scholarly journals Accuracy of Computer-Aided Dynamic Navigation Compared to Computer-Aided Static Navigation for Dental Implant Placement: An In Vitro Study

2019 ◽  
Vol 8 (12) ◽  
pp. 2123 ◽  
Author(s):  
Alfonso Mediavilla Guzmán ◽  
Elena Riad Deglow ◽  
Álvaro Zubizarreta-Macho ◽  
Rubén Agustín-Panadero ◽  
Sofía Hernández Montero
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
Navigation System ◽  
T Test ◽  
Implant Placement ◽  
Planning Software ◽  
Computer Aided ◽  
Dynamic Navigation ◽  
Group A ◽  
Group B

Aim: To analyze the accuracy capability of two computer-aided navigation procedures for dental implant placement. Materials and Methods: A total of 40 dental implants were selected, which were randomly distributed into two study groups, namely, group A, consisting of those implants that were placed using a computer-aided static navigation system (n = 20) (guided implant (GI)) and group B, consisting of those implants that were placed using a computer-aided dynamic navigation system (n = 20) (navigation implant (NI)). The placement of the implants from group A was performed using surgical templates that were designed using 3D implant-planning software based on preoperative cone-beam computed tomography (CBCT) and a 3D extraoral surface scan, and the placement of group B implants was planned and performed using the dynamic navigation system. After placing the dental implants, a second CBCT was performed and the degree of accuracy of the planning and placement of the implants was analyzed using therapeutic planning software and Student’s t-test. Results: The paired t-test revealed no statistically significant differences between GI and NI at the coronal (p = 0.6535) and apical (p = 0.9081) levels; however, statistically significant differences were observed between the angular deviations of GI and NI (p = 0.0272). Conclusion: Both computer-aided static and dynamic navigation procedures allow accurate implant placement.

scholarly journals Accuracy of Computer-Aided Dynamic Navigation Compared to Computer-Aided Static Procedure for Endodontic Access Cavities: An In Vitro Study

2020 ◽  
Vol 9 (1) ◽  
pp. 129 ◽  
Author(s):  
Álvaro Zubizarreta-Macho ◽  
Ana de Pedro Muñoz ◽  
Elena Riad Deglow ◽  
Rubén Agustín-Panadero ◽  
Jesús Mena Álvarez
Keyword(s):  
Navigation System ◽  
In Vitro Study ◽  
Study Groups ◽  
T Test ◽  
Anterior Teeth ◽  
Planning Software ◽  
Computer Aided ◽  
Dynamic Navigation ◽  
Group B

Purpose: To analyze the accuracy of two computer-aided navigation techniques to guide the performance of endodontic access cavities compared with the conventional access procedure. Materials and Methods: A total of 30 single-rooted anterior teeth were selected, which were randomly distributed into three study groups: Group A—guided performance of endodontic access cavities through computer-aided static navigation system (n = 10) (SN); Group B—guided performance of endodontic access cavities through computer-aided dynamic navigation system (n = 10) (DN); and Group C—manual (freehand) performance of endodontic access cavities (n = 10) (MN). The endodontic access cavities of the SN group were performed with a stereolithography template designed on 3D implant planning software, based on preoperative cone-beam computed tomography (CBCT) and a 3D extraoral surface scan, and endodontic access cavities of the DN group were planned and performed by the dynamic navigation system. After endodontic access cavities were performed, a second CBCT was done, and the degree of accuracy between the planned and performed endodontic access cavities was analyzed using therapeutic planning software and Student’s t-test. Results: Paired t-test revealed no statistically significant differences between SN and DN at the coronal (p = 0.6542), apical (p = 0.9144), or angular (p = 0.0724) level; however, statistically significant differences were observed between the two computer-aided navigation techniques and the MN group at the coronal (p < 0.0001), apical (p < 0.0001), and angular (p < 0.0001) level. Conclusion: Both computer-aided static and dynamic navigation procedures allowed accurate performance of endodontic access cavities.

Assessment of the Correlation Between Insertion Torque and Resonance Frequency Analysis of Implants Placed in Bone Tissue of Different Densities

2014 ◽  
Vol 40 (3) ◽  
pp. 259-262 ◽  
Author(s):  
Luiz Carlos Magno Filho ◽  
Fabiano Ribeiro Cirano ◽  
Fernando Hayashi ◽  
Hsu Shao Feng ◽  
Alexandre Conte ◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Dental Implants ◽  
Frequency Analysis ◽  
Pearson Correlation ◽  
T Test ◽  
Insertion Torque ◽  
Type I ◽  
Resonance Frequency Analysis ◽  
Group A ◽  
Group B

The primary stability of dental implants is fundamental for osseointegration. Therefore, this study aimed to assess the correlation between insertion torque (IT) and resonance frequency analysis (RFA) of implants placed in mandibles and maxillas of different bone densities. Eighty dental implants were placed in maxillas and mandibles, and IT and the implant stability quotient (ISQ) were measured at the time of implant insertion. Bone density was assessed subjectively by the Lekholm and Zarb index. The type I and II densities were grouped together (group A)as were the type III and IV densities (group B). The IT in group A was higher (Student t test, P = .0013) than in group B (46.27 ± 18.51 Ncm, 33.62 ± 14.74 Ncm, respectively). The implants placed in group A showed higher ISQ (Student t test, P = .0004) than those placed in group B (70.09 ± 7.50, 63.66 ± 8.00, respectively). A significant correlation between IT and the ISQ value was observed for group A (Pearson correlation test; r = 0.35; P = .0213) and for group B (r = 0.37; P = .0224). Within the limitations of this study, it was possible to conclude that there is a correlation between IT and RFA of implants placed in mandibles and maxillas of different bone densities.

Evaluation of a dynamic navigation system for training students in dental implant placement

2020 ◽  
Author(s):  
Yalin Zhan ◽  
Miaozhen Wang ◽  
Xueyuan Cheng ◽  
Yi Li ◽  
Xiaorui Shi ◽  
...  
Keyword(s):  
Dental Implant ◽  
Navigation System ◽  
Implant Placement ◽  
Dynamic Navigation

The Efficacy of Mylohyoid Nerve Anesthesia in Dental Implant Placement at the Edentulous Posterior Mandibular Ridge

2012 ◽  
Vol 38 (2) ◽  
pp. 141-147 ◽  
Author(s):  
Hasan Ayberk Altug ◽  
Metin Sencimen ◽  
Altan Varol ◽  
Necdet Kocabiyik ◽  
Necdet Dogan ◽  
...  
Keyword(s):  
Dental Implant ◽  
Nerve Block ◽  
Inferior Alveolar Nerve ◽  
Alternative Methods ◽  
Implant Surgery ◽  
Implant Placement ◽  
Edentulous Mandible ◽  
Group A ◽  
Mylohyoid Nerve ◽  
Group B

The aim of this study is to evaluate the anesthetic efficacy of mylohyoid and buccal nerve anesthesia at the posterior edentulous mandible versus regional anesthetic block to the inferior alveolar nerve in dental implant surgery. The study was composed of 2 groups. In the first group (group A), 14 voluntary adults (7 female and 7 male) received local infiltrations of 1 mL articaine HCl 4% with epinephrine 1/200 000 to the ipsilateral mylohyoid and buccal nerves. In the second group (group B, control; 9 female and 5 male adults), the inferior alveolar and the buccal nerve blocks were performed. Visual analog scales were obtained from patients to determine the level of pain during incision, drilling, implant placement, and suturing stages of implant surgery. A combination of buccal and mylohyoid nerve block offered an acceptable level of anesthesia. Two patients from group A stopped the ongoing surgery and had extraregional anesthesia by inferior alveolar nerve block. In group B, patients were operated on successfully. Local anesthetic infiltrations of the mylohyoid and the buccal nerve may be considered alternative methods of providing a convenient anesthetic state of the posterior mandibular ridge.

scholarly journals Influence of the Digital Mock-Up and Experience on the Ability to Determine the Prosthetically Correct Dental Implant Position during Digital Planning: An In Vitro Study

2019 ◽  
Vol 9 (1) ◽  
pp. 48
Author(s):  
Miriam O’Connor Esteban ◽  
Elena Riad Deglow ◽  
Álvaro Zubizarreta-Macho ◽  
Sofía Hernández Montero
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
In Vitro Study ◽  
Study Groups ◽  
T Test ◽  
Dental Surgery ◽  
Operator Experience ◽  
Planning Software ◽  
Before And After

The purpose of this study was to analyze the influence of the digital mock-up and operator experience on the dental implant planning position. A total of 200 dental implants were planned, which were distributed into two study groups: A. dental implant planning by dental surgeons with 5–10 years of experience (n = 80); and B. dental implant planning by dental surgery students without experience (n = 120). Operators were required to plan eight dental implants in the same maxillary edentulous case uploaded in 3D implant-planning software, before and after using the digital mock-up. Deviations between the dental implant planning positions before and after using the digital mock-up were analyzed at platform, apical and angular levels, and were analyzed using a 3D implant-planning software using Student’s t test. The paired t-test revealed statistically significant differences between the deviation levels of participants with 5–10 years’ experience and no experience at the platform, apical and angular levels. Digital mock-ups allow for more accurate dental implant planning regardless of the experience of the operator. Nevertheless, they are more useful for operators without dental surgery experience.

scholarly journals Comparing Accuracy of Implant Installation with a Navigation System (NS), a Laboratory Guide (LG), NS with LG, and Freehand Drilling

2020 ◽  
Vol 17 (6) ◽  
pp. 2107 ◽  
Author(s):  
Ting-Mao Sun ◽  
Huey-Er Lee ◽  
Ting-Hsun Lan
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
Navigation System ◽  
Surgical Guide ◽  
Implant Placement ◽  
Surgical Methods ◽  
Cone Beam Computerized Tomography ◽  
The One ◽  
Dental Implant Surgery ◽  
Missing Tooth

The aim of this study was to compare the accuracy of implant placement by using the conventional freehand method, the surgical guide alone, the dental navigation system alone, and the dental navigation system with a surgical guide. The participants were aged 20 years or older and were requiring dental implant surgery according to an assessment made by a dentist between July 2014 and December 2017. A total of 128 dental implants were inserted, 32 dental implants in each group, and participants with similar or identical age (i.e., 20–50 years or 50 years or above) and missing tooth locations were paired for comparison. Accuracy was measured by overlaying the real position in the postoperative Cone Beam Computerized Tomography (CBCT) on the virtual presurgical placement of the implant in a CBCT image. Using the dental navigation system with a surgical guide could help dentists to position implants more accurately. Total, longitudinal, and angular error deviation were significantly different (p < 0.0001). The same level of accuracy could be obtained for the different jaws and tooth positions. The one-way analysis of variance (ANOVA) showed that the total, longitudinal, and angular errors differed significantly (p < 0.0001). A comparison of the four dental implant surgical methods indicated that the combination of a dental implant navigation system and a surgical guide kit achieved the highest accuracy in terms of the different tooth positions and jaws.

COMPARISON OF EFFECTIVENESS OF MOBILIZATION AND SELF-EXERCISES IN ADHESIVE CAPSULITIS OF SHOULDER

2018 ◽  
Vol 7 (1) ◽  
pp. 35-41
Author(s):  
Muhammad Usman Khan ◽  
Ghazala Noor Nizami ◽  
Ali Farhad
Keyword(s):  
Pain Intensity ◽  
Adhesive Capsulitis ◽  
Descriptive Analysis ◽  
Tertiary Care ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
T Test ◽  
P Value ◽  
Group A ◽  
Group B

OBJECTIVE To compare the effectiveness of mobilization and self-exercises in the management of adhesive capsulitis of shoulder STUDY DESIGN Randomized Control Trial SAMPLE SELECTION 30 patients of adhesive capsulitis of shoulder from physiotherapy department of tertiary care hospitals of Karachi were selected through simple random sampling technique. PROCEDURE Treatment was continued for 5 days per week for the period of 3 weeks followed by assessment. Patients were randomly divided into two equal groups. Group A was treated with midrange mobilization while group B performed self-exercises. Both groups received TENS and hot pack prior to the exercises. Mean ± SD, frequencies and percentages were used for descriptive analysis. ROM via goniometry and pain intensity through VAS was analyzed by paired t-test within the groups and by independent t-test between the groups, using SPSS. P-value of less than 0.05 was considered significant. RESULTS 60% were females (n=18) and 40% were males (n=12) with mean age of 50.17±6.37 years. Significant improvement (p-value <0.05) in pain and shoulder ROM was observed among patients of Group A as compared to Group B. Pain intensity was decreased to 1.67 ± 0.62 in group A, whereas ROMs in these patients were also better than other group.

scholarly journals The Bone Buttress Theory: The Effect of the Mechanical Loading of Bone on the Osseointegration of Dental Implants

Biology ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 12
Author(s):  
David Chavarri-Prado ◽  
Aritza Brizuela-Velasco ◽  
Ángel Álvarez-Arenal ◽  
Markel Dieguez-Pereira ◽  
Esteban Pérez-Pevida ◽  
...  
Keyword(s):  
Dental Implants ◽  
Mechanical Loading ◽  
Bone Growth ◽  
Bone Matrix ◽  
Test Group ◽  
Control Group ◽  
Group A ◽  
Bone To Implant Contact ◽  
The Stability ◽  
Group B

Objectives: To determine the effect of mechanical loading of bone on the stability and histomorphometric variables of the osseointegration of dental implants using an experimental test in an animal model. Materials and Methods: A total of 4 human implants were placed in both tibiae of 10 New Zealand rabbits (n = 40). A 6-week osseointegration was considered, and the rabbits were randomly assigned to two groups: Group A (Test group) included 5 rabbits that ran on a treadmill for 20 min daily during the osseointegration period; Group B (Controls) included the other 5 that were housed conventionally. The monitored variables were related to the primary and secondary stability of the dental implants (implant stability quotient—ISQ), vertical bone growth, bone to implant contact (BIC), area of regenerated bone and the percentage of immature matrix. Results: The results of the study show a greater vertical bone growth (Group A 1.26 ± 0.48 mm, Group B 0.32 ± 0.47 mm, p < 0.001), higher ISQ values (Group A 11.25 ± 6.10 ISQ, 15.73%; Group B 5.80 ± 5.97 ISQ, 7.99%, p = 0.006) and a higher BIC (Group A 19.37%, Group B 23.60%, p = 0.0058) for implants in the test group, with statistically significant differences. A higher percentage of immature bone matrix was observed for implants in the control group (20.68 ± 9.53) than those in the test group (15.38 ± 8.84) (p = 0.108). A larger area of regenerated bone was also observed for the test implants (Group A 280.50 ± 125.40 mm2, Group B 228.00 ± 141.40 mm2), but it was not statistically significant (p = 0.121). Conclusions: The mechanical loading of bone improves the stability and the histomorphometric variables of the osseointegration of dental implants.

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