_Applied sciences_  
_Article_  
**Finite Element Analysis (FEA) of the Stress and Strain**  
**Distribution in Cone-Morse Implant-Abtment Connection**  
**Implants Placed Equicrestally and Subcrestally**  
**[PERSON] \({}^{1,2,\ast,\ast}\)\({}^{\text{(\copyright)}}\), [PERSON] \({}^{3,\ast}\), [PERSON] \({}^{1,2}\)\({}^{\text{(\copyright)}}\), [PERSON] \({}^{4}\), [PERSON] \({}^{5}\), [PERSON] \({}^{6}\), [PERSON] \({}^{1}\), [PERSON] \({}^{7,8}\) and [PERSON] \({}^{3}\)\({}^{\text{(\copyright)}}\)**  
\({}^{1}\) Department of Medical, Oral and Biotechnological Sciences, \"[PERSON]\" University of Chieti-Pescara,  
66100 Chieti, Italy; [EMAIL_ADDRESS] (T.R. ); [EMAIL_ADDRESS] (A.S.)  
\({}^{2}\) Center for Advanced Studies and Technologies (CAST), \"G. d'Annunzio\" University of Chieti-Pescara,  
66100 Chieti, Italy  
\({}^{3}\) Department of Mechanics, Mathematics and Management, Politecnico di Bari University, 70125 Bari, Italy; [EMAIL_ADDRESS] (M.C. ); [EMAIL_ADDRESS] (B.T.) \({}^{4}\) Department of Oral Implantatology, Associacio Paulista dos Cirurgioles Dentists--APCD,  
Sao Bernardo de Campo 02011-000, Brazil; [EMAIL_ADDRESS]  
\({}^{5}\) Department of Peridontology and Oral Implantatology, Unisul University, Florianopolis 88101-001, Brazil; brunf@[EMAIL_ADDRESS]  
\({}^{6}\) Department of Medical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy; margherita.tumedei@unimiral. \({}^{7}\) School of Dentistry, Saint Camillus International University of Health and Medical Sciences,  
00131 Rome, Italy; [EMAIL_ADDRESS]  
\({}^{8}\) Facultad de Medicina, UCAM Universidad Catolica San Antonio de Murcia, 30107 Murcia, Spain  
\({}^{\ast}\) Correspondence: [EMAIL_ADDRESS]  
\({}^{\ast}\) These authors contributed equally to this work. **Citation:** [PERSON], [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON], [PERSON] Finite Element Analysis (FEA) of the Stress and Strain Distribution in  
Cone-Morse Implant-Abtment Connection Implants Placed Equicrestally and Subcrestally. _Appl. Sci._**2023**, 13, 8147. [[https://doi.org/10.3390/app13148147](https://doi.org/10.3390/app13148147)]([https://doi.org/10.3390/app13148147](https://doi.org/10.3390/app13148147))  
\({}^{1}\) Department of Medical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy; [EMAIL_ADDRESS]  
\({}^{2}\) Department of Medical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy; [EMAIL_ADDRESS]  
\({}^{3}\) School of Dentistry, Saint Camillus International University of Health and Medical Sciences,  
00131 Rome, Italy; [EMAIL_ADDRESS]  
\({}^{8}\) Facultad de Medicina, UCAM Universidad Catolica San Antonio de Murcia, 30107 Murcia, Spain  
\({}^{\ast}\) Correspondence: [EMAIL_ADDRESS]  
\({}^{\ast}\) These authors contributed equally to this work. **Abstract:** Peri-implant bone resorption has been reported around some implants after loading, which could create problems for the peri-implant soft and hard tissues' long-term stability. The reasons for this are still not known. However, relevant importance could be given to this due to the presence of a bacterial contamination at the micro-gap level between implant and abtment. In this regard, external and internal implant-abtment assemblies have been shown to be much more permeable to bacterial colonization than Cone-Morse or conical connections. The placement of a subcrestal implant could have aesthetic advantages, therefore allowing a better prosthetic emergence profile. In literature, controversial experimental and clinical results have been reported on bone resorption around implants placed equicrestally and subcrestally. Interestingly, Finite Element Analysis (FEA) studies revealed to be extremely useful for assessing the peri-implant bone strain and stress.