Assessment of interproximal enamel reduction planned by the digital set-up of a customized lingual orthodontic appliance: A comparison cohort study.

Objectives: Interproximal enamel reduction (IER), commonly known as stripping, is a frequently used technique in orthodontic treatment to address issues related to arch length discrepancies and tooth size discrepancies (TSD). The use of digital set-up allows for precise prediction of the amount of IER required. TSD occurs when the sizes of maxillary and mandibular teeth are not in proportion to each other. This study aims to evaluate and compare the suggested IER values generated by the digital set-up of a customized lingual orthodontic appliance in both upper and lower arches, across sextants, and among different teeth concerning TSD. Materials and methods: We analyzed suggested IER values from 809 cases. The statistical analysis was divided into two parts: part 1 focused on the number of stripped surfaces, and part 2 assessed the quantity of enamel removed. Comparisons were made between upper and lower arches, sextants, and teeth using the Friedman test, followed by pairwise Wilcoxon tests with Bonferroni correction. Results: The study found that mandibular and frontal stripping were more frequently suggested than maxillary and posterior stripping. Lower canines were the teeth most commonly recommended for stripping, followed by upper incisors. Conclusion: Within the scope and limits of this cohort study, we conclude that, in general, more IER is required in the mandible as compared to the maxilla. Particularly in the anterior sextants, IER might be necessary to achieve optimal alignment and occlusion.

The effect of various adhesives, enamel etching, and base treatment on the failure frequency of customized lingual brackets: a randomized clinical trial.

Objectives: The aim of this paper was to compare failure differences in precious metal customized lingual brackets bonded with three adhesive systems. Also, differences in failure of non-precious metal brackets with and without a silicatized base layer bonded with the same adhesive, as well as the influence of enamel etching prior to using a self-etching dual cure resin were explored. Materials/methods: Five different groups were defined in a semi-randomized approach. Group 1 (IME): Maxcem Elite with 378 Incognito brackets and etched teeth, Group 2 (IMNE): Maxcem Elite with 193 Incognito brackets on non-etched teeth, Group 3 (INE): Nexus+Excite with 385 Incognito brackets, Group 4 (IRE): Relyx with 162 Incognito brackets, Group 5 (HRME) and Group 6 (HNRME): Maxcem Elite with 182 Harmony brackets with silicatized and non-slicatized bases respectively. Bracket failures were recorded over a 12-month period. Results: The number of failures during the observation period was small in the various adhesives types of groups, as well as in HRME and HNRME groups, and the comparisons among those groups were non-significant (P > 0.05). A statistically significant difference (P < 0.05) was found between the IME and IMNE groups. Conclusions: 1. During the first year of treatment customized lingual brackets failure frequencies (rates) are not different for the three adhesive materials tested. 2. Eliminating the etching stage when using self-etch/self-adhesive adhesives, may lead to a dramatic increase in the failure rates. 3. Silicoating of stainless steel customized lingual brackets does not seem to influence the failure of the bonds.

Transitional prosthodontic treatment on implant: A new orthodontic proposal.

This article describes a new alternative for first-line transitional prostheses in a case of extensive anterior restoration. The patient, a 51-year-old woman, presented with a loose fixed partial denture. Poor bone density prevented immediate loading and, because of her work, she would not accept to wear a removable partial denture. After extractions, implant therapy was carried out using a new type of fixed transitional denture, which was easy to install. The healing process was protected and a removable prosthesis was avoided. The clinical and laboratory steps are described. Six months later, osseointegration was complete. This transitional prosthesis was comfortable to wear and provided satisfactory aesthetics and function.

[Methods for bonding Incognito brackets using a chemo-polymerizable bonding agent]. / Procédure de collage des attaches Incognito à l'aide d'une colle chémopolymérisable.

An indirect method is used to bond Incognito attachments. This article will give a step-by-step outline of the procedure that employs a traditional chemo-polymerized bonding agent carried in a silicone splint. Using this guide, every practitioner will be able to use a proven technique to achieve the same anticipated results.

[Methods for bonding Incognito brackets using a photo-polymerizable bonding agent]. / Procédure de collage des attaches Incognito à l'aide d'une colle photopolymérisable.

The bonding procedures used in the Incognito system are now well known. Practitioners can work with either a protocol for Maximum-cure which utilizes a hydrophobic and chemo-polymerizable adhesive or an adhesive that is dual and hydrophilic, the association Nexus 3/Excite. Clinically the two protocols provide equivalent results in the quality of the bonding seal for attachments. They are simple to use, but in applying them practitioners must scrupulously follow the manufacturer's recommended stages of procedure.