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The Angle Orthodontist Jul 2023To determine patient perceptions and attitudes regarding posttreatment changes at least 2 years after completion of orthodontic treatment.
OBJECTIVES
To determine patient perceptions and attitudes regarding posttreatment changes at least 2 years after completion of orthodontic treatment.
MATERIALS AND METHODS
A total of 125 patients (75 females, 50 males, aged 22.93 ± 2.98 years) were enrolled at least 2 years after debonding. Participants had either vacuum-formed retainers (VFRs) or bonded retainers (BRs). Posttreatment changes were evaluated digitally by comparing tooth positions at debonding and at least 2 years after debonding. A questionnaire was used to assess patient attitudes. Retainer usage, awareness of relapse, satisfaction with their current occlusion, and whether posttreatment changes were severe enough for them to consider retreatment were investigated.
RESULTS
All patients showed some posttreatment changes in irregularity. Only 74% of patients wearing VFRs and 47.1% of patients wearing BRs were aware of posttreatment changes. Patients were more likely to notice posttreatment changes if there was an increase in mandibular irregularity of 1-3 mm. Awareness of posttreatment changes in the upper arch was higher in both groups. The majority of participants were satisfied with the results even if they noticed some minor posttreatment changes (VFR, 69.4%; BR, 76.5%). Dissatisfaction with posttreatment changes did not necessarily mean that a patient wanted retreatment.
CONCLUSIONS
A total of 26% of patients wearing VFRs and 52.9% of patients wearing BRs were unaware of posttreatment changes. Approximately half of the patients who noticed posttreatment changes were still satisfied with the result 2 years after debonding. Even patients dissatisfied with the effect of posttreatment changes do not necessarily want retreatment.
Topics: Male; Female; Humans; Orthodontic Appliance Design; Dental Occlusion; Mandible; Orthodontic Appliances, Fixed; Orthodontic Retainers; Attitude
PubMed: 36946588
DOI: 10.2319/100222-677.1 -
Srpski Arhiv Za Celokupno Lekarstvo 2004The objective of this paper was to show the historical perspective of the "long centric" occlusal concept and its importance in the modern dentistry, especially from the... (Review)
Review
The objective of this paper was to show the historical perspective of the "long centric" occlusal concept and its importance in the modern dentistry, especially from the gnathological aspect. The "long centric" concept represents therapeutic modality used in modern dentistry and occlusal adjustment in all patients showing differences in strong and weak closure of the lower jaw starting from the position of physiological rest. "Long centric" concept is applied only for anterior teeth and occlusal movements from rather than toward the center. Whenever the "long centric" parameters are not adequate, occlusal disturbance, resulting from the "wedge" effect during the initial closure of the lower jaw, is present. Different degrees of abrasion or hypermobility of the teeth are often the result of the above-mentioned occlusal disturbances and can potentially trigger bruxism and malfunction. Modus procedendi should be the regular approach of every dentist to any occlusion, because only the built-in "long centric" efficiently contributes to the occlusal stability of the anterior portion of the dentition. All occlusions should be routinely tested regarding their need for "long centric", especially when the extensive therapeutic interventions (conservative, prosthetics) of the occlusal complex are required.
Topics: Centric Relation; Dental Occlusion, Centric; Humans; Occlusal Adjustment
PubMed: 15938227
DOI: 10.2298/sarh0412441m -
Sensors (Basel, Switzerland) Mar 2024Body biomechanics and dental occlusion are related, but this interaction is not fully elucidated. The aim of this study was to investigate the association between body...
Body biomechanics and dental occlusion are related, but this interaction is not fully elucidated. The aim of this study was to investigate the association between body posture and occlusion in patients with and without dental pathology. A cross-sectional study was carried out with 29 patients divided into a control group and a group with pathology (malocclusions). Body posture was evaluated by dynamic baropodometry, analyzing parameters such as the line of gait and the anteroposterior and lateral position of the center of pressure (CoP). Occlusion was classified radiographically according to the sagittal skeletal relationship. Results showed significant differences in mean position phase line between groups ( = 0.01-0.02), with means of 115.85 ± 16.98 mm vs. 95.74 ± 24.47 mm (left side) and 109.03 ± 18.03 mm vs. 91.23 ± 20.80 mm (right side) for controls and pathologies, respectively. The effect size was large (Cohen's d 0.97 and 0.92). There were no differences in the anteroposterior ( = 0.38) or lateral ( = 0.78) position of the CoP. In gait analysis, significant differences were observed in left (548.89 ± 127.50 N vs. 360.15 ± 125.78 N, < 0.001) and right (535.71 ± 131.57 N vs. 342.70 ± 108.40 N, < 0.001) maximum heel strength between groups. The results suggest an association between body posture and occlusion, although further studies are needed to confirm this relationship. An integrated postural and occlusal approach could optimize the diagnosis and treatment of dental patients.
Topics: Humans; Cross-Sectional Studies; Dental Occlusion; Posture; Malocclusion; Gait
PubMed: 38544184
DOI: 10.3390/s24061921 -
The Journal of Prosthetic Dentistry Sep 2019This comprehensive review of the 2018 dental literature is provided to inform busy dentists about progress in the profession. Developed by the Committee on Scientific... (Review)
Review
This comprehensive review of the 2018 dental literature is provided to inform busy dentists about progress in the profession. Developed by the Committee on Scientific Investigation of the American Academy of Restorative Dentistry, each author brings discipline-specific expertise to one of the 8 sections of the report including (1) prosthodontics; (2) periodontics, alveolar bone, and peri-implant tissues; (3) implant dentistry; (4) dental materials and therapeutics; (5) occlusion and temporomandibular disorders; (6) sleep-related breathing disorders; (7) oral medicine and oral and maxillofacial surgery; and (8) dental caries and cariology. The report targets important information that will likely influence day-to-day treatment decisions. Each review is not intended to stand alone but to update interested readers so that they may visit source materials if greater detail is desired. As the profession continues its march toward evidence-based clinical decision-making, an already voluminous library of potentially valuable dental literature continues to grow. It is the intention of this review and its authors to provide assistance in navigating the extensive dental literature published in 2018. It is our hope that readers find this work useful in the clinical management of patients moving forward.
Topics: Dental Caries; Dental Materials; Dental Occlusion; Humans; Periodontics; Prosthodontics; United States
PubMed: 31405523
DOI: 10.1016/j.prosdent.2019.05.010 -
The Angle Orthodontist Mar 2019This report illustrates successful nonsurgical orthodontic treatment of a hypodivergent adult patient with bilateral posterior scissors bite (Brodie bite) and excessive...
This report illustrates successful nonsurgical orthodontic treatment of a hypodivergent adult patient with bilateral posterior scissors bite (Brodie bite) and excessive overjet. A 26-year-old woman primarily reported maxillary incisor protrusion. She was diagnosed with Class ll division 1 malocclusion with skeletal Class I, short face, low mandibular plane angle and bilateral posterior scissors bite. A lingual arch with anterior bite block and posterior miniscrews with preadjusted edgewise appliances were used to improve the bilateral scissors bite. After achieving molar occlusion, the maxillary first premolars were extracted, and six miniscrews were used to improve the anterior-posterior and vertical discrepancies. After active treatment for 56 months, the convex facial profile with excessively protruded lips was improved and good interdigitation with ideal incisor relationship was achieved. Additionally, the irregular movements of the incisal path and the bilateral condyles during lateral excursion were improved. At 13 months of retention, a satisfactory facial profile, occlusion, and jaw movements were maintained. The treatment results suggest that miniscrews and fixed bite blocks were effective and efficient to facilitate correction of the bilateral scissors bite, excessive overjet, and vertical relationship correction in this nonsurgical orthodontic treatment.
Topics: Adult; Cephalometry; Dental Occlusion; Female; Humans; Malocclusion, Angle Class II; Malocclusion, Angle Class III; Open Bite; Orthodontic Anchorage Procedures; Overbite; Tooth Movement Techniques
PubMed: 30080111
DOI: 10.2319/111617-791.1 -
Journal of Oral Rehabilitation Jun 2019Difficulties and limitations on masticatory function are among the main reasons why patients with temporomandibular disorder (TMD) seek care.
BACKGROUND
Difficulties and limitations on masticatory function are among the main reasons why patients with temporomandibular disorder (TMD) seek care.
OBJECTIVE
To evaluate the masticatory behaviour and perception of chewing difficulties in adults with mild TMD of recent onset, considering the presence of malocclusion.
METHODS
Eighty-one young adults were divided into groups according to the presence of TMD and malocclusion: Non-TMD Normal Occlusion (n = 18), Non-TMD Malocclusion (n = 22), TMD Normal Occlusion (n = 18) and TMD Malocclusion (n = 23). TMD was assessed using the TMD Research Diagnostic Criteria and volunteers also answered questionnaires regarding their perception about jaw functional limitation and difficulty to chew foods of different textures. Masticatory and swallowing behaviours were assessed using the Orofacial Myofunctional Evaluation with Scores (OMES) protocol. Chewing time and chewing frequency taken to ingest the test-food were also obtained. Two-way-ANOVA was used to analyse the TMD, occlusion and TMD × occlusion interaction effects.
RESULTS
Temporomandibular disorder effect was observed on vertical jaw mobility and jaw function limitation total scores, meaning that groups differed in the perception of opening limitation and mandibular limitation according to TMD status with a medium effect size. Also, more changes in chewing function (OMES-chewing score) and higher chewing frequency was observed in the presence of TMD (P < 0.05). Occlusion effect was only observed on OMES-swallowing score and no TMD × occlusion interaction effect was observed.
CONCLUSION
Changes in chewing behaviour, frequency and perception of mandibular limitation was observed in the presence of TMD, pointing out the importance of functional evaluation when planning and establishing a treatment plan.
Topics: Deglutition; Dental Occlusion; Humans; Mandible; Mastication; Temporomandibular Joint Disorders; Young Adult
PubMed: 30809826
DOI: 10.1111/joor.12779 -
The Angle Orthodontist Jan 2010To test the hypothesis that there is no relationship between static occlusion and dynamic occlusion.
OBJECTIVES
To test the hypothesis that there is no relationship between static occlusion and dynamic occlusion.
MATERIALS AND METHODS
The relationship between static and dynamic occlusion was investigated in a sample of 94 dental students (39 males and 55 females) with an age range of 21-30 years. Static occlusion was determined by intraoral examination. Dynamic occlusion was determined in regulated lateral (0.5 mm and 3 mm lateral to the intercuspal position) and protrusive movements of the mandible by intraoral examination with the aid of shimstock.
RESULTS
At the 0.5 mm lateral excursion, 24.5% had bilateral group function and 12.7% had bilateral canine guidance. At the 3 mm positions, the guidance pattern changed to a predominantly canine guidance. Fifty percent of subjects had bilateral canine guidance, and only 8.8% had bilateral group function. In terms of the anterior guidance pattern, a predominant anterior contact with posterior disocclusion (77.5%) was noted. Examination of the relationship between static and dynamic occlusions revealed that at the 0.5 mm position, the pattern of dynamic occlusion was different in relation to various static occlusion features but without reaching a significant level. While at the 3 mm position, the pattern of dynamic occlusion was significantly affected by incisor relationship. The distribution of protrusive excursion patterns was significantly influenced by incisor, canine, and molar relationships.
CONCLUSIONS
The hypothesis is rejected. An association exists between dynamic occlusion and different aspects of static occlusion.
Topics: Adult; Cuspid; Dental Occlusion; Dental Occlusion, Balanced; Dental Occlusion, Centric; Female; Humans; Incisor; Jaw Relation Record; Male; Malocclusion, Angle Class I; Malocclusion, Angle Class II; Malocclusion, Angle Class III; Mandible; Molar; Movement; Young Adult
PubMed: 19852642
DOI: 10.2319/021209-98.1 -
The Angle Orthodontist 1995Extraction has been a controversial subject for as long as the specialty of orthodontics has existed. Some authors believe that the extraction of premolars leads to... (Review)
Review
Extraction has been a controversial subject for as long as the specialty of orthodontics has existed. Some authors believe that the extraction of premolars leads to temporomandibular disorders. This occurs, they say, because the vertical dimension collapses. Concomitantly, over-retraction and retroclination of the incisors cause the facial profile to flatten, bring about premature anterior contacts, and distally displace the mandible and mandibular condyle. Numerous correlation studies in the dental literature do not support this contention. There appears to be no higher incidence of temporomandibular disorders in patients treated with the extraction of premolars than in nontreated patients or those treated without extractions. Analysis of premolar extraction cases reveals that there is no collapse of the vertical dimension; on the contrary, the vertical dimension is either maintained or slightly opened. Similarly, there is no evidence that premolar extraction causes undesirable flattening of the facial profile. The facial profile established during treatment is primarily the result of diagnosis and treatment mechanics. Excessive anterior interferences resulting in possible posterior condyle displacement are the result of treatment mechanics. When arches are leveled properly and space closure and overjet reduction are adequately controlled, there is no reason that such interferences should occur.
Topics: Bicuspid; Dental Occlusion, Traumatic; Dental Stress Analysis; Face; Humans; Malocclusion, Angle Class II; Mandibular Condyle; Maxilla; Orthodontics, Corrective; Temporomandibular Joint Disorders; Tooth Extraction; Vertical Dimension
PubMed: 7639431
DOI: 10.1043/0003-3219(1995)065<0175:TEDAIR>2.0.CO;2 -
Hua Xi Kou Qiang Yi Xue Za Zhi = Huaxi... Feb 2018The occlusion design of dental implants is related to the growing popularity of dental implantology. This paper discusses the occlusion design of the edentulous implant...
The occlusion design of dental implants is related to the growing popularity of dental implantology. This paper discusses the occlusion design of the edentulous implant prosthesis and the relationships between stress change and the alveolar bone and between the occlusal design and implantation complications. The horizontal relationship of condyle, the design of the canine-guided occlusion, and the similarities and differences between the dental implant and the natural teeth on biteforce response are mentioned.
Topics: Alveolar Bone Loss; Dental Implantation, Endosseous; Dental Implants; Dental Occlusion; Dental Prosthesis Design; Dental Prosthesis, Implant-Supported; Dental Restoration Failure; Humans; Jaw, Edentulous; Jaw, Edentulous, Partially
PubMed: 29594987
DOI: 10.7518/hxkq.2018.01.001 -
The Journal of Craniofacial SurgeryMandibular fractures are the most common type, accounting for about 71% of facial fractures in children. The mandible is the only movable bone in the craniomaxillofacial...
Mandibular fractures are the most common type, accounting for about 71% of facial fractures in children. The mandible is the only movable bone in the craniomaxillofacial region. The injury of the mandible has a serious impact on the functions of children's mouth opening, chewing, pronunciation, and occlusion. Therefore, the treatment of children's mandibular fractures is particularly important. Because of the characteristics of children with permanent tooth germ blocking and strong skeletal development, the treatment methods of adults cannot simply be used in children with mandibular fractures. Here, we demonstrate the simple, reliable method using 3-dimensional-printing splint for stability of the fracture segments in pediatric patients.
Topics: Adult; Humans; Child; Mandibular Fractures; Splints; Mandible; Occlusal Splints; Dental Occlusion; Fracture Fixation, Internal
PubMed: 36214672
DOI: 10.1097/SCS.0000000000008984