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한부석,김형돈,이원유 대한치과교정학회 1992 대한치과교정학회지 Vol.22 No.4
Orthodontists want why the patients want orthodontic treatment. Demand and need for orthodontics is very important factors of cooperation and management. Chief complaint would be different according to the race and culture. Our results show that in the control group, Korean female adolescents[ chief complaint is cowding(30.6%), spacing(26.5%), upper anterior protrusion(18.4%), anterior cross bite(8.2%) in order. Korean female adolescents considered anterior cross bite is more nonacceptable than spacing and anterior protrusion. The purpose of orthodontics seemed to enhance esthetic, dental health, and to improve oral function.
장지철,김형돈,한부석,이원유 대한치과교정학회 1991 대한치과교정학회지 Vol.21 No.3
To study the possibility of attraction magnetic forces to expand maxillary arch, we used 2 big adult dogs, 2 small puppies, 1 small adult dog as experiments, and 1 small adult dog as a control. We measured the intercanine width and intermolar width and histologically observed in the suture and cervical and apex region of teeth and took occlusal X-rays to observe separation of suture line in the maxila. The results were as follows: 1.Expansion velocities of intercanine(0.25mm/day) and intermolar widths(0.23mm/day) in puppies were faster than those(0.135mm/day, 0.09mm/day) in adults. 2.In all experiments in adults (0.135mm/day) and puppies(0.25mm/day), expansion velocity of intercanine widths were faster than those(0.09mm/day, 0.23mm/day) of intermolar width. 3.In all experiments ectatic changes were observed and cellularities of fibroblast increased in the suture line. Only in adults dogs the separations of palatal suture were observed in the occlusal X-ray view. 4.In the puppies bony deposition was particularly observed in the suture line and micro-bony fragments were often observed. 5.In the all experiments no root resorption was observed in the cervical and root area, but normal root resorption due to eruption of permanent teeth was observed in the puppies.
이원유,장지철,김형돈,한부석,Lee, Won You,Jang, Ji Cheul,Kim, Hyoung Don,Han, Bu Seuk 대한치과교정학회 1991 대한치과교정학회지 Vol.21 No.3
To study the possibility of attraction magnetic forces to expand maxillary arch, we used 2 big adult dogs, 2 small puppies, 1 small adult dog as experiments, and 1 small adult dog as a control. We measured the intercanine width and intermolar width and histologically observed in the suture and cervical and apex region of teeth and took occlusal X-rays to observe separation of suture line in the maxilla. The results were as follows: 1. Expansion velocities of intercanine (0.25mm/day) and intermolar widths (0.23mm/day) in puppies were faster than those (0.135mm/day, 0.09mm/day) in adults. 2. In all experiments in adults (0.135mm/day) and puppies (0.25mm/day), expansion velocity of intercanine widths were faster than those (0.09mm/day, 0.23mm/day) of intermolar width. 3. In all experiments ectatic changes were observed and cellularities of fibroblast increased in the suture line. Only in adults dogs the separations of palatal suture were observed in the occlusal X-ray view. 4. In the puppies bony deposition was particularly observed in the suture line and micro-bony fragments were often observed. 5. In the all experiments no root resorption was observed in the cervical and root area, but normal root resorption due to eruption of permanent teeth was observed in the puppies.