Aim: To compare apical root resorption and alveolar bone changes induced by the maxillary canine closure procedure performed on patients with Angle Class I malocclusion using NiTi closed-coil springs versus elastomeric chains. Materials and Methods: Thirty-one adult patients who had been instructed to undergo bilateral maxillary first premolar extraction completed a randomized clinical trial split-mouth study with a double-blind design. Elastomeric chains will be used on the left side, and NiTi closed-coil springs will be used on the right side for patients with even numbers. Elastomeric chains will be used on the right side of patients with an odd number, whereas NiTi closed-coil springs will be used on the left side of patients. For each patient, cone-beam computed tomography of the maxillary canine and lateral cephalometric radiographs were carried out before and after treatment to evaluate apical root resorption and perform cephalometric measurements. Result: The tooth root length decreased by 0.90 ± 0.60 mm in the NiTi closed-coil spring group. The alveolar bone level increased by 0.53 ± 0.66 mm on the buccal side and by 0.79 ± 0.72 mm on the lingual side. These changes were statistically significant (P < 0.001). In the elastomeric chain group, the tooth root length was decreased by 0.92 ± 0.69 mm, and the levels of vertical buccal and lingual alveolar bone increased significantly (P < 0.001). Compared to NiTi closed-coil springs and elastomeric chain groups, there was a 0.03 ± 0.878 mm difference in the tooth root length; however, this difference was not statistically significant (P = 0.878). Conclusion: Elastomeric chains and NiTi closed-coil springs both generated tooth root resorption, but the results were comparable and the difference was not statistically significant. There was no statistically significant difference between the elastomeric chain and NiTi closed-coil spring groups regarding the changes in alveolar bone loss around the maxillary canines.

Objective: This study aimed to evaluate the effectiveness of injectable platelet-rich fibrin (i-PRF) in root resorption and alveolar bone density. Methods: This study was a split-mouth randomized clinical trial that included 31 patients (9 males and 22 females, ages ranging from 15-25 years) treated for Class I malocclusion with the indicated extraction of the maxillary first premolar. After the first stage of the procedure, 150 gm of force was applied to the maxillary canine. Before the canine retraction, i-PRF was prepared from each patient's blood and then injected into the buccal and palatal aspects of the extraction sites. For each patient, Cone Beam Computed Tomography (CBCT) of the maxillary canine was taken before and after treatment (T1 and T4) to evaluate root resorption and bone density. Results: A decrease in canine root length was recorded in both groups after canine retraction (p0.05). The total alveolar bone level increased by 0.59±1.28 mm on the buccal side. These changes were statistically significant (p <0.05). Conclusion: In this study, root resorption and alveolar bone loss were reported around the maxillary canines in both groups, i-PRF and the control. However, the difference was not statistically significant. Alveolar bone changes during orthodontic treatment were found to be small and low-risk. Clinical Trial Registration Number: This study was registered at Clinicaltrials.gov with an identifier number: NCT06634888.

This study aimed to evaluate the impact of a combination of immediate implant placement with maxillary sinus augmentation (MSA) solely using platelet-rich fibrin (PRF) on guided bone regeneration. An interventional before-after (pre-post) study design was used with 30 dental patients (≥18 years of age; 14 males and 16 females) with initial bone heights ranging between 4 and 6 mm. Following the general check-up and the creation of a study model, the planned implant location demonstrated an external right maxilla diameter of more than 5 mm, thereby validating the cone-beam computed tomography (CBCT) radiograph. The next step is the sinus lift operation, followed by the placement of dental implants. Production of PRF: 30 mL of venous blood was extracted and separated into three layers. The PRF was inserted into the space formed by the sinus floor and sinus membrane, and the flap was secured. The procedure involved creating an opening in the bone, separating the sinus membrane from the sinus floor, and making holes for implant insertion. The primary stability of the implant was assessed using an ISQ measurement device. Cone-beam computed tomography scans were taken and compared preoperatively, 6 months postoperatively, and follow-up assessments after 3 days, 7 days, and 6 months. And showed initial stability, pain, infection, blood bruises, peri-implant inflammation, osseointegration, bone loss around the implant, changes in bone thickness and sinus mucosa, and problems during the procedure. The Chi-squared test tested initial stability, whereas the paired sample t-test analyzed bone width and height changes. The study assessed the initial stability of a dental implant using bone density, with bones classified as D2 showing the strongest stability (76.7%). Three days after surgery, 26.7% of patients experienced mild pain, which decreased to 6.7% after 7 days. Six months later, the implant site showed no pain, no inflammation, and no bone loss. The ISQ was greater than 70, indicating strong integration with the surrounding bone. The thickness of the sinus membrane mucosa and alveolar bone changed significantly, with a significant difference (p < 0.05) in breadth and height. Sinus membrane perforation, hemorrhage, and flap tear were observed at a rate of 16.7%. Exclusively using PRF was highly effective in augmenting the bone level during maxillary sinus lift surgery (MSA), especially for immediate implant-supported rehabilitation purposes. This study highlights the significance of using PRF to promote healing and enhance the thickness of bone in MSA without a bone graft in immediate implant placement. How to cite this article: Nguyen XT, Le LN, Do TT, et al. Increasing Bone Regeneration in Maxillary Sinus Augmentation Using Platelet-rich Fibrin: An Interventional Pre-Post Study. J Contemp Dent Pract 2024;25(9):814-819.

Aim: This study aimed to determine the relationship between malocclusion and deleterious oral habits in the Vietnamese children aged 8–12 years. Materials and Methods: A cross-sectional descriptive analysis was undertaken on a total of 434 children (8–12 years old, 208 males and 226 females), separated into five age groups: 8 years old (16.8%), 9 years old (18.5%), 10 years old (20.7%), 11 years old (21.4%), and 12 years old (22.6%), with all four first permanent molars erupted, no previous orthodontic treatment, loss of the second primary molar or presence of the second primary molar root or decay, loss of surface material on the second primary molar, and underfilling of the second primary molar size in the mesiodistal direction. The deleterious oral habits and malocclusion were assessed through a clinical examination and questionnaires for parents. The descriptive statistical analysis revealed the following findings: mean and standard deviation. The chi-squared test and Fisher’s exact test were used to compare categorical variables. The data were considered significant at P < 0.05. Result: Deleterious oral habits were found to have a significant relationship with malocclusion. Mouth breathing habits were associated with anterior open bites (P < 0.05). The tongue thrusting habit was associated with anterior open bite (P < 0.05), posterior crossbite (P < 0.01), overbite greater than 4 mm (P < 0.01), and angle class I malocclusion (P < 0.05). Chewing habits on one side were associated with posterior crossbite (P < 0.01) and posterior open bite (P < 0.05). The habit of pen/pencil/nail biting was associated with midline deviation (P < 0.05). As children got older, there was a greater need for orthodontic treatment for dental healthcare, according to the index of orthodontic treatment need. In the 8-year-old patient group, the need was 4.1%; in the 9-year-old patient group, it was 5%; in the 10-year-old patient group, it was 9%; in the 11-year-old patient group, it was 19.4%; and in the 12-year-old patient group, it was 22.4%. The distribution of orthodontic treatment needs for dental health was significantly different based on the number of deleterious oral habits children had (P < 0.01). Conclusion: Abnormal oral habits were prevalent in about 30.6% of the study participants. Mouth breathing, tongue thrusting, pen/pencil/nail biting, and one-side chewing had a significant impact on malocclusion.

Introduction: One of the most difficult types of malocclusion to cure is Class III malocclusion. Maxillary protraction is a common component of orthodontic/surgical treatments for Class III individuals since maxillary retrognathia is the primary factor contributing to their condition. Objective: A Vietnamese girl of 16 years old presented with severe symptoms of anterior crossbite and Class III malocclusion of the skeletal and dental structures. Among the dental characteristics were a prognathic mandible, retrognathic maxilla, and proclined lower incisors. The medical history revealed no abnormalities. Methods: Since the patient refused to undergo orthognathic surgery, we suggested using multiloop edgewise archwire (MEAW), which combines temporary anchorage devices (TADs) with modified Class III elastics for camouflage treatment of Class III malocclusion. Results: This case illustrated the use of TADs. MEAW combines TADs with modified Class III elastics for camouflage therapy. It is a potentially effective treatment option for adolescents diagnosed with Class III skeletal malocclusion.