1. 5) A Textbook of Fixed Prosthodontics –The Scandinavian Approach –. Karlsson S, Nilner K, Dahl B, editors, : Gothia Fortbilding, Sweden; 2013.
2. 6) Nevins M. Attached gingiva--mucogingival therapy and restorative dentistry. Int J Periodontics Restorative Dent 1986; 6: 9–27.
3. 7) Ericsson I, Lindhe J. Lack of significance of increased tooth mobility in experimental periodontitis. J Periodontol 1984; 55: 447–452.
4. 8) Nyman S, Lindhe J. A longitudinal study of combined periodontal and prosthetic treatment of patients with advanced periodontal disease. J Periodontol 1979; 50: 163–169.
5. 9) Yi SW, Ericsson I, Carlsson GE, Wennstrom JL. Long-term follow-up of cross-arch fixed partial dentures in patients with advanced periodontal destruction. Evaluation of the supporting tissues. Acta Odontol Scand 1995; 53: 242–248.