Orthodontics and Dentofacial Orthopedics

Directory: AAO Officers and Organizations Publication date: April 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 155, Issue 4 Author(s):

Raymond George Sr, 1939-2018 Publication date: April 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 155, Issue 4 Author(s): Perry Opin

Eldon Dean Bills, 1931-2018 Publication date: April 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 155, Issue 4 Author(s): James L. Vaden, Michael L. Riolo

April 2019:155(4) Publication date: April 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 155, Issue 4 Author(s): Allen H. Moffitt

Searching the literature for studies for a systematic review. Part 3: Using controlled vocabulary Publication date: April 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 155, Issue 4 Author(s): Anne Littlewood, Dimitrios Kloukos

Doctors yes, assistants no Publication date: April 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 155, Issue 4 Author(s): Laurance Jerrold

Evaluation of fit for 3D-printed retainers compared with thermoform retainers Publication date: April 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 155, Issue 4 Author(s): David Cole, Sompop Bencharit, Caroline K. Carrico, Andrew Arias, Eser Tüfekçi Introduction In the literature, there is little information available on 3D-printed orthodontic retainers. This study examined the accuracy of 3D-printed retainers compared with conventional vacuum-formed and commercially available vacuum-formed retainers. Methods Three reference models (models 1, 2, and 3) were used to fabricate traditional vacuum-formed, commercially available vacuum-formed, and 3D-printed retainers. For each model, retainers were made using the 3 methods (a total of 27 retainers). To determine the trueness, ie, closeness of a model to a true model, the distance between the retainer and its digital model at reference points were calculated with the use of engineering software. The measurements were reported as average absolute observed values and compared with those of the conventional vacuum-formed retainers. Results Average differences of the conventional vacuum-formed retainers ranged from 0.10 to 0.20 mm. The commercially available and 3D-printed retainers had ranges of 0.10 to 0.30 mm and 0.10 to 0.40 mm, respectively. Conclusions The conventional vacuum-formed retainers showed the least amount of deviation from the original reference models and the 3D-printed retainers showed the greatest deviation. However, all 3 methods yielded measurements within 0.5 mm, which has previously been accepted to be clinically sufficient.

A novel 3D-printed computer-assisted piezocision guide for surgically facilitated orthodontics Publication date: April 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 155, Issue 4 Author(s): Hsin-Yu Hou, Chung-Hsing Li, Min-Chia Chen, Pei-Yi Lin, Wei-Chung Liu, Yi-Wen Cathy Tsai, Ren-Yeong Huang Surgical interventions on the alveolar ridges aimed at facilitating orthodontic tooth movement have been extensively reported. However, unexpected events or complications still occur in daily practice. The purpose of this report was to present a novel 3-dimensional (3D) computer-assisted piezocision guide (CAPG) designed to be translucent for increased visibility, rigid for enhanced support during guidance, and porous for profuse irrigation during procedure. Such a design can function to minimize the risk of surgical complications. In this case, we present a novel 3D-printed CAPG to facilitate a minimally invasive periodontal accelerated osteogenic orthodontics (PAOO) procedure with a guide that provides accuracy, adequate visibility, and greater access for the coolant to reach the surgery site. By navigating the cone-beam computed tomography data, we precisely know the cortical bone thickness, root direction, and interrelations between anatomic structures in an individual situation, which allows us to design our cutting slot for the required length and depth according to the operator's knowledge. Finally, 3D printing was applied, transferring our surgical plan to fabricate the CAPG. Moreover, the well designed pores on the CAPG allow effective irrigation during the piezocision procedure. This minimally invasive procedure was uneventful, and no devitalized tooth or alveolar bone was found.

Treatment of a severe Class II Division 1 malocclusion combined with surgical miniscrew anchorage Publication date: April 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 155, Issue 4 Author(s): Poonsak Pisek, Montian Manosudprasit, Tasanee Wangsrimongkol, Chutimaporn Keinprasit, Raweewan Wongpetch This article reports the camouflage treatment of a female patient, aged 15 years 2 months, who had a Class II Division 1 malocclusion with severe anterior protrusion and deep incisor overbite. The camouflage treatment plan included bilateral extraction of the maxillary first premolars combined with the use of temporary anchorage devices (TADs) and tension coil springs to retract canines into the extraction spaces and then the 4 incisors. The treatment included use of a mandibular fixed labial arch with minimal use of Class II elastics to correct mild mandibular spacing and level the curve of Spee. Ideal overjet and overbite relationships were established, and the final result was well balanced and esthetically pleasing. The molars were finished in a Class II relationship. Total treatment time was 2 years 6 months. Cephalometric superimpositions revealed that mandibular molars were not disturbed by the limited use of Class II elastics. Surgical miniscrews in canine and incisor retraction in Class II Division 1 malocclusion are an alternate type of temporary anchorage that reduce or remove reliance on conventional intermaxillary anchorage.

A comprehensive treatment approach for idiopathic condylar resorption and anterior open bite with 3D virtual surgical planning and self-ligated customized lingual appliance Publication date: April 2019 Source: American Journal of Orthodontics and Dentofacial Orthopedics, Volume 155, Issue 4 Author(s): Farhana Rahman, Ahmet Arif Celebi, Patrick J. Louis, Chung How Kau Introduction We report the successful treatment of a 38-year-old woman with bilateral idiopathic condylar resorption and anterior open bite. She had incompetent lips, a gummy smile, increased lower facial height, high mandibular plane angle, skeletal and dental Class II malocclusion with mild mandibular crowding, increased overjet, and mandibular midline deviation to the right. Methods The treatment plan included: (1) presurgical alignment and leveling of the teeth in both arches; (2) jaw motion tracking (JMT) to detect mandibular movement; (3) 3-piece maxillary osteotomies with mandibular reconstruction and bilateral coronoidectomies; and (4) postsurgical correction of the malocclusion. The orthodontic treatment was performed with the use of custom lingual braces and clear brackets and the orthognathic surgery was planned with the use of virtual surgical planning. Results The idiopathic condylar resorption and anterior open bite were treated, crowding was eliminated in the lower anterior segment, correction of skeletal and dental Class II malocclusion was obtained, mandibular plane angle was reduced, and facial profile improved. Conclusions The results suggest that esthetic and functional results can be achieved with the cooperation of 2 specialties and with the use of state-of-the-art technology.