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Results for “Palatal Expansion Technique”

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At least 19 recordsLinked to original sources
PubMed1994

A comparison of two different rapid palatal expansion techniques from the point of root resorption.

The aim of this investigation is to compare Haas and Cast Cap Splint devices from the point of root resorption. The material comprised thirty-eight upper and twelve lower premolar teeth derived from nineteen patients who required RME and subsequent removal of the first premolars as part of their full banded orthodontic treatment. Root resorption and repair areas were observed on the buccal surfaces of premolars. Repair tissue was cellular cementum in both groups. There was no significant difference between these two techniques from the point of root resorption amount.

Adolescent↗
PubMed1997

Intraoperative expansion of the palate by the tumescent technique.

Intraoperative rapid expansion of soft tissue of the palate is reported. Tissue is recruited by repeated injections of an isotonic solution in a tumescent-like technique, thus producing increasing swelling of the palatal soft tissue. Straight direct closure of palatal clefts and fistulas is achieved with minimal scarring at the midline, no secondary healing of raw surfaces, and satisfactory and encouraging results.

Anesthesia, General↗
PubMed1999

Comparison of treatment outcomes with banded and bonded RPE appliances.

The purpose of this retrospective study was to compare the treatment outcomes with a banded (n = 38) versus a bonded (n = 55) rapid palatal expansion appliance followed by edgewise orthodontics. Both lateral cephalometric radiographs and orthodontic study casts were evaluated at pretreatment and posttreatment time periods. Overall, the banded rapid palatal expansion group had more vertical change than the bonded group. However, most of these changes were less than 1 degrees or 1 mm and may be considered clinically insignificant. This study could not establish superiority of one type of rapid palatal expansion technique over another.

Adolescent↗
PubMed1994

Presurgical orthopedic premaxillary alignment in cleft lip and palate reconstruction.

Premaxillary malposition is a difficult problem in cleft lip and palate repair. Orthopedic palatal devices are excellent in positioning the premaxilla, though they are somewhat cumbersome and require complex techniques in adjusting precisely the position of the premaxilla prior to repair. A new technique has been developed for premaxillary repositioning in conjunction with palatal shelf expansion and obturation. The procedure implements microplate fixation anterior to the premaxillary segment and linked to a palatal splint by adjustable elastics. The microplate is inserted through a nasal floor incision and secured by a tight submucosal tunnel through minimal dissection between the prolabium and premaxilla. The last hole of each microplate protrudes through the mucosa and is attached to a pin-retained palatal splint by an elastic chain. Differential tension is applied to the chains to allow gradual repositioning of the protruding maxilla while the splint expands and maintains positioning of the lateral palatal segments. These elastic retractors can be adjusted by staff in the outpatient office. During the past 2 years, this technique has been used successfully in 21 consecutive patients with unilateral or bilateral cleft lip and palate. Its technical ease and design allows simple adjustments to control premaxillary positioning and growth before definitive surgical closure.

Bone Plates↗
PubMed1999

Force-induced rapid changes in cell fate at midpalatal suture cartilage of growing rats.

The application of expansional force induces replacement of the cartilaginous tissue with bone at the midpalatal suture of growing rats. We examined the early cellular events evoked by force by analyzing the expression of proliferating cell nuclear antigen (PCNA), an operational marker of cell proliferation, and of several bone matrix proteins. A rectangular orthodontic appliance was set between the right and left upper molars of four-week-old rats, with 50 g of initial expansional force. Two days after application of the force, the pre-existing cartilage was separated laterally. Mesenchymal cells with stretched shapes were arranged parallel to the expansional force and filled the center of the suture. Only a few of these stretched cells exhibited nuclear accumulation of PCNA. In contrast, many polygonal mesenchymal cells distributed along the inner lateral side of the cartilaginous tissue exhibited strong immunoreactivity for PCNA. Localization of alkaline phosphatase activity overlapped into this proliferating cell zone. Nascent extracellular matrix under the proliferating cells was positive for osteocalcin, indicating commencement of active bone formation. These findings indicated that, among mesenchymal cells subjected to expansional forces, only cells located on the inner side of the cartilaginous tissue proliferate and differentiate into osteoblasts. In agreement with rapid bone growth progression, apoptosis was also observed in the zone of proliferating cells, as measured by TdT-mediated dUTP-biotin nick end labeling (TUNEL) assays.

Animals↗
PubMed1992

Microwave processing of cleft palate orthopedic expansion devices.

This article describes a method for making a palatal expansion device for use in conjunction with orthopedic repositioning of the premaxilla in patients with bilateral cleft palate. The technique of constructing the devices involves the microwave processing of a permanent soft liner and a heat-cured acrylic resin in a single-stage curing cycle. The resultant expansion device has the advantages of a soft liner for retention in the nasal cavity and an oral cavity surface that is smooth and closely adapted to the tissues. A paper cover is used during the flasking process, which allows packing of materials without displacement into undesirable locations.

Acrylic Resins↗
PubMed2002

Soft tissue healing after parasagittal palatal incisions in segmental maxillary surgery: a review of 311 patients.

PURPOSE: This study retrospectively evaluated the soft tissue healing after using parasagittal soft tissue incisions for surgical segmental maxillary expansion. PATIENTS AND METHODS: The records of 311 patients (224 females, 87 males), with an average age of 28.5 years (range, 12 to 62 years) who had transverse maxillary hypoplasia, were retrospectively evaluated. All patients underwent segmental maxillary osteotomies, surgical maxillary expansion greater than 5 mm, and placement of midpalatal porous block hydroxyapatite (PBHA). Parasagittal palatal soft tissue incisions were used to facilitate expansion, minimize soft tissue damage, and maintain soft tissue coverage over the PBHA implants. At postoperative follow-up visits, any signs or symptoms of complications associated with the use of the parasagittal incisions were recorded. RESULTS: Average patient follow-up was 3.4 years (range, 1.0 to 7.2 years). In 293 patients (94%), the palates healed uneventfully without complications. Eighteen patients (6%) had complications; 9 (2.9%) had infections associated with the midpalatal implants, 8 (2.6%) had oronasal communications, and 1 (0.3%) had problems associated with a palatal wire. Six patients with midpalatal implant problems required removal of the implant, 4 patients required closure of their oronasal communications, and 1 patient required removal of a palatal wire. Therefore, 11 patients (3.5%) required minor secondary surgical procedures. No teeth or alveolar bone were lost in any of the cases. CONCLUSIONS: The use of parasagittal palatal incisions appears to be a safe technique for soft tissue management during large surgical maxillary expansions associated with segmental maxillary osteotomies and midpalatal placement of PBHA implants.

Adolescent↗
PubMed1992

Surgically assisted rapid palatal expansion: an outpatient technique with long-term stability.

This study presents the results of surgically assisted rapid palatal expansion done on an outpatient basis in 19 patients with a mean age of 30 years. Postsurgical and postorthodontic evaluation (mean, 2.4 years) showed a mean relapse rate of 8.8% in the canine region, 1% in the premolar region, and 7.7% in the molar region. These results show that the surgical procedure is feasible on an outpatient basis and the technique, as outlined, yields a stable long-term result.

Adolescent↗
PubMed2002

[Combined rapid palatal expansion (RPE), edgewise technique and protraction headgear in correction of skeletal Class III malocclusion].

OBJECTIVE: The skeletal Class III malocclusion often occurs in ethnic Asia population, and it is difficult to obtain an ideal results if only treated with protraction headgear (PH). However, the combined rapid palatal expansion (RPE), Edgewise Technique and PH can reach it, so the authors investigated the methods and characteristics of combined RPE, Edgewise Technique and PH in the treatment of skeletal Class III malocclusion. METHODS: Fifteen patients, aged 8.5-12 years, including six males and 9 females, with skeletal Class III malocclusion and maxillary retrusion were selected for this study. Radiographs of left hand and wrist showed that all patients were at the pre-pubertal stage. The duration of treatment was nine months on average. RESULTS: The SNA and A-ptm increased with a mean of cephalometric analysis, which showed significant difference (P < 0.05). CONCLUSION: Obvious skeletal and profile changes can be achieved with combined RPE, Edgewise Technique and PH in the treatment of early skeletal Class III malocclusion.

Child↗
PubMed2005

[Respiration in orthodontic practice].

In this paper, the author presents his method of dealing with breathing problems when he conducts an orthodontic consultation. Because they can interfere with growth, the author believes that ventilation disorders should be dealt with promptly so that they cannot cause skeletal discrepancies. After having reviewed the literature, the author presents his clinical procedures for uncovering and treating breathing disorders and then shows treated cases to illustrate his techniques, one of the most important of which, palate splitting, is simple, effective and virtually without risk. In addition to its clear orthodontic benefits, rapid palate expansion can prevent the growth problems that frequently accompany breathing disorders. He believes that the Delaire's facial mask is the ideal preventive device for dealing with problems associated with skeletal Class III malocclusions. He asserts that, when indicated, the device can work well in conjunction with palatal expansion.

Adult↗
PubMed1997

Surgically-assisted maxillary expansion.

A combined surgical and orthodontic technique for management of transverse maxillary deficiencies in mature patients is described and discussed. Special references are made to the surgical release of several circummaxillary articulations to facilitate the use of a fixed expansion device, and to the authors' addition of an osteotomy below the nasal spine, to ensure that the nasal septum remains independent of the maxillary segments. Indications for the use of this surgically-assisted maxillary expansion technique, and its advantages when compared with segmented surgical expansion, are also presented.

Bone Lengthening↗
PubMed2003

Segmental unilateral transpalatal distraction in cleft patients.

Patients with unilateral cleft lip and palate (UCLP) can present with an asymmetric transversal deficiency caused by collapse of the lateral maxillary segment at the cleft side. The surgical technique and orthodontic implications of segmental unilateral transpalatal distraction (TPD) after a posterior maxillary subapical osteotomy using the transpalatal distractor (TPD(R)) are described. The differences between unilateral posterior surgical-assisted rapid palatal expansion (SA-RPE) and segmental unilateral TPD are discussed. The proposed orthodontic-surgical treatment strategy certainly has to be validated by long-term studies in the future.

Cleft Lip↗
PubMed1998

Stability of orthopedic and surgically assisted rapid palatal expansion over time.

At the present time no reports are available on the stability between orthopedic and surgically assisted rapid palatal expansion. This study was designed to examine and compare the dental and skeletal changes over time for both orthopedic maxillary expansion and surgically assisted palatal expansion. The study was divided into two groups. Group one was orthopedically expanded and consisted of 14 males and 10 females. The ages ranged from 6 years to 12 years with a mean of 8.5 years. Group two received surgically assisted rapid palatal expansion and consisted of 12 males and 16 females with ages ranging from 13 years to 35 years and a mean age of 19.25 years. All 52 subjects were white, from the same geographic area, and were treated by the same two operators. Dental models and posterior anterior cephalograms were obtained immediately before and after expansion, at removal of the expansion device, and 1 year after removal of the appliance. A repeated measures analysis of variance test was applied to assess changes over time between groups. The surgical and nonsurgical techniques displayed similar trends over time although the surgical group contained a greater quantity of expansion. Both the orthopedic and the surgical groups showed stable results.

Adolescent↗
PubMed1991

Managing the cleft lip and palate patient.

We have attempted to elucidate, first through an examination of the basic science of clefting and then through a description of the roles of the various members of the cleft palate team, an understanding of the multiplicity of problems faced by this heterogeneous group of children with cleft lip or palate. With an incidence of cleft of 1 in 700 births, all practicing pediatricians will at some time be faced with a patient with a cleft. Pediatric management begins in the hospital nursery by ruling out possible associated anomalies (e.g., congenital heart disease or urinary tract) or syndromes. At the same time, cleft palate nursers may be needed to overcome feeding problems. Simultaneously, counseling for the family begins with a positive attitude toward outcome and an initial explanation of the schedule of corrective procedures, i.e., lip repair at 3 months of age and palate repair at about 1 year. The counseling should incorporate an understanding of the cause of clefting, both its genetics and teratogenetics, and then proceed to noting the actual recurrence risks of 1% for a new cleft and 16% if there is a positive family history in a first-degree relative. The recurrence risks in recognized syndromes may follow mendelian patterns. Later, the pediatrician can help the family deal with multiple ear infections and the likely need for tympanostomy tubes, anticipating the need for tubes in a way that might facilitate placement at the time of anesthesia for the lip or the palate repairs. An understanding of the speech and language difficulties that may be encountered in later infancy may relieve parental anxiety. Later, after palate repair, knowledge of velopharyngeal incompetence may avert premature hypernasal speech problems caused by adenoidectomy, which should be avoided if at all possible. The pediatrician needs to be aware of the tooth malformations that accompany clefting of the alveolus as well as the increased susceptibility to caries, so that the family may be directed to early intervention by the pediatric dentist. With support by pediatrics of the efforts of pediatric dentistry, the child is then in optimal condition for orthodontics. Continually keeping the child's emotional adjustment in mind, the pediatrician can encourage the child and family, knowing that with palatal expansion techniques plus possible bone graft surgery to the cleft alveolus at about 9 years of age, the child may be orthodontically corrected to very near normal.(ABSTRACT TRUNCATED AT 400 WORDS)

Child↗
PubMed1998

[Congenital stenosis of the piriform aperture: a cause of respiratory distress in newborn infants. Review of the literature, from 2 cases].

Congenital nasal pyriform aperture stenosis is a rare cause of neonatal airway obstruction. Computed tomography confirms the diagnosis and delineates the anomaly. This abnormality can be isolated or associated with abnormalities of the midface. The two options are surgical or medical treatment. The surgical treatment usually used is a surgical enlargement of the nasal pyriform aperture via a sublabial approach. We report 2 cases of congenital nasal stenosis treated successfully by an inter-maxillary disjunction followed by an expandable palatal plate. This simple and low morbidity technique allowed a durable transversal augmentation of the pyriform apertures.

Airway Obstruction↗