[4] Walter C,Weiger R,Zitzmann NU. Periodontal surgery in furcation-involved maxillary molars revisited--an introduction of guidelines for comprehensive treatment [J]. Clin Oral Investig,2011,15(1):9-20.
[5] Newell DH. The diagnosis and treatment of molar furcation invasions [J]. Dent Clin North Am,1998,42(2):301-337.
[6] Hempton T,Leone C. A review of root resective therapy as a treatment option for maxillary molars [J]. J Am Dent Assoc,1997,128(4):449-455.
[7] Gher MW Jr,Dunlap RW. Linear variation of the root surface area of the maxillary first molar [J]. J Periodontol,1985,56(1):39-43.
[9] Yuh DY,Cheng GL,Chien WC,et al. Factors affecting the treatment decisions and outcome of root-resected molars:A nationwide study [J]. J Periodontol,2013,Jan 17,[Epub ahead of print].
[11] Hill RW,Ramfjord SP,Morrison EC,et al. Four types of periodontal treatment compared over two years[J]. J Periodontol,1981,52(11):655-662.
[12] Pihlstrom BL,Oliphant TH,McHugh RB. Molar and non-molar teeth compared over 6-1/2 years following two methods of periodontal therapy [J]. J Periodontol,1984,55(9):499-504.
[13] Lindhe J,Westfelt E,Nyman S,et al. Long-term effect of surgical /non-surgical treatment of periodontal disease [J]. J Clin Periodontol,1984,11(7):448-458.
[14] Parashis AO,Anagnou-Vareltzides A,Demetriou N. Calculus removal from multirooted teeth with and without surgical access.(Ⅰ). Efficacy on external and furcation surfaces in relation to probing depth [J]. J Clin Periodontol,1993,20(1):63-68.
[15] Parashis AO,Anagnou-Vareltzides A,Demetriou N. Calculus removal from multirooted teeth with and without surgical access. Ⅱ. Comparison between external and furcation surfaces and effect of furcation entrance width [J]. J Clin Periodontol,1993,20(4):294-298.
[16] Schroer MS,Kirk WC,Wahl TM,et al. Closed versus open debridement of facial grade Ⅱ molar furcations [J]. J Clin Periodontol,1991,18(5):323-329.
[17] Fugazzotto PA. A comparison of the success of root resected molars and molar position implants in function in a private practice:results of up to 15-plus years [J]. J Periodontol,2001,72(8):1113-1123.