Treatment Of Maxillary Protrusion Research Articles

A Modified Procedure for Anterior Maxillary Osteotomy.

Anterior maxillary osteotomy is a traditional operation in the treatment of maxillary protrusion. Varies fields about operation have been changed or improved in those years to avoid different kinds of complications. In our study, the authors would present 1 kind of improved anterior maxillary osteotomy surgical method. The study was conducted at the Department of Oral and Maxillofacial Surgery, Guanghua School of Stomatology, Hospital of Stomatology, Guangzhou, Guangdong province. Patients are divided into improved group and general group. Patients after surgery were claimed to have regular return visits. Occlusion, tooth vitalities, postoperative complications would be well evaluated. The operative time, blood losses, complications showed no different at maxillary operation. Our procedure could give much better and direct sight of anterior maxillary bone, and the simplified osteotomy lines could help maxilla move, reduce the times spent on hard tissue cut off or grind. The modified procedure can meet clinical command, improve dentofacial deformities, and gives convenience to surgeon.

Orthodontic treatment of maxillary protrusion with receding mandible and skeletal open bite using a skeletal anchorage system

Orthodontic treatment of maxillary protrusion with receding mandible and skeletal open bite using a skeletal anchorage system

Subapical Anterior Maxillary Segmental Osteotomy

Anterior segmental osteotomy has become an established surgical technique to achieve functional occlusion and improve the facial profile in the treatment of maxillary protrusion. Postoperative nasal changes, however, are somewhat unpredictable. The here presented subapical anterior maxillary segmental osteotomy has been developed to avoid such unintended nasal changes. Thirty-two patients (29 women and 3 men; age range, 18-40 y; mean age, 22 y) with maxillary protrusion underwent subapical anterior maxillary segmental osteotomy. A horizontal osteotomy was carried out between the apices of the anterior teeth and the piriform aperture, maintaining a distance of approximately 2 to 3 mm to the apices. Lateral to both canines, this horizontal osteotomy was connected with vertical osteotomies carried out along the alveolar socket of the first premolar on the right and left sides. Lateral cephalograms and lateral and en face photographs were taken preoperatively and postoperatively for analysis. All patients were followed up for at least 6 months. Significant changes were observed in hard tissue parameters except the anterior nasal spine. The nasal tip, the alar base, and the lip width remain to have no significant change. The ratio of the upper lip to the maxillary incisor retraction was 0.64:1. Whereas both the nasolabial angle and the philtrum length were significantly increased, the protrusion of the upper incisors and the vermilion length presented decreased. The intraoperative and postoperative courses were uneventful during the entire follow-up period. Subapical anterior maxillary segmental osteotomy provides a suitable option in the treatment of maxillary protrusion. It provides improvement of the aesthetic profile without nasal changes.

Treatment of maxillary protrusion in adult with self-tapping micro-screw implants

To investigate the position change of upper molars and incisors in order to evaluate the stability of posterior anchorage with the application of micro-screw implant. Eight adult patients with severe maxillary protrusion were included. Upper first premolars were extracted and upper posterior anchorage was reinforced with micro-screw implant in all patients. Cephalometric and cast analyses were carried out to record the position change of molar and micro-screw. During treatment the micro-screw implants kept stable in sagittal and vertical plane. Neither the mesial-distal movement nor the tipping of the upper molars during the treatment was statistically significant (P > 0.05). The edge of upper incisors was retracted by 6.86 mm and the tipping was reduced by 18.03 degrees . The center of resistance was intruded by 3.28 mm on average. Significant change was observed (P < 0.01). Micro-screw implant could provide good anchorage control in the orthodontic treatment.

Treatment of Maxillary Protrusion with Constriction of the Upper Dentition using a Biteplate

Treatment of Maxillary Protrusion with Constriction of the Upper Dentition using a Biteplate

Treatment of Maxillary Protrusion and Scissors Bite using Removable Appliances -Report of a case-

Treatment of Maxillary Protrusion and Scissors Bite using Removable Appliances -Report of a case-

Changes in lip contour following treatment of maxillary protrusion with esthetic orthodontic appliances.

With the advent of acid etching techniques and the elimination of unesthetic band materials, direct bonding of orthodontic attachments kindled a desire for cosmetic appliances such as labial ceramic brackets and lingual orthodontics. Owing to the esthetic nature of our combination upper-lingual lower-ceramic orthodontic approach, adults who would have normally avoided orthodontic treatment are now seeking treatment. This study evaluated the cephalometric changes in the soft tissue lip profile following treatment of Class II Division 1 malocclusion with upper first bicuspid extractions with our esthetic orthodontic appliance approach. Serial lateral cephalograms (pretreatment and posttreatment) of 16 adult patients with a mean age of 22.1 +/- 3.2 years were studied. The mean upper incisor retraction, upper lip retraction, upper lip lengthening, and lower lip retraction were 5.75 +/- 1.91 mm, 2.8 +/- 1.4 mm, 1.5 +/- 0.6 mm, and 1.4 +/- 0.6 mm, respectively. All these changes were statistically significant (p < 0.01). The nasolabial angle increase of 10.8 +/- 3.0 degrees was also statistically significant (p < 0.01). The upper lip retraction to upper incisor retraction was 1:2.1, while the upper lip lengthening to upper incisor retraction was 1:3.8. The correlation coefficients (r) were 0.91 (p < 0.01) and 0.57 (p < 0.01), respectively. This study shows that significant esthetic changes in lip profile are possible with this cosmetic orthodontic appliance approach. The treatment results in this study appear comparable to those published with labial metal brackets. With very few exceptions, patients were able to adapt within 2 weeks, with almost no trauma to the tongue.

上顎前突症の補綴治療前準備としての歯槽間中隔切除術（Ｄｅａｎ法）

A prosthetic treatment of maxillary protrusion should be indicated, when the patient is old, or anterior teeth of upper jaw cannot be preserved.For many years, removing the external labial of bone was practiced in such a case.However this method has disadvantages of lowering the alveolar ridge and sometimes causing undercuts with passing time, because the postoperative bone resorption is excessive and irregular.We performed intraseptal alveolectomy (Dean's technique) for the prosthetic treatment in 5 cases, and satisfactory results were obtained in all cases.We consider that this technique based on biological princioles has some advantages as follows:1) Postoperative inflamation is slight, because the labial periost and the muscle attachment are not disturbed.2) As the periodontal membrane is preserved, healing is rapid.3) As the labial cortical plates of bone is preserved as a vital onlay bone graft with intact blood supply, postoperative resorption is minimized, and the shape of alveolar ridge is rarely changed.4) This technique lends itself well to immediate denture surgery, and needs no rebase for final denture.5) We can mold the alveolr ridge into the desired contour during operation.6) This technique is a simple dental surgery which can be done in an outpatient room under local anesthesia.

The team approach in the correction of maxillary protrusion

The treatment of maxillary protrusion complicated by congenitally missing teeth, malpositioned teeth, and retained deciduous teeth required the efforts of a general dentist, orthodontist, and oral surgeon.