This case deals with the application of the malpractice statute of limitations, N.C. Gen. Stat. Sec. 1-15(c) (1983), to a dental malpractice action involving a failure to diagnose and treat a periodontal disease.
On 12 November 1981 the plaintiffs, Maureen Schneider and her husband, Thomas Schneider, instituted this action to recover damages for the defendants’ negligent treatment of Mrs. Schneider. The Schneiders alleged that the defendants, Bruce V. Wainright, D.D.S., a dentist, and his corporate entity, Bruce V. Wainright, D.D.S., P.A. (hereinafter referred to as the Wainright defendants) negligently treated Mrs. Schneider from October 1976 until 27 October 1978. The Schneiders further alleged that the defendant, William B. Brunk, D.D.S. (Brunk), an orthodontist, negligently treated Mrs. Schneider from October 1976 until 2 November 1978.
All the defendants filed motions to dismiss based on the statute of limitations under N.C. Gen. Stat. Sec. 1A-1, Rule 12(b)(6) (1983). The trial court treated the Wainright defendants’ motion to dismiss as a motion for summary judgments under N.C. Gen. Stat. Sec. 1A-1, Rule 56 (1983), after considering matters outside the pleadings, including depositions. From its grant of partial summary judgment to the Wainright defendants on all claims arising prior to 23 October 1978, the Schneiders appeal.
I
The Wainright defendants contend that this interlocutory appeal is premature and therefore should be dismissed. All the parties have stipulated in the record on appeal that Brunk’s Rule 12(b)(6) motion to dismiss based on the statute of limitations has never been “heard, ruled upon, withdrawn, dismissed, or in any way disposed of at any time during the pendency of this matter.” Moreover, all the parties have stipulated in the record that Brunk is not a participant in this appeal.
*562Is the trial court’s order granting the Wainright defendants partial summary judgment subject to appellate review at this juncture? The order did not totally dispose of all the Schneiders’ claims against the Wainright defendants, nor did it dispose of any of their claims against Brunk. Significantly, the trial court did not certify in the order that there was no just reason for delay in entering a final judgment. Therefore, under G.S. Sec. 1A-1, Rule 54(b) (1983) no appeal would ordinarily lie. However, the order may still be appealable of right if it affects a “substantial right.” N.C. Gen. Stat. Sec. 1-277(a) (1983); N.C. Gen. Stat. Sec. 7A-27(d) (1981).
The facts and circumstances of each case and the procedural context of the orders appealed from are the determinative factors in deciding whether a “substantial right” is affected. Waters v. Qualified Personnel, Inc., 294 N.C. 200, 240 S.E. 2d 338 (1978). Recently our Supreme Court held that a plaintiffs right to have all his claims against joint tortfeasors heard before the same jury affects a substantial right. Bernick v. Jurden, 306 N.C. 435, 293 S.E. 2d 405 (1982) (possibility of inconsistent verdicts); see also Swindell v. Overton, 62 N.C. App. 160, 302 S.E. 2d 841 (1983), rev'd on other grounds, 310 N.C. 707, 314 S.E. 2d 512 (1984).
In the case before us the Schneiders are not only faced with the possibility of inconsistent verdicts, but they are also faced with the virtual eradication of their claims against the Wainright defendants. Originally they sought damages for the two-year period from October 1976 until 27 October 1978. The entry of partial summary judgment for the Wainright defendants reduced the Schneiders’ claim to the four-day period from 23 through 27 October 1978. There was only one contact between Mrs. Schneider and the Wainright defendants during that time. The remaining four-day claim is a symbolic vestige of the original Complaint. Moreover, there is a strong likelihood that the trial court will make the same ruling on Brunk’s Rule 12(b)(6) motion. Further, many of the facts to be proved in the claims against the three defendants are identical and/or very closely related in time. See Estrada v. Jaques, 70 N.C. App. 627, 321 S.E. 2d 240 (1984). Therefore, we are persuaded that a “substantial right” is affected and the Schneiders’ appeal is before this Court of right.
*563II
Maureen Schneider first consulted Dr. Wainright in October 1976 after she and her husband moved to Raleigh, North Carolina. At the time she was aware of limited periodontal problems — gin-gival recession and shifting teeth. In fact, she had been treated by a periodontist for several months prior to the move. She told Dr. Wainright that her periodontist had recommended that her new dentist again refér her to a periodontist. In its brief, the Wainright defendants acknowledge that in October 1976 Dr. Wainright “found that Mrs. Schneider suffered from generalized recession, and food impaction problems.” However, Dr. Wainright suggested an alternate form of treatment to Mrs. Schneider; he referred her to an orthodontist, Dr. Brunk, rather than a periodontist. On 10 and 24 January 1977 Dr. Wainright extracted a total of four of Mrs. Schneider’s teeth. In February 1977 Brunk placed orthodontic appliances (braces) on the remaining teeth. Mrs. Schneider continued seeing Dr. Wainright for regular checkups until 27 October 1978, a total of six visits subsequent to the extractions. In their Complaint, the Schneiders allege the following negligent acts:
28. The defendants failed to diagnose the existence of a periodontal disease in the plaintiff when such disease should have been evident in the exercise of the degree and professional skill and judgment ordinarily exercised by a member of their professions similarly situated.
29. Defendants failed to note the marked progression of the periodontal disease in the plaintiff even though such progression was readily visible and was apparent in the exercise of the degree of care and professional skill and judgment ordinarily exercised by a member of the defendants’ profession, similarly situated.
30. As a result of the orthodontic treatment provided to plaintiff Maureen Schneider, by defendants Bruce V. Wain-right and William B. Brunk, whereby four more healthy bicuspid teeth were removed from Maureen Schneider, there was excessive movement of the surrounding teeth, resulting in dental problems including but not limited to root resorption, gaps between the molar teeth and severe periodontal problems and periodontal disease.
*56431. The orthodontic treatment caused or aggravated the periodontal problems and periodontal disease resulting in severe damage to the gum tissue and bone of plaintiff.
32. Defendants Bruce V. Wainright and William B. Brunk were negligent in failing to provide proper diagnosis and treatment to plaintiff Maureen Schneider in removing four extra teeth and placing braces on the plaintiffs remaining teeth.
33. Defendants Bruce V. Wainright and William B. Brunk were negligent in removing more teeth than necessary, and in placing braces on plaintiffs teeth.
According to the Schneiders, the proximate results of the three defendants’ negligence included:
extensive periodontal surgery including but not limited to soft tissue grafts, gingival flaps, bone grafts, bone surgery, and periodontal prophylaxis, and extensive reconstructive work on [Mrs. Schneider’s] teeth including but not limited to root canal therapy on two of her teeth and the placement of crowns on other teeth in order to fill the gaps between her teeth and to attain maximum gingival health.
The Schneiders argue on appeal that the malpractice statute of limitations, G.S. Sec. 1-15(c) (1983), is not a bar to their claims against the Wainright defendants for the period from October 1976 through 22 October 1978; the statute did not begin to run until Mrs. Schneider’s last dental visit with Dr. Wainright on 27 October 1978. For the following reasons we agree and conclude that the trial court erred in granting partial summary judgment for the Wainright defendants on the statute of limitations defense.
Summary judgment may be granted when the movant establishes a complete defense. Ballinger v. Dep’t of Revenue, 59 N.C. App. 508, 296 S.E. 2d 836 (1982), cert. denied, 307 N.C. 576, 299 S.E. 2d 645 (1983). In ruling on the motion the trial court must accept the evidence in favor of the non-movant in the light most favorable to that party, with all reasonable inferences therefrom. Whitley v. Cubberly, 24 N.C. App. 204, 210 S.E. 2d 289 (1974). The trial court must consider all papers before it, including the pleadings and any depositions. Estrada v. Jaques.
*565We begin our analysis with the plain language of the relevant statute, G.S. Sec. 1-15(c) (1983). It provides, in pertinent part, that: “a cause of action for malpractice arising out of the performance of or failure to perform professional services shall be deemed to accrue at the time of the occurrence of the last act of the defendant giving rise to the cause of action. . . .” Id. (Emphasis added.) As can be seen, G.S. Sec. 1-15(c) establishes two separate grounds for malpractice: (1) the performance of professional services; and (2) the failure to perform professional services.
The Wainright defendants assert that the teeth extraction in January 1977 was Dr. Wainright’s “last act,” since all subsequent contacts were “routine dental checkups.” They mistakenly rely on Stanley v. Brown, 43 N.C. App. 503, 259 S.E. 2d 408 (1979), disc. rev. denied, 299 N.C. 332, 265 S.E. 2d 397 (1980). In Stanley the plaintiff discovered a protrusion on the left side of her vagina several days after the defendant doctor had operated on her vagina. During two follow-up visits to the defendant doctor, he did not acknowledge any negligence. Another doctor informed plaintiff that the defendant had incorrectly performed the operation. This Court held that the date of the plaintiffs operation was the time of the defendant’s “last act,” although plaintiff had had two follow-up visits. Thus, in Stanley, the plaintiffs injury and the defendant’s malpractice occurred through the defendant’s performance during the operation.
Stanley is distinguishable from this case. Here, the defendant’s failure to perform is the grounds for the malpractice action. The Schneiders allege that Dr. Wainright failed to diagnose and treat Mrs. Schneider’s periodontal disease over a prolonged period of time. From Dr. Wainright’s deposition testimony it is clear that each “routine dental check-up” was a separate opportunity to discover periodontal problems. He admitted in his deposition joint ongoing responsibility with Dr. Brunk, while Mrs. Schneider was in his care, for monitoring her periodontal condition and referring her to a periodontist if there were any deterioration. Consequently, Dr. Wainright’s duty to diagnose and treat Mrs. Schneider’s periodontal disease did not terminate with the teeth extraction; it continued for the entire time she was under his care. See Sunbow Industries, Inc. v. London, 58 N.C. App. 751, 294 S.E. 2d 409, disc. rev. denied, 307 N.C. 272, 299 S.E. 2d 219 (1982) (attorney’s continuing duty to file financing state*566ment). Therefore, the Schneiders’ cause of action accrued on 27 October 1978, the date of the last “routine dental checkup.” The visit on 27 October 1978 signified the “last act” of Dr. Wainright — in this case — his last neglected opportunity to diagnose and treat Mrs. Schneider’s periodontal disease.
We hold that the trial court erred in granting the Wainright defendants’ partial summary judgment on all claims arising prior to 23 October 1978.
Vacated and remanded.
Judge Phillips concurs. Judge Arnold dissents.