Effects of rapid maxillary expansion on periodontal-gingival status of the dentition - a randomised-controlled study

Effects of rapid maxillary expansion on periodontal-gingival status of the dentition - a randomised-controlled study - RME and Periodont/Gingiva

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00021240

Enrollment

Registered

2020-04-06

Start date

2020-03-30

Completion date

Unknown

Last updated

2026-03-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

K05.0 K05.1 K05.2 K05.3 K03.6 K06.0 K07.2

Interventions

Group 1: conventional band-borne RME appliance as described in Kieferorthopädische Apparaturen: Bildatlas – Grohmann, Steinkopff

2. bearb. u. erw. Aufl. 2005, activation twice / day in the morning and evening by 0.25 mm (total daily activation, 0.5 mm) for a total of 16 days (8mm), then blocking of the screw and 2.5 months rete

Eligibility

Sex/Gender

All

Age

No minimum to 18 Years

Inclusion criteria

Inclusion criteria: • Age <18 years (indication for non-surgically assisted RME) • transverse deficiency of the upper dental arch in relation to the lower dental arch (model analysis) with and without uni- / bilateral crossbite with a transversely deficient apical base (according to A.M. Schwarz or McNamara)

Exclusion criteria

Exclusion criteria: • Syndromes / cleft lip and palate / genetic diseases • simultaneous therapy with face mask (Delaire, Alt-RAMEC) • Earlier or planned extraction of permanent teeth • tooth hypoplasia (permanent dentition) • periodontal / gingival damage (probing depth> 3mm or radiologically detectable), smoker • previous orthodontic treatment • systemic diseases • dental diseases (caries, fractures, granulomas etc.)

Design outcomes

Primary

Measure	Time frame
PRIMARY OUTCOME periodontal attachment loss (periodontal probing depth) T0 – prior to insertion of RME appliance (baseline) T1 – 7 days after start of RME treatment T2 – 16 days after start of RME treatment (end of active RME treatment) T3 – 90 days after start of RME treatment (removal of RME appliance) T4 – 180 days after start of RME treatment	—

Secondary

Measure	Time frame
SECONDARY OUTCOME: gingival recession and height of attached gingiva TERTIARY OUTCOME: gingivitis (PBI, Saxer/Mühlemann) QUARTARY OUTCOME: plaque accumulation (PI, Silness/Löe) QUINTARY OUTCOME: furcation exposure and tooth mobility (periodontal status) SEXTARY OUTCOME: transversal expansion (anterior and posterior dental arch width in mm) T0 – prior to insertion of RME appliance (baseline) T1 – 7 days after start of RME treatment T2 – 16 days after start of RME treatment (end of active RME treatment) T3 – 90 days after start of RME treatment (removal of RME appliance) T4 – 180 days after start of RME treatment	—

Measure

Time frame

SECONDARY OUTCOME: gingival recession and height of attached gingiva TERTIARY OUTCOME: gingivitis (PBI, Saxer/Mühlemann) QUARTARY OUTCOME: plaque accumulation (PI, Silness/Löe) QUINTARY OUTCOME: furcation exposure and tooth mobility (periodontal status) SEXTARY OUTCOME: transversal expansion (anterior and posterior dental arch width in mm) T0 – prior to insertion of RME appliance (baseline) T1 – 7 days after start of RME treatment T2 – 16 days after start of RME treatment (end of active RME treatment) T3 – 90 days after start of RME treatment (removal of RME appliance) T4 – 180 days after start of RME treatment

—

Countries

Germany

Contacts

Public ContactSusanne Mömken

Zahnarztpraxis

susanne.moemken@googlemail.com097216465544

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Mar 14, 2026