不同模擬形式與程度的齒槽骨缺損對牙齒動搖度之共振響應分析

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不同模擬形式與程度的齒槽骨缺損對牙齒動搖度之共振響應分析

Resonance Frequency Analysis of the Influence of Various Simulated Types and Degree of Alveolar Bony Defects on Tooth Mobility

余俊杰 , Masters　　Advisor：林哲堂;李勝揚　　

繁體中文

有限元素分析法；共振頻率； finite element analysis ； resonance frequency

Abstract │ Reference (29) │ Times Cited (3) │ Altmetrics

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To assess the influence of various simulated types and degrees of alveolar bony defects on tooth mobility, 3-D finite element models of the human maxillary central incisor, canine and first molar were established. To simulate periodontal attachment loss, the bone elements of these models were deleted between 3mm to 10mm in 1mm decrement from cementum-enamel junction (CEJ). Resonance frequency values (RFV) of simulated one-side, two-side and three-side bony defects were calculated for comparison and discussion. The results showed that RFV of teeth was closely related to their surrounding bone level. When the horizontal bone loss was simulated, the RFV of the teeth demonstrated liner relationships with their attachment levels. On the other hand, when the vertical bony defect was simulated using these three tooth models, different effects of surrounding bone on the mobility of the teeth were observed. For the model of upper central incisor, the resonance frequency decreasing ratio (RFDR) with the bony defect at facial side, lingual side, mesial side and distal side were 8.2%, 14.1%, 12.7% and 11.7%, respectively. This means that the alveolar bone at the lingual side contributed more effect on the mobility of incisor than that of the facial side. However, the effect of alveolar bone of the mesial side was closely to the distal side. Different phenomena were observed in the model of canine, the RFDR with bony defects at facial side, lingual side, mesial side and distal side were 2.3%, 1.4%, 11.8% and 9.3%, respectively. This means that the alveolar bone at lingual side contributed similar effects on the mobility of incisor to that at facial side, and the effect of alveolar bone of mesial side was also similar to that at distal side. For the model of upper first molar, the RFDR with bony defects at buccal side, palatal side, mesial side and distal side were 5.5%, 2.3%, 17.2% and 23.1%, respectively. That is, the alveolar bone at buccal side contributed more effect on the mobility of molar than at palatal side. However, the effect of alveolar bone at mesial side demonstrated more effect on the mobility of molar than at distal side. Another noted finding is that the furcation of alveolar bone played a major role on the tooth mobility of first molar. These results suggested that vibration analysis method could be a useful, auxiliary clinical tool in the diagnosis of periodontal attachment loss.

Reference ( 29 ) 〈TOP〉

參考文獻李豪富 (2000)，上顎中切齒動態有限元素模擬與分析，碩士論文，台北醫學大學. 孫安迪 (1992)，牙齒與口腔疾病，健康雜誌出版社，台北，pp. 29-30.
連結：
Armitage GC, Svanberg GK, Löe H (1977). Microscopic evaluation of clinical measurements of connective tissue attachment level. J Clin Periodontol, 4:173-190.
連結：
Ash MM, Jr (1993). Dental Anatomy In “Physiology and Occlusion”. WB Saunders Co., New York, pp.130. Carranza FA, Newman MG (1996). Clinical Periodontology. WB Saunders Co., Philadelphia, pp.
連結：
Holmes DC, Loftus JT (1997). Influence of bone quality on stress distribution for endosseous implants. J Oral Impl, 23: 104-111.
連結：
Huang HM, Yeh CY, Pan LC, Lee S-Y (2001). Factors influencing the dynamic behavior of human teeth. Med & Biol Eng & Comput, 39:176-181.
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