Portland cement with additives in the repair of furcation perforations in dogs

Abstract

PURPOSE:To evaluate the use of Portland cements with additives as furcation perforation repair materials and assess their biocompatibility. METHODS:The four maxillary and mandibular premolars of ten male mongrel dogs (1-1.5 years old, weighing 10-15 kg) received endodontic treatment (n=80 teeth). The furcations were perforated with a round diamond bur (1016 HL). The perforations involved the dentin, cementum, periodontal ligament, and alveolar bone. A calcium sulfate barrier was placed into the perforated bone to prevent extrusion of obturation material into the periradicular space. The obturation materials MTA (control), white, Type II, and Type V Portland cements were randomly allocated to the teeth. Treated teeth were restored with composite resin. After 120 days, the animals were sacrificed and samples containing the teeth were collected and prepared for histological analysis. RESULTS:There were no significant differences in the amount of newly formed bone between teeth treated with the different obturation materials (p=0.879). CONCLUSION:Biomineralization occurred for all obturation materials tested, suggesting that these materials have similar biocompatibility.Key words: Biocompatible Materials. Calcium Sulfate. Dental Cements. Furcation Defects. Dogs. RESUMO OBJETIVO:Avaliar o uso de cimentos Portland aditivados na reparação de perfurações radiculares e a biocompatibilidade destes materiais. MÉTODOS:Oitenta pré-molares, quatro da arcada dentária superior e quatro da arcada inferior de 10 cães machos, sem raça definida, com idade em torno de um a um ano e meio, pesando entre 10 e 15 kg foram submetidos a tratamento endodôntico, sendo realizadas perfurações nas furcas com broca de diamante 1016 HL. A cavidade envolveu dentina e cemento, como também periodonto e o osso alveolar. Na porção óssea da obturação, barreira de sulfato de cálcio foi utilizada evitando extravasamento do cimento para o espaço periodontal. Foi realizada a distribuição randomizada dos cimentos MTA (controle), Portland tipo II, Portland tipo V e Portland branco estrutural nas obturações. Os dentes foram restaurados com resina composta. Após 120 dias realizou-se eutanásia, retirada dos dentes, preparação e análise histológica. RESULTADOS:Entre os cimentos não houve diferença estatística significante quanto à neoformação óssea (p=0,879). CONCLUSÃO:Ocorreu biomineralização com os diferentes cimentos usados no estudo, sugerindo que estes são similares em termos de biocompatibilidade.Descritores: Materiais Biocompatíveis. Sulfato de Cálcio. Cimentos Dentários. Defeitos da Furca. Cães.Silva Neto JD et al.

Analysis of Metal Contents in Portland Type V and MTA-Based Cements

“…Usually, Type I PC is the main material of MTA-based cements [8–10, 14], but when new material is proposed for this end, the investigations should be conducted again. Type V PC can be used as alternative material to substitute MTA-based cements for clinical practice [3, 4]. However, more than understanding the behavior of these materials in the organism, for safe clinical use, it is necessary to study their compositions.…”

“…The most frequent complications are related to root canal deviations (apical transportation), instrument breakage, and radicular perforation [1, 2]. For treatment in cases of perforation, the access can occur by endodontic procedures, in an orthograde manner, or by surgical procedures, in the external tooth root area [1–4]. Apicectomy with retrograde filling is defined as apical root resection, followed by cavity confection and subsequent filling with a proper material [5].…”

“…In 1993, at the University of Loma Linda in the United States, a new MTA- (Mineral Trioxide Aggregate-) based cement, indicated for sealing perforating areas in human teeth, was developed. The results showed excellent physical [6–8], chemical [9, 10], and biological properties [3, 4]. …”

“…Based on the biocompatibility [3, 4] and similar compositions of MTA-based cements [11], pure PC has been proposed to be potential substitute to MTA in endodontic procedures [5–8]. It is known that the main compound of MTA-based cements is the ordinary Type I PC [5, 8].…”

“…The biocompatibility of Type V PC had been proved in animal studies by the observation of biomineralization areas [3, 4]. On the other hand, studies have shown the presence of contaminant metals, which were aggregated during the production process as a result of the substitution of the primary fuel by alternative fuels [16–18].…”