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At least 145 records · Page 8Linked to original sources
PubMed2003

[Non-osteogenic malocclusion after anatomic reduction and miniplate rigid fixation in condylar neck and subcondylar fractures].

OBJECTIVE: To analysis the cause of malocclusion that was found in patients suffering from condylar neck and subcondylar fractures after perfectly anatomic reduction and rigid fixation. METHODS: There were 23 cases of malocclusion in the patients of condylar neck and subcondylar fractures after anatomic reduction and rigid fixation during 1994 to 2001. The possible reasons were studied, and the treatment methods were proposed. RESULTS: Both distortion and(or) fracture of miniplates and displacement anain of the condylar process after operation were not found in all 23 cases. There were 6 cases of open bite at the molar teeth of the fractured side, while the normal occlusions were showed in the nonfractured side. 11 cases showed that the whole mandibles were moved slightly to the nonfractured side. 4 cases showed that the mandible of fractured side moved slightly to the nonfractured side and the occlusion of nonfractured side were normal. 2 cases showed premature contact at the fractured molar teeth and the anterior teeth showed open bite. There were 5 cases of facial nerve damages, 2 cases wound infection, 2 cases TMJ chronic pain and 1 cases TMJ click and(or) murmur. CONCLUSIONS: Although the anatomical reduction and miniplate rigid fixation were operated on the condylar neck and subcondylar fractures, there were probably having the chance of showing malocclusion. The malocclusion was not caused by the fracture itself, but in the TMJ and/or muscular injury. Therefore, the malocclusion can be cured with intermaxillary elastic traction and functional exercise. Sometimes, the occlusal adjustment may be performed to resume the normal occlusion. In any case, operation is not needed.

Adult↗
PubMed2003

Attitudes and satisfaction with dental appearance in young adults with and without malocclusion.

The aim of the study was to assess the quality of a Public Dental Service (PDS) system in Sweden with regard to the orthodontic care and to investigate the selection made for the consultation by the general practitioners (GPs) and by orthodontists of those patients with malocclusion. In the individuals leaving the PDS system, the residual need and demand for treatment due to malocclusions and satisfaction with and opinion of their teeth was assessed in orthodontically treated and untreated 19-year-olds. Altogether 121 19-year-olds were clinically investigated with respect to six defined malocclusion traits and given a questionnaire. The following results were found: Ten per cent of the 19-year-olds that had not had an orthodontic consultation showed a residual treatment need. One third of the individuals judged by the orthodontist not to need treatment and one third that had been treated by the GP showed a marked orthodontic treatment need at the age of 19 years. Twenty-two per cent of all 19-year-olds left the PDS with an orthodontic treatment need. Ninety-four per cent were satisfied with their teeth irrespective of malocclusion or not. Every second individual considered their teeth important for their self-esteem. It was concluded that 19-year-olds in general were satisfied with their dental appearance. Half of the registered residual need and demand for orthodontic treatment was not related to measurable malocclusions.

Adult↗
PubMed2004

[Stability of molar relationship after orthodontic treatment in Class II division 1 malocclusions treated by extraction].

OBJECTIVE: To investigate the changes of occlusal relationship in posterior teeth among the pre-treatment, post-treatment, and to analyze some possible factors which may relate to the relapse of posterior occlusal relationship. METHODS: 29 finishing Class II division 1 cases treated by extraction with full records selected were included. The sample consists of 12 males, 17 females. The follow-up lateral head films and study casts were taken at least 2 years after orthodontic treatment. The cephalograms were measured by computerized program and the study casts measured by caliper. RESULTS: Improvements of molar relationship were shown during treatment and a little bit changes during follow-up. During the treatment, the amount of mesial movement of the lower molars was more than the upper molars in dental Class II malocclusion and the amount was similar between upper and lower molars in skeletal Class II malocclusion although the ANB angle decreased significantly. During the follow-up stage, the movement tendency between upper and lower molars was reversed. The sagittal growth pattern of mandible and irregularity of upper incisors were nearly correlated with the relapse of molar relationship. CONCLUSION: The stability of molar relationship is acceptable during the follow-up stage in Class II malocclusion. The improvement of molar relationship depends on the difference of mesial movements between upper and lower molars in dental Class II malocclusion. However, in skeletal Class II malocclusion the improvement of jaw relationship does the effect. The positive growth of mandible and crowding of upper incisors may affect the relapse of molar relationship.

Cephalometry↗
PubMed2005

[Prevalence of rhino-pharyngeal disease in the presence of malocclusion in school children in the village of Abidjan].

An epidemiological survey of randomly selected school children led to Abidjan in three public schools made it possible to determine the prevalence of the rhinopharyngeal diseases in presence of malocclusions. It is an exploratory study jointly undertaken by two teams of specialists in ORL and Orthodontics within a sample of African schoolchildren old of 5 to 21 years. The results showed the presence of malocclusions in 73.30% of the cases (N = 220). The rhinopharyngeal diseases account for 38.3% (N = 115). At the subjects carrying a malocclusion the rhinopharyngeal diseases are 48.30% and they are dominated by the allergic chronic rhinitis (40%) followed obstructive hypertrophic tonsillitis (16.5%). However, these states which cause certainly a nasal obstruction involving an oral breathing do not cause inevitably malocclusion. We cannot thus affirm unambiguous a bond between malocclusions and rhinopharyngeal diseases (p > 0.05). They are nevertheless as many indications to question the patient on other symptoms and to refer to an ORL specialist. Our investigation being limited to the occlusal study, it seems essential to us to continue these analyses to detect the possible predisposition of certain patients to develop dento-skeletal anomalies in the presence of rhinopharyngic diseases.

Adolescent↗
PubMedDate not supplied

[Prevalence of normal occlusion and malocclusion in Bauru (Sao Paulo) students. 2. Influence of socioeconomic level].

We have evaluated 2,416 children of both sexes from Bauru, with mixed dentition, at the age between 7 and 11 years, enrolled in 18 public and private schools. The data regarding their occlusal conditions were written down in index cards previously elaborated to make possible the percentual calculation and the illustrative graphics. In this article we propose to find out the percentage of normal occlusion and distribution of malocclusions, according to the anteroposterior relationship between the dental archs (following the ANGLE3 classification) and their social-economical status. The results show a low percentual of normal occlusion, in total of 11.47% from the studied population. Class I malocclusion was the most prevalent (55%), followed by class II (42%) and, finally, by class III (3%). The social-economical condition had an influence upon the percentual of normal occlusion and class I malocclusion. In a lower social-economical level there was an increase in the percentual of class I malocclusion to the detriment of the reduction of normal occlusion. Class II and III malocclusions were not influenced by the social-economical status.

Brazil↗
PubMedDate not supplied

Relationship between malocclusion and bruxism in children and adolescents: a review.

A review of the literature on the relationship between malocclusion and bruxism is presented. Statistically significant correlations were found between different types of morphologic malocclusion such as Class II and III molar relationship, deep bite, overjet, and dental wear or grinding. The types of functional malocclusion correlated with dental wear or bruxofacets were mediotrusion interferences, anterior-posterior and vertical distance between retruded position and intercuspal position, lateral shift of the mandible together with nonfunctional side interferences. However, all studies that reported significant correlations were cross-sectional, which implies that the relationship between malocclusion and bruxism was investigated at a certain point of time. The results were not confirmed by the two longitudinal studies. Besides, the correlations were found in different age groups. Finally, the reported correlations cannot have biological significance since the biological plausibility of the causal hypothesis cannot be inferred. On the basis of this study, malocclusion does not increase the probability of bruxism, and therefore early treatment of occlusal conditions to prevent bruxism is not scientifically justified.

Adolescent↗
PubMed1993

Association between malocclusion and temporomandibular disorders in orthodontic patients before treatment.

The association between malocclusion and the prevalence of temporomandibular disorders (TMD) was studied in an orthodontic patient population before orthodontic treatment was started. A total of 305 patients, 232 with general malocclusion and 73 who also had cleft lip or palate, were given a questionnaire about the subjective symptoms of TMD. Clinical examinations for type of malocclusion and TMD signs were also conducted. No significant differences in the prevalence of TMD were observed between the sexes or between the two patient groups. Temporomandibular joint sounds and difficulty of jaw movement were the most common of the TMD signs and symptoms. Open bite, posterior crossbite, and deep bite were the most prevalent types of malocclusion in both groups. Thus, some specific types of malocclusion were significantly associated with the occurrence of TMD.

Adolescent↗
PubMed1994

The prevalence of malocclusion amongst Hong Kong male dental students.

The prevalence of malocclusion and treatment need amongst young Chinese adults has not previously been documented in Hong Kong. One-hundred-and-eight Chinese male first year dental students were assessed using the Occlusal Index. It was found that 41.7 per cent of the 108 needed orthodontic treatment and 24.1 per cent needed comprehensive orthodontic treatment to correct major malocclusions. The most commonly occurring feature was crowding (38.9 per cent), followed by Class II malocclusion (21.3 per cent), and Class III malocclusion (14.8 per cent).

Adolescent↗
PubMed1994

[Lower lip biting habits and malocclusions]

In studying the cases of lower lip biting habits,we analyse and discuss its malocclusion and its orthodontic principle. It is indicated that prolonged lower lip biting habits always lead to overjet malocclusion,however,the mechanism by which overjet malocclusions are caused is different.We correct the malocclusions by the combination of lipbumper and removable,functional or fixed appliances to get the best results,depending on individual's age and the type of malocclusion.

Journal Article↗
PubMed1994

Diagnosis, complications, and treatment of dentoskeletal malocclusion.

The frequency of correctable malocclusion makes it imperative that the condition be diagnosed and referred for appropriate treatment. A complete dentofacial examination, which assesses facial symmetry and the dentition in the transverse, sagittal, and centric relations, is appropriate. Early diagnosis is imperative because malocclusion leads to long-term complications such as temporomandibular joint (TMJ) dysfunctions, perodontal disease, obstructive sleep apnea, psychological disorders, and articulation errors. A combination of orthodontic treatment and orthognathic surgery will correct the dentoskeletal malocclusion and prevent any long-term complications. The purpose of this case report is to describe a patient with severe dentoskeletal malocclusion who benefitted from appropriate orthodontic treatment and orthognathic surgery.

Adult↗
PubMed1986

A polynomial approach to craniofacial growth: description and comparison of adolescent males with normal occlusion and those with untreated Class II malocclusion.

Orthogonal polynomials are used to model the craniofacial growth of adolescent boys, aged 11 through 14 years, and to evaluate variation between normal occlusion and untreated Class II malocclusion. The results show linear growth (velocity) for the maxillary measures; their angular relationships to the cranial base remain stable throughout the age range. Mandibular measures show growth velocity and acceleration, indicating the adolescent growth spurt. For the majority (80%) of measures, boys with normal occlusion and those with Class II malocclusion were not significantly different. Mean growth velocity of basion-nasion is significantly greater for subjects with Class II, Division 1 malocclusion. Total mandibular length and the ANB angle display significant mean size (constant) differences between boys with normal occlusion and boys with untreated Class II malocclusion. The groups are comparable in growth velocity and acceleration, indicating that the size differences are established before 11 years of age and maintained during adolescence.

Adolescent↗
PubMed1989

An American Board of Orthodontics case report. Correction of a severe Class II malocclusion.

Many factors often combine to create a malocclusion. Broadly these include the genetic potential of the individual and environmental or local factors. Class II, Division 1 malocclusions may result from both inherited skeletal and dental patterns and an additional environmental factor such as thumb sucking or some other habit. Successful treatment of patients with this type of malocclusion requires both an orthodontic correction of the existing dental and skeletal problems and also control of any deleterious habit. The following case report deals with a patient who had such a malocclusion.

Adolescent↗
PubMed1992

The study of the maxillary sinus areas in different orthodontic malocclusions.

In the present study, the maxillary sinus areas have been investigated on orthopantomographs of 103 male and 86 female subjects either with ideal occlusions or with malocclusions. It has been found that malocclusions and sex factors have no effect on the size of the maxillary sinuses, and that sex is a significant factor only in Angle Class II malocclusions. The female subjects with Angle Class II malocclusions have larger maxillary sinuses than the male subjects and the other groups of female subjects.

Adolescent↗
PubMed1989

Obstructive sleep apnea syndrome in patients with class II malocclusion.

This study was designed to analyze the effect of class II malocclusion as a factor in the development of obstructive sleep apnea syndrome. Although mandibular retrusion has been reported coincidentally with obstructive sleep apnea syndrome many times, no causal relationship has been established. No previous study has analyzed the occurrence of obstructive sleep apnea syndrome in patients with class II malocclusion without sleep complaints. In this study, we selected 12 patients with class II malocclusion who required surgical mandibular-lengthening or repositioning procedures. These patients were surveyed for sleep habits or sleep complaints and then studied with overnight polysomnography for sleeping or breathing abnormalities. None of these patients had obstructive sleep apnea syndrome. From this sample population, an incidence of obstructive sleep apnea syndrome of no more than 26.5% in the surgical population of patients with class II malocclusion can be extrapolated.

Adolescent↗
PubMed1993

Perceptual characteristics of consonant errors associated with malocclusion.

The characteristics of articulation errors made by subjects having a class II, class II with open-bite, class III, or class III with open-bite malocclusion were compared. Regardless of the type of occlusal defect, errors occurred primarily on the sibilants /s, z/ and "sh, ch, j, dz," which were characterized mostly by combined visual and auditory distortions. Errors on the stop consonants /p, b, m, t, d, n/ occurred less frequently and, in all cases, consisted of isolated visual distortions. The type of malocclusion had a specific influence on the nature of the sound error. Subjects having a class II malocclusion, with or without an open bite, were able to assume a variety of tongue and mandibular postures that allowed them to approximate an /s/ or /z/. These compensations did not occur in subjects with a class III malocclusion. In these cases, the tongue remained distal to the mandibular incisors, causing the air stream to scatter. This study suggests that certain groups of sounds were more susceptible to specific types of misproductions and to particular types of occlusal defects.

Adolescent↗
PubMedDate not supplied

Masseter muscles electromyography study of individuals with and without malocclusion during dental clenching.

The present study had as an objective to verify the electromyographic activity of the masseter muscles during intercuspal maximal clenching in individuals with and without malocclusion. For such purpose, 37 individuals participated, constituting three distinct groups according to the classification of the occlusion: 9 individuals with clinically normal occlusion (G1), 17 individuals with Angle Class I malocclusion (G2) and 11 individuals with Angle Class II division 1 malocclusion (G3). Allparticipants were female, between the ages of 20 years, 7 months to 30 years, 8 months, with permanent natural teeth. The selection of the individuals was made with the application of a specific protocol, being complemented with an oral clinical myofunctional exam. The activity of the bilateral muscle masseter was investigated, in its superficial portion, by means of electromyographic evaluation with surface electrodes. Three consecutive intercuspal maximal clenching were recorded. The results showed that there was not significant statistical difference from the eletromyographic activity between the three groups. The conclusion was that the malocclusion did not interfere in the eletromyographic activity of the masseter muscles.

Adult↗
PubMed2006

[Cephalometric comparisons of the craniofacial characteristics of Class II 1 malocclusions with different vertical types in adolescences].

PURPOSE: To compare the craniofacial characteristics in Class II(1) malocclusions with different vertical types in adolescence. METHODS: The sample, including 60 males and 60 females, was divided into three groups equally based on their FMA degrees (high-angle group, average-angle group, low-angle group and normal occlusion group). Cephalograms were traced for all the subjects. Data were obtained to perform analysis of variance and LSD multiple range test. RESULTS: 1. The vertical growth of the anterior part of maxilla was greater than the posterior part in the three groups with Class II(1) malocclusion. The vertical dimension of the composite ramus-cranial floor was deficient relative to that of anterior maxilla in the high-angle and average-angle groups, the mandible rotated backward, especially in the high-angle group. In the low-angle group, the vertical dimension of the composite ramus-cranial floor grew excessively relative to that of posterior maxilla. The palatal plane and mandible plane rotated forward and upward. 2. The dentoalveolar characteristics of Class II(1) malocclusion group showed that: U6 tipped distally, the dentoalveolar height of L6 decreased, the functional occlusal plane (FOP) of average-angle group deviated away from the neutral occlusal axis (NOA), and rotated downward. In the high- angle group, the FOP deviated away from the NOA severely. The vertical dentoalveolar heights of U6 were normal. In the low-angle group, the vertical dentoalveolar heights of U6, the dentoalveolar height of L6 decreased, the angle of FOP between NOA showed no significantly difference from normal-occlusion group. CONCLUSION: There were different craniofacial vertical characteristics of Class II(1) malocclusion with different vertical types in adolescences. Different methods should be used to control the vertical dimensions in different types.

Adolescent↗
PubMed2005

Epidemiology of Hoffmeister's genetically determined predisposition to disturbed development of the dentition in patients with true skeletal class III malocclusion.

AIM: The prevalence of symptoms of Hoffmeister's "genetically determined predisposition to disturbed development of the dentition" as studied in patients with true skeletal Class III malocclusion; results of the study were compared with those found in the scientific literature regarding samples from the normal population and from orthodontic patients. PATIENTS AND METHODS: The prevalence of 20 defined symptoms was evaluated in 120 patients with true skeletal Class III malocclusion. The patients were selected on the basis of a positive family history and on the presentation of typical characteristics of a skeletal Class III morphology in a lateral cephalogram. The mean age of the patients evaluated was 12.4 years. The patients' files, 1161 radiographs and plaster casts were analyzed. The prevalence of the individual symptoms was compared by means of the chi(2)-test (p < or = 0.05). RESULTS: 118 patients (98.3%) were found to have 292 symptoms of "genetically determined predisposition to disturbed development of the dentition". Increased distance between molar buds, atypical tooth bud position and atypical root shape were the symptoms recorded most frequently. With regard to the simultaneous existence of several symptoms, the combination of four such symptoms was most frequent (20.8%), followed by the combination of three symptoms (15.8%), and five symptoms (15.0%). Congenital hypodontia was found in 19.2% of the patients. CONCLUSION: It should be kept in mind for patients with true skeletal Class III malocclusion that this type of dysgnathia is most likely combined with other symptoms of disturbed development of the dentition. The higher prevalence of those symptoms found in patients with skeletal Class III malocclusion when compared with the normal population and other orthodontic patients renders orthodontic treatment of those patients more difficult and calls for comprehensive clinical and radiological examination prior to any treatment.

Adolescent↗