Amparo Aloy-Prósper

The outcome of intraoral onlay block bone grafts on alveolar ridge augmentations: a systematic review.

Aim: The purpose of this study was to systematically review clinical studies examining the survival and success rates of implants placed with intraoral onlay autogenous bone grafts to answer the following question: do ridge augmentations procedures with intraoral onlay block bone grafts in conjunction with or prior to implant placement influence implant outcome when compared with a control group (guided bone regeneration, alveolar distraction, native bone or short dental implants.)? Material and Method: An electronic data banks and hand searching were used to find relevant articles on vertical and lateral augmentation procedures performed with intraoral onlay block bone grafts for dental implant therapy published up to October 2013. Publications in English, on human subjects, with a controlled study design –involving at least one group with defects treated with intraoral onlay block bone grafts, more than five patients and a minimum follow-up of 12 months after prosthetic loading were included. Two reviewers extracted the data. Results: A total of 6 studies met the inclusion criteria: 4 studies on horizontal augmentation and 2 studies on vertical augmentation. Intraoperative complications were not reported. Most common postsurgical complications included mainly mucosal dehiscences (4 studies), bone graft or membrane exposures (3 studies), complete failures of block grafts (2 studies) and neurosensory alterations (4 studies). For lateral augmentation procedures, implant survival rates ranged from 96.9% to 100%, while for vertical augmentation they ranged from 89.5% to 100%. None article studied the soft tissues healing. Conclusions: Survival and success rates of implants placed in horizontally and vertically resorbed edentulous ridges reconstructed with block bone grafts are similar to those of implants placed in native bone, in distracted sites or with guided bone regeneration. More surgical challenges and morbidity arise from vertical augmentations, thus short implants may be a feasible option. Key words:Alveolar ridge augmentation, intraoral bone grafts, onlay grafts, block grafts, dental implants.

Implant Treatment in Atrophic Posterior Mandibles: : Vertical Regeneration with Block Bone Grafts Versus Implants with 5.5-mm Intrabony Length

PURPOSE To retrospectively compare the outcomes of implants placed in posterior mandibles vertically regenerated with onlay autogenous block bone grafts and short dental implants. MATERIALS AND METHODS Consecutive patients with vertical bone atrophy in edentulous mandibular posterior regions (7 to 8 mm of bone above the inferior alveolar nerve) were treated with either implants placed in regenerated bone using autologous block bone grafts (group 1) or short implants (with 5.5-mm intrabony length) in native bone (group 2) between 2005 and 2010 and followed for 12 months after loading. The procedure used was the established treatment protocol for this type of patient at the Oral Surgery Unit (University of Valencia, Spain) at the time of surgery. All grafts were obtained using piezosurgery. The outcomes assessed were: complications related to the procedure, implant survival, implant success, and peri-implant marginal bone loss. Statistical analysis was done using the Fisher exact test and the Mann-Whitney test. RESULTS Thirty-seven patients were included, 20 (45 implants) in group 1 and 17 (35 implants) in group 2. In group 1, 13 implants were less than 10 mm long (2 were 7 mm and 11 were 8.5 mm), and 32 were 10 mm or longer; the diameter was 3.6 mm in 6 implants, 4.2 mm in 31, and 5.5 mm in 8. In group 2 all implants were 7 mm long; the diameter measured 4.2 mm in 14 implants and 5.5 mm in 21 implants. Complications related to the block bone grafting procedure were temporary hypoesthesia in one patient, wound dehiscence with graft exposure in three patients, and exposure of the osteosynthesis screw without bone graft exposure in one patient. After 12 months, implant survival rates were 95.6% in group 1 and 97.1 % in group 2; success rates were 91.1% and 97.1%, respectively. The average marginal bone loss was 0.7 ± 1.1 mm in group 1 and 0.6 ± 0.3 mm in group 2. CONCLUSIONS When residual bone height over the mandibular canal is between 7 and 8 mm, short implants (with 5.5-mm intrabony length) might be a preferable treatment option over vertical augmentation, reducing chair time, expense, and morbidity.

Localized lateral alveolar ridge augmentation with block bone grafts: simultaneous versus delayed implant placement: a clinical and radiographic retrospective study.

PURPOSE To retrospectively evaluate the 1-year outcome of implant therapy involving localized lateral alveolar ridge augmentation with block bone grafts, and to compare outcomes of implants inserted simultaneously with grafting or after a healing period. MATERIALS AND METHODS Consecutively treated patients undergoing alveolar ridge augmentation with autogenous intraoral block grafts before or simultaneous with implant placement between 2005 and 2010 in the Oral Surgery Unit of the University of Valencia were included. The selection of procedure (simultaneous vs delayed implant placement, donor site) was based upon the criterion of the surgeon and thorough evaluation of each patient. All grafts were obtained with piezosurgery. Complications related to augmentation, implant survival, implant success, and peri-implant marginal bone loss were assessed. RESULTS Forty-two patients were included; 45 sites were augmented and 71 implants were inserted (33 delayed and 38 simultaneously). Complications (temporary paresthesia, wound dehiscence with bone graft exposure, and exposure of osteosynthesis screw) occurred after bone harvesting in nine patients; four were in the simultaneous group and five were in the delayed group. Six grafts were not successful; four were lost and two provided insufficient bone (after resorption) for ideal implant placement. The implant survival rate was 98.5% (100% for simultaneous and 96.9% for delayed implants) and the implant success rate was 92.9% (89.5% for simultaneous and 96.9% for delayed implants). Average marginal bone loss 1 year after loading was significantly higher for simultaneously placed implants (0.69 ± 0.67 mm) than for delayed implants (0.20 ± 0.50 mm). CONCLUSIONS In lateral bone atrophy, block bone grafts provided sufficient bone for implant therapy, with few complications. Both simultaneous and delayed implant placement yielded high implant survival and success rates. Average marginal bone loss was significantly higher around simultaneously inserted implants.

Clinical Characteristics, Treatment, and Evolution in 14 Cases of Pediatric Orofacial Lymphangioma

PURPOSE To present the largest series of orofacial lymphangioma in children published to date, analyzing the clinical characteristics and evolution of, and the treatment used for, these lesions. MATERIALS AND METHODS The clinical data from patients diagnosed with orofacial lymphangioma, who were treated from 1998 to 2008 at the Oral and Maxillofacial Surgery Unit, Childrens Hospital La Fe of Valencia (age 0 to 14 years), were reviewed. All patients with a clinical, radiographic, or, in surgical cases, histopathologic, diagnosis of orofacial lymphangioma were included. RESULTS A total of 14 patients (8 boys and 6 girls; mean age 4.6 years) were included in the present study. Of the 14 cases, 9 had been diagnosed before the patients were 2 years old and 2 of which were congenital; 8 cases were located on the dorsum of the tongue. The lesion diameter was 1 to 2 cm in 9 patients, with 1 less than 1 cm, and was larger than 2 cm in 5. For treatment, 4 lymphangiomas were monitored periodically and resolved spontaneously, 1 was treated with sclerotherapy, and 9 with surgical extirpation. After surgery, 2 patients developed a recurrence within 13 months. CONCLUSIONS Most of the lymphangiomas diagnosed in children occurred before 2 years of age, were on the dorsum of the tongue, and had a mean size of 1 to 2 cm. Of those treated with surgical extirpation, 2 recurred.

Marginal bone loss in relation to platform switching implant insertion depth: An update.

A review is made, analyzing marginal bone loss in relation to the depth of implant insertion with platform switching, according to the position of the neck (supracrestal, crestal or subcrestal), and evaluating survival of the implants. A PubMed search was made of the studies in animals and humans published between 2005 and 2011, specifying platform insertion depth (supracrestal, crestal or subcrestal) and registering marginal bone loss from the time of prosthetic restoration to the end of follow-up (minimum 6 months). A total of 30 studies were included. The bone loss associated with implants placed at supracrestal level was slightly smaller than in the case of implants placed at subcrestal level, though statistical significance was not reached. The mean marginal bone loss values were 0.0 mm to 0.9±0.4 mm for the implants with the neck located at supracrestal level; 0.05 mm to 1.40±0.50 mm for those at subcrestal level; and 0.26±0.22 mm to 1.8±0.39 mm for those in a crestal location, after 6-60 months of follow-up. The survival rate was 88.6-100% for the implants with the neck positioned at crestal level, versus 98.3-100% below the crest, and 100% above the crest. The heterogeneity of the studies (surgical technique, platform surface texture, radiographic measurement techniques, etc.) made it difficult to establish a relationship between marginal bone loss and the supracrestal, crestal or subcrestal location of platform switching. Key words:Dental implants, platform switching, insertion depth, crestal insertion level, bone loss.

Peri-implant Hard and Soft Tissue Stability in Implants Placed Simultaneously Versus Delayed with Intraoral Block Bone Grafts in Horizontal Defects: A Retrospective Case Series Study.

PURPOSE To compare the 3-year outcome of dental implants placed simultaneously or delayed with intraoral onlay block bone grafts. MATERIALS AND METHODS A retrospective study was conducted of patients subjected to localized lateral alveolar ridge augmentation with intraoral onlay autogenous block bone grafts before or at implant placement between 2005 and 2010 in the Oral Surgery Unit of the University of Valencia (Valencia, Spain). The parameters evaluated at follow-up visits were implant survival and success rates, peri-implant soft tissue conditions (Plaque Index and Bleeding Index, probing depth, width of keratinized mucosa, and facial mucosal retraction), radiographic peri-implant marginal bone loss, and patient satisfaction. RESULTS Thirty-four patients with 53 implants (23 delayed and 30 simultaneous) were included. After 3 years of loading, the cumulative implant success rate was 83.3% for simultaneous and 96.9% for delayed implants (P = .217). Average marginal bone loss was 1.15 ± 1.67 mm for simultaneously inserted implants and 0.29 ± 0.35 mm for delayed implants (P < .01). There were no significant differences in Plaque Index or modified Bleeding Index between the groups. Peri-implant facial mucosal recession was more frequent in the simultaneous implant group (26.6% vs. 13%), though the difference was not statistically significant. General patient satisfaction averaged 9.05 ± 0.82, and good quality of life was reported by all patients. CONCLUSION Despite its sample size and design limitations, the delayed procedure showed less marginal bone loss and a lower prevalence of facial mucosal recession than the simultaneous implant placement procedure at 3 years postloading.

Closure of oroantral communications with Bichat´s buccal fat pad. Level of patient satisfaction.

Purpose: To report the closure of oroantral communications with the pedicled buccal fat pad in a series of patients, and to determine the level of patient satisfaction after the surgery. Study Design: A prospective study of patients diagnosed of unilateral or bilateral oroantral communication (OAC) closed using the buccal fat pad between May 2012 and January 2013 was performed. Data analysis extended to: age, sex, and cause, location and size of oroantral communication. Complications and success related to buccal fat pad surgery were evaluated. Also, patient satisfaction was assessed after six months of surgery. Results: Nine patients (3 men and 6 women) with a mean age of 50.5 years and 11 OAC treated with buccal fat pads were included. The most common cause of oroantral communication was the extraction of molars. The average widest diameter of the oroantral communication was 7.1 mm. One week after the surgeries no complications were found. One month after surgery, one patient presented persistence of the oroantral communication; in this patient, the buccal fat pad technique was considered a failure, and a second intervention was performed using a buccal mucoperiosteal flap to achieve primary closure of soft tissues. After six months, patient showed closure of the communication and complete healing. All the other communications had been solved with Bichat´s ball technique, yielding a success rate of 90.9%. Mean patient overall satisfaction was 9.1 out of 10; patients were satisfied with phonetics (9.4), aesthetics (9) and chewing (9). Conclusions: The buccal fat pad technique was successful in closing 10 out of 11 oroantral communications and few complications were found. Patients were highly satisfied in overall with the treatment and with phonetics, aesthetics and chewing. Key words:Bichat’s fat pad, buccal fat pad, oroantral communication.

Dental implants with versus without peri-implant bone defects treated with guided bone regeneration

Background The guided bone regeneration (GBR) technique is highly successful for the treatment of peri-implant bone defects. The aim was to determine whether or not implants associated with GBR due to peri-implant defects show the same survival and success rates as implants placed in native bone without defects. Material and Methods Patients with a minimum of two submerged dental implants: one suffering a dehiscence or fenestration defect during placement and undergoing simultaneous guided bone regeneration (test group), versus the other entirely surrounded by bone (control group) were treated and monitored annually for three years. Complications with the healing procedure, implant survival, implant success and peri-implant marginal bone loss were assessed. Statistical analysis was performed with non-parametric tests setting an alpha value of 0.05. Results Seventy-two patients and 326 implants were included (142 test, 184 control). One hundred and twenty-five dehiscences (average height 1.92±1.11) and 18 fenestrations (average height 3.34±2.16) were treated. At 3 years post-loading, implant survival rates were 95.7% (test) and 97.3% (control) and implant success rates were 93.6% and 96.2%, respectively. Mean marginal bone loss was 0.54 (SD 0.26 mm) for the test group and 0.43 (SD 0.22 mm) for the control group. No statistically significant differences between both groups were found. Conclusions Within the limits of this study, implants with peri-implant defects treated with guided bone regeneration exhibited similar survival and success rates and peri-implant marginal bone loss to implants without those defects. Large-scale randomized controlled studies with longer follow-ups involving the assessment of esthetic parameters and hard and soft peri-implant tissue stability are needed. Key words:Guided bone regeneration, peri-implant defects, dental implants, marginal bone level, success rate, survival rate.

Replantation of a maxillary second molar after removal of a third molar with a dentigerous cyst: Case report and 12-month follow-up

The aim of this study was to describe the replantation of a maxillary second right molar, which had been removed for surgical reasons in order to remove a dentigerous cyst associated with the adjacent third molar, and the case’s 12-month follow-up. A 51-year-old man presented swelling in the right maxillary area. Radiographic examination showed a large radiolucency in close proximity to the third molar, suggesting a follicular cyst. The third molar was extracted and the cyst underwent curettage. The second molar had to be extracted to enable complete removal of the cyst and to achieve primary closure of the wound, which would have been impossible without repositioning the molar. With this objective, extraoral endodontic treatment was performed, the root-end was resected and prepared with ultrasonic retrotips, and root-end filling was accomplished with MTA before the molar was replanted. At the 12-month follow-up, the tooth showed no clinical signs or symptoms, probing depth was no greater than 3 mm and radiographic examination showed no evidence of root resorption or periapical lesion. Key words:Replantation, maxillary molar, follicular cyst, dentigerous cyst.

Comparison of peri-implant bone loss between conventional drilling with irrigation versus low-speed drilling without irrigation

Background To compare the technique of high speed drilling with irrigation and low speed drilling without irrigation in order to evaluate the success rate and peri-implant bone loss at 12 months of follow-up. Material and Methods A randomized, controlled, parallel-group clinical trial was carried out in patients requiring dental implants to rehabilitate their unitary edentulism. Patients were recruited from the Oral Surgery Unit of the University of Valencia (Spain) between September 2014 and August 2015. Patients who met the inclusion criteria were randomized to two groups: group A (high-speed drilling with irrigation) and group B (low-speed drilling without irrigation). The success rate and peri-implant bone loss were recorded at 12 months of follow-up. Results Twenty-five patients (9 men and 16 women) with 30 implants were enrolled in the study: 15 implants in group A and 15 implants in group B. The mean bone loss of the implants in group A and group B was 0.83 ± 0.73 mm and 0.62 ± 0.70 mm, respectively (p > 0.05). In the maxilla, the bone loss was 1.04 ± 0.63 mm in group A and 0.71 ± 0.36 mm in group B (p > 0.05), while bone loss in the mandible was 0.59 ± 0.80 mm in group A and 0.69 ± 0.77 mm in group B (p > 0.05). The implant success rate at 12 months was 93.3% in group A and 100% in group B. Conclusions Within the limitations of the study, the low-speed drilling technique presented peri-implant bone loss outcomes similar to those of the conventional drilling technique at 12 months of follow-up. Key words:Low-speed without irrigation, drilling technique.