Kehilangan gigi salah satunya dapat diganti dengan gigi tiruan cekat untuk mengembalikan fungsi oklusi dan estetis. Bahan gigi tiruan cekat antara lain porcelain fused to metal (PFM), namun PFM memiki beberapa keterbatasan diantaranya memerlukan preparasi gigi abutment cukup banyak yang dapat mempengaruhi vitalitas pulpa, salah satu alternatifnya digunakan fiber reinforced composite (FRC). Paparan saliva terhadap resin komposit menimbulkan proses penyerapan air yang mengakibatkan terjadinya perubahan dimensi. Tujuan penelitian untuk menganalisis perbedaan perubahan dimensi Glass fiber non dental reinforced composite antara setelah 7 hari dan 14 hari perendaman dengan saliva buatan. Metode: Jenis penelitian ini adalah penelitian eksperimental laboratorium. Bahan penelitian yang digunakan yaitu FRC dengan matriks berupa resin komposit flowable (Master Flow, Brazil) dan Glass fiber non dental. Sampel penelitian berbentuk balok ukuran 25x2x2mm, sampel disinari menggunakan LCV selama 20 detik. Sampel berjumlah 8 buah dibagi menjadi 2 kelompok yaitu lama perendaman 7 dan 14 hari. Sampel direndam dalam saliva buatan dengan pH 7. Perubahan dimensi dihitung dengan dimensi akhir dikurang dimensi awal, diukur menggunakan caliper. Hasil: Analisa statistik menggunakan mann-whitney diperoleh nilai p = 0,017<0,05 artinya terdapat perbedaan perubahan dimensi Glass fiber non dental reinforced composite. Simpulan: Semakin lama Glass fiber non dental reinforced composite direndam dalam saliva buatan maka semakin besar perubahan dimensi yang terjadi. Kata kunci: Perubahan dimensi, glass fiber non dental reinforced composite, lama perendaman, saliva buatan. The difference in immersion time of non-dental reinforced composite glass fiber in artificial saliva on dimensional changes
Background: Tooth extraction is an important measure in determining oral health status because it generally reflects untreated periodontal tissue disease and caries. Tooth extraction can also be used as a measure of people's knowledge and motivation in maintaining their teeth. The higher the revocation rate, the lower the community's knowledge and motivation. Purpose: The aim of this study is to see the main reasons for tooth extraction in children who are in the pedodontics of the RSGM Baiturrahmah. Material and Methods: This type of research is quantitative with analytic descriptive methods. The target population of this study were students of coass Lab Paedodonti RSGM Baiturrahmah in October-December 2019, with a sample of 76 people. The research was conducted at the Paedodonti Lab RSGM Baiturrahmah in October-December 2019 using a questionnaire. Data analysis using SPSS program with chi square analysis. Results: The distribution of reasons for deciduous tooth extraction is presented, it is found that most of the reasons for extracting deciduous teeth in primary school children are physiological mobility, as many as 53 people (69.7%). In addition, there were 19 people (25%) of the reasons for removal because of excessive retention of 1 person (1.3%), and because of the request of patients / parents as many as 3 people (3.9%). Conclusion: The main reason for the extraction of deciduous teeth in elementary school children at the Lab Paedodonti RSGM Baiturrahmah, was physiological mobility, with the teeth that were often extracted were the mandibular incisors in the 7 year age group.
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