bruxism↗
PubMed1989

Long-term follow-up after occlusal treatment to correct abnormal temporomandibular joint disk position.

Fifteen patients with temporomandibular joint disk displacement in whom a normal condyle-disk relationship could be established were treated with occlusal changes to maintain the disk in a recaptured position. Occlusal changes were achieved by prosthodontics in 11 patients and by orthodontics in four patients. Follow-up after about 3 years showed that joint function was improved, intensity of pain was reduced, and joint and muscle tenderness were less frequent than before treatment. Intermittent locking, use of analgesics, sleep disturbances, and absence from work because of temporomandibular joint symptoms were also less frequent. Radiographic examination performed in 11 patients at follow-up demonstrated anteroinferior condylar position in the majority of the patients, but only minor hard tissue changes. Arthrography showed the disk to be in a correct position relative to the condyle in 82% (9 of 11) of the patients. These results suggest that permanent change of the occlusion with the objective of eliminating abnormal disk position may be effective treatment for disk displacement when conventional methods of treatment have failed to alleviate the symptoms. The extent of dental treatment needed to maintain the disk in a correct position should, however, be considered relative to the severity of the symptoms.

Adolescent↗
PubMed1992

Arthroscopic disc repositioning and suturing: a preliminary report.

Eight patients (11 joints) underwent arthroscopic disc repositioning and suturing. Disc displacement was established by physical examination, magnetic resonance imaging (MRI), and diagnostic arthroscopy. Postoperative MRIs were taken at varying intervals between 1 day and 6 months. In all 11 joints, either partial improvement or normal disc position was observed arthroscopically. In 9 of the 11 joints, either partial improvement or normal position was observed on the postoperative MRIs. It is concluded that posterior disc repositioning and suturing is an achievable goal of temporomandibular joint arthroscopy.

Arthroscopy↗