Background: The relationship between respiratory function and craniofacial morphology has garnered significant attention due to its implications for upper airway and stomatognathic development. Nasal breathing plays a key role in craniofacial growth and dental positioning. This study investigated upper airway morphology and volume differences among individuals with class I, II, and III skeletal anomalies. Methods: Ninety orthodontic patients’ CBCT scans were analyzed to assess the oropharynx and hypopharynx volumes. Skeletal diagnosis was established based on the cephalometric analysis. Results: A significant volume change in the oropharynx and pharynx was demonstrated when comparing class II with class III anomalies (p = 0.0414, p = 0.0313). The total volume of the pharynx was increased in class III anomalies. The area of the narrowest part of the pharynx (MIN-CSA) significantly decreased in classes I and II compared to class III (p = 0.0289, p = 0.0003). Patients with Angle class III anomalies exhibited higher values in the narrowest pharyngeal segment. Gender differences were significant in pharyngeal volumes and morphologies across malocclusion classes. Conclusions: The narrowest segment of the pharynx had the highest values in patients with Angle class III. The volume of the oropharynx was found to be greater in patients with Angle class III versus patients with Angle class II.

Background: For years, there has been a long debate about the impact of orthodontic treatment on the periodontium of patients. Therefore, it is important to understand the effects of orthodontic forces on the periodontium. The objective of this study was to evaluate the height of the alveolar bone at the four surfaces of specific teeth and the root length of the central incisors before and after orthodontic treatment. Materials and Methods: CBCTs from a group of fifty patients were evaluated before (T0) and after orthodontic treatment (T1). Evaluations of the alveolar bone were performed by measuring the distance from the most apical point of the marginal portion to the CEJ at the buccal (B-ABL), lingual (L-ABL), mesial (M-ABL), and distal (D-ABL) surfaces of the central incisor (CI), first premolar (1st PM), and first molar (1st M). Meanwhile, root resorptions were evaluated by measuring the distance from the center of the tooth at the CEJ to the most apical point of the central incisor. Results: The reduction in the alveolar bone level was highest at the buccal segment (75%) and lowest at the distal (42%) segment, although the decrease was not statistically significant. Root resorption, in terms of reduction in the total length, was detected in the upper central incisor. Conclusions: Fixed orthodontic treatment can produce a significant reduction in root length, but not at the level of the alveolar bone.

Background/Objectives: Anterior dental trauma in adolescents presents complex restorative challenges due to ongoing craniofacial development and high aesthetic expectations. This study evaluated the long-term clinical performance of feldspathic ceramic veneers and lithium disilicate crowns used in the anterior region following dental trauma in adolescents. Methods: A total of 209 restorations were placed in 85 adolescents (50 females, 35 males), aged 11.1–17.9 years (mean age: 15.1 years). Of these, 144 were lithium disilicate crowns, and 65 were feldspathic ceramic veneers. All restorations were fabricated using minimally invasive protocols and followed up for periods ranging from 3 to 60 months. Outcomes were assessed based on standardized clinical criteria for success and failure. Results: Lithium disilicate crowns exhibited superior long-term performance, with the majority of failures occurring in feldspathic veneers (p < 0.001), primarily due to chipping or structural fracture. Age and gender had no statistically significant influence on failure rates. Conclusions: Both feldspathic and lithium disilicate ceramic restorations represent viable treatment options for anterior dental trauma in adolescents. However, lithium disilicate demonstrates greater mechanical reliability, particularly in teeth with significant hard tissue loss. These results support the use of durable ceramic materials in adolescent restorative protocols involving dental trauma.

This case report details the clinical use of layered lithium disilicate crowns, employing a customized technique that combines a modified chamfer on the vestibular surface with Vertical-Prep on the lingual surface. This concept was applied on six mandibular anterior teeth (4. 1, 4. 2, 4. 3, 3. 1, 3. 2, 3. 3) trying to achieve mechanical advantage of the vertical preparations alongside the aesthetic accomplishment of the modified chamfer technique. The lithium disilicate material used was characterized by high strength and biologic characteristics of the material made it possible to achieve highly satisfactory esthetic result with the color near to the patient’s original teeth. In terms of function, the restorations provided good stability and comfort to the patients and none of the patients complained any discomfort in the six-year follow up period. Both the crowns were proved to have long term sturdiness with out any fractures or wearing and thus this treatment modality can be held as successful outcome. This case also supports the concept of having a well-developed mode of preparation in tandem with using high quality ceramics in the creation of durable, esthetical dental restorations.

This case report describes the use of a minimally invasive approach to the anterior dentition using feldspathic ceramic veneers with two axes of insertion. It was developed to restore as much of the hard structures of teeth as possible while at the same time giving the best esthetic outcome. Unlike other types of veneers that require extensive changes to the tooth shape due to single-axis placement, the technique presented allows for two axes of insertion. This approach enables minimal preparation and preserves most of the tooth structure. The veneers were applied on both maxillary and mandibular anterior teeth and additional six years follow up did not show any sign of fractures, debonding or marginal degradation hence proving the long-term success of this concept. The case highlights the significance of rigorous bonding sequence and the particularity of the fabrication process to achieve long-term outcome stability of the restorations. This work further confirms the applicability of double veneer technique as a reliable option for patients who desire change in their teeth appearance but without undergoing surgical procedures, but more research needs to be done with respect to its versatility in dentistry.