Mesut TUZLALI | Inönü üniversitesi (original) (raw)
Papers by Mesut TUZLALI
Acta Physica Polonica A, Sep 1, 2017
The main goal of nanoindentation tests is to obtain elastic modulus and hardness of the specimen ... more The main goal of nanoindentation tests is to obtain elastic modulus and hardness of the specimen material from load-displacement measurements. With this study, it was aimed to establish a quantitative relationship between the nanomechanical properties of commonly used dental cements in comparison to a newly developed crown cement and to predict its performance potential. Nanomechanical properties of polycarboxylate cement (PCC), glass-ionomer cement (GIC), dual-cure self-adhesive cement (SAC) and a newly developed glass-carbomer cement (GCC) were investigated by nanoindentation tests. All samples were fabricated according to their respective manufacturer's instructions. Available damage on the surface due to manipulation was removed by grinding with 1200, 2400 and 4000 grit sandpaper, and then polishing on 6, 3, and 1 µm diamond-lap-wheel was performed. Nano-mechanical measurements were done using nanoindenter machine with resolution less than 1 nN and displacement resolution of 0.04 nm. Berkovich diamond indenter tip was used for the nanoindentation tests. For each indentation, a set of nanoindentation tests at least on 6 different locations per specimen surface were performed to obtain more representative mean results. Indentation test load-displacement curves were analysed using Oliver-Pharr method, and one-way ANOVA or Kruskal-Wallis test, following Kolmogorov-Smirnov and Shapiro-Wilk, was used to compare the results. Nanohardness (Hnano) values were 0.52±0.
The Journal of Advanced Prosthodontics
The aim of this study is to compare the casts obtained by using conventional techniques and liqui... more The aim of this study is to compare the casts obtained by using conventional techniques and liquid crystal display (LCD) three-dimensional (3D) print techniques in the All-on-4 treatment concept of the edentulous mandibular jaw. MATERIALS AND METHODS. In this study, a completely edentulous mandibular acrylic cast (typodont) with bone-level implants placed with the Allon-4 technique served as a reference cast. In this typodont, impressions were taken with the conventional technique and dental stone casts were obtained. In addition, after scanning the acrylic cast in a dental laboratory scanner and obtaining the Standard Tessellation Language (STL) data, 3D printed casts were manufactured with a 3D printing device based on the design. The stone and 3D printed casts were scanned in the laboratory scanner and STL data were obtained, and then the interimplant distances were measured using Geomagic Control X v2020 (3D Systems, Rock Hill, SC, USA) analysis software (n = 60). The obtained data were statistically evaluated with one-way analysis of variance (ANOVA) and Tukey's pairwise comparison tests. RESULTS. As a result of the one-way ANOVA test, it was determined that the stone casts, 3D printed casts, and reference cast values in all distance intervals conformed to the normal distribution and these values had a significant difference among them in all distance intervals. In Tukey pairwise comparison test, significant differences were found between casts at all distance intervals. In all analyses, the level of significance was determined as .05. CONCLUSION. 3D printed casts obtained with a 3D LCD printing device can be an alternative to stone casts when implants are placed in edentulous jaws.
Journal of Meffert Implant Institute, Oct 7, 2018
Journal of Meffert Implant Institute, Dec 5, 2020
Journal of Meffert Implant Institute, Oct 1, 2017
Journal of Meffert Implant Institute, Dec 5, 2020
Journal of Materials Engineering and Performance, 2021
Removable dentures (RDs) are mostly used to replace missing teeth, increase patients’ oral functi... more Removable dentures (RDs) are mostly used to replace missing teeth, increase patients’ oral function, esthetic, and phonetics, and restore lost residual ridge, for the maintenance of oral health. The main reasons often preferred for RDs are a cleaning, cost-effective manner, and popular treatment option for edentulous or partially edentulous patients. Unfortunately, the fracture of RDs is a common complication which occurs frequently as a result of fatigue failure by strong masticatory forces and also accidental damage. This causes concerns for patients in terms of stress, cost, and embarrassment. Therefore, a variable number of approaches to prevent the incidence of fracture have been used including the strengthening of acrylic resin and reinforcing the base of dentures. To enhance the fracture resistance and dimensional stability, metal bases and frameworks have been frequently incorporated into the dentures. However, the design of these frameworks is challenging and so requires experience for minimizing potential inaccuracy. In the current study, considering the developments in additive manufacturing technology, metal bases and frameworks were produced in lattice according to nine different unit cell models, compared with the traditional method by destructive and non-destructive experiments. According to the current data, vertical struts in lattice structures are significant in terms of tensile strength. Thus, it is important to choose the unit cell to be used for metal bases and frameworks in RDs. In addition, pores did not have a significant effect on tension resistance, but micro-cracks had a significant effect on lattice structures. The RDs produced with body diagonals with nodes from lattice structures resulted in an average of 160% more resistance to stretching than the RDs produced by the traditional casting method, in a similar density.
Turkiye Klinikleri Journal of Dental Sciences, 2018
İmplant üstü restorasyonlar simante ve vidalı olarak tasarlanabilmektedir. Sonlu elemanlar analiz... more İmplant üstü restorasyonlar simante ve vidalı olarak tasarlanabilmektedir. Sonlu elemanlar analizi yöntemi (SEA) ile simante ve vidalı implant üstü restorasyonlarda periimplant bölgedeki kortikal ve spogiöz kemikte, implant ve abutmentlarda oluşan stres dağılımını incelemektir. G Ge er re eç ç v ve e Y Yö ön nt te em ml le er r: : Bilgisayar destekli tasarım yazılımı kullanılarak, tek üye seramik restorasyonlu iki çalışma modeli tasarlandı. Üç boyutlu kemik içerisine implant yerleştirildi, simante ve vidalı olmak üzere iki farklı abutment tasarımı yapıldı. İmplantın çevresinde en az 1 mm trabeküler kemik olacak şekilde ve çene kemiğinin etrafında kortikal kemik kalınlığı 2 mm olacak şekilde modellendi. Abutment yükselikleri simante tasarımda 4 mm ve vidalı tasarımda ise 1 mm olarak modellendi. İmplant ve abutmentlar vida aracılığıyla birbirine bağlandı. Abutmentlar üzerine mandibuler birinci büyük azı diş monolitik zirkonya kron tasarımı basit bir şekilde modellendi ve 300 N'luk oklüzal kuvvetin uygulanacağı distal üçgensel fossaya denk gelen bölgesi her iki kron tipinde de aynı bölgede olacak şekilde belirlendi. Tüm modeller ağ oluşturma ve stres analizi için SEA yazılımına aktarıldı. B Bu ul lg gu ul la ar r: : Maksimum asal gerilme değerlerinin vidalı sistemlerde büyük (34,7 MPa), minimum asal gerilme değerlerinin ise simante sistemlerde büyük olduğu görülmüştür (104,7 MPa). S So on nu uç ç: : SEA sınırları dâhilinde, vidalı sistemlerin abutment ve vida üzerinde oluşturduğu stres değerleri daha fazladır. A An na ah ht ta ar r K Ke el li im me el le er r: : Bilgisayar yardımlı tasarım; diş implantları, tek diş; dental stres analizi A AB BS ST TR RA AC CT T O Ob bj je ec ct ti iv ve e: : Implant supported restorations can be designed as cemented or screw retained. The purpose of this study was to evaluate the stress distribution of implant supported cemented and screw retained restorations using finite element methods. M Ma at te er ri ia al l a an nd d M Me et th ho od ds s: : Two working models with ceramic restoration were designed using a computer aided design software. Two different abutment designs were made as cemented and screw retained. The design was modelled to have at least 1 mm of trabecular bone around the implant and a cortical bone thickness of 2 mm around the jawbone. The abutment heights are modeled as 4 mm for the cemented and 1 mm for the screw retained. Implants and abutments were connected to each other with screw. The mandibular first molar crown designs on the abutments were modeled and the occlusal force was applied to the same region in both crown types corresponding to the distal triangular fossa. All models were transferred to FEM software for networking and stress analysis. R Re es su ul lt ts s: : The maximum principal stress values were found to be higher (34.7 MPa) in screw retained systems and the minimum principal stress values were higher in cemented systems (104.7 MPa). C Co on nc cl lu us si io on n: : Within the limitation of this study, screw retained design showed higher stresses concentration on the implant abutment and screw.
Clinical Oral Implants Research, 2018
©2016 Turkish League Against Rheumatism. All rights reserved. A 24-year-old male patient was admi... more ©2016 Turkish League Against Rheumatism. All rights reserved. A 24-year-old male patient was admitted to the Otorhinolaryngology Department with complaints of pain for three days in the bilateral preauricular region. The pain was constant, severe, and increased when he reclined, chewed or talked. There was no medical history of fever or trauma. Physical examination findings included mild edema, allodynia, and hyperalgesia in the bilateral preauricular area and bilateral masseter muscle. Panoramic radiograph showed limited interincisal mouth opening (12 mm) (Figure 1a). A written informed consent was obtained from the patient.
Clinical Oral Implants Research, Oct 1, 2018
Background : Nowadays, tilted implants are increasingly being discussed as an alternative treatme... more Background : Nowadays, tilted implants are increasingly being discussed as an alternative treatment in situations characterized by limited bone height and anatomic limitation. Using angulated orientation for implants allows the use of longer implants, a short cantilever length and larger inter-implant distance. When the regular straight implant is placed in angulation, one side is immersed in the bone. To overcome this inconvenience mostly bone is augmented or one side of the implant stay unsupported. Aim/Hypothesis : The newly designed angulated-implant would overcome this bone removal thus cause more support and also increase the surface area. The aim of this FEA study is to compare the stress levels at the bone implant interface of tilted-straight versus angulated-implant designs for the tilted configurations. Material and Methods : Three-dimensional models of two different [straight (4.3 × 9 mm) and angulated (4.3 × 11 mm)] implant designs were constructed for the same implant bed in a D2 bone model. The implants are modelled as single unit and the crowns are modeled as lower first molar. The single crown restorations were inserted on these implants via angulated abutments. All materials' Young modulus and Poisson ' s ratio were defined. To simulate chewing forces, oblique load of 300 N was applied to the distal occlusal surface (1.5 mm 2) of the crown in all three directions (x , y , and z). The stresses in the peri-implant tissues and the implant components were investigated by analyzing max-min principle and von Mises stresses using 3D-FEA software program. Results : According to the results, analysis predicted that in peri-implant tissues, the maximum stress was found around the neck region of the implant for all models. The finite element analysis performed with the 30° tilted-straight implant show partial, high stress peaks in the region of the implant shoulder region and its components, whereas angulated-implant show a very uniform and completely uncritical distribution of the von Mises stresses. The stress peaks usually experienced with this loading can be effectively prevented by the angulated-implant system. This in turn protects the surrounding bone in the angularly placed implants in necessary regions. The angulated-implant design showed a lower absolute value of compressive stress compared with the tilted-straight implant, indicating a possible biomechanical advantage in reducing stresses at the bone-implant interface. Conclusions and Clinical Implications : Within the limitations of this FEA study, from a biomechanical point of view, favorable peri-implant stress levels could be induced by angled-implants under oblique loading. The new design can demonstrate superior performance in anatomical design and biomechanical advantage with reduced prosthetic and technical complications. Further clinical and biomechanical studies are necessary to confirm this encouraging results.
Clinical Oral Implants Research, Oct 1, 2018
Background : Nowadays, tilted implants are increasingly being discussed as an alternative treatme... more Background : Nowadays, tilted implants are increasingly being discussed as an alternative treatment in situations characterized by limited bone height and anatomic limitation. Using angulated orientation for implants allows the use of longer implants, a short cantilever length and larger inter-implant distance. When the regular straight implant is placed in angulation, one side is immersed in the bone. To overcome this inconvenience mostly bone is augmented or one side of the implant stay unsupported. Aim/Hypothesis : The newly designed angulated-implant would overcome this bone removal thus cause more support and also increase the surface area. The aim of this FEA study is to compare the stress levels at the bone implant interface of tilted-straight versus angulated-implant designs for the tilted configurations. Material and Methods : Three-dimensional models of two different [straight (4.3 × 9 mm) and angulated (4.3 × 11 mm)] implant designs were constructed for the same implant bed in a D2 bone model. The implants are modelled as single unit and the crowns are modeled as lower first molar. The single crown restorations were inserted on these implants via angulated abutments. All materials' Young modulus and Poisson ' s ratio were defined. To simulate chewing forces, oblique load of 300 N was applied to the distal occlusal surface (1.5 mm 2) of the crown in all three directions (x , y , and z). The stresses in the peri-implant tissues and the implant components were investigated by analyzing max-min principle and von Mises stresses using 3D-FEA software program. Results : According to the results, analysis predicted that in peri-implant tissues, the maximum stress was found around the neck region of the implant for all models. The finite element analysis performed with the 30° tilted-straight implant show partial, high stress peaks in the region of the implant shoulder region and its components, whereas angulated-implant show a very uniform and completely uncritical distribution of the von Mises stresses. The stress peaks usually experienced with this loading can be effectively prevented by the angulated-implant system. This in turn protects the surrounding bone in the angularly placed implants in necessary regions. The angulated-implant design showed a lower absolute value of compressive stress compared with the tilted-straight implant, indicating a possible biomechanical advantage in reducing stresses at the bone-implant interface. Conclusions and Clinical Implications : Within the limitations of this FEA study, from a biomechanical point of view, favorable peri-implant stress levels could be induced by angled-implants under oblique loading. The new design can demonstrate superior performance in anatomical design and biomechanical advantage with reduced prosthetic and technical complications. Further clinical and biomechanical studies are necessary to confirm this encouraging results.
Acta Physica Polonica A, Sep 1, 2017
The main goal of nanoindentation tests is to obtain elastic modulus and hardness of the specimen ... more The main goal of nanoindentation tests is to obtain elastic modulus and hardness of the specimen material from load-displacement measurements. With this study, it was aimed to establish a quantitative relationship between the nanomechanical properties of commonly used dental cements in comparison to a newly developed crown cement and to predict its performance potential. Nanomechanical properties of polycarboxylate cement (PCC), glass-ionomer cement (GIC), dual-cure self-adhesive cement (SAC) and a newly developed glass-carbomer cement (GCC) were investigated by nanoindentation tests. All samples were fabricated according to their respective manufacturer's instructions. Available damage on the surface due to manipulation was removed by grinding with 1200, 2400 and 4000 grit sandpaper, and then polishing on 6, 3, and 1 µm diamond-lap-wheel was performed. Nano-mechanical measurements were done using nanoindenter machine with resolution less than 1 nN and displacement resolution of 0.04 nm. Berkovich diamond indenter tip was used for the nanoindentation tests. For each indentation, a set of nanoindentation tests at least on 6 different locations per specimen surface were performed to obtain more representative mean results. Indentation test load-displacement curves were analysed using Oliver-Pharr method, and one-way ANOVA or Kruskal-Wallis test, following Kolmogorov-Smirnov and Shapiro-Wilk, was used to compare the results. Nanohardness (Hnano) values were 0.52±0.
The Journal of Advanced Prosthodontics
The aim of this study is to compare the casts obtained by using conventional techniques and liqui... more The aim of this study is to compare the casts obtained by using conventional techniques and liquid crystal display (LCD) three-dimensional (3D) print techniques in the All-on-4 treatment concept of the edentulous mandibular jaw. MATERIALS AND METHODS. In this study, a completely edentulous mandibular acrylic cast (typodont) with bone-level implants placed with the Allon-4 technique served as a reference cast. In this typodont, impressions were taken with the conventional technique and dental stone casts were obtained. In addition, after scanning the acrylic cast in a dental laboratory scanner and obtaining the Standard Tessellation Language (STL) data, 3D printed casts were manufactured with a 3D printing device based on the design. The stone and 3D printed casts were scanned in the laboratory scanner and STL data were obtained, and then the interimplant distances were measured using Geomagic Control X v2020 (3D Systems, Rock Hill, SC, USA) analysis software (n = 60). The obtained data were statistically evaluated with one-way analysis of variance (ANOVA) and Tukey's pairwise comparison tests. RESULTS. As a result of the one-way ANOVA test, it was determined that the stone casts, 3D printed casts, and reference cast values in all distance intervals conformed to the normal distribution and these values had a significant difference among them in all distance intervals. In Tukey pairwise comparison test, significant differences were found between casts at all distance intervals. In all analyses, the level of significance was determined as .05. CONCLUSION. 3D printed casts obtained with a 3D LCD printing device can be an alternative to stone casts when implants are placed in edentulous jaws.
Journal of Meffert Implant Institute, Oct 7, 2018
Journal of Meffert Implant Institute, Dec 5, 2020
Journal of Meffert Implant Institute, Oct 1, 2017
Journal of Meffert Implant Institute, Dec 5, 2020
Journal of Materials Engineering and Performance, 2021
Removable dentures (RDs) are mostly used to replace missing teeth, increase patients’ oral functi... more Removable dentures (RDs) are mostly used to replace missing teeth, increase patients’ oral function, esthetic, and phonetics, and restore lost residual ridge, for the maintenance of oral health. The main reasons often preferred for RDs are a cleaning, cost-effective manner, and popular treatment option for edentulous or partially edentulous patients. Unfortunately, the fracture of RDs is a common complication which occurs frequently as a result of fatigue failure by strong masticatory forces and also accidental damage. This causes concerns for patients in terms of stress, cost, and embarrassment. Therefore, a variable number of approaches to prevent the incidence of fracture have been used including the strengthening of acrylic resin and reinforcing the base of dentures. To enhance the fracture resistance and dimensional stability, metal bases and frameworks have been frequently incorporated into the dentures. However, the design of these frameworks is challenging and so requires experience for minimizing potential inaccuracy. In the current study, considering the developments in additive manufacturing technology, metal bases and frameworks were produced in lattice according to nine different unit cell models, compared with the traditional method by destructive and non-destructive experiments. According to the current data, vertical struts in lattice structures are significant in terms of tensile strength. Thus, it is important to choose the unit cell to be used for metal bases and frameworks in RDs. In addition, pores did not have a significant effect on tension resistance, but micro-cracks had a significant effect on lattice structures. The RDs produced with body diagonals with nodes from lattice structures resulted in an average of 160% more resistance to stretching than the RDs produced by the traditional casting method, in a similar density.
Turkiye Klinikleri Journal of Dental Sciences, 2018
İmplant üstü restorasyonlar simante ve vidalı olarak tasarlanabilmektedir. Sonlu elemanlar analiz... more İmplant üstü restorasyonlar simante ve vidalı olarak tasarlanabilmektedir. Sonlu elemanlar analizi yöntemi (SEA) ile simante ve vidalı implant üstü restorasyonlarda periimplant bölgedeki kortikal ve spogiöz kemikte, implant ve abutmentlarda oluşan stres dağılımını incelemektir. G Ge er re eç ç v ve e Y Yö ön nt te em ml le er r: : Bilgisayar destekli tasarım yazılımı kullanılarak, tek üye seramik restorasyonlu iki çalışma modeli tasarlandı. Üç boyutlu kemik içerisine implant yerleştirildi, simante ve vidalı olmak üzere iki farklı abutment tasarımı yapıldı. İmplantın çevresinde en az 1 mm trabeküler kemik olacak şekilde ve çene kemiğinin etrafında kortikal kemik kalınlığı 2 mm olacak şekilde modellendi. Abutment yükselikleri simante tasarımda 4 mm ve vidalı tasarımda ise 1 mm olarak modellendi. İmplant ve abutmentlar vida aracılığıyla birbirine bağlandı. Abutmentlar üzerine mandibuler birinci büyük azı diş monolitik zirkonya kron tasarımı basit bir şekilde modellendi ve 300 N'luk oklüzal kuvvetin uygulanacağı distal üçgensel fossaya denk gelen bölgesi her iki kron tipinde de aynı bölgede olacak şekilde belirlendi. Tüm modeller ağ oluşturma ve stres analizi için SEA yazılımına aktarıldı. B Bu ul lg gu ul la ar r: : Maksimum asal gerilme değerlerinin vidalı sistemlerde büyük (34,7 MPa), minimum asal gerilme değerlerinin ise simante sistemlerde büyük olduğu görülmüştür (104,7 MPa). S So on nu uç ç: : SEA sınırları dâhilinde, vidalı sistemlerin abutment ve vida üzerinde oluşturduğu stres değerleri daha fazladır. A An na ah ht ta ar r K Ke el li im me el le er r: : Bilgisayar yardımlı tasarım; diş implantları, tek diş; dental stres analizi A AB BS ST TR RA AC CT T O Ob bj je ec ct ti iv ve e: : Implant supported restorations can be designed as cemented or screw retained. The purpose of this study was to evaluate the stress distribution of implant supported cemented and screw retained restorations using finite element methods. M Ma at te er ri ia al l a an nd d M Me et th ho od ds s: : Two working models with ceramic restoration were designed using a computer aided design software. Two different abutment designs were made as cemented and screw retained. The design was modelled to have at least 1 mm of trabecular bone around the implant and a cortical bone thickness of 2 mm around the jawbone. The abutment heights are modeled as 4 mm for the cemented and 1 mm for the screw retained. Implants and abutments were connected to each other with screw. The mandibular first molar crown designs on the abutments were modeled and the occlusal force was applied to the same region in both crown types corresponding to the distal triangular fossa. All models were transferred to FEM software for networking and stress analysis. R Re es su ul lt ts s: : The maximum principal stress values were found to be higher (34.7 MPa) in screw retained systems and the minimum principal stress values were higher in cemented systems (104.7 MPa). C Co on nc cl lu us si io on n: : Within the limitation of this study, screw retained design showed higher stresses concentration on the implant abutment and screw.
Clinical Oral Implants Research, 2018
©2016 Turkish League Against Rheumatism. All rights reserved. A 24-year-old male patient was admi... more ©2016 Turkish League Against Rheumatism. All rights reserved. A 24-year-old male patient was admitted to the Otorhinolaryngology Department with complaints of pain for three days in the bilateral preauricular region. The pain was constant, severe, and increased when he reclined, chewed or talked. There was no medical history of fever or trauma. Physical examination findings included mild edema, allodynia, and hyperalgesia in the bilateral preauricular area and bilateral masseter muscle. Panoramic radiograph showed limited interincisal mouth opening (12 mm) (Figure 1a). A written informed consent was obtained from the patient.
Clinical Oral Implants Research, Oct 1, 2018
Background : Nowadays, tilted implants are increasingly being discussed as an alternative treatme... more Background : Nowadays, tilted implants are increasingly being discussed as an alternative treatment in situations characterized by limited bone height and anatomic limitation. Using angulated orientation for implants allows the use of longer implants, a short cantilever length and larger inter-implant distance. When the regular straight implant is placed in angulation, one side is immersed in the bone. To overcome this inconvenience mostly bone is augmented or one side of the implant stay unsupported. Aim/Hypothesis : The newly designed angulated-implant would overcome this bone removal thus cause more support and also increase the surface area. The aim of this FEA study is to compare the stress levels at the bone implant interface of tilted-straight versus angulated-implant designs for the tilted configurations. Material and Methods : Three-dimensional models of two different [straight (4.3 × 9 mm) and angulated (4.3 × 11 mm)] implant designs were constructed for the same implant bed in a D2 bone model. The implants are modelled as single unit and the crowns are modeled as lower first molar. The single crown restorations were inserted on these implants via angulated abutments. All materials' Young modulus and Poisson ' s ratio were defined. To simulate chewing forces, oblique load of 300 N was applied to the distal occlusal surface (1.5 mm 2) of the crown in all three directions (x , y , and z). The stresses in the peri-implant tissues and the implant components were investigated by analyzing max-min principle and von Mises stresses using 3D-FEA software program. Results : According to the results, analysis predicted that in peri-implant tissues, the maximum stress was found around the neck region of the implant for all models. The finite element analysis performed with the 30° tilted-straight implant show partial, high stress peaks in the region of the implant shoulder region and its components, whereas angulated-implant show a very uniform and completely uncritical distribution of the von Mises stresses. The stress peaks usually experienced with this loading can be effectively prevented by the angulated-implant system. This in turn protects the surrounding bone in the angularly placed implants in necessary regions. The angulated-implant design showed a lower absolute value of compressive stress compared with the tilted-straight implant, indicating a possible biomechanical advantage in reducing stresses at the bone-implant interface. Conclusions and Clinical Implications : Within the limitations of this FEA study, from a biomechanical point of view, favorable peri-implant stress levels could be induced by angled-implants under oblique loading. The new design can demonstrate superior performance in anatomical design and biomechanical advantage with reduced prosthetic and technical complications. Further clinical and biomechanical studies are necessary to confirm this encouraging results.
Clinical Oral Implants Research, Oct 1, 2018
Background : Nowadays, tilted implants are increasingly being discussed as an alternative treatme... more Background : Nowadays, tilted implants are increasingly being discussed as an alternative treatment in situations characterized by limited bone height and anatomic limitation. Using angulated orientation for implants allows the use of longer implants, a short cantilever length and larger inter-implant distance. When the regular straight implant is placed in angulation, one side is immersed in the bone. To overcome this inconvenience mostly bone is augmented or one side of the implant stay unsupported. Aim/Hypothesis : The newly designed angulated-implant would overcome this bone removal thus cause more support and also increase the surface area. The aim of this FEA study is to compare the stress levels at the bone implant interface of tilted-straight versus angulated-implant designs for the tilted configurations. Material and Methods : Three-dimensional models of two different [straight (4.3 × 9 mm) and angulated (4.3 × 11 mm)] implant designs were constructed for the same implant bed in a D2 bone model. The implants are modelled as single unit and the crowns are modeled as lower first molar. The single crown restorations were inserted on these implants via angulated abutments. All materials' Young modulus and Poisson ' s ratio were defined. To simulate chewing forces, oblique load of 300 N was applied to the distal occlusal surface (1.5 mm 2) of the crown in all three directions (x , y , and z). The stresses in the peri-implant tissues and the implant components were investigated by analyzing max-min principle and von Mises stresses using 3D-FEA software program. Results : According to the results, analysis predicted that in peri-implant tissues, the maximum stress was found around the neck region of the implant for all models. The finite element analysis performed with the 30° tilted-straight implant show partial, high stress peaks in the region of the implant shoulder region and its components, whereas angulated-implant show a very uniform and completely uncritical distribution of the von Mises stresses. The stress peaks usually experienced with this loading can be effectively prevented by the angulated-implant system. This in turn protects the surrounding bone in the angularly placed implants in necessary regions. The angulated-implant design showed a lower absolute value of compressive stress compared with the tilted-straight implant, indicating a possible biomechanical advantage in reducing stresses at the bone-implant interface. Conclusions and Clinical Implications : Within the limitations of this FEA study, from a biomechanical point of view, favorable peri-implant stress levels could be induced by angled-implants under oblique loading. The new design can demonstrate superior performance in anatomical design and biomechanical advantage with reduced prosthetic and technical complications. Further clinical and biomechanical studies are necessary to confirm this encouraging results.