Vol.30-3-4 September 2018
Clinical Use of Contemporary Clear Aligner Therapy
Clear aligner therapy (CAT) is an increasing popular alternative to conventional bracket therapy. This review summarized contemporary data regarding the history of CAT. The information regarding the advantages and disadvantages of CAT, biomechanical force and biological considerations, controlling orthodontic tooth movement (OTM) would be discussed in this review. The CAT is well accepted for their esthetics, comfort, good care of oral hygiene and periodontal status and suitable for interdisciplinary dental treatment. However, CAT was also considered as difficult compliance for the patients, uneasy to be handled by clinicians, unprecise root movement, difficult for the postoperative fixation in cases receiving orthognathic surgery, and high cost.
Curve of Spee: Development and Orthodontic Leveling
Yu-Hsin Lee, Yu-Chuan Tseng
Curve of Spee (CoS) is characterized as human occlusal curvature viewed in the sagittal plane. This naturally occurring phenomenon has clinical importance in orthodontics and prosthodontic dentistry. The purpose of this article is to examine the formation of the CoS regarding of when, how, or why the CoS develops. The mechanism of leveling the CoS was discussed.
Vol.30-3-5 September 2018
Surgical-orthodontic Treatment for a Patient with Skeletal Class III Deformity and Anterior Open Bite
Anterior open bite is a complicated problem due to its multiple etiologies, including anatomical, environmental, and genetic factors. The complexity of skeletal class III deformity depends on the severity of bony discrepancy, especially with anterior open bite. Surgical-orthodontic treatment is often required for complete correction.
Correction of Bimaxillary Protrusion by Extraction of Incisors and Canine Substitution
Chung-Li Wang, Chun-Liang Kuo, I-Hua Liu, Chun-Hsiu Yang
The maxillary six anterior teeth play important roles in esthetics and functions. Treatments for missing maxillary lateral incisors either by space closure or space preservation need multiple clinical considerations. This case report presents an orthodontic treatment of a 33-year-old female patient who had a convex profile with lip incompetence, missing lower molars and poor prognosis of bilateral maxillary lateral incisors. The atypical extraction in treatment plan consisted of removing lateral incisors instead of premolars to retract the anterior teeth. The improvement of facial profile and lip posture was achieved and the anterior teeth esthetics was further rehabilitated with prosthesis. After 28-month of treatment duration, the patient was satisfied with treatment results.
Vol.30-3-6 September 2018
Use Improved Super-elastic Ti-Ni Alloy Wire to Correct Class II Division 2 Malocclusion with Unstable Mandibular Position
The case reported the use of improved super-elastic Ti-Ni alloy wire (ISW), which was developed by Tokyo Medical and Dental University, to correct a case of Angle Class II division 2 case with unstable mandibular position. An adult 28-year old women came to our clinic with a chief complaint of poor dental alignment. Clinical examination revealed a Class II division 2 malocclusion. The ISW was used to relieve the anterior deep bite and crowding. Intermaxillary elastics (IMEs) were also used to achieve a correct and stable mandibular position and solid interdigitation. The outcome indicated achievement in correction of arch coordination, space management and bite control. In this case, poor dental alignment was rapidly leveled by using ISW. ISW could provide an efficient multidimensional control of this particular malocclusion. After the treatment, the treatment goals were achieved and the patient was pleased with the treatment result.
Considerations on Facial Growth and Oral Function with the use of High Pull Headgear
Shao-Chun Yang, Ming-Jeaun Su, Yuen-Yung Tsang, Huei-Mei Tsai
High pull headgear with face bow has been a popular treatment modality for upper first molars distalization and anchorage enhancement. It can effectively stop the eruption of upper molars, allow condylar growth to contribute a forward movement of the mandible and further improve the bite and lip incompetency. The compliance from patients is particularly important to growing children.
The patient was an 11 years old boy with symptoms of Class II division 1 malocclusion. Patient’s growth spurt seemed to be not over for at least one year. Lip biting and thumb sucking habits were suspected as the causes of patient’s malocclusion. A combination of anterior bite turbo, which is a convenient alternative for a bite plate, pre-adjusted appliances and high pull headgear were applied. Lip training exercise was equally indispensable. Steady occlusion was achieved. Soft tissue profile improvement and oral function recovery were also satisfactory.
Vol. 31-2-1 June 2019
The Effects of Low Intensity Light Emitted Diode on Human Periodontal Ligament Cell and Mouse Cementoblast Cell Line
Yu-Ting Wu, Yun-Ting Huang, Chun-Yu Chen, Chien-Wei Chao, Chia Tze Kao
The prevention of external root resorption caused by orthodontic tooth movement was endeavored by many researches. The photobiomodulation with low level dose light emitted diode (LED) is reported. The purpose of this study was to investigate the LED effects on the OCCM-30 and PDL cells proliferation.