Effects On Palatal Surface Area In Mixed Dentition Patients Treated With Leaf Expander And Rapid Palatal Expander, Compared To Untreated Subjects: A Randomised Clinical Trial

Aim: To evaluate palatal surface effects induced by LE and RPE, alongside spontaneous changes in an untreated group, and to compare differences in canine and molar inclination among the three groups. Materials and Methods: This randomised clinical trial aimed to compare digital models pre- and post-treatment over 12 months in patients receiving tooth-borne Leaf Expander® (LE) and tooth-borne Hyrax-type maxillary expander (RPE) treatments, alongside untreated patients. Analysis included 24 LE patients (13 males, 11 females, mean age 8.5±1.5), 22 RPE patients (10 males, 12 females, mean age 7.9±1.6), and 17 untreated subjects (7 males, 10 females, mean age 8.1±1.2). Inclusion criteria comprised indications for maxillary expansion treatment, mixed dentition, CVMS ≤ 3, erupted first molars, and good oral hygiene. Digital models were obtained using an intraoral scanner pre- and post-treatment. Palatal surface, segmented into anterior, median, and posterior zones, and canine/molar inclination were measured at T0-T1 using VAM software as the primary and secondary endpoint. Statistical analyses involved paired-sample T-tests for intra-group comparisons and ANOVA tests with Bonferroni correction for inter-group comparisons. Results: Total surface increment for LE was 155.4 mm2 (±49.92mm2); for RPE, it was 187.7 mm2 (±58.06 mm2); and for the control group, it was 55.35 mm2 (±18.69mm2), significant in all three groups. Statistically significant differences were observed in the anterior, median, and posterior zones, as well as in the total surface increment, between the LE and control groups, and between the RPE and control groups. No significant difference was found between the LE and RPE groups in surface increments. The RPE group exhibited a significant increase in vestibular inclination for molars and canines post-therapy. Conclusions: No significant difference in palatal surface increment was found between the two experimental groups (LE and RPE); both demonstrated a significant increase in palatal surface. The greatest increment occurred in the median palate zone for both experimental groups. The increment in the untreated control group was not significant. Furthermore, the RPE group showed a greater inclination of permanent molars compared to those treated with LE, indicating that expansion with lighter and continuous forces may lead to fewer dental side effects

Efficiency in the correction of Class II division 1 malocclusions with prominent upper incisors and increased overjet: A comparison between two methods

BACKGROUND: The aim of the present study was to evaluate the efficiency and effectiveness of high-pull traction on a Stephenson plate as well as cervical headgear treatments in Class II Division 1 growing subjects with prominent upper teeth and an increased overjet. METHODS: A prospective study was undertaken, involving participants who underwent maxillary correction of Class II malocclusions. Twenty-three patients (Stephenson plate group, SPG, mean age 10.4\ub10.9 years) were treated and compared with 24 subjects treated with headgear (HGG, mean age 9.6\ub11.2 years). Lateral cephalograms were analysed using Jarabak and Pancherz analysis. Shapiro-Wilk's and Student's t tests were applied. RESULTS: The SPG showed significant decreases in the overjet (-4.1 versus -0.8 mm) and molar relationship (-6.1 versus -1.5 mm). A significant upper-incisor correction was found in SPG (1/SpP -10.3\ub0 versus + 2.2\ub0). SNA (-1.4 versus 0.3\ub0) and WITS (-1 versus 0.3 mm) were reduced in SPG, showing a partial maxillary restraint. In SPG, the overjet correction (4.1 mm) was mainly due to the dental component (65.9%) and occurred almost completely in the maxilla (92.7%); the molar relationships improvement of 6.1 mm was mainly dental (77%); in HGG, the reduction of the overjet was limited (-0.8 mm), and the skeletal maxillary contribution was negligible. CONCLUSIONS: The high-pull traction on the Stephenson plate was more efficient and effective than HG in the treatment of Class II dentoskeletal malocclusions with prominent upper teeth and a severe overjet; the overjet reduction was obtained at approximately 6 months, contributing to the substantial Class II correction

SKELETAL MODIFICATIONS DUE TO FUNCTIONAL APPLIANCES IN CLASS II MALOCCLUSIONS. A CLINICAL-CEPHALOMETRIC RESEARCH

SCOPO DELLA RICERCA: misurare sul tracciato cefalometrico le modificazioni mandibolari indotte da alcune apparecchiature ortopedico-funzionali (Regolatore di Funzione di Fraenkel, attivatore di Andresen, Placca Funzionale di Cervera), confrontandole con gruppo di controllo (trattamento ortodontico multibande) e con pazienti non trattati (Riolo). RISULTATI: Complessivi migliori risultati con terapia funzionale rispetto al gruppo di controllo ed al Riolo. Miglioramento del pattern di crescita verso normodivergenza in buona percentuale (soprattutto con Andresen) ed in alcuni casi modifica del pattern. In questo studio, l\u2019attivatore di Andresen si \ue8 dimostrato il dispositivo funzionale che ha indotto il maggior incremento di crescita di quasi tutti i parametri, in particolare in senso verticale, rispetto al gruppo di controllo. Sono stati riscontrati i migliori risultati nelle femmine e in et\ue0 precoce (CS1).In questo studio viene sottolineata la difficolt\ue0 a confrontare et\ue0 anagrafica e scheletrica e a quantificare la compliance, parametro di importanza fondamentale in terapia funzionale e che potrebbe essere alla base dei migliori risultati riscontrati in et\ue0 precoce e nel sesso femminile, cio\ue8 laddove \ue8 maggiore la collaborazione e la motivazione

Elastodonzia:alcune considerazioni cliniche

indicazioni e controindicazioni all'elastodonzi

Early Treatment in dentatura decidua: casi clinici

viene sottolineata l'importanza del trattamento precoce in dentatura decidua nei casi di cross-bite monolaterale, scissors-bite, inclinazione del piano occlusale, grave morso profondo o apert

La terapia delle parodontopatie

il cap VII parla della terapia delle parodontopatie in et\ue0 pediatrica: gengiviti marginali, ascessi gengivali, recessioni gengivali localizzate, gengiviti legate a malattie sistemiche. Dopo una analisi delle possibili etiologie, la terapia viene effettuata attraverso l'insegnamento della igiene orale, terapia conservativa o estrattiva , terapia farmacologica, trattamento ortodontico quando necessario, terapia chirurgica. Ogni aspetto viene descritto ed approfondito sia dal lato etiologico che terapeutic

Early functional treatment in Class II division 1 subjects with mandibular retrognathia using Fr\ue4nkel II appliance. A prospective controlled study

This was to clarify dentoalveolar, skeletal and facial profile modifications induced by Fr\ue4nkel II functional treatment in Class II division 1 subjects in prepubertal stages CS1-2. MATERIALS AND METHODS: Evaluation of 25 caucasian subjects (15 males, 10 females), mean age 8y 11m, in vertebral stages CS1-2. The mean duration of functional treatment was 1y 11m. STUDY DESIGN: Prospective controlled study. The sample was evaluated at T0, start of treatment, and T1, end of Fr\ue4nkel II therapy. Untreated subjects in Class II division 1 were the control group. STATISTICS: T-test for paired data was calculated before and after treatment (P< 0.05). RESULTS: A statistically significant increase between T0 and T1 was obtained for SNB (p = 0.022), ANB (p <0.001), Mx/Mn differential (p = 0.001), Co-Go-Me (p = 0.014), OJ (p < 0.001), OB (p = 0.042), IMPA (p = 0.021) . OJ (p < 0.001) and OB (p = 0.003) showed a higher significant change in the Fr\ue4nkel group compared to control group. CONCLUSION: The Fr\ue4nkel II appliance produced, in CS1-2 subiects, significant effects in teeth position, skeletal modifications and soft tissue changes, although the pubertal growth spurt would occur at least two years later