Factors Associated with the Success Rate of Orthodontic Miniscrews Placed in the Upper and Lower Posterior Buccal Region

Abstract Objective: To determine the success rate and the factors related to the success rate of orthodontic miniscrew implants (OMI) placed at the attached gingiva of the posterior buccal region. Materials and Methods: Four hundred eighty OMI placed in 209 orthodontic patients were examined retroactively. The sample was divided into young patients (range 10–18 years, N = 108) and adult patients (range 19–64 years, N = 109). The placement site was divided into three interdental areas from the first premolar to the second molar in the maxilla and mandible. According to soft tissue management, the samples were divided into incision and nonincision groups. Chi-square tests and multiple logistic regression analyses were used. Results: The overall success rate was 83.8%. Dislodgement of the OMI occurred most frequently in the first 1–2 months, and more than 90% of the failures occurred within the first 4 months. Sex, age, jaw, soft tissue management, and placement side did not show any difference in the success rate. Placement site, however, showed a significant difference in the mandible of adult patients. There was no difference in the success rate in the maxilla. Conclusions: Placement site is one of the important factors for success rate of OMI.

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Primary failure rate for 1680 extra-alveolar mandibular buccal shelf mini-screws placed in movable mucosa or attached gingiva

The Angle Orthodontist ◽

10.2319/092714.695.1 ◽

2015 ◽

Vol 85 (6) ◽

pp. 905-910 ◽

Cited By ~ 49

Author(s):

Chris Chang ◽

Sean S.Y. Liu ◽

W. Eugene Roberts

Keyword(s):

Stainless Steel ◽

Soft Tissue ◽

Failure Rate ◽

Alveolar Process ◽

Second Molar ◽

Initial Failure ◽

Attached Gingiva ◽

Significant Difference ◽

Insignificant Difference ◽

The Right

ABSTRACT Objective: To compare the initial failure rate (≤4 months) for extra-alveolar mandibular buccal shelf (MBS) miniscrews placed in movable mucosa (MM) or attached gingiva (AG). Materials and Methods: A total of 1680 consecutive stainless steel (SS) 2 × 12-mm MBS miniscrews were placed in 840 patients (405 males and 435 females; mean age, 16 ± 5 years). All screws were placed lateral to the alveolar process and buccal to the lower first and second molar roots. The screw heads were at least 5 mm superior to the soft tissue. Loads from 8 oz–14 oz (227 g–397 g, 231–405 cN) were used to retract the mandibular buccal segments for at least 4 months. Results: Overall, 121 miniscrews out of 1680 (7.2%) failed: 7.31% were in MM and 6.85% were in AG (statistically insignificant difference). Failures were unilateral in 89 patients and bilateral in 16. Left side (9.29%) failures was significantly greater (P < .001) compared with those on the right (5.12%). Average age for failure patients was 14 ± 3 years. Conclusion: MBS miniscrews were highly successful (approximately 93%), but there was no significant difference between placement in MM or AG. Failures were more common on the patient's left side and in younger adolescent patients. Having 16 patients with bilateral failures suggests that a small fraction of patients (1.9%) are predisposed to failure with this method.

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Success Rate of Obturation of Root Canals by Different Techniques in Primary Molars: A Comparative Clinical Study

Current Dentistry ◽

10.2174/2542579x02999200503032916 ◽

2020 ◽

Vol 2 (1) ◽

pp. 36-44

Author(s):

Satyawan G. Damle ◽

Ritika Bansal ◽

Dhanashree D. Sakhare

Keyword(s):

Success Rate ◽

Study Groups ◽

Primary Molars ◽

Control Group ◽

Second Primary ◽

Chi Square ◽

Exact Test ◽

Root Canals ◽

Significant Difference ◽

Comparative Clinical Study

Objective: To compare the success rate of different obturation procedures in primary mandibular second molars clinically and also by digital radiovisiography. Methods: A total of 40 children aged between 4-8 years with deeply carious mandibular second primary molars indicated for single session pulpectomy were selected. Canals were obturated with Metapex. The 3 study groups (Endodontic plugger, Handheld lentulospiral, Navi Tip syringe) were compared with the control group (reamer) both clinically and radiovisiographically. The data collected were statistically analyzed using Pearson’s Chi-square and Fisher’s exact test. Results: The use of Navi tip syringe led to the least number of voids followed by Endodontic plugger and Reamer and the highest number of voids was reported with Lentulospiral. Navitip presented maximum number of optimally filled cases followed by Endodontic plugger and Lentulospiral and least number of optimally filled cases with reamer. However, there was no statistically significant difference (p>0.05) in any of the groups with clinical (pain and tenderness to percussion) and radiographic parameters (presence or absence of voids and length of obturation). Conclusion: Within the limitations of the present study, though the clinical outcome was statistically insignificant, Navitip syringe exhibited encouraging results and is a promising option for obturation in primary teeth.

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Evaluation of crestal bone resorption around cylindrical and conical implants following 6 months of loading: A randomized clinical trial

European Journal of Dentistry ◽

10.4103/ejd.ejd_38_17 ◽

2017 ◽

Vol 11 (03) ◽

pp. 317-322 ◽

Cited By ~ 1

Author(s):

Naser Sargolzaie ◽

Hamid Reza Arab ◽

Marzieh Mohammadi Moghaddam

Keyword(s):

Bone Loss ◽

Chi Square ◽

Pocket Depth ◽

Significance Level ◽

Crestal Bone Loss ◽

Significant Difference ◽

Chi Square Test ◽

Male Patients ◽

Maxilla And Mandible

ABSTRACT Objective: The purpose of this clinical study was to evaluate the effect of implant body form (cylindrical and conical implants) on crestal bone levels during 6 months' follow-up after loading. Materials and Methods: A total of 32 SPI implants (19 conical implants/13 cylindrical implants) were randomly placed in 12 male patients using a submerged approach. None of the patients had compromising medical conditions or parafunctional habits. Periapical radiographs using the parallel technique were taken after clinical loading and 6 months later. Clinical indices including pocket depth and bleeding on probing (BOP) were recorded on 6-month follow-up. Data were analyzed by independent samples t-test and Chi-square test with a significance level of 0.05. Results: Six months after loading, crestal bone loss was 0.84 (±0.29) mm around the cylindrical implants and 0.73 (±0.62) mm around the conical types, which was not significantly different (P = 0.54). Pocket depth around the cylindrical and conical implants was 2.61 (±0.45) mm and 2.36 (±0.44) mm, respectively (P = 0.13). BOP was observed among 53.8% and 47.4% of the cylindrical implants and conical (P = 0.13). Bone loss and pocket depth in the maxilla and mandible had no significant difference (P = 0.46 and P = 0.09, respectively). Conclusion: In this study, although bone loss and clinical parameters were slightly higher in the cylindrical implants, there was no significant difference between the conical- and cylindrical-shaped implants.

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Digital Assessment of Gingival Dimensions of Healthy Periodontium

Journal of Clinical Medicine ◽

10.3390/jcm10081550 ◽

2021 ◽

Vol 10 (8) ◽

pp. 1550

Author(s):

Hyun-Chang Lim ◽

Jaemin Lee ◽

Dae-Young Kang ◽

In-Woo Cho ◽

Hyun-Seung Shin ◽

...

Keyword(s):

Computer Software ◽

Distribution Patterns ◽

Similar Distribution ◽

Second Molar ◽

Digital Assessment ◽

Attached Gingiva ◽

Digital Scanning ◽

Gingival Dimensions ◽

Mandibular First Premolar ◽

Maxilla And Mandible

The aim of the present study was to re-visit the gingival dimension using digital scanning in a healthy Korean population. Forty-eight periodontally healthy volunteers (38 males and 10 females, mean age: 24.3 ± 2.2 years) were included. The mucogingival junction was highlighted using 2.5% diluted iodine solution. Then, the facial gingiva and mucosa of both jaws were digitally scanned using an intraoral digital scanner. Using computer software and periodontal probing, the heights and areas of keratinized gingiva (KG) and attached gingiva (AG) were measured. Similar distribution patterns in the gingival heights were noted in the maxilla and mandible. The maxilla showed substantially greater gingival values than the mandible. The heights of the KG and AG were notably smaller on the mandibular first premolar (2.37 mm and 1.07 mm, median value) and second molar (3.28 mm and 1.78 mm) than on the other teeth. The area of the KG was the largest in the canine (63.74 mm2 and 46.85 mm2) and first molar (64.14 mm2 and 58.82 mm2) in each jaw. Mandibular first and second molars, mandibular canine, and maxillary canine showed the highest value of the area under the receiver operation characteristics curve (>0.7) for differentiating between males and females. The gingival dimensions recorded using intraoral scanner demonstrated similar distribution patterns as in previous studies.

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Outcome of Endodontic Treatment of Teeth Filled Using Lateral Condensation versus Vertical Compaction (Schilder's Technique)

The Journal of Contemporary Dental Practice ◽

10.5005/jcdp-7-1-17 ◽

2006 ◽

Vol 7 (1) ◽

pp. 17-24 ◽

Cited By ~ 13

Author(s):

Jamal A. Aqrabawi

Keyword(s):

Success Rate ◽

Endodontic Treatment ◽

Single Session ◽

Treatment Results ◽

Chi Square ◽

Periapical Lesions ◽

Gutta Percha ◽

Significant Difference ◽

Chi Square Analysis ◽

Radiographic Investigation

Abstract The purpose of this prospective clinical and radiographic investigation was to assess the treatment results following endodontic therapy of teeth filled with lateral condensation versus teeth filled with vertical compaction of warm gutta-percha. A total of 290 patients were treated using the standardized step-back technique for canal preparation, which were filled with either lateral condensation or vertical compaction in one single session. Five years later, the treatment results were assessed clinically and radiographically and related to the type of the obturation technique using Chi-square analysis. Of the 340 teeth that were reexamined, 160 teeth were filled with lateral condensation, and 180 teeth were filled with vertical condensation. The results showed a significantly higher success rate for the vertical compaction versus the lateral condensation technique of teeth presented with preoperative periapical lesions P<0.04. Regardless of the preoperative periapical status of the teeth, no statistically significant difference was found between the two techniques. The overall success rate of both filling techniques was 80.3%. Citation Aqrabawi JA. Outcome of Endodontic Treatment of Teeth Filled Using Lateral Condensation versus Vertical Compaction (Schilder's Technique). J Contemp Dent Pract 2006 February;(7)1:017-024.

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Cephalometric Hard and Soft Tissue Norms for Sudanese Adults

Orthodontic Journal of Nepal ◽

10.3126/ojn.v5i2.15222 ◽

2015 ◽

Vol 5 (2) ◽

pp. 28-32

Author(s):

Eman I Salama ◽

Amal H Abuaffan

Keyword(s):

Soft Tissue ◽

Orthodontic Treatment ◽

Normative Values ◽

Racial Groups ◽

Tissue Analysis ◽

Linear Measurements ◽

Facial Profile ◽

Mean Values ◽

Significant Difference ◽

Maxilla And Mandible

Introduction: Cephalometric norms of various populations show differences between diverse ethnic and racial groups. Thus, numbers of cephalometric norms have been established for different ethnic groups.Objective: To assess skeletal, dental and soft tissue features in a sample of well-balanced face of Sudanese university students.Materials & method: Lateral cephalographs were taken from 18-25 years old 35 male and 38 female Sudanese university students with balanced facial profile and Class I occlusion with no previous orthodontic treatment. Fourteen angular and five linear measurements, and facial index were recorded according to Husund analysis. Male and female mean values were compared statistically using Student t-test.Result: Statistically significant differences were noted between both genders especially in skeletal variables SNA˚, SNB˚, SNPg˚, ML- NSL˚, NL-NSL˚, UFH, LFH and dental variable I -Ī. Holdaway angle showed no significant difference between the genders. Skeletally, maxilla and mandible of the Sudanese sample were more prognathic compared to Caucasians and Arabs but less prognathic than the Africans. Dentally, maxillary and mandibular incisors were more proclined compared to Arabs and Caucasians. Soft tissue analysis showed more lip protrusion in Sudanese adults.Conclusion: The study offered normative cephalometric standards for Sudanese adults, which were specific for each gender group. The normative values showed that the Sudanese sample lied between African and Arab values which might suggest that the studied sample had an Afro-Arabian mixture.

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External root resorption of second molars caused by impacted third molars: an observational study in panoramic radiographs

Revista de Odontologia da UNESP ◽

10.1590/1807-2577.09117 ◽

2018 ◽

Vol 47 (1) ◽

pp. 25-30

Author(s):

Jhonatan Thiago LACERDA-SANTOS ◽

Gélica Lima GRANJA ◽

Jalber Almeida dos SANTOS ◽

Julliana Cariry PALHANO-DIAS ◽

José Cadmo Wanderley Peregrino de ARAÚJO-FILHO ◽

...

Keyword(s):

Root Resorption ◽

Young Patients ◽

Third Molar ◽

Third Molars ◽

Chi Square ◽

Cross Sectional ◽

Exact Test ◽

Panoramic Radiographs ◽

Second Molar ◽

External Root Resorption

Abstract Objective This research investigate the presence of external root resorption (ERR) in second molars caused by impacted third molars in panoramic radiographs, relating to the position of third molars according to classification of Winter, Pell and Gregory. Material and method A cross-sectional, retrospective study using panoramic radiographs obtained from January 2014 to December 2015. The inclusion criterion was the presence of a second molar adjacent to an impacted third molar. Data were analyzed using descriptive and inferential statistics. Pearson's Chi-Square Test and Fisher's Exact Test (p≤0.05) were performed. Result The sample consisted of 584 panoramic radiographs, 356 (60.95%) of women, and 228 (39.05%) of men, the mean age was 25.31 years. The prevalence of ERR was 12.5%, and the group of 14-24 year olds was the most affected (p = 0.46). The presence of ERR was statistically higher in the mandible (42.1%) with p=0.01. The ERR located in the cervical (57.1%) and medium (58.8%) thirds was proportionally higher in the teeth with B2 (p=0.02) and mesio-angular positions (p=0.26). Conclusion The prevalence of ERR in second molars, caused by impacted third molars, was shown to be similar to results found in the literature, with no gender preference, this affects young patients, occurring frequently in mandible teeth, and presents greater severity in the cervical and middle thirds. The B2 and mesio-angular positions were more prone to ERR.

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Associations between influence of infant feeding patterns on the deciduous second molar relationship in preschool-aged children

Majalah Kedokteran Gigi Indonesia ◽

10.22146/majkedgiind.39227 ◽

2019 ◽

Vol 1 (1) ◽

pp. 23

Author(s):

Hilda Fitria Lubis ◽

Sasha Allayya Tiffany

Keyword(s):

Infant Feeding ◽

Sampling Technique ◽

Feeding Patterns ◽

Chi Square ◽

Primary Molar ◽

Cross Sectional ◽

Significance Level ◽

Second Molar ◽

Significant Difference ◽

Preschool Aged Children

Exclusive breastfeeding during the first six months of life is extremely important for the development of the dentocraniofacial structure, occlusion, breathing and swallowing during childhood. The prevalence severity rate of malocclusion in children who were breastfed is lower than those who were bottle-fed. The aim of this study is to evaluate the associations of infant feeding patterns on the deciduous second molar relationship in preschool aged children (3-5 years old children) of selected preschools in and around Medan Selayang. This study used analytic cross-sectional study design as the research method. The sampling was carried out by purposive sampling technique. This study involved 130 children aged 3-5 years as the sample, who consisted of two groups, the exclusively breastfed group and the bottle-fed group with the inclusion criteria of the children having a good oral and dental health. The result is statistically analyzed using Chi Square with a significance level of p<0.05. There was a significant difference between children who were breastfed and those who were bottle-fed. Children who were breastfed mostly had mesial step (55, 4%), followed by distal step(27.7%) and flush (16.9%), while those children who were bottle-fed mostly had distal step (46.2%), flush (33.8%), and mesial steps (20%). Based on Chi Square test, it is shown that there is a significant relationship between infant feeding patterns to primary molar relationships (p<0.001).

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Free Gingival Graft Immobilization: A Pilot Study on a Newly Designed Stent

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-09-00034 ◽

2010 ◽

Vol 36 (2) ◽

pp. 123-130 ◽

Cited By ~ 2

Author(s):

Ali Hassani ◽

Roozbeh Sadrimanesh ◽

Seyed Aliakbar Vahdati ◽

Pooyan Sadr-eshkevari

Keyword(s):

Soft Tissue ◽

Soft Tissue Management ◽

Oral Rehabilitation ◽

Recipient Site ◽

Free Gingival Graft ◽

Attached Gingiva ◽

Edentulous Mandible ◽

Edentulous Patients ◽

Gingival Graft

Abstract The presence of adequate gingiva with firm attachment to the underlying periosteum and bone is important for the overall long-term success of implant-supported oral rehabilitation. In the presence of an atrophic edentulous mandible, peri-implant soft tissue management is a challenging task. Therefore, mucosal grafts are sometimes necessary in patients with insufficient attached gingiva around abutments. Immobilization of this graft is mandatory for its survival. The study design included 5 edentulous patients with inadequate attached gingival zone, all candidates for implant surgery and free gingival graft. In the first surgery the implants were inserted, and in the second operation a free gingival graft was obtained from the palate and sutured to the mandibular site. A newly designed stent was applied for the stabilization of the graft. Two to 3 weeks after the second surgery, the stents were removed and the attached gingival width was measured. Long-term evaluations were performed to follow the survival of the graft. All grafts were intact at the time of stent removal. In all cases, the long-term evaluations revealed adequate attached gingiva around the implant. It may be concluded that immobilization of free gingival graft in the recipient site increases its success rate and its survival rate. The application of the newly designed stent can serve as a proper and easy immobilizer for peri-implant soft tissue management.

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Outcome of primary endoscopic dacrocystorhinostomy with and without stent: a randomised prospective study

International Journal of Otorhinolaryngology and Head and Neck Surgery ◽

10.18203/issn.2454-5929.ijohns20175614 ◽

2017 ◽

Vol 4 (1) ◽

pp. 137

Author(s):

Rajesh Pandey ◽

Pramod Kumar Yadav ◽

Amit Kumar Patel ◽

Poonam Rani

Keyword(s):

Success Rate ◽

Surgical Outcome ◽

Nasolacrimal Duct ◽

Sinus Surgery ◽

P Value ◽

Chi Square ◽

Endoscopic Endonasal ◽

Significant Difference ◽

Endonasal Dcr ◽

Endoscopic Dcr

Background: The introduction of endoscopes with different degrees of angulation for endoscopic sinus surgery led to widespread use of endoscopic endonasal DCR (EDCR). The results of EDCR are not only encouraging, but are associated with many other additional advantages. Many modifications like LASER assisted endoscopic DCR, use of silicon tube for stenting, mitomycin-C application etc. have been described. However, insertion of silicon stent in endonasal DCR is most commonly used procedure. Many surgeons claim that use of silicon stent improves success rate of endoscopic DCR. On the other hand, some studies indicate that silicon stent itself is a reason for surgical failure. The present study was done to compare surgical outcome and complication of endoscopic DCR with and without silicon stent. Methods: 70 cases (total 90 EDCR) randomly taken for study. In 35 EDCR cases lacrimal stent were used and in 55 EDCR cases stent were not used. Success rate in both group was analysed using chi-square test. P value <0.05 was considered as significant. Results: We found a success rate of 90.9% and 85.7% for group A (stent not used) and group B (stent used) respectively. The statistic evaluation among these groups does not show any significant difference (p=0.445) which means that insertion of stent in cases of primary EDCR does not significantly change the surgical outcome. Conclusions: Endonasal DCR without silicon stent is considering as effective, safe and minimally invasive primary procedure for treatment of nasolacrimal duct obstruction. Role of using stent in primary EDCR is not very promising because it is not improving the outcome of surgery.

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