1
|
Zhang MY, Song W, Wang JB, Lv RQ, Zhao FH, Yang DW. Surgical vs. conservative treatment for hip osteoporotic fracture in maintenance hemodialysis patients: a retrospective analysis. Front Surg 2024; 11:1471101. [PMID: 39713805 PMCID: PMC11659257 DOI: 10.3389/fsurg.2024.1471101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2024] [Accepted: 11/22/2024] [Indexed: 12/24/2024] Open
Abstract
Background HSip Osteoporotic fractures are common complications with high mortality in patients undergoing maintenance hemodialysis (MHD). It remains unclear whether surgical or conservative should be adopted for hip fractures in MHD patients. Methods A retrospective analysis was conducted in Tianjin Hospital of Tianjin University from August 2019 to August 2023. A total of 43 MHD patients with hip fracture were included, with 30 cases in the surgical group and 13 cases in the conservative group. The differences in cumulative survival rates, time to first ambulation, Harris score, Barthel index, and incidence of complications were compared. Results The surgical group had remarkable lower mortality rates as compared with the conservative group at 1, 2, 3, 6, 12, 24 months (13.33 VS. 38.46%, 26.67 VS. 53.85%, 26.67 VS. 53.85%, 26.67 VS. 61.54%, 26.67 VS. 61.54%, and 26.67 VS. 69.23%). In the surgical treatment group, the first ambulation time was reduced to 28 (26) days, which was superior to the conservative group (134.17 ± 43.18 days, P < 0.001). The Harris score at 1 month (61.50 ± 4.10) and the Barthel index at 3 months (95, 11.25) were also significantly higher (P < 0.001). Furthermore, the surgical group had a significantly lower overall incidence of complications (60.00 vs. 92.31%, P = 0.034). The risk of death and complications of surgical treatment was only 23.0 and 32.4% of conservative treatment in MHD patients with hip fracture. Conclusion Surgical treatment is effective and safe and should be the first choice for hip fracture in MHD patients.
Collapse
Affiliation(s)
- Man-Yu Zhang
- Department of Nephrology, Tianjin Hospital of Tianjin University, Tianjin, China
| | - Wei Song
- Department of Nephrology, Tianjin Hospital of Tianjin University, Tianjin, China
| | - Jing-Bo Wang
- Department of Hip Traumatology, Tianjin Hospital of Tianjin University, Tianjin, China
| | - Rui-Qian Lv
- Department of Nephrology, Tianjin Hospital of Tianjin University, Tianjin, China
| | - Fu-Hao Zhao
- Department of Nephrology, Tianjin Hospital of Tianjin University, Tianjin, China
| | - Ding-Wei Yang
- Department of Nephrology, Tianjin Hospital of Tianjin University, Tianjin, China
| |
Collapse
|
2
|
Xu X, Fan J, Zhou F, Lv Y, Tian Y, Ji H, Zhang Z, Guo Y, Yang Z, Hou G. Comparison of femoral neck system to multiple cancellous screws and dynamic hip screws in the treatment of femoral neck fractures. Injury 2022; 54 Suppl 2:S28-S35. [PMID: 35367076 DOI: 10.1016/j.injury.2022.03.041] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 03/07/2022] [Accepted: 03/22/2022] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To compare the short-term outcomes of the femoral neck system (FNS) with multiple cancellous screws (MCS) and dynamic hip screws (DHS) in the treatment of femoral neck fractures. METHODS A retrospective analysis was performed on 157 patients with fresh femoral neck fractures treated with FNS (from September 2019 to October 2020), MCS, and DHS (from January 2018 to October 2020). According to internal fixation methods, all patients were divided into the FNS group (54 cases), MCS group (51 cases), and DHS group (52 cases). Demographic data were also collected, recorded, and compared, including the follow-up time, days of hospitalization, operation time, blood loss, intraoperative fluoroscopy times (IFT), weight-bearing time (WBT), length of femoral neck shortening (LFNS), Harris hip score, and complications (such as internal fixation failure, bone nonunion, and avascular necrosis of the femoral head) between the three groups. RESULTS Overall, 157 patients with a mean age of 61.8 (range, 18-89) years were analyzed. In the FNS group, IFT (median 10.5) was significantly lower than that in the MCS group (median 21) and DHS group (median 20.5) (P<0.05), and WBT was significantly earlier than that of the MCS group (P<0.05). In the FNS group, the median hospitalization time, operation time, and blood loss were 2 (2, 4) days, 45 (40-59) min, and 30 (20, 50) ml, respectively. They were all significantly less than 3.5 (3, 6) days, 72 (55-88.75) min, and 50 (30, 50) ml in the DHS group, respectively (P < 0.05). There was no statistical difference in LFNS, quality of reduction, internal fixation failure rate, and Harris hip score at the latest follow-up (P>0.05). No surgical complications such as incision infection, deep infection, pulmonary embolism, or femoral head necrosis were found in any of the three groups. CONCLUSION FNS, MCS, and DHS are all effective for femoral neck fractures. However, a lower IFT of FNS shortens the operation time. Compared to MCS, FNS has the advantages of being a simple operation, with early WBT; compared to DHS, a minimally invasive operation is the main advantage of FNS.
Collapse
Affiliation(s)
- Xiangyu Xu
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Jixing Fan
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Fang Zhou
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China.
| | - Yang Lv
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Yun Tian
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Hongquan Ji
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Zhishan Zhang
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Yan Guo
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Zhongwei Yang
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Guojin Hou
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| |
Collapse
|
3
|
Xu X, Lv Y, Cui Z, Fan J, Zhou F, Tian Y, Ji H, Zhang Z, Guo Y, Yang Z, Hou G. Non-sliding Fixation Shows Improved Clinical Outcomes for Displaced Femoral Neck Fractures as Compared to Sliding Fixation. Front Surg 2022; 9:826159. [PMID: 35402501 PMCID: PMC8987303 DOI: 10.3389/fsurg.2022.826159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 02/21/2022] [Indexed: 11/13/2022] Open
Abstract
Objective To compare the clinical outcomes between use of sliding fixation (three cannulated screws, TCS) and non-sliding fixation (four cannulated screws, FCS) in the treatment of femoral neck fractures. Methods We retrospectively analyzed 102 patients with fresh femoral neck fractures treated with TCS (60 cases) and FCS (42 cases) between January, 2018 and December, 2019. The demographic data, follow-up time, hospitalization time, operation time, blood loss, length of femoral neck shortening (LFNS), soft tissue irritation of the thigh (STIT), Harris hip score, and complications (such as internal fixation failure, non-union, and avascular necrosis of the femoral head) were also collected, recorded, and compared between the two groups. Results A total of 102 patients with an average age of 60.9 (range, 18–86) years were analyzed. The median follow-up time was 25 (22 to 32) months. The LFNS in the FCS group (median 1.2 mm) was significantly lower than that in the TCS group (median 2.8 mm) (P < 0.05). In the Garden classification, the number of displaced fractures in the TCS group was significantly lower than that in the FCS group (P < 0.05). The median hospitalization time, operation time, blood loss, reduction quality, internal fixation failure rate (IFFR), STIT, and Harris hip score were not statistically different between the two groups (P > 0.05). However, in the subgroup analysis of displaced fractures, the LFNS (median 1.2 mm), STIT (2/22, 13.6%), and Harris hip score (median 91.5) of the FCS group at the last follow-up were significantly better than the LFNS (median 5.7 mm), STIT (7/16, 43.8%), and Harris hip score (median 89) of the TCS group (P < 0.05). No complications such as incision infection, deep infection, pulmonary embolism, or femoral head necrosis were found in either group. Conclusion TCS and FCS are effective for treating femoral neck fractures. For non-displaced fractures, there was no significant difference in the clinical outcomes between the two groups. However, for displaced fractures, the LFNS of the FCS is significantly lower than that of the TCS, which may reduce the occurrence of STIT and improve the Harris hip score.
Collapse
Affiliation(s)
- Xiangyu Xu
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Yang Lv
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Zengzhen Cui
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Jixing Fan
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Fang Zhou
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
- *Correspondence: Fang Zhou
| | - Yun Tian
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Hongquan Ji
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Zhishan Zhang
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Yan Guo
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Zhongwei Yang
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Guojin Hou
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| |
Collapse
|
4
|
Li X, Luo J. Hemiarthroplasty compared to total hip arthroplasty for the treatment of femoral neck fractures: a systematic review and meta-analysis. J Orthop Surg Res 2021; 16:172. [PMID: 33658055 PMCID: PMC7931515 DOI: 10.1186/s13018-020-02186-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 12/25/2020] [Indexed: 01/11/2023] Open
Abstract
Background Hip replacement is divided into total hip arthroplasty (THA) and hemiarthroplasty (HA); it is still controversial whether to choose THA or HA for femoral neck fractures (FNF). The goal of this study was to review relevant studies in order to determine the HA compared to THA for the treatment of FNF. Patients and methods Using appropriate keywords, we identified relevant studies using PubMed, Cochrane, and Embase. Key pertinent sources in the literature were also reviewed, and all articles published through August 2019 were considered for inclusion. For each study, we assessed odds ratios (ORs), mean difference (MD), and 95% confidence interval (95% CI) to assess and synthesize outcomes. Results We included 19 studies with a total of 413,140 patients in the HA group and 44973 in the THA group. The blood loss, surgery time, and dislocation were all significantly decreased in the HA group than the THA group. The length of hospital, pneumonia, and renal failure were significant increased in the HA group than THA group. There has no significant difference of complication, mortality, reoperation, infection, pulmonary embolism, and myocardial infarct between the two groups. Conclusion HA has favor in decrease blood loss and surgery time. THA has favor in decrease the length of hospital, the incidence of pneumonia and renal failure. For the selection of surgical methods for femoral neck fracture in the elderly, we should consider several aspects, such as the age of the patient, whether there is osteoporosis, the type of femoral neck fracture, the preoperative reduction situation, and the needs of the patient and his family for the postoperative situation. Supplementary Information The online version contains supplementary material available at 10.1186/s13018-020-02186-4.
Collapse
Affiliation(s)
- Xinbo Li
- Trauma Orthopedics Ward 1, Ningbo No. 6 Hospital, No. 1059, Zhongshan East Road, Dongliu Street, Yinzhou District, Ningbo City, 315040, Zhejiang Province, China
| | - Jianning Luo
- Trauma Orthopedics Ward 2, Ningbo No. 6 Hospital, No. 1059, Zhongshan East Road, Dongliu Street, Yinzhou District, Ningbo City, 315040, Zhejiang Province, China.
| |
Collapse
|
5
|
Ju FX, Hou RX, Xiong J, Shi HF, Chen YX, Wang JF. Outcomes of Femoral Neck Fractures Treated with Cannulated Internal Fixation in Elderly Patients: A Long-Term Follow-Up Study. Orthop Surg 2020; 12:809-818. [PMID: 32462816 PMCID: PMC7307235 DOI: 10.1111/os.12683] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 03/09/2020] [Accepted: 03/26/2020] [Indexed: 12/31/2022] Open
Abstract
Objectives To evaluate the long‐term efficacy of cannulated internal fixation in patients who sustain femoral neck fracture (FNF) and risk factors influencing the outcomes. Methods This retrospective study analyzed data from 73 elderly patients aged ≥60 years old, hospitalized for FNF and treated with cannulated internal fixation between August 2008 and July 2016. The inclusion criteria were: (i) patients aged ≥60 years; (ii) patients with recent femoral neck fracture, with times of injury ranging from 12–72 h; and (iii) patients who underwent Garden II–IV closed reduction and internal fixation. Patients were classified based on the Garden fracture type and Pauwels angle. Clinical data and radiographs before and after the surgery were collected. Subsequently, surgery was performed with the patient in supine position, under general or lumbar epidural anesthesia. Closed reduction was performed until satisfactory fracture reduction quality was achieved. The weight of all included patients were <75 kg, and thus, minimal internal fixation was performed. The ischemic necrosis of the femoral head was diagnosed by considering the symptoms, signs, and radiological findings. Harris hip scores were used to evaluate postoperative recovery of hip function. Furthermore, relationships between Garden fracture type and necrosis rate of the femoral head, Pauwels angle and necrosis rate of the femoral head, Garden fracture type and Harris hip score, and age and Harris hip score were analyzed. Results The mean duration of surgery was 1 ± 0.17 h and blood loss for all the patients was approximately 15 mL. The included patients were followed up for 13–128 months, with an average follow‐up of 61 months. Among the included 73 patients, 65 (89.0%) exhibited satisfactory union, seven (9.6%) had femoral head necrosis, and one (1.4%) had nonunion. For seven patients with femoral head necrosis, there were two, two, and three patients classified as Garden IV, Garden III, and Garden II, respectively, and two and five patients classified as Pauwels II and Pauwels III, respectively. Among the seven cases, four underwent hip replacement. Garden fracture type was not significantly associated with femoral head necrosis (χ2 = 0.44, P > 0.05) or Harris score (χ2 = 1.43, P > 0.05). Patients with Pauwels I (0%) and II (4.3%) fractures exhibited a significantly lower necrosis rate than those with Pauwels III fractures (41.7%) (P < 0.05). Conclusions Cannulated internal fixation was more suitable for older Chinese patients with Pauwels I/II fractures than those with Pauwels III fractures.
Collapse
Affiliation(s)
- Fa-Xin Ju
- Ruihua Affiliated Hospital of Soochow University, Suzhou, China.,Orthopedics Department, Baoying County People's Hospital of Jiangsu Province, Yangzhou, China
| | - Rui-Xing Hou
- Ruihua Affiliated Hospital of Soochow University, Suzhou, China
| | - Jin Xiong
- Orthopedics Department, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Hong-Fei Shi
- Orthopedics Department, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Yi-Xin Chen
- Orthopedics Department, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Jun-Fei Wang
- Orthopedics Department, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| |
Collapse
|
6
|
Li G, Jin D, Shao X, Liu Z, Duan J, Akileh R, Cao S, Liu T. Effect of cannulated screws with deep circumflex iliac artery-bone grafting in the treatment of femoral neck fracture in young adults. Injury 2018; 49:1587-1593. [PMID: 29929779 DOI: 10.1016/j.injury.2018.06.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 06/11/2018] [Indexed: 02/02/2023]
Abstract
OBJECTIVES Surgical treatment of femoral neck fracture in young adults is clinically challenging due to the high incidence of avascular necrosis of femoral head and fracture nonunion. The objective of this study is to evaluate the effectiveness of cannulated screws with deep circumflex iliac artery bone grafting (DCIABG) by comparing to the routinely used method in the treatment of femoral neck fracture in young adults. METHODS From March 2006 to December 2012, a total of 185 patients with femoral neck fracture were admitted to the hospital for internal fixation surgery, 103 patients (61 males and 42 females, mean age of 39.1 years) were treated with three cannulated screws with DCIABG (group A), and 82 patients (49 males and 33 females, mean age of 35.5 years) were treated with three cannulated screws without DCIABG (group B). RESULTS All patients were followed up for at least 24 months after the surgery. The patients in group A had a significantly higher Harris Hip Score (p < 0.001), shorter fracture healing time (p < 0.001), lower occurrence rate of avascular necrosis of femoral head (p = 0.008) and fracture nonunion (p = 0.012) compared to the patients in group B. However, the operation time and intraoperative blood loss were significantly lower in patients in group B than those in group A (p < 0.001). CONCLUSIONS Cannulated screws with DCIABG significantly reduced femoral head osteonecrosis and fracture nonunion. Therefore, it is a feasible and effective method in the treatment of young adult patients with femoral neck fracture.
Collapse
Affiliation(s)
- Guanghui Li
- Department of Orthopedic Surgery, The Third Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong, 510630, China; Department of Orthopedic Surgery, The First Traditional Chinese Medical Hospital of Hunan Changde, Changde, Hunan, 415000, China
| | - Dadi Jin
- Department of Orthopedic Surgery, The Third Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong, 510630, China.
| | - Xianfang Shao
- Department of Orthopedic Surgery, The First Traditional Chinese Medical Hospital of Hunan Changde, Changde, Hunan, 415000, China
| | - Zhijun Liu
- Department of Orthopedic Surgery, The First Traditional Chinese Medical Hospital of Hunan Changde, Changde, Hunan, 415000, China
| | - Jianhui Duan
- Department of Orthopedic Surgery, The First Traditional Chinese Medical Hospital of Hunan Changde, Changde, Hunan, 415000, China
| | - Raji Akileh
- Department of Biomedical Sciences, West Virginia School of Osteopathic Medicine, Lewisburg, WV, 24901, United States
| | - Shousong Cao
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Tuoen Liu
- Department of Biomedical Sciences, West Virginia School of Osteopathic Medicine, Lewisburg, WV, 24901, United States.
| |
Collapse
|
7
|
Letter to the editor: Increased complication rates after hip and knee arthroplasty in patients with cirrhosis of the liver. Clin Orthop Relat Res 2015; 473:1532-3. [PMID: 25604878 PMCID: PMC4353514 DOI: 10.1007/s11999-015-4143-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 01/08/2015] [Indexed: 01/31/2023]
|
8
|
Biomechanical rationale for implant choices in femoral neck fracture fixation in the non-elderly. Injury 2015; 46:445-52. [PMID: 25597514 DOI: 10.1016/j.injury.2014.12.031] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 12/01/2014] [Accepted: 12/13/2014] [Indexed: 02/02/2023]
Abstract
Femoral neck fractures represent a relatively uncommon injury in the non-elderly population often resulting from high-energy trauma. The cornerstone of their management is anatomic reduction and stable internal fixation of the femoral neck in an attempt to salvage the femoral head. Complications including avascular necrosis of the femoral head, non-union and post-traumatic osteoarthritis are not uncommon. The clinical outcomes of these patients can be improved with good pre-operative planning, optimization of surgical procedures and introduction of new improved implants and techniques. In the herein study, we attempt to describe the biomechanical properties of the hip and compare the performance of the most commonly used devices. Experimental evidence suggests that in Pauwels type III fracture patterns a cephalomedullary nail was significantly stronger in axial loading. Moreover, in unstable basicervical patterns cannulated screws (triangular configuration) demonstrated a lower ultimate load to failure, whereas in subcapital or transervical patterns both the cannulated screws (triangular configuration) and the sliding hip screw demonstrated no compromise in fixation strength. The fracture pattern appears to be the major determinant of the ideal type of implant to be selected. For a successful outcome each patient needs to be considered on an individual basis taking into account all patient and implant related factors.
Collapse
|