Skeletal and dental changes accompanying rapid midpalatal suture opening

Wertz, Robert A.

doi:10.1016/0002-9416(70)90127-2

Cited by 594 publications

(547 citation statements)

References 12 publications

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“…As the two parts of the maxilla separate from each other, they also tip buccally with a centre of rotation located approximately at the frontomaxillary suture (Haas, 1961(Haas, , 1970Werz, 1970). The results of the present study confirmed these findings and showed that asymmetrical angular changes occurred in both groups.…”

Section: Discussionsupporting

confidence: 84%

Slow maxillary expansion: a comparison between banded and bonded appliances

Mossaz-Joëlson

Mossaz

1989

European Journal of Orthodontics

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SUMMARY Various investigations have mentioned the use of a bonded maxillary expansion appliance. It was postulated that a full coverage of the occlusal surfaces by acrylic would remove interferences during the lateral displacement of the two maxillary bones and would lessen the resistance to maxillary expansion. The first objective of this study was to compare two appliances, a bonded and a banded Minne expander using a continuous force of two pounds, which would produce a slow maxillary expansion. The second objective was to evaluate the ratio between the skeletal and dental response to slow maxillary expansion, and to compare these results to those obtained with a rapid maxillary expansion procedure.Each experimental group consisted of 5 patients, aged between 8 and 12 years wearing the two different appliances. Prior to treatment they were implanted according to the Bjork technique. The slow expansion period lasted 7 to 15 weeks followed by a retention period of 12 weeks. Post-retention observations followed 12 weeks after the end of retention.No significant difference was found between banded and bonded appliances in regard to dental and skeletal expansion and relapse. The amount of skeletal versus dental movements equalled results obtained with rapid maxillary expansion. The relapse tendency appeared lower than with rapid maxillary expansion.

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Section: Discussionsupporting

confidence: 84%

Slow maxillary expansion: a comparison between banded and bonded appliances

Mossaz-Joëlson

Mossaz

1989

European Journal of Orthodontics

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“…[4][5][6]9,11,[13][14][15][16] There was a greater increase in the IMD measurement in patients treated with the tooth-borne expander (7.4 mm) compared to patients treated with the tooth-tissue-borne expander (5.8 mm), Table 4 -Mean and standard deviation of the proportion between screw activation and changes promoted by rapid maxillary expansion.…”

Section: Discussionmentioning

confidence: 99%

“…This type of malocclusion may be corrected in different manners, including slow expansion, [1][2][3] rapid expansion [4][5][6] and surgically assisted expansion. 7,8 Most rapid maxillary expansion treatments employ fixed tooth-tissue-borne and tooth-borne expanders.…”

Section: Introductionmentioning

confidence: 99%

Rapid palatal expansion: a comparison of two appliances

Rodrigues¹,

Monini

Gandini

et al. 2012

Braz. oral res.

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Rapid palatal expansion: a comparison of two appliancesAbstract: This study analyzed occlusal radiographs to compare the transverse changes produced in patients treated with rapid maxillary expansion using two types of appliances. The sample consisted of 31 children aged 7 to 10.6 years, of both genders, with posterior cross-bite. Fifteen children were treated with a tooth-borne expander and 16 were treated with a tooth-tissue-borne expander. Occlusal radiographs obtained at treatment onset and at the end of the retention period were digitized. The following variables were measured: intermolar distance (IMD), interapical distance (IApD), interbase distance (IBaD) and interarm distance (IArD). The results revealed increases in all measurements in both groups after rapid maxillary expansion. Comparison between groups revealed that the increases were greater in patients treated with the tooth-borne expander, except for the IArD measurement, which presented the same increase in both groups. Even though the IMD measurements differed between expanders, they were proportional to the activation of the appliances (IBaD). The increase in the IApD measurement was proportionally greater in the group treated with the tooth-borne expander (0.7:1.0) than in that treated with the tooth-tissue-borne expander (0.4:1.0). It was concluded that both appliances had similar effects, although the tooth-tissue-borne expander produced a lesser opening at the apical region of the incisors.

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“…Nevertheless, it can generate several problems in skeletally mature patients, such as fenestration of the buccal cortex, root resorption, lateral tipping of the teeth, and, finally, the inability to open the midpalatal suture. 1,2 To date, the decision of whether to use surgically assisted RME (SARME) has been an age-based one, although no reliable correlation between chronological age and changes in the midpalatal suture in skeletally mature patients exists. 3 Since SARME results in a higher morbidity than conventional RME, 4,5 finding ways to determine if and to what extend the expansion of the maxillary complex will need surgical assistance or not is important to reducing the potential risks for the patient.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the midpalatal suture width

Fricke-Zech

Gruber

Dullin

et al. 2011

The Angle Orthodontist

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Objective: To conduct a pilot study to investigate the potentiality to determine the midpalatal sutural width radiographically with a flat-panel volume computed tomography (fpVCT) in a porcine model. Materials and Methods: Bone samples from the midpalatal suture of five young (16 weeks) and five old (200 weeks) sus scrofa domestica were gathered. The midpalatal suture width was measured via fpVCT and compared to respective histological preparations. Results with P , .05 were considered significant.

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Skeletal and dental changes accompanying rapid midpalatal suture opening

Cited by 594 publications

References 12 publications

Slow maxillary expansion: a comparison between banded and bonded appliances

Slow maxillary expansion: a comparison between banded and bonded appliances

Rapid palatal expansion: a comparison of two appliances

Measurement of the midpalatal suture width

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