Comparison of skeletal and dental effects of two different tooth-tissue-borne types of rapid maxillary expansion appliances: A CBCT retrospective study.

OBJECTIVES: To compare the skeletal and dental effects of different types of rapid maxillary expansion (RME) appliances using cone-beam computed tomography (CBCT). MATERIALS/METHODS: This multi-centre study was conducted with a total of 56 patients. The sample consisted of two groups including the McNamara-Type RME (MNR) group with 30 patients (16 females, 14 males, mean age: 13.38 ± 1.16 years) and Full-Coverage RME (FCR) group with 26 patients (10 females, 16 males, mean age:13.78 ± 1.06 years). Twenty-one parameters were measured on CBCT images including 4 maxillary skeletal, 12 maxillary alveolar, and 5 maxillary dental measurements, and the data were analysed using the SPSS 20.0 software. RESULTS: The rates of increase in the palatal maxillary width (PMW) (3), PMW(4), and PMW(6) were significantly higher in the MNR group (P < .05). While the rates of increase in the buccal maxillary width (BMW) (3) and BMW(4) were statistically higher in the MNR group, the rate of increase in BMW (6) was higher in the FCR group (P < .05). The increases in HPW (4), HPW (6), PAA4(°), and PAA6(°), which are parameters about hard palate width (HPW) and palatal alveolar angle (PAA), were also significantly higher in the MNR group (P < .05). The increases in PAW (4) and PAW (6), referring to the widths between the palatal root apices were significantly higher in the MNR group (P < .05).The increase in Slope-6(°) was also higher in the MNR group (P < .05). CONCLUSION: Expansion in the palatal region on the alveolar level was higher in MNR than in FCR, while expansion in FCR was the highest in the posterior. In both appliances, there was tipping in the buccal direction in both alveolar bone and teeth, and the rate of this tipping was higher in MNR.

Effects of reverse headgear therapy on mandibular trabecular structure: A fractal analysis study.

OBJECTIVES: The aim of this study was to assess the effects of reverse headgear (RHG) treatment combined with rapid maxillary expansion (RME) on the trabecular structure of the mandibula using fractal dimension (FD) analysis. METHODS: Forty-four individuals with skeletal Class III malocclusion were selected from the archives and divided into two groups as patients who underwent treatment with RME + RHG (RHG-G, 22 patients) and untreated control group (C-G, 22 patients). The before (T0) and after (T1) treatment lateral cephalometric and panoramic radiographs were collected in the RHG-G and in the control group, radiographs obtained with similar time intervals were grouped as T0 and T1. Cephalometric and FD analysis was conducted on T0 and T1 lateral cephalometric and panoramic radiographs. The intragroup comparison of cephalometric and FD data was performed using paired t test and Wilcoxon Signed Ranks test, while independent t test and Mann-Whitney U test were used for intergroup comparison. RESULTS: C-G had higher FD values in the right mandibular corpus and left mandibular ramus values at T0 (P < .05). The only significant difference in the intragroup comparisons was detected in the FD values of the right mandibular corpus in the C-G (P < .05). No significant differences were found in the FD between the groups in any of the areas measured (P > .05). CONCLUSIONS: RME + RHG therapy did not cause any significant trabecular changes in the mandibula when compared to the control group.

The effect of different concentrations of topical ozone administration on bone formation in orthopedically expanded suture in rats.

BACKGROUND/OBJECTIVE: The aim of this study was to investigate the effects of different concentrations of ozone (O3) therapy on bone regeneration in response to an expansion of the inter-premaxillary suture in rats. MATERIALS AND METHODS: Forty-eight Wistar rats were randomly divided into four groups (n = 12). In groups I, II, and III, 1ml of O3 at 10, 25, and 40 µg/ml was injected at the premaxillary suture, respectively. In group IV (control group), 1ml of saline solution was injected at the same point during the expansion procedure for 5 days. Bone regeneration in the suture was evaluated histomorphometrically. The area of new bone and fibrotic area, the number of osteoblasts and osteoclasts, and the amount of vascularity were measured and compared. The density of the newly formed bone in the expansion area was measured by using cone beam computed tomography. Data were analyzed using the Kruskal-Wallis one-way analysis of variance and post hoc Student-Newman-Keuls tests. RESULTS: New bone area, fibrotic area, osteoblast and osteoclast numbers, and the amount of vascularity were significantly higher in experimental groups compared with the control group (P < 0.001). The density of newly formed bone (P < 0.001), new bone formation (P = 0.009), number of capillaries (P < 0.001), number of osteoclasts (P = 0.016), and number of osteoblasts (P < 0.001) in the maxillary sutures were highest in the 25 µg/ml O3 group compared with the other experimental groups and control group. CONCLUSIONS/IMPLICATIONS: The application of O3 therapy can stimulate bone regeneration in an orthopedically expanded inter-premaxillary suture during both the expansion and retention periods.

Assessment of the Facial Soft Tissue Thickness of the Patients Affected by Unilateral Cleft Lip and Palate Using Cone Beam Computed Tomography.

AIM: The aim of the study was to evaluate the soft tissue thickness of the patients affected by unilateral cleft lip and palate (UCLP) and to compare the findings with a matched control group without cleft using cone beam computed tomography (CBCT). METHODS: The study sample consisted of 66 patients (31 women and 35 men) divided into 2 groups as UCLP group (34 patients; 23 men and 11 women; 9 right sided and 25 left sided; mean age: 14.11 ±â€Š3.48 years) and control group (32 patients; 12 men and 20 women; mean age: 15.10 ±â€Š3.13 years) without any cleft. Angular angle between Nasion-A line and Nasion-B line (ANB), angle between Sella-Nasion line and Gonion-Menton line (SN-MP) and linear (glabella, nasion, rhinion, subnasale, labrale superius, stomion, labrale inferius, labiomentale, pogonion, and gnathion) measurements were done using CBCT. Student t test was performed to compare the variables between the groups. RESULTS: Soft tissue thickness values for men were higher in both groups, except for rhinion and glabella. Subnasale for women (P = 0.000), men (P = 0.006), and total samples (P = 0.000) and the variable of the labrale superius for men (P = 0.047) and total samples (P = 0.040) were found to be statistically significantly thinner in the UCLP group. SN-MP had significant affect on subnasale thickness (R = 15.8; Beta = -0.397; P = 0.001). CONCLUSION: Thickness of the subnasale and the labrale superius were found to be statistically significantly thinner in the UCLP group compared with the controls.

Comparison of the Flexural Strength of Three Different Aged and Nonaged 3D-Printed Permanent Crown Resins.

AIM: The aim of this study was to evaluate the flexural strength properties of three different aged and nonaged 3D-printed resins built by different 3D printing systems used in dental applications. MATERIALS AND METHODS: Bars (2 × 2 × 25 mm) were additively fabricated using a 3D printer and different dental crown resins (Saremco Crowntec, Senertek P-Crown V2, and Senertek P-Crown V3) per the manufacturers' recommendations. Each subgroup was divided into aged and nonaged subgroups (n = 10 bars per group). Thermocycling procedures (5° to 55°C; 5,000 cycles) were performed under favorable conditions for the aged subgroups from each material. Flexural strength (MPa) was measured in all samples using a universal test machine. RESULTS: When both aged and nonaged resins are compared, significant differences were found in flexural strength measurements (P < .001). The highest flexural strength was observed in the Saremco Crowntec group, while the lowest flexural strength was observed in the Senertek P Crown V2 group. The flexural strength measurements of Saremco Crowntec and Senertek P Crown V3 displayed no significant difference between their aged and nonaged groups (P > .05), while Senertek P Crown V2 (P = .039) showed significant differences between its aged and nonaged groups. CONCLUSIONS: Saremco Crowntec showed the highest flexural strength both in aged and nonaged groups, while Senertek P Crown V2 had the lowest strength. The artificial aging process decreased flexural strength values in all 3D-printed resin groups.

Quality of information on Instagram about masseter botox injection for bruxism.

STATEMENT OF PROBLEM: Nowadays, masseter botulinum toxin injections are frequently used to treat bruxism. People first search for social media resources for their health-related problems. However, the quality of the information on Instagram about masseter botox injection for bruxism is unknown. PURPOSE: The aim of this study was to evaluate the quality ant content of the Instagram posts shared publicly about masseter botox. The hashtag #masseterbotox was searched on Instagram. MATERIALS AND METHODS: A total of 1000 posts were scanned. Unrelated posts were excluded from the study. The video posts were evaluated by using Global Quality Scale (GQS) and reliability of information toolkits. RESULTS: One-hundred seventy-nine photograph and 65 video posts that met the criteria were analyzed. Most of the posts were posted by doctors and healthcare professionals (151 posts), followed by clinics (87 posts) and patients (6 posts). The information reliability scores of Instagram video posts about #masseterbotox were found to be very low (1.34±1.28). Number of views, reliability of information and GQS scores were not statistically significant between groups according to the source of the video posts (p>.05). GQS scores were higher in experience videos than information and advertisement videos (p<.05). CONCLUSIONS: Clinicians should warn their patients about the reliability of information on Instagram and should guide them to the right social media resources. CLINICAL IMPLICATIONS: Dental professionals should direct their patients about masseter botox injections to the right resources on social media platforms.

Sleep disordered breathing and oral health-related quality of life in children with different skeletal malocclusions.

OBJECTIVE: To evaluate the relationship among different skeletal malocclusion patterns, sleep-disordered breathing (SDB) and children's oral health-related quality of life (OHRQoL). METHODS: Two hundred-five patients were divided into three groups, considering skeletal malocclusion. Parents completed the Pediatric Sleep Questionnaire (PSQ) on behalf of the patients, who completed the 14-question version of the Oral Health Impact Profile (OHIP-14). RESULTS: SDB was observed in 10.7% of children. The overall prevalence of snoring, difficulty breathing during sleeping, mouth breathing, and dry mouth on awakening was 8.78%, 7.31%, 36.09%, and 37.07%, respectively. However, there was no significant difference in OHIP-14 parameters among the skeletal groups. A positive correlation was found between OHIP-14 and PSQ and was significant in Class I and III. CONCLUSION: Although there was no significant difference, SDB risk and sleep quality were found as most to least problematic, in the following sequential order: Class II > Class III > Class I.

Evaluation of temporomandibular disorder symptoms and oral health-related quality of life in adolescent orthodontic patients with different dental malocclusions.

Objective: To estimate the prevalence of temporomandibular disorders in adolescent orthodontic patients with different dental malocclusions and to assess the relationship between oral health-related quality of life.Methods: This study was carried out on 648 randomly selected individuals 14-19 years of age. Diagnostic Criteria for Temporomandibular Disorders (DC/TMD), Fonseca Questionnaire, and Oral Health Impact Profile-14 (OHIP-14) forms were used.Results: The GCPS, TMD Pain, Fonseca, OHIP-14, PHQ-9, GAD-7, OBC, and PHQ-15 mean scores of female participants were statistically significantly higher than males (p < 0.05).There was a significant difference among the malocclusion groups in terms of their mean scores in GCPS, Fonseca, and OHIP-14 (p < 0.05).The age values and JFLS, TMD Pain, Fonseca, OHIP-14, PHQ-9, GAD-7, and PHQ-15 were statistically significant correlations in the positive direction.Conclusion: The DC/TMD form allows both a physical assessment of Axis I and II that examines psychosocial status and pain-related disorders and a more comprehensive assessment. The mean OHIP-14 and Fonseca questionnaire scores of Class III groups were found to be significantly higher.

Factors of life satisfaction and happiness among dentists: A cross sectional study.

Objectives: The present study aimed to determine the levels of happiness among dentists and to investigate their associations with emotional well-being and satisfaction with life. Methods: Dentists in Turkey were surveyed with 25 questions on age, gender, place of work, and years of experience, and a five-item life satisfaction scale. Results: A total of 486 dentists completed the survey. Dentists' workplaces and professional titles were associated with their life satisfaction scores. Most dentists (n = 373; 76.25%) reported feeling pressured in their work environment, and the institution where they worked was significantly associated with the degree of pressure (p < 0.001). Institution (p < 0.001), job title (p < 0.001), and work experience (p < 0.019) were significant factors in whether they would recommend their profession to others. Dentists' institutions and titles were significantly associated with life satisfaction (p < 0.001). Conclusions: Our findings suggest that dentists in Turkey have a low life satisfaction with respect to that of other professionals and dentists from other countries. In addition, the factors associated with life satisfaction vary.

Instagram as a social media tool about orthognathic surgery.

Background: The aim of this short communication was to evaluate the quality and content of the Instagram posts about orthognathic surgery. Methods: Two hashtags #jawsurgery and #orthognathicsurgery were searched on Instagramin this retrospective Instagram post analysis study. Selected 100 posts for each hashtag were analyzed for type, total number of likes, comments, purpose and source. Results: Most of the posts about #jawsurgery were uploaded by patients (56.1%) who shared their personal experience. Most of the posts about #orthognathicsurgery also were uploaded by clinics (49.1%). Most of posts (39.6%) provided information about orthognathic surgery in #orthognaticsurgery. Posts generally involved by patient's experience (49.1%), followed by patient information (28.1%), and advertisement (22.8%) in #jawsurgery. Conclusion: Patients should be educated by orthodontists and maxillofacial surgeons about Instagram platform that it is not an adequate or accurate source of information about orthognathic surgery in its current form.

Analysis of facial soft tissue values and cranial skeletal widths in different body mass index percentile adolescent subjects.

OBJECTIVE: The purpose of this study was to analyze facial soft tissue thickness and cranial skeletal transverse widths in adolescent subjects with different body mass index (BMI) percentiles. METHODS: The 80 subjects were divided into three groups according to BMI percentile: normal-weight, overweight, and obese adolescent subjects. Facial soft tissue linear and cranial skeletal transversal width measurements were performed on lateral and postero-anterior cephalometric radiographs. RESULTS: Glabella, nasion, pogonion, and gnathion soft tissue thicknesses were significantly different among normal-weight, overweight, and obese subjects (p < 0.05). However, other facial soft tissue thickness parameters were not statistically significantly different among the groups (p > 0.05). Moreover, there were no significant differences in cranial skeletal transversal widths among groups (p > 0.05). CONCLUSION: Nasion soft tissue thickness was thicker in overweight subjects; whereas, glabella, pogonion and gnathion soft tissue thickness was thicker in obese subjects. All measured cranial skeletal widths were similar in normal-weight, overweight, and obese subjects.

Effects of different etching methods and bonding procedures on shear bond strength of orthodontic metal brackets applied to different CAD/CAM ceramic materials.

OBJECTIVE: To investigate the shear bond strength (SBS) of orthodontic metal brackets applied to different types of ceramic surfaces treated with different etching procedures and bonding agents. MATERIALS AND METHODS: Monolithic CAD/CAM ceramic specimens (N = 120; n = 40 each group) of feldspathic ceramic Vita Mark II, resin nanoceramic Lava Ultimate, and hybrid ceramic Vita Enamic were fabricated (14 × 12 × 3 mm). Ceramic specimens were separated into four subgroups (n = 10) according to type of surface treatment and bonding onto the ceramic surface. Within each group, four subgroups were prepared by phosphoric acid, hydrofluoric acid, Transbond XT primer, and Clearfill Ceramic primer. Mandibular central incisor metal brackets were bonded with light-cure composite. The SBS data were analyzed using three-way analysis of variance (ANOVA) and Tukey HSD tests. RESULTS: The highest SBS was found in the Vita Enamic group, which is a hybrid ceramic, etched with hydrofluoric acid and applied Transbond XT Adhesive primer (7.28 ± 2.49 MPa). The lowest SBS was found in the Lava Ultimate group, which is a resin nano-ceramic etched with hydrofluoric acid and applied Clearfill ceramic primer (2.20 ± 1.21 MPa). CONCLUSIONS: CAD/CAM material types and bonding procedures affected bond strength ( P < .05), but the etching procedure did not ( P > .05). The use of Transbond XT as a primer bonding agent resulted in higher SBS.

A novel method to accelerate orthodontic tooth movement.

This clinical case report presents fixed orthodontic treatment of a patient with moderately crowded teeth. It was performed with a new technique called 'discision'. Discision method that was described for the first time by the present authors yielded predictable outcomes, and orthodontic treatment was completed in a short period of time. The total duration of orthodontic treatment was 4 months. Class I molar and canine relationships were established at the end of the treatment. Moreover, crowding in the mandible and maxilla was corrected, and optimal overjet and overbite were established. No scar tissue was observed in any gingival region on which discision was performed. The discision technique was developed as a minimally invasive alternative method to piezocision technique, and the authors suggest that this new method yields good outcomes in achieving rapid tooth movement.

Evaluation of palatal rugae pattern in different sagittal skeletal relationship adolescent subjects.

The purpose of this study was to evaluate the morphological structure of palatal rugae in Turkish orthodontic subjects with different sagittal skeletal malocclusions. Orthodontic dental casts of 105 patients (Class I [23 females, 12 males]; 35, Class II [18 females, 17 males]; and 35, Class III [14 females, 21 males] 10-22 years old) were analyzed for rugae patterns. Palatal rugae pattern and number, direction of rugae alignment, shape of incisive papilla were analyzed. Modified Thomas and Kotze classification was performed to analyze palatal rugae characteristics. The data were analyzed using the Kruskal-Wallis test. Wavy and curved types were the most common types of rugae pattern in all groups (Class I, Class II, Class III). As regards to the number of primary and secondary rugae on the left and right sides, there was no statistically significant difference among subjects with different skeletal malocclusions. Droplet-shaped incisive papilla was the most common form of incisive papillae among different skeletal malocclusion groups. The most common palatal rugae were direction type arranged in the horizontal direction. All rugae patterns were unique for each individual. The use of antemortem or postmortem palatal rugae records may facilitate identification of the suspects in forensic investigations by enabling facial reconstruction through skeletal malocclusions.