Table 1. Data Extraction and Analysis of Included Studies in the Systematic Review.

Journal and year	Author	Tooth model for testing	Models of post materials created for finite element analysis	Models of core materials created for finite element analysis	Models of crown materials created for finite element analysis	Software for FEA	Forces used and area of stress induction	Results
1. Biomaterials 2002	Pegoretti.A et al [6].	Maxillary central	Cast metal, carbon fiber, fiber reinforced, gold cast post	Composite core	Porcelain	MSC Marc (MSC software corporation)	100N, vertical 50N, oblique 10N, horizontal	Glass fiber composite shows less stress inside the root with force concentration in the cervical region.
2. Chinese Journal of Stomatology 2004	Chen.XT et al [7].	Maxillary central	Cast NI-CR (nickel-chromium), titanium alloy, cast gold, glass fiber, polyethylene fiber reinforced.	Composite core	PFM	Not mentioned	100N	Materials with elastic modulus similar to that of dentin such as polyethylene fiber-reinforced composite may be suitable for post restoration.
3. Operative Dentistry 2006	Barjau.E et al [8].	Maxillary central	Glass fiber, stainless steel			MSC Marc (MSC software corporation)	300N, palatal, 30 degrees	Glass fiber is better, the elastic modulus of the post is similar to that of dentin and the core has better performance.
4. Journal of Oral Rehabilitation 2006	Boschian Pest. L et al [9].	Lower first pre-molar	Carbon fiber, glass fiber, mineral	composite	All gold	MSC Marc(MSC software corporation)	486N, masticatory surface	Fiberglass reinforced composite, better than titanium/stainless steel.
5. European Journal of Dentistry 2007	Adanir.N et al [10].	Maxillary central incisors	Stainless steel, titanium, gold alloy, glass fiber, carbon fiber	Composite core		Structural Analysis Program 2000 (SAP 2000) (computer and structures, incorporated)	200N, vertical, 45 degrees, palatal	Glass fiber posts revealed more balanced stress distribution under functional forces.
6. Dental Material Journal 2008	Okada.DJ et al [11].	Maxillary central	Stainless steel, titanium, glass fiber post	Composite cores	Gold silver palladium alloy crown	MSC Marc (MSC Software Corporation)	Central occlusal surface, chewing force detected by sensors	Glass fiber post is more suitable for post fabrication.
7. Dental Material Journal 2009	Coelho.CS et al [12].	Maxillary central incisors	Cast Cu-Al (copper-aluminum) post, stainless steel, fiberglass, carbon fiber, zirconia dioxide, titanium	Composite core	Leucite-reinforced all ceramic	ANSYS (Analysis Systems) (ANSYS, Inc)	10N, palatal, 45 degrees	The use of custom cast posts, stainless steel posts, zirconia posts, and titanium posts resulted in increased stress in the post itself when compared to glass fiber posts and carbon fiber posts. A non-metallic post system results in improved mechanics of the weakened tooth.
8. Biomedical Materials 2010	Papadopoulos.T et al. [13].	Maxillary central incisors	Titanium, carbon fiber, glass fiber	Composite core	ceramic	MSC Marc (MSC Software Corporation)	400N, palatal, 45 degrees	Glass fiber post reduces the interfacial stress in post/core and post/tooth adhesion.