An conceptual approach towards the etiology of peri-implant marginal bone loss: 
Is Marginal Bone Loss around Oral Implants the Result of a Provoked Foreign Body Reaction?(T. Albrektsson, Dahlin C, Jemt T, Sennerby L, Turri A, Wennerberg A. )
Clin Implant Dent Relat Res. 2014 Apr;16(2):155-65.       

An evidence-based review on implant-supported cantilevered FDPs: 
Implant-supported cantilevered fixed partial dentures (Ben Balevi)
Evid Based Dent. 2010; 11(2):48-9.                                 

A systematic review of clinical outcomes of GBR procedures:
Clinical outcomes of GBR procedures to correct peri-implant dehiscence & fenestration: a systematic review (Chiapasco M, Zaniboni M)
Clin Oral Implants Res. 2009 Sep; 20 Suppl 4:113-23 

A systematic review of the success of direct sinus lift and implant survival:
A systematic review of the success of sinus floor elevation & survival of implants inserted in combination ... (Tan WC, Lang NP, Zwahlen M, Pjetursson BE) 
J Clin Periodontol 2008; 35 (Suppl. 8): 216–240

A systematic review of the prognosis of short (< 10 mm) implants:
A systematic review of the prognosis of short (< 10 mm) dental implants placed in the partially edentulous patient (Telleman G, Raghoebar G, Vissink, den Hartog, Huddleston Slater J, Meijer HJ).
J Clin Periodontol 2011; 38: 667–676

A randomized controlled trial: Platform switching and bone loss:
Effect of platform switching on peri-implant bone levels: a randomized clinical trial
(Enkling N, Jöhren P, Klimberg V, Bayer S, Mericske-Stern R, Jepsen S)
Clin Oral Implants Res. 2011 Oct; 22(10):1185-92


Dose non-axial occlusal forces on implant-supported restorations cause marginal bone loss?
Evidence-based considerations for removable prosthodontic and dental implant occlusion: a literature review. 
(Taylor TD, Wiens J, Carr A. )
J Prosthet Dent. 2005 Dec;94(6):555-60.


Long-term Complications Associated with Implant-supported Complete Fixed Dental Prosthesis
(Babak Shokati, Asbjorn Jokstad)