Comparison of Occlusal Parameters between Open Bite and Nonopen Bite Patients Using the T-Scan III System: A Pilot Study

Objective To evaluate and compare the first tooth contact region, occlusion time, time to generate total force, and force distribution between open bite (OB) and non-OB (NOB) patients at the maximum intercuspation position using the T-Scan III system. Materials and Methods Sixteen patients were divided into the OB and NOB groups (n = 8 for each group). The T-Scan III system was used to evaluate the first tooth contact region, occlusion time, time to generate total force, and force distribution. Statistical Analysis The mean patient age, overjet, overbite, occlusion time, and time to generate total force were compared between the groups by independent samples t-test. Relative force distributions between groups and among regions were compared by the Mann–Whitney U- and Kruskal–Wallis H-tests, respectively. A probability value of less than 5% (p < 0.05) was considered significant. Results Differences in the first tooth contact region between groups were observed. The molar region was the first tooth contact region in the OB group, while first tooth contact was observed in all regions in the NOB group. Neither the occlusion time nor the time to generate total force was significantly different between the groups (p > 0.05). The highest force distributions were observed in the molar regions in both groups. Significant intragroup differences were found among all regions (p < 0.05), except between the anterior and premolar regions in the NOB group (p = 0.317). Intergroup differences in the force distributions in the anterior (p = 0.000), premolar (p = 0.038), and molar (p = 0.007) regions were significant. Conclusion Unlike in the NOB group, in which first tooth contact occurred in every region, in the OB group, first tooth contact occurred only in the molar region. Compared with those in the NOB group, the force distributions in the OB group were approximately 1.5 times higher in the molar region but were significantly lower in the anterior and premolar regions.

Oral-Health-Related Quality of Life (OHRQoL) and Anterior Open Bite in Adult Patients: A Case-Control Study

Oral-health-related quality of life (OHRQoL) is defined as the impact of oral health on activities of daily living. Malocclusions are a public health problem with a high prevalence. Different studies have concluded that malocclusions negatively affect OHRQoL in patients of all ages. The aim of this study was to analyze the influence of having an anterior open bite on the OHRQoL of adult patients. Materials and Methods: A case-control study (1:1) was carried out with a sample size of 80 adults at the University of Salamanca in 2021. The case group (n = 40) was made up of patients with an anterior open bite, and the control group (n = 40) contained patients without an anterior open bite. OHRQoL was assessed using the Oral Health Impact Profile-14 (OHIP-14) questionnaire. The influences of gender and age on the OHRQoL of the patients were also analyzed. Results: There were no significant differences in gender or age between the case and control groups. An anterior open bite was not found to influence the OHRQoL of adult patients. Age was not shown to significantly influence OHRQoL. Female patients with an anterior open bite had higher scores in the handicap domain of the OHIP-14 questionnaire compared with male patients (p < 0.05). Conclusions: Anterior open bite can influence the OHRQoL of orthodontic patients. Gender can be considered an influencing factor.

Aesthetic and functional rehabilitation in a patient with anterior skeletal open bite using lithium dissilicate glass-reinforced ceramic: a case report

The aim of this clinical report is to present the replacement of unsatisfactory metal-ceramic crowns of elements 12, 11, 21 and 22, by lithium disilicate glass-reinforced ceramic crowns in a patient with skeletal anterior open bite. A patient sought care at the Dental Hospital at the School of Dentistry of UFU, complaining of odor between the metal-ceramic crowns of the antero-superior teeth. After clinical and radiographic examination, invasion of the biological space was noticed, surgery was indicated in order to restore the biological space. After healing, the pre-existing cast metal posts were masked using an opaque composite resin and the teeth were reprepared for full all-ceramic crowns. Impressions were taken in two steps, using PVS associated to retraction cords. The ceramic copings were obtained in lithium disilicate ceramic, and the veneering was performed by stratification. After testing the ceramics crowns in relation to, fit, function and aesthetic results, cementation was completed using modified absolute isolation, followed by prophylaxis of preparations with pumice and saline, surface treatment of the ceramic restorations and luting using self-adhesive resin cement. Finally, an occlusal splint was produced to control the effects of bruxism and orofacial pain symptoms. The anterior open skeletal bite was a challenging factor for the rehabilitation of this patient; however, one must consider the entire process that the patient would undergo if choosing for orthognathic surgery, and the patient should be aware of the case limitations. In addition, the use of lithium disilicate glass-reinforced ceramics proved the versatility of this material for anterior aesthetic restorations.

Combined orthodontic and surgical open bite correction:

This paper is divided into Part 1, the study findings, and Part 2, a detailed explanation of orthodontic and surgical methods used in the study. In this Part 1, treatment protocols will be mentioned, but explained in Part 2.

Ethnic Dental Biprotrusion: A Clinical Case

The dental biprotrusion characteristic of certain ethnic groups raises the question of treatment or of abstaining. In many situations this is accompanied by open bite in relation to the lingual volume or lingual support during pronunciation, the therapeutic solution must be considered and individualized. This article describes the orthodontic treatment of an anterior open bite of functional origin in a 23-year-old adult patient embarrassed by the cosmetic defect.

Prevalence of malocclusion in early childhood and its associated factors in a primary care service in Brazil

ABSTRACT Purpose to evaluate the prevalence of malocclusion and its associated factors of children cared for by a PHC Service in Porto Alegre, Brazil. Methods a cross-sectional study nested in a cohort, carried out in 12 Health Care Practices. Of the 414 children in the cohort examined, 268 were assessed for malocclusion. The presence of anterior open bite, posterior and anterior crossbite was evaluated by the criteria of Foster and Hamilton. Socioeconomic variables, breastfeeding habits and pacifier use information were collected through a standardized questionnaire. Data analysis was performed using a hierarchical approach by Poisson Regression with robust variance. Results out of the total 268 evaluated, 135 (50.4%) were boys, and the average age was 28.6 (± 11.9) months. Out of the 143 (53.4%) cases of malocclusion, 113 were anterior open bite, 16 were anterior crossbite, 27 were posterior crossbite, and 38 had increased overjet. In the final analysis, it was observed that there was a higher prevalence of malocclusion in children who never breastfed (PR = 1.44; 95%CI 1.00-2.08) and who always used a pacifier to sleep (PR = 1.81; 95%CI 1.14-2.86). Conclusion the prevalence of malocclusion in this population was high and was associated with behavioral habits, such as the use of pacifier and not breastfeeding.

Assessment of oral health literacy of principal caregivers and its association with dental caries in Mexican disabled pediatric patients

Open bite can be defined as an absence of occlusion, most frequently located in the anterior region of dental arches and its etiology is multifactorial. We present a clinical case of an 8 years and 10 months child presenting an anterior open bite (AOB) with transverse maxillary deficiency caused by tongue thrust during mixed dentition. The malocclusion was corrected by means of a McNamara expander with a palatal crib jointly with the association of speech therapy for tongue repositioning, and otolaryngology to treat adenoid hypertrophy due to its correlation with AOB. The multidisciplinary approach was effective in correcting the malocclusion with stable results after 2 years post-treatment.

Multidisciplinary approach in the anterior open bite using a McNamara expander with palatal crib during mixed dentition stage: A case report

Open bite can be defined as an absence of occlusion, most frequently located in the anterior region of dental arches and its etiology is multifactorial. We present a clinical case of an 8 years and 10 months child presenting an anterior open bite (AOB) with transverse maxillary deficiency caused by tongue thrust during mixed dentition. The malocclusion was corrected by means of a McNamara expander with a palatal crib jointly with the association of speech therapy for tongue repositioning, and otolaryngology to treat adenoid hypertrophy due to its correlation with AOB. The multidisciplinary approach was effective in correcting the malocclusion with stable results after 2 years post-treatment.

Custom-Made Alloplastic Prosthetic Implant to Treat Temporomandibular Joint Ankylosis in Pediatric Patients: A Case Study

Temporomandibular Joint (TMJ) ankylosis represents a fairly common condition which surgeons need to face. According to Rowe, it can be defined as a restricted functional capacity of the jaw with limited movements owing to bony or fibrous adhesions between the condyle and either glenoid fossa, disc or eminence (or both). It can become a disease which impacts patients’ daily life, who suffer from limited mandibular excursion with reduced intercisal opening, anterior open bite, inability to swallow, sleep disorders, and speech problems. In children this may also result in abnormal mandibular and facial growth. In this paper, we deal with the case of a child with an important momolateral ankylosis, previously treated surgically with Costochondral Grafting arthroplasty without success and subsequently treated with a custom-made prosthesis.