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The accurate mandibular condylar positioning for orthognathic surgical planning is fundamental in obtaining a planned occlusal result. The differences between the position of condyles seen on computed tomography or cone-beam computed tomography (CBCT) scans and during surgery reduce the accuracy of the result. This study aimed to assess the differences between the condylar position recorded on CBCT and a numerical 3-dimensional (3D) model created after mandibular repositioning for orthognathic surgery planning.This study retrospectively evaluated 49 patients who underwent virtual orthognathic surgery planning. The procedure involved recording a computed tomography or CBCT of the skull and dental surface using an intraoral digital scanner. The mandible was repositioned on the numerical 3D model according to the superimposed virtual bite registration in centric relation. Linear and angular measurements of the right and left condyles were recorded before and after mandibular repositioning.The positions of 98 condyles were compared. Linear measurements of the posterior and superior joint spaces revealed a significant difference. Subgroup analyses displayed statistically significant differences for patients with skeletal Class II malocclusion.According to the digital bite registration method, the difference between the mandibular position recorded on CBCT and on the numerical 3D model after repositioning may have clinical significance. Further studies are needed to validate this theory and test the accuracy of the clinical results.

(1) Aim: The purpose of this study was to assess patients’ and practitioners’ reported experience measures (PREMs) following a first standard orthodontic consultation (face-to-face consultation) versus a first orthodontic teleconsultation (video-assisted remote orthodontic consultation).; (2) Materials and Methods: This study was designed as a randomized controlled trial in which 60 patients were randomly allocated to two groups. In the control group, patients received a first face-to-face consultation (n = 30) whereas, in the test group, patients received a first orthodontic teleconsultation (n = 30). Patients as well as the orthodontic practitioners completed questionnaires after the experience. (3) Results: From the patients’ point of view, overall satisfaction was comparable between the control group and the test group (p = 0.23). Quality of communication with the clinician, understanding of the explanations provided and a sense of privacy were also comparable between the two groups. However, from the practitioners’ perspective, overall satisfaction after the face-to-face consultation was significantly higher than after the first remote consultation (p < 0.01). (4) Conclusions: In the context of a first orthodontic consultation, teleorthodontics appears to be an interesting and complementary approach to a classical face-to-face appointment, but which should by no means become systematic.

Objective Assess the clinical effects, 3D radiographic results and patient-reported outcome measures (PROMs) of buccal bone regeneration combined with piezocision. Methods Ten patients presenting roots prominence with a thin buccal bone thickness or buccal bone dehiscence in the lower front region were enrolled. Patients received orthodontic treatment assisted by piezocison which was combined with a buccal alveolar bone regeneration using a tunneling approach. A comparison between pre- and post-treatment alveolar bone measurements based on CBCT was performed. Periodontal parameters such as recession scores and root resorption were recorded before and after treatment. The PROMs were also investigated. Results An overall significant buccal bone gain of 2.7 ± 2.7% was found after the treatment. The apical region reached the highest gain of 8.9 ± 5.5% whereas the most coronal region showed no significant increase of the bone envelope (1.2 ± 2.7%). No adverse event such as the appearance of recession or root resorption were observed. However, in 2 patients, the biomaterial was not properly integrated and seemed to be encapsulated. The pain level and the paracetamol consumption were equivalent to those after the placement of the orthodontic appliance except on the day of the surgery. Conclusions Within the limitation of this study, piezocision combined with buccal bone regeneration using a tunneling technique seems to be effective to augment bone and did not lead to gingival recession. However, in 2 cases the biomaterial seemed encapsulated, and therefore the predictability of the integration of the material can be questioned. ClinicalTrials.gov registration : NCT03655938.

Objectives To discern the effects of computer-aided design (CAD)/computer-aided manufactured (CAM) customized appliances and piezocision on orthodontic treatment (OT). Materials and Methods The study combined findings from two previously published randomized controlled trials: (1) standard OT vs piezocision-assisted standard OT, and (2) CAD/CAM OT vs piezocision-assisted CAD/CAM OT. Piezocision is a minimally invasive corticotomy surgical procedure used to accelerate orthodontic treatment and CAD/CAM refers to CAD/CAM customized brackets and archwires. The outcomes were the overall treatment time, and the durations of the alignment phase and fine-tuning phase. Clinical and radiological features also were evaluated. Results The combined study included 48 patients with similar baseline characteristics. Compared to the standard treatment, CAD/CAM technology alone significantly decreased the overall median OT time from 543 to 394 days (P < .001) and from 543 to 254 days (P < .0001) when combined with piezocision. Although piezocision significantly reduced the duration of the alignment phase in the mandible and maxilla, CAD/CAM technology considerably shortened the fine-tuning phase. All periodontal and radiographic parameters remained stable from the start to the end of treatment in all groups. Conclusions CAD/CAM technology combined with piezocision accelerates the entire OT process, during the alignment phase for piezocision and during the fine-tuning phase for CAD/CAM, with a global reduction of the overall treatment time of more than 50%.

Objective To compare computer-aided design and computer-aided manufacturing (CAD/CAM) customized nitinol retainers with standard stainless-steel fixed retainers over a 12-month study period. Methods This randomized controlled trial (RCT) was conducted on 62 patients randomly allocated to a control group that received stainless-steel retainers or a test group that received customized CAD/CAM nickel-titanium retainers. Four time points were defined retainer placement (T0) and 1-month (T1), 6-month (T2), and 12-month (T3) follow-up appointments. At each time point, Little’s irregularity index (LII) (primary endpoint) and dental stability measurements such as intercanine width were recorded in addition to assessment of periodontal parameters. Radiological measurements such as the incisor mandibular plane angle (IMPA) were recorded at T0 and T3. Failure events (wire integrity or debonding) were assessed at each time point. Results From T0 to T3, LII and other dental measurements showed no significant differences between the two groups. The data for periodontal parameters remained stable over the study period, except for the gingival index, which was slightly, but significantly, higher in the test group at T3 (p = 0.039). The IMPA angle showed no intergroup difference. The two groups showed no significant difference in debonding events. Conclusions This RCT conducted over a 12-month period demonstrated no significant difference between customized CAD/CAM nickel-titanium lingual retainers and standard stainless-steel lingual retainers in terms of dental anterior stability and retainer survival. Both retainers eventually appeared to be equally effective in maintaining periodontal health.

Objective To compare treatment duration and quality between standard vs computer-aided design/computer-aided manufacturing (CAD/CAM) customized self-ligating systems using indirect bonding with both. Materials and Methods This comparative trial included 24 patients: 12 treated with a CAD/CAM custom indirect bonding self-ligating system (CAD/CAM) and 12 others treated with an indirect bonding self-ligating standard system (I-STD). For each group, overall orthodontic treatment (OT) time was calculated and included the time needed to place each arch as well as the duration of the alignment and fine-tuning phases. The quality of the final result was analyzed using the American Board of Orthodontics Cast-Radiograph Evaluation. Patient-reported outcome measures (PROMs) were also evaluated. Results Patient characteristics were similar between the 2 groups except for age, which was slightly lower in the I-SDT group. Overall OT time was increased by 26% in the I-STD group compared with the CAD/CAM group (497 ± 40 days vs 393 ± 55 days, P = 0.0002) due to a shorter fine-tuning phase in the latter group (P Conclusions Despite a 26% longer OT time when compared with the CAD/CAM customized bracket system, the indirect bonding self-ligating bracket system demonstrated the same quality of treatment. PROMs demonstrated a high level of acceptance and satisfaction for both techniques.

Objectives To introduce a minimally invasive and simple ortho-pros approach for localized tooth wear treatment. Clinical considerations Four patients with localized anterior and/or posterior tooth wear were treated. Occlusal analyses were performed, and localized wax-up or digital setup were designed based on estimated tissue loss. No-prep anterior and posterior partial-coverage polymer-infiltrated ceramic network (PICN, Vita Enamic) restorations (eg, palatal and occlusal veneers) were computer-aided designed and manufactured (CAD-CAM), tried in, and bonded in supraocclusion, creating a posterior open bite. Then, brief partial (three patients) or global (one patient, for anterior teeth alignment request) orthodontic treatment was performed to extrude the posterior teeth and re-establish posterior occlusal contacts. The orthodontic treatment duration was ~2 months for extrusion. Direct composites were performed to mask the labial finish line of palatal veneers. Clinical results were successful after a follow-up of 15, 21, 23, and 47 months, with 100% success rate of PICN anterior restorations and some minor chippings of borders of thin (0.2 mm) posterior occlusal veneers. Patient-reported outcomes were positive. Conclusion Orthodontic-assisted one step-no prep technique is an advantageous and straightforward evolution of the Dahl concept. PICNs exhibit several advantages in this interdisciplinary approach. Clinical significance New hybrid-ceramic CAD-CAM materials and a collaborative interdisciplinary approach support the evolution of the Dahl concept for conservative treatment of worn dentitions. The orthodontic-assisted one step-no prep technique is predictable, efficient, and well tolerated by patients and conserves tooth structure.

(1) Background and objective: Tooth movements described as unexplained, aberrant, unexpected, unwanted, or undesirable can occur in the presence of an intact orthodontic retention wire, without detachment or fracture. This iatrogenic phenomenon, known little or not by many practitioners, responsible for significant dental and periodontal complications, both functional and aesthetic, is called "Wire Syndrome" (WS). It is therefore considered an undesirable event of bonded orthodontic retainers, which must be differentiated from an orthodontic relapse. The objective was to perform, for the first time, a systematic review of the literature in order to define the prevalence of WS and to study its associated clinical characteristics. (2) Methods: A systematic review of the literature was performed following the guidelines of Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) and recommendations using an electronic search strategy on four databases complemented by a manual search. All the prospective and retrospective clinical studies, including case reports and series, written in English or French, clearly mentioning the description, detection, or management of WS were included. Three independent blinding review authors were involved in study selection, data extraction, and bias assessment using the Mixed Methods Appraisal Tool (MMAT). (3) Results: Of 1891 results, 20 articles published between 2007 and 2021 fulfilled the inclusion criteria, with a globally high risk of bias since 16 articles were case report/series. The analysis of each article allowed the highlighting of WS through 13 categories, as follows: prevalence, apparition delay, patient characteristics, arch and tooth involved, families of movements, dental and periodontal consequences, type of wire, risk factors, etiologies, treatment, and preventive approach. (4) Conclusion: This systematic review of the literature elaborated a synthesis on WS, allowing general practitioners, periodontists, and orthodontists to understand this adverse event, to facilitate the diagnostic approach, and to underline preventive measures against WS. This review was registered in the International Prospective Register of Systematic Reviews (PROSPERO; number CRD42021269297).

(1) Background: Clear orthodontic aligners support the development of oral biofilms, which could lead to interferences with the oral microbiota already existing and the deterioration of oral health, with the development of dental caries, periodontal disease and even systemic infections. Therefore, preventive oral health care requires a cleaning and disinfection procedure for aligners. (2) Methods: A systematic review of the literature was conducted across four databases following the PRISMA guidelines up to May 2021, combining an electronic and a manual search. Prospective studies, including randomized controlled trials (RCTs), crossover studies (COSs) and controlled clinical trials (CCTs), published in the English language without time restrictions, evaluating the efficacy of cleaning and disinfection protocols for clear orthodontic aligners by comparing them with a placebo or a negative control, were included. The article selection, data extraction and risk of bias assessment were performed by two independent blinded review authors. In case of disagreement, a third author was solicited throughout the selection process. (3) Results: Among the 221 articles screened in the search process, 4 studies were included in the review, all designed as crossover studies (single arm without randomization with the same sequence of different cleaning and disinfection protocols for each participant). Different cleaning and disinfection methods were studied such as mechanical methods (brushing with toothpaste or vibration), chemical methods/pharmaceutical products (chlorhexidine antibacterial substance, anionic or cationic detergents or effervescent tablets) or combinations of both. (4) Conclusion: Although the determination of the most remarkable method of cleaning and disinfection was impossible because no direct comparison was conducted between all these methods, a multi-step protocol, including the combination of a mechanical and a chemical method, seems to be the most effective approach. Further research is needed to define the most preventive oral health care protocol. Registration: PROSPERO CRD 42021278498.

(1) Background: The use of removable orthodontic appliances, which is common in early ages, requires careful hygiene, as several different microorganisms are found on their surface during the orthodontic treatment. (2) Methods: Comprehensive electronic searches were conducted up to May 2021. Randomized controlled trials (RCTs) or controlled clinical trials (CCTs), prospective or retrospective, evaluating the efficacy of cleaning and disinfection methods for acrylic removable orthodontic appliances, redacted in the English language, were included. Three independent blinding review authors were involved in study selection, data extraction, and bias assessment. (3) Results: A total of 2491 records were screened and eight studies (six RCTs and two CCTs) fulfilled the inclusion criteria. Among the overall cleaning and disinfection methods described in the included studies, four categories could be defined: liquid antimicrobial agents, commercial tablet cleansers, natural plant extracts and incorporation of quaternary ammonium methacryloxy silicate, all of which demonstrated superior efficacy compared to the placebo/negative control. However, the different methods were not compared with each other. (4) Conclusions: Biofilm control on acrylic orthodontic removable appliances can be performed using the different cleaning and disinfection methods considered in the included studies. Further studies are needed to define the most effective technique. Registration: PROSPERO CRD 42021269297.

Le Digital Smile Design (DSD) a été mis au point dans les années 2000 par Christian Coachman, chirurgien-dentiste et prothésiste dentaire de Sao Paulo, Brésil et avait pour intention de lier la situation initiale du patient au résultat final de la réhabilitation. Aujourd’hui, c’est un outil très utilisé en dentisterie esthétique/réhabilitation prothétique afin de planifier numériquement un projet de traitement, le plus souvent multidisciplinaire. Bien que peu connu dans le domaine de l’Orthodontie, le Digital Smile Design se révèle être une méthode complémentaire à l’examen orthodontique classique par l’apport d’éléments supplémentaires et significatifs. Ainsi, dans des cas orthodontiques complexes et/ ou plurisciplinaires, le DSD se révèle être une méthode numérique pertinente dans la planification d’un plan de traitement orthodontique.

Summary Introduction Digital Smile Design (DSD) is a systematic protocol based on specific photographs and software analysis that is used worldwide. DSD aims to assist the practitioner in creating and planning a course of treatment, especially in a multidisciplinary approach, and provides a virtual simulation of the final result. Additionally, it is a tool that enables communication and discussion between all the dental team, including the dental laboratory, and also with the patient. Although widely described and used in prosthetic rehabilitation, this tool remains only anecdotally used in the world of orthodontics. The objective of this proof of concept was to describe the application of the Digital Smile Design protocol in the diagnosis of orthodontic treatment. Materials and methods A teenage patient was referred to our university clinic by a private orthodontic practitioner for a second opinion on the treatment at that time. The patient had a self-ligating orthodontic appliance. According to the history of the case and the oral situation at that moment, the patient required an accurately calculated plan for orthodontic tooth movement that would permit the achievement of future rehabilitation. Therefore, the decision was taken to use a DSD protocol to potentially complete the classic orthodontic examination. Results From the classic orthodontic examination, the patient presented a molar class I, midline deviations, the #21 and #23 were missing, #12 was conoid (microdontic) and, finally, #22 was in the position of #21. From the DSD results, three different views simulated the final results and therefore provided additional and relevant information, such as the correct position of the upper midline and the correct position of #12, #13, #22 and #23. Conclusion This proof of concept showed the clinical relevance of the Digital Smile Design protocol as a new tool for complex orthodontic treatment planning, especially in a multidisciplinary approach. Further publications will be necessary in order to define a specific DSD protocol for orthodontic treatment.

Introduction : La durée des traitements orthodontiques chez l’adulte reste une barrière pour ces patients. Différentes techniques notamment chirurgicales ont été développées afin de remédier à ce paramètre. La technique classique de corticotomie est efficace pour réduire le temps de traitement, mais se révèle être très invasive, générant des suites post-opératoires importantes. Matériels et méthodes : Des techniques minimalement invasives, sans élévation de lambeaux muco-périostés, ont été mises au point : corticision, micro-ostéoperforations, piézoponctures et piézocision. Résultats : La piézocision se révèle être le meilleur compromis pour accélérer le déplacement dentaire en respectant un protocole chirurgical et orthodontique bien spécifique. Elle permet également l’adjonction de biomatériaux dans les cas de déhiscences et/ou fenestrations osseuses vestibulaires associées à un encombrement modéré à sévère. Conclusion : Selon les résultats actuels, les techniques minimalement invasives de corticotomies peuvent être considérées comme un nouvel outil thérapeutique dans l’accélération du déplacement dentaire orthodontique.

Different surgical and non-surgical techniques have been developed in order to reduce the duration of orthodontic treatment. Regarding surgical techniques, corticotomies are widely used. The micro-osteoperforation technique (MOP), in addition to the piezocision technique, have been developed to provide minimally invasive surgery as an alternative to conventional corticotomies, without the elevation of a mucoperiosteal flap. Regarding non-surgical techniques, the approach is radically different in terms of physical stimuli or chemical techniques. Corticotomy and piezocision techniques have been found to be effective in accelerating orthodontic tooth movement, although the corticotomy technique presents a significant risk of postoperative treatment. These two techniques also offer the possibility of adding a bone graft using a tunneling surgical approach. Regarding non-surgical techniques, physical stimuli techniques such as with a laser are easy to perform, non-invasive and seem to be promising. However, their effectiveness has not yet been demonstrated, as is the case for chemical techniques. While at first glance these techniques are reassuringly non-invasive, do they not give the sensation of playing the sorcerer's apprentice ? Although surgical techniques seem to have demonstrated their significant efficacy in accelerating orthodontic tooth movement, non-surgical techniques do not yet provide a sufficient level of evidence and / or safety to be performed in our routine clinical practice as orthodontists. As these topics are innovative, new and future scientific evidence should be able to lead to the development of all these concepts.

To evaluate the effect of a second-stage piezocision on the biological response.60 rats were randomly allocated to 6 experimental groups of 10 rats. Rats undergoing a one-stage piezocision were sacrified on day 7, 28 and 42 (groups 1-3) while rats undergoing a two-satge piezocision were sacrified on day 42, 63 and 90 (groups 4-6), respectively. The biological response was investigated in 3D at the tissue level using Nano-computed tomography (Nano-CT) and, at the molecular level using the qRT-PCR technique. Bone Volume Fraction (BVF) loss was the primary endpoint.Similar loss of BVF were observed both after the first and second piezocisions. The change in BVF loss between 7 and 28 days after each piezocision were 25.1 ± 13.0 (SE)% and 11.2 ± 11.6 (SE)% respectively and did not differ from each other (p = 0.43). Changes in BVF loss from 7 to 42 days were also comparable in one-stage and two-stage piezocision (4.9 ± 12.3 (SE) vs. -19.9 ± 13.4 (SE), p = 0.19). At the molecular level, all parameters except Translating Ribosome Affinity Purification (TRAP) protein had identical patterns.Within the limits of the present study, a second piezocision allowed to re-induce the Regional Acceleratory Phenomenon (RAP) effect. Nevertheless, the relevance of the findings to the clinical effect has not been tested.

Summary Objective The aim of this study was to investigate the effects of piezocision (surgical protocol with sutures) in orthodontic treatment using CAD/CAM (computer-aided design and computer-aided manufacturing) customized orthodontic appliances. Design The study is designed as a parallel group, randomized controlled trial (RCT). Setting University Hospital. Ethical approval The study was approved by the ethic committee of the University Hospital Liege, Belgium. Subjects and methods This RCT was conducted on 24 adult patients requiring orthodontic treatment to release mild overcrowding. Patients were all treated with a customized appliance and randomly assigned by means of sealed envelopes containing group codes to either a test group treated with piezocision or a control group without any further treatment. A blinded orthodontist validated appliance removal or further adjustments based on the model study. Outcome measures The overall treatment time and the time between archwire changes were recorded. Moreover, clinical and radiological features such as tooth resorption, gingival recessions, and the presence of scars were evaluated. Results A total of 24 patients (12 control and 12 test) completed the study. The overall treatment time was significantly shorter in the test group than the control group. Likewise, the time difference between all arch changes was significantly lower when piezocision was performed, except for the first arch at the mandible and the last arches at both maxillae. During the fine-tuning phase, no significant difference was found between the two groups. All periodontal and radiographic parameters remained stable from the start to the end of treatment in both the groups. However, minor scars were found in 66 per cent cases. Limitations This trial was a single-centre trial. Conclusions Piezocision seems to be an effective method to accelerate orthodontic treatment in cases of mild overcrowding. However, the effect was only observed during the alignment phase and a greater efficiency was found in the maxilla. The technique may be contraindicated in patients with a high smile line since the risk of slight scarring exists. Registration ClinicalTrails.gov (Identifier: NCT03406130)

Resume Contexte La piezocision est une decortication alveolaire realisee a l’aide d’un piezotome impliquant des corticotomies mini-invasives pour accelerer les traitements orthodontiques. Le but de cette validite de concept etait de decrire un protocole innovant associant une piezocision selective avec une regeneration osseuse mini-invasive afin de reduire le risque de dehiscence des tissus vestibulaires souvent observee lors des traitements orthodontiques. Ce cas clinique avait pour objectif de rechercher si ce nouveau concept chirurgical etait pertinent. Materiels et methodes Un patient presentant une classe II dentaire asymetrique, des encombrements, une deviation des milieux et des dehiscences osseuses vestibulaires dans la region incisive mandibulaire a ete traite avec cette nouvelle approche therapeutique. Resultats Du point de vue orthodontique, la classe II dentaire, les encombrements, et les lignes medianes ont ete totalement corriges. Du point de vue parodontal, nous n’avons observe aucune recession gingivale ; cependant, les cicatrices dues a la piezocision etaient legerement visibles a la mandibule. L’imagerie postoperatoire a confirme l’absence de dehiscences osseuses. Et durant les 3 ans qui ont suivi la fin du traitement, aucune recidive n’a ete observee. Conclusion Cette nouvelle approche a suggere plusieurs avantages et pourrait etre approfondie a une plus grande echelle afin de valider ses benefices et de definir la portee de l’intervention.

Summary Objective The aim of this trial was to test whether the use of a smartphone application (app) connected to a toothbrush improves the oral hygiene compliance of adolescent orthodontic patients. Design The study was designed as a multicentre, randomized, controlled clinical trial. Setting Two academic hospitals. Ethical approval The study was approved by the ethics committee. Subjects and methods This multicentre randomized controlled trial was conducted on 38 adolescents aged 12–18 years with full-fixed orthodontic appliances. Participants were randomly assigned either to a test group that used an interactive oscillating/rotating electric toothbrush connected to a brushing aid app or to a control group that used an oscillating/rotating electric toothbrush alone. At baseline, all patients received verbal and written oral hygiene instructions. Outcome measurements Data collection was performed at T1 (baseline), T2 (6 weeks), T3 (12 weeks) and T4 (18 weeks—end of the study). At each time point, the plaque index (PI), gingival index (GI) and white spot lesion (WSL) score were recorded. Several app-related parameters were evaluated. Patient-related outcome measures were investigated in the test group. Results Test and control groups were similar at baseline except for WSL score. Between T1 and T4, PI and GI decreased significantly in both groups but evolutions were globally similar in both groups. Interestingly, at T3 (12 weeks), the PI was significantly lower in the app group than in the control group (P = 0.014). Data showed a marked decline in the use of the app over time in the test group. Conclusions This trial, conducted over 18 weeks in two academic hospitals, showed no significant effect of the use of the app in promoting oral hygiene. Trial registration Not registered

Objective: To evaluate the prevalence and the characteristics of Molar Incisor Hypomineralisation (MIH) in 7-12-year-old children in Tunis, Tunisia. Material and Methods: This study was designed as a cross-sectional study, in which school children aged 7 to 12 years were included. A total of 510 children (257 girls and 253 boys) who had their first permanent molar and incisors were evaluated using the 2003 European Academy of Paediatric Dentistry (EAPD) recommendation criteria were examined. Descriptive data analysis and Pearson’s chi-squared test were performed (p

Summary Background Piezocision is a localised piezoelectric alveolar decortication involving minimally invasive corticotomies to accelerate orthodontic treatments. The objective of this proof-of-concept was to describe an innovative protocol combining selective piezocision with minimally invasive bone regeneration to reduce the risk of buccal tissue dehiscences often observed in orthodontic treatments. This proof-of-concept initial report aimed at investigating whether this new surgical concept is relevant. Materials and methods A patient presenting an asymmetrical dental class II, overcrowdings, midline deviations and buccal bone dehiscences in the lower incisor region was treated with this new treatment approach. Results From an orthodontic point of view, the dental class II, the overcrowdings and the midlines were completely corrected. From a periodontal perspective, no gingival recession was observed; however, scars related to the piezocision were slightly visible at the mandible. The post-imaging demonstrated the absence of bone dehiscences. Up to 3 years after the completion of the treatment, no relapse was observed. Conclusion This novel approach suggested several advantages and may be further investigated at a larger scale in order to validate the benefits and to define the scope of intervention.

The duration of orthodontic treatment in adults remains a barrier for some patients. Some surgical techniques have been developed in order to accelerate orthodontic tooth movement. The technique of corticotomies is effective in decreasing the orthodontic treatment time but remains invasive, leading to significant postoperative consequences.Minimally invasive techniques without muco-periosteal flap elevation have been developed: corticision, micro-osteoperforations, piezopuncture and piezocision.The piezocision procedure seems to be the best compromise to accelerate orthodontic tooth movement while respecting a specific surgical and orthodontic protocol. The piezocision surgery allows the addition of biomaterials in cases of dehiscence and/or fenestration on the alveolar bone associated with moderate to severe overcrowding.According to current publications, minimally invasive corticotomy techniques can be viewed as a new therapeutic tool in the acceleration of orthodontic tooth movement.

To explore patient-related outcomes measures (PROMs) of piezocision-assisted orthodontic treatment compared to a conventional orthodontic treatment using customized appliance. Twenty-four adult patients requiring orthodontic treatment for mild-to-moderate overcrowding in both jaws were randomly assigned to a test group, treated with a piezocision-assisted orthodontic treatment, or to a control group, where piezocision was not applied. The patient-related outcomes were recorded using a 0–10 visual analog scale (VAS). Daily analgesic consumption and pain level were also recorded following the placement of the orthodontic appliance in both groups and after the piezocision procedure in the test group. Moreover, levels of apprehension and satisfaction were also assessed in both groups. In the piezocision group, over the 7-day period, paracetamol consumption was comparable after the placement of the orthodontic appliance and after the piezocision surgery. Pain levels after the orthodontic and the surgical procedure decreased with time (p

Objectives: To assess patient compliance and treatment efficacy of preventive expansion treatment with removable Planas functional appliances using an integrated microsensor. Materials and Methods: Wear time (WT) and behavior of 69 patients undergoing treatment with Planas functional appliances were assessed and analysed using TheraMon microsensors (Gschladt, Hargelsberg, Austria). Patients were followed up for a period of 9 months, and visits were made every 3 months to download WT data from the microsensor and to assess wearing behavior. From individual WT graphs,10 parameters were derived to characterize compliance for each patient. Treatment efficacy was measured by eight parameters determining the level of expansion after 9 months of treatment. Results: Patients wore their device on average 15.8 ± 5.2 h/d. WT was unrelated to age and gender, but it was positively influenced by patient habits when keeping appliances during eating, sports, care and handling. Treatment efficacy in terms of intercanine and intermolar expansion was 4.4 ± 1.9 mm and 4.6 ± 2.0 mm for the maxilla, and 5.3 ± 2.0 mm and 4.7 ± 2.3 mm for the mandible, respectively. Efficacy was negatively affected by poor compliance (WT < 9 h/d) and by high variability of within-subject WT recordings. Conclusions: Perfect compliance is not necessary to achieve treatment success, but patients should exhibit sufficient wear time to allow maxillary expansion to occur. The TheraMon microsensor offers a new perspective and aid to individualize treatment prescriptions.

A total of 154 adult patients with sleep complaints underwent a polysomnography and a craniofacial cone beam computed tomography (CBCT). OSA was defined as an apnea and hypopnea index (AHI) or an oxygen desaturation index (ODI) ≥ 10. Soft tissues and craniofacial bones volumes were prospectively measured by CBCT and collected blindly from sleep polysomnography. Among the study patients, 127 (83%) suffered from OSA and 27 (17%) did not. OSA patients demonstrated a narrower maxillo-palatine core volume (11.7±3.2 vs 14.6±4.9cm3) even when adjusting for age, gender, height, neck circumference and body mass index. These upper airway measures provide a comprehensive analysis of bony structures and soft tissues, which can be involved in OSA.