Pulp changes from rapid maxillary expansion: a systematic review

Abstract Background This study assessed the effects of rapid maxillary expansion (RME) on alveolar bone cortical thickness and vertical bone level of maxillary first molar. Material and methods PubMed, Web of Science, Cochrane Central Register of Controlled Trials (CENTRAL), Scopus and a manual search in reference lists of the included studies were searched up to November 2020. The data extraction and risk of bias assessment were performed independently by two authors. Review Manager 5 was used for quantitative analysis. Results Eight studies were selected for the systematic review, and six studies were statistically selected in meta-analysis. The thickness of the distal buccal alveolar bone was significantly reduced of both left (MD 0.53;95% CI:0.15–0.90) and right (MD 0.61;95% CI:0.28–0.94) sides of the maxillary first molar after RME. The same was true for the left (MD 0.63;95% CI:0.28–0.98) and right (MD 0.63;95% CI:0.36–0.91) sides of the mesial buccal side. And the vertical distance between the cusp tip and the buccal alveolar crest increased significantly after RME (SMD − 0.92;95% CI: -1.20–0.64). However, the study of palatal cortical thickness of maxillary first molar needs more clinical trials because of its high heterogeneity (left: I2 = 92%; right: I2 = 86%). Conclusions According to current studies, RME can reduce the buccal cortical thickness of maxillary first molars and increase vertical bone loss. More research is needed to determine the stability of the results. However, it is advisable to evaluate the alveolar bone before treatment.

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Effects of laser therapy on patients who underwent rapid maxillary expansion; a systematic review

Lasers in Medical Science ◽

10.1007/s10103-018-2545-2 ◽

2018 ◽

Vol 33 (6) ◽

pp. 1387-1395 ◽

Cited By ~ 10

Author(s):

Amin Davoudi ◽

Maryam Amrolahi ◽

Hossein Khaki

Keyword(s):

Systematic Review ◽

Laser Therapy ◽

Rapid Maxillary Expansion ◽

Maxillary Expansion

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Transverse Skeletal Effects of Rapid Maxillary Expansion in Pre and Post Pubertal Subjects: A Systematic Review

Open Access Macedonian Journal of Medical Sciences ◽

10.3889/oamjms.2019.080 ◽

2019 ◽

Vol 7 (3) ◽

pp. 467-477 ◽

Cited By ~ 5

Author(s):

Nouran Fouad Seif-Eldin ◽

Sherif Aly Elkordy ◽

Mona Salah Fayed ◽

Amr Ragab Elbeialy ◽

Faten Hussein Eid

Keyword(s):

Systematic Review ◽

Meta Analysis ◽

Rapid Maxillary Expansion ◽

Maxillary Expansion ◽

Manual Search ◽

Weak Evidence ◽

Skeletal Effects ◽

Tooth Tissue ◽

Permanent Increase

OBJECTIVE: The aim of this systematic review was to assess the transverse skeletal effects of rapid maxillary expansion (RME) in pre and post-pubertal subjects. MATERIAL AND METHODS: Five databases were searched till May 2018; Pubmed, Cochrane, Scopus, Lilacs and Web of science in addition to the manual search of other sources. There were no language restrictions. Methodological Index for Non-Randomized Studies MINORS was used to assess the quality and risk of bias of the trials included. RESULTS: Six studies were finally included in the qualitative analysis. A meta-analysis wasn’t performed due to the heterogeneity of methodologies and outcomes. All of the included studies showed drawbacks in their structure yielding weak evidence. On the short term, RME caused an increase in the maxillary and lateral-nasal widths in pre-pubertal subjects by 3.4 mm and 3.3 mm, and by 2.8 and 2.2 mm respectively in post-pubertal subjects. Although statistically insignificant, the maxillary width increase was more than that of the post-pubertal subjects by 0.6 mm. Over the long term, expansion produced permanent increases in the transverse dimensions of both the dento-alveolar and skeletal components of the maxilla and circum-maxillary structures in pre-pubertal subjects. The post-pubertal subjects presented with a statistically significant increase only in the later-nasal width by 1.3 mm than the untreated controls with no permanent increase in the skeletal maxillary width. CONCLUSION: The literature is very deficient regarding the use of skeletal age as a reference in the treatment of skeletal crossbites using RME. Only weak evidence exists supporting the increased maxillary and lateral-nasal widths after tooth-tissue borne RME in pre-pubertal subjects, with these effects being less in the post-pubertal ones.

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Effect of Rapid Maxillary Expansion on Mandibular Rotation—A Systematic Review

The Journal of Indian Orthodontic Society ◽

10.1177/0301574219897318 ◽

2020 ◽

Vol 54 (1) ◽

pp. 5-13

Author(s):

Priyanka Chhutani ◽

Sonali Deshmukh ◽

Sandeep Jethe ◽

Sanket Agarkar ◽

Sujata Yerawadekar ◽

...

Keyword(s):

Systematic Review ◽

Clinical Trials ◽

Rapid Maxillary Expansion ◽

Controlled Trials ◽

Cochrane Central Register ◽

Maxillary Expansion ◽

Eligibility Criteria ◽

Maxillary Molars ◽

Central Register ◽

Clinical Trials Registry

Objective: To evaluate the effect of rapid maxillary expansion (RME) on mandibular rotation. Materials and Method: A systematic review of articles selected from 4 electronic databases—PUBMED, Cochrane Central Register of Controlled Trials, Clinical Trials Registry, and Google Scholar—was carried out. Additional studies were hand-searched and retrieved from the reference lists of relevant articles. Studies published till August, 2019, were included in this study. Results: A total of 28 articles were identified through electronic database searching. 16 articles were obtained after elimination of duplicates which were then screened. Full-text articles were assessed according to the eligibility criteria. 2 randomized controlled trials (RCTs) and 14 clinical trials (CTs) were identified for inclusion in the review. These studies effectively highlighted the effect of RME on mandibular rotation, primarily in the clockwise direction. Conclusion: There is a moderate sum of evidence to illustrate the effect of RME on mandibular rotation. It can be concluded that RME brings about clockwise rotation of the mandible, ie in downward and backward directions, thereby increasing the lower anterior facial height. This effect could be attributed to the vertical maxillary movement and the extrusion of the maxillary molars.

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