Directory: AAO Officers and Organizations Publication date: September 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 156, Issue 3 Author(s):

September 2019:156(3) Publication date: September 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 156, Issue 3 Author(s): Allen H. Moffitt

The ortho-perio patient: Clinical evidence and therapeutic guidelines Publication date: September 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 156, Issue 3 Author(s): Greg Huang

Putting something to rest Publication date: September 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 156, Issue 3 Author(s): Laurance Jerrold

Accuracy of Dental Monitoring 3D digital dental models using photograph and video mode Publication date: September 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 156, Issue 3 Author(s): Ryan S. Morris, Lauren N. Hoye, Mohammed H. Elnagar, Phimon Atsawasuwan, Maria Therese Galang-Boquiren, Jennifer Caplin, Grace Costa Viana, Ales Obrez, Budi Kusnoto Introduction This study aimed to test the accuracy of the 3-dimensional (3D) digital dental models generated by the Dental Monitoring (DM) smartphone application in both photograph and video modes over successive DM examinations in comparison with 3D digital dental models generated by the iTero Element intraoral scanner. Methods Ten typodonts with setups of class I malocclusion and comparable severity of anterior crowding were used in the study. iTero Element scans along with DM examination in photograph and video modes were performed before tooth movement and after each set of 10 Invisalign aligners for each typodont. Stereolithography (STL) files generated from the DM examinations in photograph and video modes were superimposed with the STL files from the iTero scans using GOM Inspect software to determine the accuracy of both photograph and video modes of DM technology. Results No clinically significant differences, according to the American Board of Orthodontics–determined standards, were found. Mean global deviations for the maxillary arch ranged from 0.00149 to 0.02756 mm in photograph mode and from 0.0148 to 0.0256 mm in video mode. Mean global deviations for the mandibular arch ranged from 0.0164 to 0.0275 mm in photograph mode and from 0.0150 to 0.0264 mm in video mode. Statistically significant differences were found between the 3D models generated by the iTero and the DM application in photograph and video modes over successive DM examinations. Conclusions 3D digital dental models generated by the DM smartphone application in photograph and video modes are accurate enough to be used for clinical applications.

Presurgical nasoalveolar molding with 3D printing for a patient with unilateral cleft lip, alveolus, and palate Publication date: September 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 156, Issue 3 Author(s): Jie Zheng, Hong He, Wenying Kuang, Wenjun Yuan An 8-day-old male infant with unilateral cleft lip, alveolus, and palate had a wide alveolar defect, soft tissue deformity, and a markedly sunken nasal wing at the cleft side. The patient was treated with a series of 3D-printed molding plates and synchronously with a nasal hook. The cleft edges moved closer by 9 mm at the alveolar ridge and the nasal wing was lifted considerably. Split-type 3D printing of presurgical nasoalveolar molding helped to reduce the cleft gap, improve the arch form, approximate lip segments, and distinctly improve the morphology of the nose by correcting the flattened nasal wings.

Multidisciplinary treatment with a customized lingual appliance for an adult patient with severe Class III malocclusion and multiple missing teeth Publication date: September 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 156, Issue 3 Author(s): Mariano Gallone, Massimo Robiony, Daniele Bordonali, Giovanni Bruno, Alberto De Stefani, Antonio Gracco A 24-year-old man presented with a severe skeletal class III malocclusion, associated with an anterior and posterior crossbite in the left side, upper and lower lip eversion, skeletal asymmetry, midline discrepancy, diastemas in the maxillary and mandibular dental arches, and agenesis of maxillary lateral incisors and canines with retained deciduous teeth. Treatment was performed with the use of the Win Lingual System. When the 0.016 × 0.022-inch NiTi archiwire was applied, the deciduous teeth were extracted and replaced with temporary crowns connected to the appliance. After the aligning, leveling, and diastema closure phases, a modified Le Fort II osteotomy, a mandibular setback with a bilateral sagittal split osteotomy and a genioplasty were performed. Implants were placed in the canine site through a flapless guided surgery, and cantilevered temporary bridges were delivered. Final prosthetic rehabilitation included veneers for the central incisors and zirconia-ceramic cantilevered bridges for the canine and lateral incisors. After 36 months of active treatment, the patient showed an Angle Class I molar and canine relationship and an ideal overbite and overjet. His profile had improved, lips were competent, and gingival levels were acceptable. The lateral radiograph and cephalometric analysis showed a good balance of the skeletal pattern, a good profile of the soft tissue, and proper inclinations of the maxillary and mandibular incisors in relation to maxilla and mandible. After 2 years of follow-up, the patient had a pleasant smile and no relapse, or joint or muscular pain.

Influence of maxillary canine impaction characteristics and factors associated with orthodontic treatment on the duration of active orthodontic traction Publication date: September 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 156, Issue 3 Author(s): Luis Ernesto Arriola-Guillén, Aron Aliaga–Del Castillo, Gustavo Armando Ruíz-Mora, Yalil Augusto Rodríguez-Cárdenas, Heraldo Luis Dias–Da Silveira Introduction Orthodontic traction of a maxillary impacted canine (MIC) increases the orthodontic treatment time. Therefore, the objective of this study was to evaluate the influence of MIC characteristics and factors associated with orthodontic treatment on the duration of active orthodontic traction. Methods This follow-up and retrospective study included 45 MICs orthodontically tractioned into the occlusal plane with the use of a standardized protocol. MIC characteristics, including type, sector, side, location, height, and complexity of impaction, as well as α and β angles and canine root length and area were measured. Likewise, factors associated with orthodontic treatment, including sex, age, malocclusion, premolar extractions, previous incisor root resorption, ANB, APDI, and SNA angles, and PNS-ANS distance were also evaluated. The statistical analysis included multiple linear regressions to estimate the influence of all variables on the duration of traction (α = 0.05). Results Sex had significant influence (P = 0.027) on the time of traction; in female patients, the time was 2.05 months more than in male patients. Bilateral impaction treatment increased the time by 2.74 months compared with unilateral cases (P = 0.001). Traction of bicortically centered impacted canines increased the duration of traction by 2.85 months (P = 0.001). Finally, the traction time increased in 2.35 months (P = 0.046) when the impaction sectors were 4 or 5 (close to the midline). Conclusions The duration of active orthodontic traction of MIC is mainly influenced by sex, bilateral type, bicortically centered location, or when MIC is located in sector 4 or 5 close to midline, increasing the traction time by some months.

A longitudinal comparison of body height growth of orthodontically treated Class I and Class III adolescents compared with the general population Publication date: September 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 156, Issue 3 Author(s): Soonshin Hwang, Woowon Jang, Yoon Jeong Choi, Chooryung J. Chung, Kyung-Ho Kim Introduction The aim of this study was to evaluate the height growth of Class I and III orthodontic patients according to the Fishman skeletal maturation index (SMI) and to compare it with that of a general population. Methods The study sample included 81 Class I and 71 Class III adolescents who had height measurements and hand-wrist radiographs taken annually and categorized according to SMI. Height completion rate, residual height, height increase per sequential SMI stage, and height velocity were analyzed. Sex differences were evaluated and comparisons between Class I and Class III groups were made. In addition, the height of orthodontic patients was indirectly compared with that of the general population. Results In boys and girls, height completion rate was >90% at SMI 6, residual height was fewer than 10 cm at SMI 7, and height increase per sequential SMI stage was greatest from SMI 6 to SMI 7. Height velocity was greatest from SMI 5 to SMI 6 in boys and from SMI 4 to SMI 5 in girls. Conclusions There was no significant difference in body height parameters for all SMI stages between Class I and Class III adolescents. Adolescents who had orthodontic treatment were not shorter in stature at growth completion compared with the general population.

Outcomes of early versus late treatment of severe Class II high-angle patients Publication date: September 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 156, Issue 3 Author(s): Jung-Yul Cha, David B. Kennedy, Patrick K. Turley, Donald R. Joondeph, Hyung-Seon Baik, Chung-Ju Hwang, Peter M. Sinclair Introduction The aim of this work was to compare the skeletal and dental outcomes of 1- versus 2-phase treatment in Class II subjects with difficult-to-treat high-angle severe Class II malocclusions. Methods The sample of 120 cases was collected from the private offices of 3 experienced clinicians. The following selection criteria were used: (1) ANB ≥6°, (2) SN-GoGn ≥37° or mandibular plane to Frankfort horizontal plane ≥30°; and (3) overjet ≥6 mm. Patients were classified into either the early or the late treatment group according to dental age (early Tx: ≥5 primary teeth; late Tx: otherwise). Thirty-four angular, linear, and proportional measurements were determined for each patient. Statistical significance was assessed with the use of a 2-tailed t test, analysis of covariance test, and chi-square test. Results The results showed that early 2-phase treatment for severe Class II high-angle patients offered no skeletal anteroposterior advantages over late 1-phase treatment. Severe high-angle Class II patients also showed similar dental anteroposterior outcomes with the use of both approaches. Vertically there was a higher frequency of increased mandibular plane angles and extrusion of upper incisors and lower molars in the late treatment group. Conclusions Early 2-phase treatment for severe Class II high-angle patients offered no skeletal or dental advantage over late 1-phase treatment.