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At least 109 records · Page 6Linked to original sources
PubMed1992

Surgical versus orthodontic correction of skeletal Class II malocclusion in adolescents: effects and indications.

To clarify the effects of orthodontic versus surgical treatment and to distinguish more clearly those Class II patients who can be treated successfully with orthodontics alone, we compared three groups of adolescents: forty patients treated successfully with orthognathic surgery, 40 patients treated successfully with orthodontics alone, and 21 patients whose orthodontic treatment was judged to be unsuccessful. Successful surgical treatment was accomplished largely by bringing the mandible forward, but this involved vertically repositioning the maxilla, alone or in combination with advancing the mandible, in 40% of the patients. Successful orthodontic treatment resulted from a combination of retraction of the maxillary incisors and protraction of the mandibular incisors; most of the successfully treated group also had significant vertical growth, and 40% had greater than 2 mm anteroposterior growth. The unsuccessfully treated orthodontic patients initially had greater overjet, more severe mandibular deficiency, and greater anterior facial height than those treated successfully; they also had less retraction of the maxillary incisors and less growth during treatment. In Class II adolescents beyond the growth spurt, surgery is likely to be needed for successful correction of the malocclusion if the overjet is greater than 10 mm, especially if the distance from pogonion to nasion perpendicular is 18 mm or more, mandibular body length is less than 70 mm, or facial height is greater than 125 mm.

Adolescent↗
PubMed1976

Comparison of two surgical methods in combined surgical-orthodontic correction of impacted maxillary canines.

The post-treatment periodontal condition of impacted maxillary canines was examined in two groups of patients. In one group (n =34) the teeth were exposed in the mouth after removal of the bone and soft tissue covering of the crown. In the other group (n =22) the bone covering the crown was removed, whereafter the mucoperiosteal flap was sutured back. In both groups the orthodontic treatment procedures were basically the same. The mean treatment duration was 18 months after radical surgical exposure and 22 months after moderate surgical exposure. The teeth were examined 1-2 years after removal of the fixed appliances. Oral hygiene and gingival inflammation were approximately the same in both groups. The palatal pocket was deeper on teeth subjected to moderate surgical exposure, and the depth also varied more. The loss of fiber attachment was not significantly different except on the palatal surface, where it was greater after radical exposure and also varied more. The interdental bone height, which was measured on radiographs, varied more after radical than after moderate surgical exposure.

Adolescent↗
PubMed1999

Surgical versus orthodontic correction for Class II patients: age and severity in treatment planning and treatment outcome.

Treatment options for Class II malocclusion include orthognathic surgery. Treatment choices are particularly difficult for young patients because of the uncertainty regarding future growth. Surgical treatment has generally been considered necessary for older patients with more severe Class II problems. The treatment records of more than 500 patients with Class II malocclusion were reviewed. Patients were grouped according to their initial treatment plan (surgery or orthodontics) and treatment outcome (overjet [OJ] reduced to < 4 mm or not). Discriminant function analyses using data from the patient's pretreatment cephalogram were used to determine whether age, in combination with malocclusion severity, could predict the choice of treatment, and whether a simple set of pretreatment variables could predict the success or failure of OJ reduction. The derived equations were tested in a similar group of growing Class II children. Although the data showed clinicians use patient's age in determining treatment choice, age did not seem to be associated with treatment outcome. The majority of the variability that determined the success or failure of OJ reduction was not explained by patient's age or malocclusion severity. These findings suggest other factors, including psychosocial variables, need to be explored if we are to gain a better understanding of why treatments succeed or fail.

Adolescent↗
PubMed1997

An American Board of Orthodontics case report: the nonsurgical orthodontic correction of a Class III malocclusion.

This is a case report of a patient with a skeletal Class III malocclusion and maxillary arch length deficiency. The patient was treated without extraction or surgery by increasing the maxillary arch length. Protraction of the maxillary complex and A point was the result. Favorable growth of both the maxilla and the mandible resulted in a functional Class I occlusion and an improved skeletal relationship. [This case report was presented to the American Board of Orthodontics in partial fulfillment of the requirements for the certification process conducted by the Board.]

Cephalometry↗
PubMed1983

The surgical-orthodontic correction of mandibular deficiency. Part II.

As discussed in Part I of this study, persons with mandibular deficiency and Class II malocclusions exhibit a wide spectrum of esthetic, cephalometric, and occlusal characteristics. In many such patients optimal overall results are best obtained via a combined orthodontic-surgical approach. In such patients a critical evaluation is essential to decide (1) the optimal operation and (2) the appropriate orthodontic-surgical sequencing. Our method of making these two basic decisions was presented in Part I. In this article the indications for mandibular advancement with or without genioplasty, total subapical mandibular advancement, superior repositioning of the maxilla, and inferior repositioning of the maxilla are discussed in detail. These alternatives are illustrated with representative cases, and the results are discussed. The intention of these two presentations is to illustrate an orthodontic-surgical approach to the correction of mandibular deficiency and Class II malocclusion that is predicated on a systematic evaluation of the individual patient rather than a standard approach.

Adolescent↗
PubMed1990

Surgical-orthodontic correction of open bite accompanied with Class III malocclusion.

In a patient with a long face, skeletal open bite and excessive mandibular body length, it was found that the sagittal split ramus osteotomy to close the open bite was unstable, when the lower jaw alone was a moved surgically to correct the open bite and progenie. There was a slight relapse of the open bite and lingual compensation of the upper incisors, which may have been due to tissue rebound during the retention period.

Child↗
PubMed1981

The surgical-orthodontic correction of vertical dentofacial deformities.

Patients with dentofacial deformities must be carefully evaluated to establish a complete diagnosis and exact treatment plan that will achieve optimal functional and esthetic results. Vertical deformities are just one component of existing deformities that may be present. The four primary vertical deformities are: vertical maxillary excess, vertical mandibular excess, vertical maxillary deficiency, and vertical mandibular deficiency. Differential diagnostic features of vertical deformities are presented from the standpoint of clinical, cephalometric, and dental model analyses. Only the vertical deformities were addressed in this paper; it must be realized that vertical components can exist with the anteroposterior, transverse, and asymmetry deformities as well. Orthodontic principles employed for management of vertical deformities were discussed with particular indications for each type of deformity. In addition, the surgical considerations were presented for each of the basic types of vertical deformities. The nature of the deformity will primarily dictate the orthodontics to be utilized as well as the surgical procedures.

Adolescent↗
PubMed1977

Surgical-orthodontic correction of open-bite deformity.

The combined simultaneous anterior and posterior maxillary ostectomy has proved to be a useful method of treating skeletal open-bite. It is indicated primarily in patients with lip incompetence, excessive exposure of maxillary anterior teeth, long lower-face height, contour-deficient chin, and Class II malocclusion. Primary contraindications are the Class III skeletal open-bite and lip competence. We have used the procedure as routine treatment for many open-bites over the past 5 years since we first described it. Clinically, the results have been most gratifying, with marked improvement in facial appearance and stability of the open-bite correction. A preliminary study of stability following this procedure indicated good stability with regard to the vertical repositioning of the maxillary segments. A recently completed study by us on thirty-two patients treated with this procedure and followed for an average of 1.5 years showed excellent stability. This is by no means the only method by which open-bite may be successfully treated, but it is one more method to add to our armamentarium. The surgical procedure must be carefully planned and executed to attain the best possible results. Furthermore, the orthodontic procedures, particularly those involving vertical forces, must be provided at the proper time so that the surgical results are not compromised. Nevertheless, with proper planning, attention to detail, and meticulous execution, the results are rewarding.

Adolescent↗
PubMed2002

The importance of the seated condylar position in orthodontic correction.

It has been proposed that the discrepancy between the seated and unseated condylar position be identified and eliminated when the occlusion is reorganized. Identification of this discrepancy is most accurately accomplished through the use of diagnostic casts that have been taken from a deprogrammed patient and mounted in the seated condylar position on a semiadjustable articulator through an estimated facebow transfer. The amount and direction of any discrepancy is determined three dimensionally with condylar position instrumentation.

Adult↗
PubMed1996

Orthodontic correction of lingually displaced canine teeth in a young dog using light-cured acrylic resin.

Lingually displaced canine teeth is a common malocclusion condition in dogs, the treatment of which has been described. Several of the previously reported treatment regimens involve the use of potentially harmful (toxic and/or dangerously exothermic) substances (methylmethacrylate) or require separate anesthetic episodes to make impressions and place the appliance. In this case, a dog was treated with directly placed appliances made of non-heat generating light-cured resin. Treatment required only one anesthetic episode to place the appliances and one more to remove them.

Acrylic Resins↗
PubMed1995

[Surgical-orthodontic correction of unerupted upper canine teeth and motivation for the procedure from the patient's viewpoint].

The surgical correction of the retention of upper canines is made easier by the direct bonding method, furthermore it increases the chances of successful treatment. At the same time at teen-age the treatment is usually missing, since the persistent milk-teeth in the place of impacted canines are ensuring the aesthetic effect. The late treatment is motivated by aesthetic aspects also by loosing the milk-canines. Thus the indication of the treatment is a cure only from the orthodontist's aspect, from the patient's view it's only the aesthetics.

Adolescent↗
PubMed1984

Surgical orthodontic correction of transverse maxillary deficiency: a simplified approach.

Osteotomy of the zygomaticomaxillary buttress in combination with a rapid palatal exapnsion appliance is a dependable technique for the treatment of horizontal maxillary deficiency in adults. This procedure has been used in 18 patients with excellent expansion in 17. In one patient, expansion was discontinued prior to overcorrection because of pressure necrosis on the palate related to the appliance. This was the only complication. The procedure is indicated mainly in those patients with a horizontal deficiency who do not require subsequent surgery, but for some patients it may be the preliminary procedure. Three patients in this series had subsequent orthognathic surgery. Follow-up has been from 1 to 6 years, and there has been no relapse. In our opinion, the zygomaticomaxillary buttress is the primary area of resistance to lateral movement of the maxilla by rapid maxillary expansion appliances.

Humans↗
PubMed2001

Diagnostic orthotics to establish the functional mandibular-maxillary relationship for orthodontic corrections.

Under optimal anatomic and physiologic circumstances, there exists a harmonious and functional balance between the occlusion, muscles of mastication and joint relationships referred to as a functional bite relationship. A diagnosis and treatment to the habitual bite relationship is provided if the function of the joints, muscles and associated structures is determined to be normal. If compromises of form or function are determined, a diagnostic orthotic is an essential tool to evaluate why the habitual bite position is not the best functional bite position and to also help determine a better functional relationship to avoid tissue and system compromise. The benefit of the diagnostic orthotic is the ability to establish an arbitrary reversible diagnostic relationship, evaluate the tissue and system response to this new association over time, and determine if the new treatment position is better for the patient than the habitual bite association.

Dental Occlusion↗
PubMed1991

Stability after surgical-orthodontic correction of skeletal Class III malocclusion. I. Mandibular setback.

Postsurgical stability of mandibular setback to correct mandibular prognathism was compared for three approaches: transoral vertical ramus osteotomy, bilateral sagittal split osteotomy with wire osteosynthesis and maxillomandibular fixation, and bilateral sagittal split osteotomy with rigid internal fixation via bone screws. In the transoral vertical ramus osteotomy group, the mean postsurgical change in chin position was almost zero, but nearly 50% of the patients did have clinically significant changes in chin position; two thirds of these movements were posterior and one third anterior. In the bilateral sagittal split osteotomy groups, the chin either stayed in its immediately postsurgical position or moved anteriorly. In one fourth of the patients who received maxillomandibular fixation and in nearly half of the patients who received rigid internal fixation, the chin moved forward more than 4 mm.

Adult↗