ABSTRACT
BACKGROUND: Regardless of the kind of biomaterial used for the graft, it is clear that, over time, the graft undergoes dimensional changes that could influence the final bone volume obtained, which could alter the stability of the installed implants. The aim of the present study was to compared and correlated the graft behavior with the amount (in grams) of xenogeneic and alloplastic biomaterials used in grafts for maxillary sinus lift. MATERIAL AND METHODS: This retrospective cohort study used 148 CBCT images of 74 grafts from 68 maxillary sinuses lift patients in a university, post-graduate clinic. The weights of biomaterials, categorized in intervals according to amount used, were correlated with the graft volumes at V1 (10 days) and V2 (180 days). Kruskal-Wallis test was used to evaluate the possible bias effect of weight on graft maintenance. RESULTS: Mean weights of biomaterials used were: Bio-Oss Small® (1.58g); Bio-Oss Large® (1.35g); Endobon® (0.72g); BoneCeramic®+Emdogaim® (0.96g); Cerasorb® (1.13g) and Osteogen® (2.70g). No significant differences (p>0.05). Were found for the influence of these mean amounts in graft maintenance: Bio-Oss Small® (18); Bio-Oss Large® (10); Endobon® (17); BoneCeramic®+Emdogaim® (10); Cerasorb® (11); and Osteogen® (08) at V1 and V2. However, when biomaterials were categorized by intervals, all Cerasorb® interval groups showed statistically significant differences (p<0.001) in graft volume at V2. CONCLUSIONS: The amounts of the biomaterials used could influence the final volume; depending on the biomaterial characteristics. Implant installation was possible with all studied grafts, although graft volume shrinkage should be considered when selecting biomaterial for sinus lift. Key words:Biocompatible materials; cone beam computed tomography; maxillary sinus; hydroxyapatites.
ABSTRACT
ABSTRACT Mesiodens is the term used for describing the supernumerary tooth that occurs in the maxilla, between the central incisors, in the midline region. These may erupt in the oral cavity or keep themselves impacted. Their presence causes cleaning inadequate, impossibility or difficult of the eruption of the regular teeth and having the aesthetic compromised. This paper aims at showing that early identification of supernumerary teeth, planning and correct approach, allow the preservation of the teeth and adjacent structures. This article presents the clinical case of a seven-year-old child, male, who sought for treatment complaining that teeth 11 didn't appear in the buccal cavity. Clinical and radiographic exams were done and they demonstrated the presence of the supernumerary tooth. The plan of treatment aimed at the correct localization, extraction of this supernumerary tooth and continuous follow up of the case.
RESUMO Mesiodens é o termo utilizado para denominar o dente supranumerário que ocorre na maxila, entre os incisivos centrais, na região de linha média. Esses podem irromper na cavidade oral ou ficarem impactados. A sua presença acarreta higienização inadequada, dificuldade ou impossibilidade de erupção dos dentes regulares e comprometimento da estética. O presente trabalho objetiva mostrar que a identificação precoce de dentes supranumerários, o planejamento e abordagem corretas, permitem a preservação dos dentes e estruturas adjacentes. Este artigo apresenta o caso clínico de criança de 7 anos de idade, gênero masculino, cujos pais procuraram por tratamento com queixa de não esfoliação do dente 51. Foram realizados exames clínicos e radiográficos e estes demonstraram a presença de dente supranumerário invertido. O plano de tratamento teve por objetivo a correta localização, exodontia do mesiodens que não irromperia por ser invertido; e contínuo acompanhamento do caso.
