1.1. Clinical Studies

1. d'Hoedt B, Schulte W:
   [Possibilities and long term results of use of Tubingen implants (Frialit)].
   Zwr; 1987; 96 (2): 118-121
       
2. d'Hoedt B, Schulte W:
   A comparative study of results with various endosseous implant systems.
   Int J Oral Maxillofac Implants; 1989; 4 (2): 95-105
         
3. De Wijs FL, Van Dongen RC, De Lange GL, De Putter C:
   Front tooth replacement with Tubingen (Frialit) implants.
   J Oral Rehabil; 1994; 21 (1): 11-26
      
4. Engel E, Gomez-Roman G, Axmann-Krcmar D:
   Effect of occlusal wear on bone loss and Periotest value of dental implants.
   Int J Prosthodont; 2001; 14 (5): 444-450
       
5. Kondell PA, Soder PO, Landt H, Frithiof L, Anneroth G, Engstrom PE, Olsson ML:
   Gingival fluid and tissues around successful titanium and ceramic implants. A comparative clinical, laboratory, and morphologic study.
   Acta Odontol Scand; 1991; 49 (3): 169-173
       
6. Scipioni A, Bruschi GB, Calesini G:
   The edentulous ridge expansion technique: a five-year study.
   The International journal of periodontics & restorative dentistry; 1994; 14 (5): 451-459
     
7. Stuge U, Ellingsen JE:
   [Frialit ceramic implants - a four-year follow-up study].
   Nor Tannlaegeforen Tid; 1991; 101 (9): 296-303 

1.2. Retrospective Studies

1. Noack N, Willer J, Hoffmann J:
   Long-term results after placement of dental implants: longitudinal study of 1,964 implants over 16 years.
   Int J Oral Maxillofac Implants; 1999; 14 (5): 748-755      

1.3. Literature Reviews

1. Albrektsson T, Zarb G, Worthington P, Eriksson AR:
   The long-term efficacy of currently used dental implants: a review and proposed criteria of success.
   Int J Oral Maxillofac Implants; 1986; 1 (1): 11-25
       
2. Albrektsson T, Sennerby L, Wennerberg A: 
   State of the art of oral implants.
   Periodontol 2000; 2008; 47 (1): 15-26
       
3. Andreiotelli M, Wenz HJ, Kohal RJ:
   Are ceramic implants a viable alternative to titanium implants? A systematic literature review.
   Clin Oral Implants Res; 2009; 20 Suppl 4 32-47
       
4. Hartmann HJ, Wittal CG:
   Progress in implantology: developments from the Tübinger Implantat to the Frialit-2.
   European Dentistry; 1995; (1): 32-34
       
5. Kohal RJ, Att W, Bachle M, Butz F:
   Ceramic abutments and ceramic oral implants. An update.
   Periodontol 2000; 2008; 47 224-243
       
6. Lambrecht JT, Cardone E, Kuhl S:
   Status report on dental implantology in Switzerland in 2006. A cross-sectional survey.
   Eur J Oral Implantol; 2010; 3 (1): 71-74

2.1. Success Rates

1. d'Hoedt B, Schulte W:
   [Possibilities and long term results of use of Tubinger implants (Frialit)].
   Zwr; 1987; 96 (2): 118-121
       
2. d'Hoedt B, Schulte W:
   A comparative study of results with various endosseous implant systems.
   Int J Oral Maxillofac Implants; 1989; 4 (2): 95-105
       
3. De Wijs FL, Van Dongen RC, De Lange GL, De Putter C:
   Front tooth replacement with Tubingen (Frialit) implants.
   J Oral Rehabil; 1994; 21 (1): 11-26
      
4. Noack N, Willer J, Hoffmann J:
   Long-term results after placement of dental implants: longitudinal study of 1,964 implants over 16 years.
   Int J Oral Maxillofac Implants; 1999; 14 (5): 748-755
      
5. Scipioni A, Bruschi GB, Calesini G:
   The edentulous ridge expansion technique: a five-year study.
   The International journal of periodontics & restorative dentistry; 1994; 14 (5): 451-459'
      
6. Stuge U, Ellingsen JE:
   [Frialit ceramic implants - a four-year follow-up study].
   Nor Tannlaegeforen Tid; 1991; 101 (9): 296-303        

2.2. Bone Loss

1. d'Hoedt B, Schulte W:
   [Possibilities and long term results of use of Tubinger implants (Frialit)].
   Zwr; 1987; 96 (2): 118-121
       
2. d'Hoedt B, Schulte W:
   A comparative study of results with various endosseous implant systems.
   Int J Oral Maxillofac Implants; 1989; 4 (2): 95-105
      
3. De Wijs FL, De Putter C, Cune MS:
   Front tooth replacement with Tubingen (Frialit) implants: a radiographical evaluation.
   J Oral Rehabil; 1996; 23 (2): 97-100

3.1. Animal Studies

1. Schulz P, Heimke G, Krempien B, Kristen K, Muhleisen W, Singer R:
   [Single tooth implants made of aluminum oxide ceramic in the beagle lateral tooth area and for anterior tooth diastemata in the adolescent patient].
   Dtsch Zahnarztl Z; 1981; 36 (9): 599-606
       
2. Zetterqvist L, Anneroth G, Nordenram A:
   Tissue integration of Al2O3-ceramic dental implants: an experimental study in monkeys.
   Int J Oral Maxillofac Implants; 1991; 6 (3): 285-293
       
3. Zetterqvist L, Anneroth G, Nordenram A, Wroblewski R: 
   X-ray microanalytical and morphological observations of the interface region between ceramic implant and bone.
   Clin Oral Implants Res; 1995; 6 (2): 104-113

1. Kellett M, Smith GA:
   The epithelial interface with osseointegrated implants.
   Dent Health (London); 1991; 30 (3): 6-9, 12
       
2. Quayle AA, Cawood J, Howell RA, Eldridge DJ, Smith GA:
   The immediate or delayed replacement of teeth by permucosal intra-osseous implants: the Tubingen implant system. Part 1. Implant design, rationale for use and pre-operative assessment.
   Br Dent J; 1989; 166 (10): 365-370
      
3. Schulte W, Heimke G:
   [Ceramic endosseous implants with an aluminum oxide base (Tubingen-type Frialit)].
   Chir Dent Fr; 1980; 50 (90): 41-45

1. Stuge U, Brodin P, Bjornland T:
   Masseter muscle reflex evoked by tapping on osseointegrated Frialit implants.
   Int J Oral Maxillofac Implants; 1993; 8 (6): 650-654