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Comparison of changes in skeletal, dentoalveolar, periodontal, and nasal structures after tooth-borne or bone-borne rapid maxillary expansion: a parallel cohort study
No full textIntroduction: This parallel cohort study aimed to assess the dentoalveolar, skeletal, periodontal, and airway effects of tooth-borne (hyrax) and computer-guided miniscrew-supported rapid palatal expansion appliances. Methods: Thirty-six subjects were randomly allocated into 2 groups. Eighteen subjects (mean age, 12.2 years; male-to-female ratio, 10:8) were assigned to receive treatment with the hyrax appliance (group A), and 18 subjects were treated with the computer-guided miniscrew-supported appliance (group B). The same type of expansion screw and expansion protocol was used in both groups. Linear and angular measurements of skeletal, dentoalveolar, periodontal, and nasal floor changes were performed on the pretreatment and posttreatment cone-beam computed tomography images (6-month follow-up). Descriptive statistics and the independent Student t test were used for the statistical analysis. Intraoperator reliability was evaluated using a 2 sample t test. The level of significance was P ≤0.05. Results: Ten subjects were censured because posttreatment cone-beam computed tomography imaging was not performed because of the coronavirus disease 2019 pandemic. In the remaining 26 subjects, increases in linear measurements were observed in both groups. The transversal skeletal increase was greater and statistically significant in the group treated with the bone-borne expander (P ≤0.05). The dentoalveolar transverse diameters were greater in the tooth-supported expander group, with no statistically significant difference between the groups. The buccal inclination of the maxillary first molar was observed in the group with the tooth-borne expander, with a statistically significant difference between the 2 groups. A slight reduction of buccal and palatal thicknesses at the level of the maxillary first molars was observed in both groups, smaller in the skeletal expander group, with a statistically significant difference between the 2 groups only on the right buccal cortical plate. The width of the nasal floor increased more in the group with skeletal expander with a statistically significant difference of 2 mm. Conclusions: Computer-guided miniscrew-supported maxillary expanders allowed a greater transversal increase of the nasal-maxillary skeletal structures by reducing the dentoalveolar side effects of the tooth-supported devices
The impact of tooth-borne vs computer-guided bone-borne rapid maxillary expansion on pain and oral health–related quality of life: a parallel cohort study
No full textIntroduction: The primary aim of this study was to investigate and compare perceived pain intensity and oral health–related quality of life (OHRQOL) results during the activation phase of rapid maxillary expansion (RME), with tooth-borne and bone-borne devices. In addition, a secondary aim of this study was to evaluate the correlation between pain scales and the shortened Oral Health Impact Profile (OHIP-14) questionnaire. Methods: Thirty-six subjects (16 girls and 20 boys) with a mean age of 12.3 years (standard deviation, 0.82 years) were randomized into 2 groups. Group A received treatment with hyrax appliance, and group B received a computer-guided skeletal RME appliance. The same type of expansion screw and screw activation or expansion protocol were used. Two rating scales were used to assess the subject's pain during the activation phase of RME: a Graphic Rating Scale for Pain (GRS) and the Wong-Baker Faces Pain Scale (FPS). The OHIP-14 was used to evaluate the impact of RME on OHRQOL before the beginning of the treatment at day 3 and day 7 follow-ups. Painkillers were forbidden during the active phase of RME. Descriptive statistics, Student t test, and Pearson correlation were used. Significance was set at P ≤0.05. Results: A total of 36 subjects, divided into 2 groups, were treated in the study. Regarding the level of pain, the Student t test showed statistically significant higher pain in group B—although only on the first day of screw activation (GRS, P = 0.01; FPS, P <0.01). For the following days, there were no significant differences in pain levels between groups. The OHIP-14 showed no statistically significant difference at baseline (P = 0.32) and day 3 (P = 0.88) and day 7 (P = 0.85) follow-ups between the 2 groups. The Pearson correlation coefficient showed a statistically significant association between the 2 different scales of pain (GRS and FPS) but not a statistically significant correlation between GRS and FPS scales and OHIP-14. Conclusions: A higher perceived pain intensity in the patients treated using a bone-borne computer-guided skeletal RME appliance was limited to the first day of screw activation. There were no statistically significant differences between the 2 types of treatment in terms of their impact on OHRQOL and no statistically significant correlation between pain scales and the OHIP-14 questionnaire
La disinclusione del secondo molare mandibolare con I'utilizzo del filo di ottone: uno studio clinico prospettico. The treatment of impacted mandibular second molars using brass wire: a prospective clinical study
No full textOBIETTIVI
Valutare l’efficacia della tecnica del
filo di ottone per l’uprighting dei secondi
molari mandibolari (MM2) inclusi
mesio-angolati, l’influenza della
germectomia del terzo molare inferiore
(MM3) sul tempo di trattamento
e l’impatto della germectomia sulla
qualità della vita del paziente.
MATERIALI E METODI
24 MM2 sono stati sottoposti a
trattamento di disinclusione con
germectomia (gruppo A) o senza
germectomia (gruppo B).
RISULTATI
Tutti i MM2 sono stati disinclusi. Non
c’è stata una differenza statisticamente
significativa nel tempo di trattamento
tra i due gruppi. La germectomia
ha influenzato negativamente
la qualità della vita del paziente.
CONCLUSIONI
La tecnica del filo di ottone è efficace.
La germectomia del MM3
non influenza il tempo di trattamento,
ma incide negativamente
sulla qualità della vitaOBJECTIVES To evaluate the efficacy of brass wire ligature to correct a moderately me- sially-impacted mandibular second molar (MM2). The influence of third mandibular molar (MM3) germecto- my on the treatment time and its impact on oral health-related quality of life (OHRQoL) were also evaluated. MATERIALS AND METHODS 24 MM2 impacted were randomly assigned to receive either a wire brass treatment with germectomy (group A) or without germectomy (group B). RESULTS In all cases the impaction was corrected. The paired comparisons between group A and group B showed no statistically significant difference in the treatment time and a statistically significant difference of OHRQoL. CONCLUSIONS The brass wire technique is effective. The combined use of germectomy does not influence the treatment time but has a negative impact on OHRQoL
Is a two-month healing period long enough to achieve osseointegration? A prospective clinical cohort study
No full textThe aim of this study was to evaluate the effectiveness of loading at 2 months after the surgical placement of implants. A tapered implant was used. Implant stability was determined using resonance frequency analysis at implant insertion (T0; primary stability), after 2 months (T1), and at the 6-month follow-up (T2). Descriptive statistics and the t-test were used. Significance was at P ≤ 0.05. A total of 268 implants were inserted in 142 patients. No patient dropped out and no implant had failed at the 6-month follow-up. The mean implant stability quotient value (ISQ) increased over time, with a statistically non-significant difference for T0 vs. T1 (P = 0.08) and a statistically significant difference for T1 vs. T2 (P = 0.0018) and T0 vs. T2 (P = 0.000). Only 99 implants, characterized by an extremely high mean primary stability value (80.34), did not have a recorded increase in ISQ at T1. A 2-month healing period allowed the implant to achieve secondary stability, confirming the effectiveness of the loading protocol at 2 months
Miniscrew-supported distal jet versus conventional distal jet appliance : a pilot study
Full text linkMaxillary molar distalization is the most frequently used nonextraction treatment in the correction of Class II malocclusion. The use of traditional intra-oral devices shows unreliable results. Nowadays the use of miniscrew-supported appliances helps prevent anchorage loss. The aim of this pilot study is to compare the amount of upper first molar distalization and the dentoalveolar side effects using traditional distal jet appliance and miniscrew-supported distal jet appliance. 20 patients were randomly assigned to receive a treatment with miniscrew-supported distal jet appliance (Group A) or with traditional distal jet appliance (Group B). To ensure a safe and minimally invasive miniscrew insertion a surgical guide was used. Digital models and lateral cephalograms were obtained and analyzed before orthodontic treatment and at 6-month follow-up. Intergroup differences were determined using T- test. The significance was set at p ?0.05. The intra-operator reliability was evaluated using a 2 sample T-test. The difference was not statistically significant (P ?0.05 ), demonstrating an intra-operator reliability. In Group A, a greater maxillary first molar distalization was recorded (P=0.002). Considering the dentoalveolar side effects, in Group A, a spontaneous distalization of the first premolars and a retroclination of central incisors were determined. In Group B, the first premolars tipped mesially with a proclination of the maxillary central incisors. Miniscrew-supported distal jet appliance achieved a greater first molar distalization at 6-month follow-up and did not cause dento-alveolar side effects, such as the mesial drift of the premolars and the incisors
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